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Dyno DataMite User`s manual

1. RPM Accel Times This special report gives the time for the engine to reach various RPM levels as shown in Figure 3 4 Times are given both for cumulative time from the first RPM and time between each RPM step 85 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Figure 3 3 Pick Individual Items Report from settings in Figure 3 2 A DataMite Data Analyzer 2 0 Performance Trends REEDOS CFG En Back Print Report Types File Help F1 Operator Tom 5 22 am 04 11 2000 PkTq 33 89 10250 2 047 Bore E Send Cmnts Eng Cor To 29 92 60 dy PkHP 66 91 10500 1 815 Corr Factor 1 052 Customer Peterson 5 97 cid 2 Cycle Stroke 9 02 12 03 9 20 13 19 9 56 14 62 10 54 17 12 11 19 19 22 12 05 21 86 12 92 24 68 13 17 Pk 26 40 Pk 12 32 25 86 11 74 25 75 11 04 25 26 10 47 24 96 9 41 23 32 9 02 23 23 8 48 22 64 95005 11 61 22 31 Figure 3 4 RPM Accel Times Report a DataMite Data Analyzer v2 0 Performance Trends REEDOS CFG Bele En Back Print Report Types File Help F1 lj x Operator Tom 5 22 am 04 11 2000 PkTq 33 89 10250 2 047 Bore E Send Cmnts Eng Corr To 29 92 60 dy PkHP 66 91 10500 1 815 Corr Factor 1 052 Customer Peterson 5 97 cid 2 Cycle Stroke oe 20 i C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 87 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 88 C Performance Trends Inc 2000 Dyn
2. lt gt or spaces or periods unless you include the CFG extension yourself 109 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output e Names with lower case letters These letters will be converted to upper case once the file is saved Test files are saved to folders directories you have created in the DTMDATA folder directory in the DTM20 folder directory under PERFTRNS PTI folder directory You can copy Windows Dyno DataMite Analyzer files from programs on other computers to this folder directory and they will be found by the program The Windows Version 2 0 will read files produced with the older DOS v1 1 or 1 2 Just copy them into a folder under the DIMDATA folder other than the Examples folder The Save to Floppy and Open From Floppy commands discussed on page 18 are an alternate perhaps easier way to copy files from one computer to another The method of saving an Engine file is exactly the same as complete Test Files except that you access the Save menu by clicking on File at the top of these individual menus as shown in Figure 3 29 These files are saved to the ENGINE folder subdirectory Figure 3 31 Advanced Open or Save Screen Advance Open or Save UZELE Screen File name Folders d vbwin cam a examples If you click on the Advanced lt c8094 s 104 Sy ds button in either the Open or Save ud6060 s 107 a vbwi As screen you will obtain the xerltrk pti a yi i screen shown in
3. 1 3 115 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 116 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Chapter 4 Examples Each example in this chapter becomes progressively more complex assuming you have performed and understand the preceding example Section 1 5 s example is somewhat more basic than Example 4 1 so it may be a better place to start if Example 4 1 looks complicated The results shown in these examples may be somewhat different than what you obtain with your particular version of the program That is due to minor upgrades in the calculations in later versions 117 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples 118 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Example 4 1 Installing the DataMite on an Inertia Dyno and Running a Test Suggested Background Reading e Section 1 5 Example to Get You Going e Appendix 4 Hardware Installation and Operation This example demonstrates the basic steps to installing a standard 4 channel DataMite on an Inertia Dyno setting up the program s specs for an Inertia Dyno and running a dyno test This example will be very thorough so all possible steps are presented You may decide to omit some steps DataMite Installation Example 4 1 will be fairly long covering the entire process of getting and analyzing data We will assume you have ins
4. Five 5 other critical specs are listed separately at the top 1 File Name for New Test is the file name the program will create for saving the Dyno Data for the new test you are starting The program fills in a default name of the current test name but incrementing the last digit in the name by 1 You can change this name to most anything you like The program will warn you if the name entered is not valid and show you what is wrong 2 Operator for New Test is the name of the operator for this test Click on Pick to pick an operator name already used or to enter anew name The program defaults to the operator of the current test 3 Engine for New Test is critical for shops who use a engine numbering system Click on Assign to create a new Engine based on the last Engine assigned incremented up by 1 or to start with a new type of Engine If you want to type in most anything you want for an Engine Number or leave it blank go to the Preferences menu and set Allow Direct Entry of Engine Numbers to No 4 Folder Name for New Test is the folder in the DIMDATA folder where the test will be saved The program may not be using the name folder for this spec but whatever word you have assigned in the Preferences menu at the Main Screen The folder name Examples is reserved for Performance Trends example tests supplied with the program and can NOT be used for your tests 5 Type of Test describes what type of test was run and how the
5. e They should keep the sensor away from heat either exhaust or brake heat e To avoid vibration problems see Figure A3 3 in Appendix 3 Troubleshooting 4 Select DataMite Mounting Locations A good place to mount the DataMite module and control panel would on a metal plate away from the engine Metal is preferred because it can absorb some of the electrical noise emitted by the engine s ignition system Keeping the DataMite box away from the engine also reduces the likelihood of electrical noise problems To mount the DataMite module hold the module in place on the flat surface you ve selected and mark the 2 bolt holes Drill holes as required When bolting the module in place DO NOT overtighten Tighten just until the rubber grommet starts to compress Use a flat washer against the rubber grommet and a lock washer against the nut In extreme vibrating conditions you may have to double nut to avoid loosening of the mounting bolts The standard mount for the push button control panel is to attach the supplied high grip Velcro strip to the mounting location Peel the backing from this strip and press it firmly onto a clean dry oil free surface Do not touch the adhesive surface The surface should be smooth flat and away from heat 65 85 degrees Then simply press the control panel enclosure with its own mating Velcro strip into this mounted Velcro You should hear an audible snap when closure is made Note The cable from the contr
6. 126 Click on the down arrow button to select either 2 Stroke or 4 stroke engine types p15 You choose to do it now before downloading so click on the See Specs button Click on File then Open Example Engine to see if there are some Briggs specs saved as an Example Engine File There are so choose the STOCK BR GGS engine file to fill in much of this screen Then you can go through each specs to make sure it matches your engine When you are finished changing the specs you should save these specs in the Engine Library This will save you time in the future in the event you run this engine again Click on File then Save Engine As to save this engine file Note that the Engine File is only the specs you see on this screen not DataMite Dyno Test Conditions specs etc C Performance Trends Inc 2000 Dyno DataMite Analyzer Figure 4 10 Filling Test Conds Menu w Test Options Back Help Type of Test Meas Tq HP from Accel Test Room Weather Conditions Method of fieading Weather Data Uncon Bafo with Dew Pt gt Obs Barometer Hg Air Temperature deg F Dew Point deg F Elevation feet These specs are for information only and can be left blank if you want You can enter head temp for water temp for this air cooled l Correction Factor Dyno Conditions Water Temperature deg F Oil Temperature deg F Corregt To
7. 3750 15 66 10000 26 25 10500 14 77 10750 14 63 10000 14 61 10250 34 38 15750 3626 64 9500 00 0 9 56 5250 Click on Test Title 1st Column to Open that test Click and slide button on right for more History info Tq HP corr to 29 92 60 dry History Log and eventually fall off the list as you work with new tests However Tests marked Yes do not fall off the list Click and move slide bar down to display all 25 100 tests in the History Log Click and move slide bar right to display more columns of test results From this screen you can Open a test file by clicking on the Test File and Path column first column on the left If the test file was saved to a standard folder directory or whatever you have chosen to call folders in the Preferences menu the folder name is given first followed by the test file name If a test file has been Opened from or Saved to a non standard folder a folder not in the DTIMDATA folder using the Advanced function the entire path is given If the Path and File Name won t fit it is shortened and preceded by You can choose to Save certain results you believe are special and you may want to recall or graph in the future by clicking on the Save column to insert a Yes there Tests marked Yes to Save eventually move to the bottom of the History Log but are never dropped off the list or erased until you again click on the Yes to make it blank Not
8. Erase Outline to erase the current outline so you can draw the outline again Engine RPM vs Time yam 00 0003 all Engine RPM Click and drag mouse to draw a frame around the part of the test you want to keep DO NOT try to start or stop the frame at the exact start or end of the test run Leave some data at least 3 seconds at the Time sec beginning and end so the program can find the Sy St oe ee eee to i toe a ee eccboehocescss 75 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions If you click on Edit then Delete Beginning or End of File you will be presented with a Figure 2 43 Options Presented When You Click on OK graph screen showing Engine RPM for the keep this section this entire test Click and drag the mouse to draw a square frame around the portion of Save This Section to New Name Ea IN Do you want to save this section of test starting at 1 seconds and the test you want to keep The rest of the test will be deleted When you are satisfied with the section you ve drawn click on OK keep this section to be presented with the s options shown in Figure 2 43 REEDOS CFG click on Yes extending to 17 seconds to the current file name Click on No to save to a New Name or click on Cancel to not save If you select No you will then be asked for a any changes new name to which this data will be saved This is the method used to break up 1 tes
9. Help and Legends of the graph Check or uncheck these 4 options to determine what gets printed and what options are enabled and disabled on this screen Bottom Section of Printed Graph Graph Comment Test Summary Test Comment C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Cursor The cursor feature is very useful for determining or comparing the value of the graph lines at various places See Figure 3 20 for explaining the use of the cursor Figure 3 20 Cursor Features and Commands Cursor line usually pink or green depending Click here to turn cursor ON on background color Click here to turn cursor OFF Click on these buttons to move the cursor left or right Hold down the lt shift key gt while clicking these buttons and the cursor moves faster You can enable the cursor by clicking on View then Turn Cursor On w DataMite Analyzer 2 0 YAM 925 CFG x Back File Format New Graph Type Add Tast Mistdry Log Single Test Help The value of each lal lE O N ele elele peje ae Fuview SetSscaes graph line at the Corr Tq Cor HP vs RPM yam100 0003 1 cursor is displayed here yam 950 1 Corr Tg 7 68 Corr HP 13 23 The X value of the cursor is shown here in this case 9050 RPM 6000 8000 10000 12000 14000 16000N RPM 9050 You can also enable the cursor by single clicking on a graph line at a data point This also provides a quick way to move the cursor f
10. Send Io Create Shortcut Delete EX Pe Rename Properties X Exploring pfa30 File Edit View Go Favorites Tools Hel ma Back Forverd All Folders A Desktop My Computer 3 Floppf A lt C 5 AOL Instant Messenger E Aol25 166 Ree PPeeee LFEOI exe Drag slide bar to the top of the list to find your Floppy disk drive usually A File Folder File Folder 5 19 99 3 23 PM 5 1 3 23 PM File Folder File Folder File Folder File Folder File Folder File Folder 5 19 99 3 24 PM 5 19 99 3 24 PM 5 19 99 3 24 PM 5 19 99 3 23 PM 5 19 99 3 24 PM 5 1 9799 3 24 PM Open Eind Backup Copy Disk Add to Zip Sharing Scan with Norton Arfi irus Format Paste Create Shortcut Te onan Appendicies Click and drag the slide bar button to move up and down the list of folders The contents of the open clicked on folder on the left is shown here including both folders and files Right click with the right mouse button on the DTMDATA folder not seen here to open a menu of options Click on Copy to copy the entire contents of the DTMDATA folder the entire test file library DO NOT click on Cut Right click on the Floppy drive icon Then click on Paste to paste whatever you copied in t
11. will only affect accuracy and not repeatability e Additional corrections can be made in the Pro version for losses in accelerating the engine s inertia The engine s inertia is also estimated by inputs in the Short Block section of the Engine Specs menu These are also an estimate An error here will only affect accuracy and not repeatability 147 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies For an absorber dyno it is important for the load measurement and torque arm length be measured accurately See Appendix 5 for the calibration process An error here will only affect accuracy and not repeatability For absorber dynos it is also important that the bearings which support the absorber have very little friction See Appendix 5 An error here will affect accuracy and repeatability Corrections can be made for changes in weather conditions to produce Corrected Torque and HP readings It is critical that you accurately enter the weather conditions for each test in the Test Conds menu See Section 2 3 An error here will affect accuracy and repeatability General Testing Tips 148 Dyno tests DO NOT repeat exactly from run to run Minor changes in temps procedure measurement system produce minor changes which can add up to 1 2 difference from test to test The more time and the more engine teardowns between dyno pulls the more likely you will have differences Always anticipate what your modification sho
12. Basic version or the full Professional version for Enter Unlocking Code i Help ten days All features are working in demo mode Click on Help for more info on how you use this screen to unlock this program Sometime during those 10 days you must call Performance Trends to obtain an Unlocking Code This Unlocking Code will be for either the Basic version or the Pro Version whichever you have purchased Before you call Performance Trends you should get your disk serial number registered name and code number and computer hardware number These are available by clicking on file in the upper left hand corner of the Main Screen then clicking on Unlocking Program Options A screen will appear as shown in Figure 1 2 Performance Trends will provide you with an unlocking code number Type in the unlocking code number and click on OK If you typed in a number correctly you will be given a message that the program is permanently unlocked to either the Basic or Pro mode The program will only run on this one computer If you want to run the program on another computer you must install it obtain the computer hardware number and registered code number as shown in Figure 1 2 and call Performance Trends for a new Unlocking Code for that computer There may be a charge for additional computers Also See Section 1 2 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction C Performance Trends Inc 2000 Dyno Dat
13. Channels 2 3 and 4 can record several different things Figure A2 7 and A2 8 gives typical sources for Engine RPM signals for various ignition systems Inertia Dyno The standard harness comes with a wheel RPM sensor on Channel 2 and 3 For an Inertia Dyno either of these can be used to measure the RPM of the Inertia dyno Absorber Dyno The standard harness comes with a wheel RPM sensor on Channel 2 and 3 and a 6 pin plug for an analog converter on Channel 4 Either wheel RPM sensor can be used to measure the RPM of the dyno You can plug in the analog converter for measuring the torque arm load on the 4th channel See Appendix 4 For most situations which channel is attached to which sensor can be easily changed in the program See Section 2 5 DataMite Specs 3 Build Brackets Mount Magnets For inertia dynos epoxying the standard magnets supplied to the outside of the inertia wheel works well For an additional charge Performance Trends can supply other types of magnets for other installations including e Tiny approximately 1 4 diameter 050 thick magnets to be epoxied in place These usually work better on driveshafts or smaller diameter shafts or wheels e High temperature magnets which withstand higher temperatures e Small plastic bolts 1 4 x 20 with magnets embedded in the head for mechanically fastening the magnets Figure A2 1 Spacing Required for RPM Sensor and Magnets Mount on Edge of Inertia Wheel 050
14. Figure A3 3 practical and stiff fairly thick material Eliminate Electrical Noise Sources about 12 gauge or Bos sealer ee thicker There can be several sources of electrical noise which can Rubber Washers on top of look like additional spark firings to the DataMite The bracket bottom or both major source is from the spark plug wires Solid core wires eae Mounting surface trans extension housing can produce noise to the DataMite just as they do to an AM rear axle housing brake backing plane etc radio Switch to resistor or suppresser spark plugs and plug wires Also check that the spark plug gap is proper and the spark is not arcing somewhere for example around a fouled plug Running the engine in the dark can show up arcing plug wires Try to position the yellow Ignition lead and any other DataMite cables away from the plug wires other ignition components etc Position the DataMite away from the fire wall engine or ignition system If the noise problem still persists try shielding the yellow ignition lead and or possibly the leads to the wheel sensors Wrap with aluminum foil or cable shield available from electronics stores and attach a wire from the foil or shield to a good dyno frame or engine ground Use a clean steady power source which can maintain 9 16 volts A battery is excellent source if you wire directly to the battery Do not power the DataMite from a terminal which also powers the ignitio
15. File name 38 Filter 1 16 17 23 25 33 77 83 92 93 111 112 129 136 141 142 145 161 163 Filtering 16 17 25 77 83 92 93 112 129 136 141 142 145 161 163 Finish Engine RPM 54 55 Floppy Drive 18 167 Flywheel Wt amp Dia 35 Folders 2 8 12 18 25 34 72 89 110 112 113 128 135 165 167 168 Freq hz 45 172 173 Friction Losses 3 148 175 Fuel 30 37 Fuel Delivery 37 Fuel Setting 37 Fuel sp g 30 Gap 36 Gasket Bore Dia 64 Gasket Thickness 63 64 Gauge Settings 60 Graph 8 12 15 17 19 24 25 76 77 83 89 91 92 94 95 96 97 98 99 100 101 113 114 115 129 130 131 136 137 138 140 141 142 143 145 163 176 Graph Type 129 142 Graphs 6 91 92 94 96 101 136 138 139 145 Grid 17 Head s 19 36 Headers 38 Help 2 3 4 8 9 17 20 55 63 72 126 History Log 1 18 24 81 92 94 95 108 113 114 115 142 143 horsepower 85 HP 1 8 9 15 16 17 20 24 25 27 29 30 41 44 49 52 56 72 76 77 79 85 111 112 114 123 128 129 130 131 135 136 140 141 142 143 144 145 147 148 150 163 176 Humidity 28 66 67 Hydraulic 56 Icon desktop 4 7 103 165 167 Ignition 36 157 162 Include Averages 84 Include Text 89 Inductive Pickup 119 149 151 152 159 161 162 Inertia Dyno 4 1 3 17 30 35 44 49 50 51 52 54 55 77 85 119 122 123 124 125 128 129 14
16. Print Print Blank Worksheet Windows Print Setup VivDia PortCCs RARatio Lash E Int Exh LI LI l Figure 3 27 Print Button Other Print Options Engine Accel RPM sec Other menus have print menu commands Dyno wheel RPM 3 Calcd gear ratio or print buttons as shown in Figures 3 26 Clutch converter slip and 3 27 Observed flywheel torque ec Observed flywheel HP Corrected flywheel torque Corrected flywheel HP Other Graph Specs Mine or APM Graph Many screens and menus What to Graph have a Print button Click Filtering on it to print that particular screen or menu Notes Data Selected to Graph 4 types max Corrected flywheel torque Corrected flywheel HP Make Graph Help Cancel Pint 104 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 105 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 106 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 3 5 Data Libraries The Dyno DataMite Analyzer allows you to save recorded DataMite Data and related specs Engine Specs Test Conds etc to the Test File Library under a name of your choosing You can then open these test files out of the Test File Library in the future for comparison or modification The Open window is explained below with explanations Figure 3 28 Test Library Options Click on File then Open from all saved
17. chev xchvstk ptt new one New ones are saved by the program and added to the list Test Time amp Date 12 27 pm 09 17 1999 For Advanced Users To delete or change customer names in this list use lige Nils Hel Cancel Print WordPad or NotePad and edit the Customer pti file in the DTM20 folder but g keep a backup in case you make a mistake Comments Type in comments to help describe these engine specs These comments are saved with the Test File with the Engine File if you save the Engine File and can be printed out with the Engine Specs when reports are printed Short Block Specs Type Click on the down arrow button to select either 2 Stroke or 4 stroke engine types Bore Cylinder bore measured in inches Cylinders Number of cylinders in the engine ex for a V 8 this would be 8 34 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Stroke Piston stroke measured in inches This specs is also used only for correcting engine power for engine inertia effects See Correction Factor in Test Options Rod Length Center to center connecting rod length measured in inches C R Compression Ratio Click on the Cle button to calculate Compression Ratio from other inputs Block Type in most any comment to describe the block bearings deck height etc No entry is required Piston amp Rods Type in most any comment to describe the Pistons wrist pins rings
18. not 95 open then 94 open etc An RPM signal is a series of switch openings and closings How close these changes come together determines the RPM See Figure A5 1 Figure A5 1 Examples of Various Types of Sensor Signals Analog for example throttle angle Switch digital RPM frequency This time Full Open Throttle determines 3 4 Throttle the RPM 1 2 ae Closed Throttle mS 1 4 Throttle Switch Sensors and RPM Sensors do not require much calibration Tell the program if either high or low voltage is opened or closed or On or Off and the switch channel is calibrated Just tell the program how many pulses you get on 1 revolution of a shaft and the RPM channels are calibrated These 2 types of channels are not usually in error just some It is usually very obvious if there is a calibration error like specifying the wrong number of magnets on the dyno inertia wheel Analog signals are more complicated In the example above the close throttle position could occur at 48 volts and the full open throttle could occur at 4 73 volts Or the F F close throttle position could occur at 3 21 volts Figure A5 2 Illustration of a Analog Sensor Calibration and the full open throttle could occur at 1 76 volts Just about any 2 combinations of Absorber Dyno Load conditions could happen If you don t tell the 2nd Value computer the correct combination the data may x 4 4 volts 28 Ibs be off just a little bit or be completely wrong
19. tests for comparisons The Graph options are discussed in detail is Section 3 3 page 91 Report The Report command lets you create reports of several different types of data from the current test The Report options are discussed in detail is Section 3 1 page 83 Test Conds The Test Conds command opens up the Test Conditions menu There you tell the program what type of test you ran and the weather conditions which are used for the correction factor In the Pro version you can also specify what type of corrections you want to make and have a place to record some running conditions like coolant temp etc Engine Pro version only The Engine command opens up the Engine Specs menu There you can describe the engine you are testing Some of these inputs are actually used for calculations like if you want corrections made for Engine Inertia effects in Test Conditions Then inputs like Stroke Crank Weight etc are used to estimate Engine Inertia Many of the other specs like Head s Cam etc are just spots to record info about this engine Engine Specs are discussed in detail in Section 2 4 page 33 DataMite The DataMite command opens up the DataMite Specs menu where you can describe the DataMite you are using what each channel is recording and how each channel is calibrated 19 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions The specs in the DataMite menu are critical for accurate results Be sure
20. this area will fill the whole graph This feature is disabled if the cursor is turned on Also start the upper left corner well away from a graph line or the program may turn on the oO cursor instead 4000 6000 8000 10000 12000 14000 16000 RPM Figure 3 23 Menu to Specify Graph Axes Scales This menu can be obtained 2 ways You can click on View in the menu bar then Specify Scales axes or click on the Set Scales button the right most button on the graph screen Depending on the type of graph data you currently working with one of these 2 sections will be The current scale limits are Graph Sicales loaded when this menu opens RPM Data ime Data Change any or all these to most ny val want Max RPM 15000 Max Time sec any vate you wa Min RPM Min Time sec Click the Turn Autoscaling Off Max Recorded Y Data Max Y Data er PA eile rl to z enable changing specs in this Min Recorded Y Data 5 Min Y Data menu Click on OK to have the graph redrawn to these new scale C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Time Aligning shifting Graphs Many times you may want to realign graph with respect to another for example to line up the start of an acceleration etc The program allows you to shift advance or delay one test over another on the graph as shown in figure 3 24 Figure 3 24 Showing Options to Shift Dat
21. x Back File Format View GraphType AddTest HistoryLog Multiple Tests Help estes elle lellei beled ziehe sca vam100 0003 1 3 1 1 1 1 1 4 9000 10000 11000 12000 13000 14000 15000 RPM 4 0 5 6000 7000 8000 ta DataMite Analyzer v2 0 YAM 1000 CFG x Back File Format View GraphType AddTest HistoryLog Multiple Tests Help dade elele eo Tee belo st ravew fse soned Corr Tq Corr HP Corr Tq Corr HP vs RPM i i 7 0 i i 1 L 1 1 1 1 4 gooo 10000 11000 12000 13000 14000 15000 RPM 4 0 7 7 6000 7000 8000 w DataMite Analyzer v2 0 YAM 1000 CFG x Back File Format View GraphType AddTest HistoryLog Multiple Tests Help dAl elel Lede Ded belo x t rurview et seats Corr Tq Corr HP vs RPM yam100 0003 1 Dyno DataMite Analyzer 4 0 6000 7000 s000 9000 10000 11000 12000 13000 14000 15000 RPM Chapter 3 Output Note that the peak is the highest and the valley is the deepest when filtering is the least in this case None These torque and HP graphs look fairly smooth even with Filtering None so even None would be an acceptable for these torque and HP graphs Filtering None In most cases for torque and HP graphs Filtering Some is the best choice The peak torque and HP values for this graph are fairly accurate and repeatable For other types of data Some or None is best Picking a Filtering Level too high can distort the data and cover up pro
22. 14 Main Screen After Downloading Test Data ZE DataMite Data Analyzer 2 0 Performance Trends STKBGSO1 CFG Efx File Edit Graph Report TestConds Engine DataMite Dyno Preferences Help If you did not enter good weather conditions yet for this test then it is usually Run 1 better to graph and analyze zo Observed Torque and HP Test amp Engine Conditions Wau Cima You will also notice that we 2 577 Bore 9 57 am 03 06 2000 Briggs Jri yp 95 6 cam set filter ing to Light PkTq 10 09 2250 NGK BUSH surface gap plug PkHP 5 45 4000 Help This table shows Tq amp HP values for this run Click and drag the slide bar up or down to view all results Click on a data point on some This is usually a good compromise between getting rid of some of the jumpiness of torque and HP data and over Operator Tom filtering which can distort 75 ISS the data 9 94 10 09 Pk j j For more details on other asg graph options check 8 80 r Example 4 2 Analyzing 8 43 i Dyno Data 7 96 7 51 7 09 6 67 6 18 R 2000 3000 4000 5000 6000 If you had just run this test for a particular customer then you may like to give that customer a printout of the results Click on Back to return to the Main Screen from the Graph Screen as shown in Figure 4 17 Then click on File then Print as shown in Figure 4 19 to obtain the Test Summary Printout shown in Figure 4 20 Figure 4 16 Grap
23. 29 92 7 60 deg dry air section to keep notes about this Test amp Engine Conditions 3 This Summary Graph shows Tq and HP for current run for this test file If you click on a graph line as pointed out here that data point will be displayed and 26 51 Pk highlighted in the v 0 Z 2615 5000 7000 9000 11000 13000 15000 Test Data grid ae eee 4 Click on slide bar and slide up or down to display all results The Filtering smoothing of the power curve and RPM increments are selectable in the Preferences Menu Section 2 2 Peak torque and HP are marked with Pk 2 1 1 Tabs A test you download from the DataMite usually is for only 1 dyno run however can be for as many runs as the DataMite s memory can store possibly 10 or more You move to different dyno runs of this test by clicking on the Tabs at the top of the screen If you want to break up a test of 2 or more runs into smaller tests possibly with only 1 dyno run per test click on Edit at the top of the Main Screen and select Delete Beginning or End of Run See Section 2 10 page 75 15 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 1 2 Engine and Test Conds Bore Pro version only Stroke Pro version only cid Cycle Pro version only Describes the size of the engine and type of engine 2 or 4 stroke based on settings in the Engine Specs menu Click on this item to display the Engine Specs
24. Analog Converter M Sensor Analog Converter M Sensor Analog Converter Sensor Type Dyno Torque ft Ibs x Sensor Type Dyno Torque ft Ibs M Sensor Type Dyno Torque ft Ibs M Data Name Chni 4 Data Name Chni 4 Data Name Chni 4 Analog Sensor Specs Analog Sensor Specs Analog Sensor Specs 1st Value ft Ibs torque ao 1st Value ft Ibs torque 1st Value ft Ibs torque o 1st Value freq hz Read z 1st Value freq hz 1st Value freq hz Read 2nd Value ft Ibs torque ia 2nd Value ft Ibs torq 2nd Value ft Ibs torque 96 75 2nd Value freq hz Read 2nd Value freq hz 2nd Value freq hz Read l Note l Note Pick the location of the sensor and of magnets Pick the location of th sensAr and of magnets Pick the location of the sensor and of magnets or targets if a different type of sensor is being or targets if a differeft typ of sensor is being or targets if a different type of sensor is being used on the rotating component used on the rotating component used on the rotating component Keep Specs Help Cancel Print Keon Samce Cancet Print Keep Specs Help Cancel Print Click on Read buttons and Click here to load final program will read signal currently calibration back into coming from this sensor DataMite Specs menu 172 C Performance Trends Inc 2000 Dyno Da
25. Channel 3 etc L lt DataMite Performance Trends 248 473 9230 LED flashes as signal comes Clear Memory into DataMite When engine running and on Channel 1 LED should flash For RPM Setup Mode and go back sensors LED lights as LED On Memory Full R rding M magnet passes sensor or Flash Nearly Full to Recording Mode brightens or dims with analog sensors Push Clear Memory button to bring out of 154 C Performance Trends Inc 2000 Figure 2 4 DataMite Recording Mode Dyno DataMite Analyzer Appendicies DataMite automatically goes to Recording Mode when power comes on Record LED light comes on Record LED is On when data is being recorded goes Off when not recording LED Flashes when data storage memory is 75 full and remains On when memory is full and no more data can be recorded Options The 4th channel and either of 2 wheel RPM channels can be converted to record other types of signals like temperature pressure position torque arm load etc Usually this requires the addition of a converter box and sensor See Figure A2 5 If you remove the cover of the DataMite box you will find 3 sets of jumper wires yellow blue and orange Whether these wires are connected or disconnected will set some options for the DataMite s operation See Figure A2 6 9 Record LED On Recording Flash Setup Mode L lt DataMite Performance Trends 248 473 92 Clear Memory LED
26. DDDD12 CFG x w DataMite Analyzer v2 0 SWO02 CFG x Back File Format View GraphType AddTest HistoryLog Multiple Tests Help Back Fie FormatNyiew GraphType AddTest HistoryLog Multiple Tests Help e OBI eA edee vessa e E NO eeel eA delie venesse Engine RPM D dddd12 all sw002_all 0 Engine RPM 6000 Engine RPM i i y 1 Dyno RPM 1 Dyno RPM 1 15 0 Time sec 3 i il 8 15 0 Time sec If the inductive pickup signal is too strong you wrap the spark plug wire too many times you may not be able to record Engine RPM at high RPM Engine RPM may drop in half or all the way to 0 RPM For other RPM signals using wheel speed sensors the problem may be e Unevenly spaced magnets will cause noisy or jumpy data not noise spikes See Appendix 2 about magnet spacing e The sensors may be getting hot If the problem appears Ok when you first start but get noisy when the engine heats up this is likely the problem You may have to position the wheel sensors away from the brakes or possibly the exhaust 161 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies e You may be specifying the wrong magnets in the Figure 3 3 Mounting Suggestion to DataMite Specs menu Avoid Vibration Problems e A magnet may have fallen off e There may be metal debris or shavings on the magnets e The sensor may be false triggering due to vibration See Bracket should Flat Washer i be as short as
27. DTIMDATA folder the entire Test Library This way you can avoid looking in each folder separately and can save rh are Click on this button to return to the File Open menu which will now only show files which fit the Filter Conditions Select And and the Test Files displayed must fit both conditions specified Select Or and the Test Files displayed can fit either of the conditions specified The settings in this screen will display all test files with the word BowTie or bowtie or BOWTIE somewhere in the test comments and with the word Johnson or johnson or JOHNSON somewhere in the Customer description a spec in the Engine Specs menu The Filter Feature is very useful for finding a specific test or to find all the tests which meet a certain set of conditions For example say you want to find a test that Operator Jack ran for Customer Smith on a Big Block Chevy engine Or say you want to check on all tests run with Weber carbs where Weber would be in the Carb description in the Engine Specs menu Or perhaps you want to find all Small Block Chevys that produced more than 700 HP In all these cases the filtering specs would allow you to find the test files 111 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output First you must select the condition you want to look for by clicking on the down arrow button on the This comment or spec box Your choice of this spec will determin
28. Drive 4 4 Drive For example say you have accidentally erased a Dyno Test File but rint have a paper report of that data There is no way to re enter the indows Printer Setup DataMite data You won t be able to recalculate that data correct the data to a new Weather Conditions compare new data to this old data etc nlock Program Options anster Program to Another Computer Exit Program Ctrl 2500 9 60 Click here to print a Test Summary Copying data to disk with Windows commands This method is the preferred method If you are not familiar with Windows commands have someone help you the first couple of times However this is the most reliable and most efficient way to back up your data Note Unless stated otherwise all mouse clicks are with the normal left button on the mouse To copy Entire DTMDATA Folder using Windows 95 98 or NT which contains all folders and test files in the Test Library Click on Start then Programs then Windows Explorer usually at the bottom of the list of programs You will obtain the Windows Explorer screen shown in Figure A4 2 Locate the PERFTRNS PTI folder may not be printed in capital letters on the left side of the Windows Explorer screen usually on the C drive Click on the sign to the left of it to display the contents of the PERFTRNS PTI folder You should now see the DTM20 folder Click on the sign to the left of it to display the contents of the DTM20 folder You
29. Engine Torque 54 back up 165 167 168 Barometer 28 29 Barometric Pressure 28 Baseline 148 Basic Version 1 2 5 19 50 94 123 140 Block 34 35 85 111 112 147 Bore 16 34 63 64 Calcd gear ratio 85 calibrate 1 45 174 calibration 41 43 44 45 148 163 169 170 171 172 173 174 cam 1 19 33 36 43 148 Carb 37 111 CFM 147 Chamber CCs 64 Chamber CCs in Head 64 Clear Memory 119 124 154 159 176 clearance vol 64 Clearance Volume 64 Clutch Slip 85 163 Coastdown Data 52 85 color 1 Com Port 42 Comment 104 Comparison Graphs 136 Compression Ratio 9 35 63 64 Convert to Columns 89 copy 2 5 19 41 49 108 110 165 167 Corr Barometer Hg 28 Correct for Eng Inertia Effects 30 Correct To 30 Corrected flywheel torque 85 Corrected HP 143 Corrected Torque 8 17 25 129 140 142 148 correction 16 19 30 123 145 175 Correction Factor 6 2 16 30 35 142 Correction Factor SAE 30 Correction Factor Std Race Dyno 30 Crank Description 35 Crank Wt amp Descr 35 Current Readings 55 59 60 123 124 149 175 176 Current Test 8 12 18 19 25 45 53 71 72 75 76 94 109 114 120 122 123 126 127 135 167 Cursor 95 98 139 140 145 163 176 Customer 1 25 33 34 111 112 Data Name 42 45 121 DataMite 1 4 1 2 3 4 5 7 8 9 11 12 15 16 17 19 20 23 25 38 41 42 43 45 46 49 59 7
30. If you have more than 1 inertia wheel which you can add or remove from the system see the of Main Wheels spec below as this may influence your choice here of Main Wheels Pro version only Click on the down arrow button to select how many wheels you have installed for this run For most inertia dynos there is probably only 1 main wheel In this case you would always keep this set to 1 However some inertia dynos can have more than wheel so inertia can be increased or decreased depending on the engine power level being tested See Figure 2 21 for explanation Note that the program will just multiply the inertia of the Main Wheel specified by the of Main Wheels Therefore all additional Main Wheels must be exactly the same as the Main Wheel specs you have entered 51 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 21 Examples of Inertia Wheel Systems side view Sections in Main Wheel 3 Sections in Main Wheel 1 Main Wheels 1 Main Wheels 1 but could be 2 or 3 if other wheels were added Section 1 Main Section 2 Wheels Section 3 Since all Main Wheels must be the same if you say there are more than 1 call this sleeve a component like Misc Component A Its inertia will be part of the system no matter how many Main wheels are used Coastdown Data Pro version only In the Pro version you can also estimate the aerodynamic and bearing losses in the dyno for more ac
31. Lets say this was 1290 RPM 7 Note the time on the stopwatch at some RPM which is about 2 3rds of the RPM at which you started Lets say the dyno RPM dropped to 1010 RPM in 80 seconds 8 Stop the stopwatch at some RPM which is about 1 2 to 1 3rd of the RPM at which you started Lets say this was 755 RPM at 180 seconds that is 180 seconds after you started the stopwatch at 1290 RPM 9 Type in the results from the coastdown The results from this test are shown in Figure 4 3 Note that the HP losses calculated are typically less than 5 of the power levels the particular dyno is intended to absorb Note If you have not done a coastdown test on your dyno it is best to enter 0 for all 6 coastdown specs to cancel out this correction With all the dyno specs set to match your inertia dyno click on File then Save as Master Dyno Specs to save these changes Then click on Back to close the Dyno Specs menu You will probably be asked if you want to keep these changes for the current test YAM 925 Since they were not the Dyno specs for that test answer No Now when you start a New Test and download data from the DataMite these Master Dyno specs will be the ones used for determining the torque levels of the engine for various dyno wheel acceleration levels Notes to users of the Basic Dyno DataMite Analyzer You will notice that the additional inertia of the components the Pro version lets you include are only about 0 2 for this dyno
32. Performance Trends YAM 1000 CFG Iaf x k amp n Back Print Report Types File Help F1 la x j Operator Tom 5 19 pm 01 02 2000 PkTq 8 40 9250 2 047 Bore Fora Ch Send Cmnts Eng Con To 29 92 60 dy PkHP 15 69 10000 1 815 longer 5 97 cid 2 Cycle Customer Peterson Corr Factor 1 012 Stroke report it 7000 5 88 7 85 5 96 necessary 7500 6 37 9 14 6 45 to hee 8000 7 04 10 77 7 13 ana crag 8500 7 80 12 65 7 90 E 9000 8 31 Pk 14 28 ar o 8 29 15 05 8 39 view all 95005 10000 8 14 THs 8 24 results 10500 J7 14 94 59 14 11 Be Peaks 14 74 marked 14 86 6 57 with Pk 14 40 6 12 13 02 5 32 11 59 4 56 10 38 3 93 8 68 18 7 3 60 Averages shown on bottom line for rows which are marked with an asterisk Ast A E 8 BE a VS Aw AK 4 4 4 Sw BHOM 1205P Table 4 1 Average Performance for Exhaust Flex Lengths YAM 900 9 00 6 48 113 35 666 1370 Best 144 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Table 4 1 shows the average Corrected and Observed Torque and HP for the 5 different exhaust flex lengths The Corrected results agree well with the observed results indicating the data quality looks good and the correction factors appear correct The Table shows more conclusively what the graph tended to show The 9 50 flex was the best on average over the 8000 to 14000 RPM range Conclusions e Graphs allow you to compar
33. Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 6 Calculation Menus The following section explains the user input for specs listed with Clc buttons These specs are ones where you can simply enter a value or click on the Clec button and the program will present a menu of inputs which will calculate that particular parameter These menus are like computer scratch pads for calculating specs like Compression Ratio from other inputs Notes The starting values in each calculation menu are always blanked out Once enough specs have been entered the calculated value s at the top of the menu will be displayed This calculated value s will now be updated each time you change a spec If you want to use this calculated value click on Use Calc Value If the Figure 2 35 Typical Calculation Menu calculated value is within expected limits it will be loaded into the original menu If you click on Click on Clc button to bring up Calculation Menu IS DataMit w Engine Specs FORD 5 0L Cancel you will be returned to the F cel you will be returned tothe ipae original menu with t 1e original value EAO A E E IT unchanged Ifyou click on Help you l Engine Customer Stock 5 paH will be given a general explanation of pBFord0045 Total Chamber CCs i i i Short Block calculation menus and a page in ci E Gas this section for more info about the WPS 4 Stroke E Cha
34. RPM 1 Magnet Frequency Chnl 4 Not Being Used Com Port Click here to set the cylinders and engine type for accurate Engine RPM data See menu below Click here to set the magnets and sensor source for the other sensors See menu Tip Help Click on most anything in the Channel Settings grid to Click on the down arrow button to select the change it For Used you will toggle between Yes and type of DataMite you are using You choice No For Data Name and Sensor and Calibration you here will affect which specs are enabled or will be presented with new screens to change the disabled in this menu p15 current settings below Specs Menu for Other RPMs Pick Dyno RPM for Calib channel 2 and Other RPM Engine RPM Specs Menu For Briggs engine specify 2 cycle since it fires every revolution just like a 2 stroke engine Calib 1 Cylinder 2 Stroke Engine Specs Note Pick the cylinders in the engine and 2 or 4 stroke operation For special ignition systems like distributor less you may have to adjust these specs for accurate RPM readings Use Cale Value Help Cancel Print RPH Sensor Specs Sensor Magnets Chnl 2 Analog Sensor Specs Ist Value Engineering Units zm fist Value freq hz Read 2nd Yalue Engineering Units 2nd Value freq hz Read Note Pick the location of the sensor and
35. Specs Total Inertia based on the 1 wheel is usually accurate within 98 Outside Dia Width len Weight Ibs Material Inertiz Main Whe EEN Basic version still requires Other Specs G aksit different thickness in main wheel p xx ear Ratio for accurate Dyno Type Engine gear reduce 7 Clutch Slip calculation Total Gear Ratio Overview of Individual Inertia Wheel Dyno Components Basic Version For an Inertia Dyno Basic version simply enter the outside diameter and width of the inertia wheel Then select the material Steel or Aluminum and the Wheel Wt and Inertia of the system is calculated For Material you can also select Use Wt This choice then disables Width and enables Weight Now you can type in the weight directly and the Inertia is calculated 50 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Pro Version In the Pro version the process is the same except that you can identify many more components of the system You can also specify different sections of the Main Wheels like a wheel with a step thicker sections at certain diameters First select the Sections in the Main Wheel at the top of the screen If your wheel is of a constant thickness select 1 If you select more than 1 you will set the inside diameter of a larger section to the outer diameter of the smaller section Then select the Main Wheels installed in the system typically 1
36. Sprocket This is the number of teeth on the smaller drive sprocket on the engine or clutch for chain drive systems In almost all cases this number will be smaller than Teeth Dyno Sprocket Teeth Dyno Sprocket This is the number of teeth on the larger driven sprocket on the dyno for chain drive systems In almost all cases this number will be larger than Teeth Engine Sprocket 65 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 37 Calc Dew Point 2 8 3 Calc Dew Point deg F Depending on your choice of Method of Recording Weather Data you Calc Dew Point 65 2 will be entering either Dew Point or Relative Humidity in the Test Conditions menu This is the Calculation Menu you will get if you are Weather Inputs using Dew Point Know Relative Humidity Outside Air Temp deg F Outside Rel Humidity See Section 2 3 Test Conds menu to see why Dew Point is usually more accurate and less confusing than Relative Humidity for entering humidity information Dig Balls Femi deg E Wei Bub Temp dea E Use Calc Value Know Relative Humidity If you know the relative humidity of the air and the air temperature select Yes Otherwise select No to input Wet and Dry bulb temperatures from a psychrometer Depending on your choice the appropriate inputs are enabled Outside Air Temp deg F Is the outside air temperature when the relative humidity
37. These Conditions will search through the entire Test Library all folders in the DTMDATA folder for files matching these conditions and display them in a new screen From this screen you can also print the list This is the quickest way to see which folders may contain test files matching your conditions Tip When looking for a word the program doesn t care if it is in CAPITAL upper case or small lower case letters In Figure 3 32 above you are looking for the word BowTie in the test comments The program will display all files which have the word BowTie or the word BOWTIE or the word bowtie or the word BowTIE anywhere in the comments The program will not find files with the words Bow Tie with a space between Bow and Tie Therefore it may be smarter to just look for the word bow to avoid this problem Note however that if you do this the program will also find tests with the word elbow or crossbow for example in the test comments 112 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 3 History Log Pro Version Only Click on File then Open form History Log at the Main Screen to obtain the History Log shown below in Figure 3 33 This screen shows a summary of the results for the last 25 100 tests you have worked with started new opened graphed etc The number of tests in the log 25 100 is selectable in the Preferences menu at the Main Screen
38. Whe section 3 Main Sat IV yClude Brake o v Include Clutch E E i f I Include Misc Component A B 5 2 ae i i Inputs I Include Misc Component B SEN Chain Drive Oni I Include Mise Component C ak id T Include Misc Component D a Back File Torque Measurement Est Required Inertia Current Readings Help a Calc Gear Ratio Teeth Dyno Gear Total Inertia 72 24 Teeth Engine Sprocket Help Teeth Dyno Sprocket r Other Specs 230 100 755 The outside diameter sche hs 755 of a brake disk or f ear with a Primary gear drive Time sec 180 drum in inches P 51 between the engine and transmission Select Primary Ratio amp Chain Drive as the Type if you HP Loss 23 14 07 know the Primary Ratio Select Primary Gears amp a e I 5 Chain Drive if you know the Teeth on thi Dyno Type Engine gear reduce M Pana Goas E alaa Mesie Total Gear Ratio leara i Help Cancel Print Total system inertia Enter results from a coastdown test to estimate the frictional losses in the dyno and drive system Pro version only Click on the Clc button to bring up menu at right for calculating the total chain ratio 122 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 5 Current Readings Screen to Read Dyno RPM Coastdown Test w Current Readings Close back Options Help Although you pr
39. an existing file Figure A4 3 If it is it will ask you if the existing file or folder should be overwritten Be very careful when overwriting files as you may overwrite a new test file with data from an old test file of the same name Before restoring test files it is good practice to back up all test files first Then if you make a mistake and overwrite test files you didn t mean to you have your backup copies to restore the test files from Figure A 4 3 Windows Explorer Warnings when Overwriting Test Files Overwriting a Test File Overwriting an Entire Folder several files A z This folder already contains a file named Headnum pti Be very careful selecting Bg this option as several files Would you like to replace the existing file may be overwritten at once 2 ee Confirm Folder Repl modified on Wednesday May 19 1999 3 28 48 PM OMRE het ap ae with this one Ta This folder already cofttains a folder named Combo fee folder you are moving they will be replaced Do you still want to move modified on Tuesday August 31 1999 1 09 24 PM the folder 2 211KB If the files in the existing folder have the same name as files in the Yes to All No Cancel 168 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Appendix 5 Calibrating an Analog sensor An analog sensor is one that records a signal that can gradually and continually change In contrast a switch signal is either On or Off
40. and Connecting Rods No entry is required Crank Wt amp Descr Enter the weight of the crankshaft in lbs This specs is used only for correcting engine power for engine inertia effects See Correction Factor in Test Options Crank Description Type in most any comment to describe the crankshaft No entry is required Flywheel Wt amp Dia Enter the weight of the flywheel in lbs This specs is used only for correcting engine power for engine inertia effects See Correction Factor in Test Options Flywheel Diameter Enter the outside diameter of the flywheel in inches This specs is used only for correcting engine power for engine inertia effects See Correction Factor in Test Options 35 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Ignition Distributor Type in most any comment to describe the ignition distributor or ignition system No entry is required Spark Plugs Type in most any comment to describe the spark plugs No entry is required Gap Type in most any comment to describe the spark plug gap generally a number in thousandths of an inch like 035 No entry is required Timing Type in most any comment to describe the ignition timing No entry is required Heads amp Cam Head s Type in most any comment to describe the cylinder heads No entry is required Cam Type in most any comment to describe the cam shaft or cam timing No entry is required Intake Valv
41. as the Sensor and Dyno Tq as the Sensor Type Dyno Torque is a special channel name reserved just for Absorber dynos You will notice the lower section called Analog Sensor Specs become enabled When you are done with the calibration be sure to set the Torque Measurement type in the Dyno Specs screen to Torque Arm 3 Obtain a Zero Reading A dyno torque calibration is best done with the engine not connected to the dyno Then with no calibration weights hung from the calibration torque arm the dyno should be at zero torque You might want to push down slightly on the calibration arm then pull up slightly to free up any stiction in the system Type in 0 for the Ist Value ft Ibs torque in the calibration screen Then click on the Read button for 1st Value Freq hz and the program will read the signal from the sensor with 0 torque It will store this reading as the 1st Value Freq hz where you can see it Figure A5 6 Calibration Menu for Torque Sensor Using Analog Converter A Choose Analog Converter as B Type in 0 torque for the 1st c Type in upscale torque for the Sensor and Dyno Tq as Sensor Value and click on Read button for 2nd Value and click on Read button Type program to read sensor at 0 torque for program to read sensor at the upscale torque Other RPM Specs xi Other RPM Specs Ea Other RPM Specs x Cai a ai arta rae 055 PoC RPM Sensor Specs RPM Sensor Specs RPM Sensor Specs Sensor
42. button then select Run Type in A SETUP and press lt enter gt or click on Yes e Follow the instructions of the Setup program e Then to run the program once it is installed e Click on Start e Click on Programs e Click on Performance Trends e Click on Dyno DataMite Analyzer Entering Registered Owner s Name The first time you run the Dyno DataMite Analyzer you will be asked to enter your name as the Registered Owner During this first session you can modify it until you are satisfied Once you accept the name the computer will generate a Registered Code based on the name To be eligible for Tech Help you will need both your registered name and code and to have sent in your registration card The name you enter should be very similar to the name you enter on the registration card Click on Help then About Dyno DataMite Analyzer at the Main Screen to review your name and code C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction Figure 1 2 Menu to Unlock Program Options Unlocking Program Options F3 Unlock Form The Dyno DataMite Analyzer is equipped with Code toExtendDemo 239235212 copy protection This ensures that legitimate Computer Hardware 842897 users do not have to cover the costs for unauthorized distribution of the program When Registered Name Joe Smith Cancel you first receive the program it is in demo Registered Code f 14666 mode In demo mode you can try either the
43. code number as shown in Figure 1 1 and call Performance Trends for a new Unlocking Code for that computer There may be a charge for additional computers Click on Help for more info on how you use this screen to unlock this program You may need to transfer the program to another computer like when you buy a new computer If so install the program on the new computer It will run for 10 days During that 10 days call when you can have your old computer up and running Go into the DataMite program click on File then Transfer Program to Another Computer Performance Trends will ask for some numbers from this screen and give you a code which will permanently turn the program Off on this old computer Then give Performance Trends the information for the new computer and they will give you a new unlocking code free C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction 1 3 A Word of Caution To install the DataMite data logger you must install some sensors on the dyno This is covered in Appendix 2 If you are not familiar with proper safety precautions when working on engines or rotating machinery HAVE A QUALIFIED MECHANIC OR ENGINE BUILDER HELP YOU Dynamometer testing can be dangerous Engines do fail possibly throwing shrapnel and burning fuel in all directions Take the proper precautions using shields and high quality fuel system components to minimize these dangers PLAN for the engine or even the
44. corrected by switching to new or higher spring tension points e Even though the Setup Mode seems to show engine RPM signals are entering the DataMite the source of the ignition signal may not be as correct as possible Refer to ignition signal sources described in Appendix 2 e Ifyou are using an Inductive Pickup with a wire tied to the spark plug wire the signal may be too strong or too weak See Figure A3 2 e On some applications where engine RPM can actually be quite variable from firing to firing like single cylinder engines at lower RPM or when running rough Performance Trends has a different DataMite chip which may correct this problem Contact Performance Trends for details e If your engine has an unusual ignition system very new production system distributorless etc there may not be a clean signal the DataMite can use NOTE THE STANDARD DATAMITE IS NOT DESIGNED TO WORK WITH MAGNETO OR UNEVEN FIRING IGNITION SYSTEMS Figure A3 2 Examples of Engine RPM Drop Out from Inductive Pickup Examples of drop outs shown here happen Engine RPM will drop to about 1 2 or 1 3 of what it to be on the decel after throttle closes and should be in signal to inductive pickup wire is weak spark voltage drops but it can occur on The fix is to wrap the inductive pickup wire around the accel also causing more severe the spark plug wire 1 to 2 turns for a stronger signal data calculation problems fe DataMite Analyzer v2 0
45. critical specs In the Pro version you have additional dyno specs for improving the accuracy of the data One of these options lets you load in data from a coastdown test of the dyno system to measure frictional losses in the system and make corrections for them An Inertia Dyno test is outlined as 6 basic steps Once a test is performed the data is downloaded to your computer from the DataMite by clicking on File then New get data from DataMite commands at the Main Screen You should check the raw recorded data for noise spikes and general data quality Once you are confident the raw data is good you can better trust the torque and HP numbers calculated and produce graphs and reports 133 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples 134 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Example 4 2 Analyzing Dyno Data Sometimes you may want to just see how an engine is running if the torque and HP peaks are where they should be and the engine is putting out the torque and HP it should This was outlined in Example 4 1 Other times you want to make more detailed analysis of a particular dyno run and compare the dyno run to other runs This could be to check the effects of a modification This process will be shown in this example We will look at the Yamaha 2 stroke engine tests in the Examples folder which came with the program These tests were run with a 1 4 inch chan
46. data reporting Lets say you specify reporting data at 250 RPM increments If your report includes 4500 RPM then all data within that 250 RPM increment from 4375 4625 RPM is averaged together to make the number you see reported at 4500 Use MM SS SS Time For Time reports select whether to Use MM SS SS time formatting If you select Yes then 122 333 seconds will be displayed as 2 02 33 minutes and seconds Include Averages Start Average At Stop Average At Select Yes for Include Averages to enable the Start and Stop Averages specs Enter the RPM or Time range you want for data averaging in the report In the report you will see an asterisks at the times or RPMs in this Average range and averages on the bottom row of the report for the data in the rows with these asterisks 84 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Report Types Pick Individual Items This report will include columns of data you have selected in the Report What section of the Reports menu They will be reported following the other specifications you have set in the Reports menu The Data Types are defined in Table 3 1 Figure 3 3 shows a report for the settings in the Report Menu shown in Figure 3 2 Table 3 1 Data Types for Reports Data Type Report Definition Column Name DataMite RPM sec means the engine s RPM increases 200 RPM in 1 second Dynamometer speed in revolutions per minute as recorded by what e
47. data should be analyzed and divided up into runs This is the same spec as the Test Type in the Test Conds menu Click on down arrow to select the type of test you ran This choice can have a large impact on what data is graphed and analyzed Your choices are basically e Dyno Run to measure torque and HP e Custom Test which would be anything else Notice that some of the choices are not used as they are used for Test Types in the vehicle versions of the software When you are ready to start the new test click on Start New Test at the top of the screen If some critical specs has not been entered the program may warn you and ask you for it at that time The program will fill in the Test Time and Date based on the computer s time and date This can be changed later by clicking on the Test Time Date at the Main Screen Important When you start a New Test the DataMite Specs and Dyno Specs will be from the current Master DataMite and Dyno Specs which should match your current DataMite and Dyno setup This will be the same no matter what previous test you are starting from 72 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 73 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 74 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 10 Edit Test File Options Figure 2 41 Edit Options at Main Screen Screen for 3 very important options Test Fi
48. dyno failing and you will cut down on the chances they ever will The Dyno DataMite Analyzer has features which estimate the engine s performance based dyno data some user input and assumptions These estimates can be used for analysis of engine performance on the race track or on the street However these assumptions like knowing the friction losses in the dyno system accurately knowing the inertia etc limit the accuracy of these estimates See other assumptions in this manual listed under Assumptions and Accuracy in the Index With any data acquisition and analysis the computer can help the user by automatically doing various calculations plotting the data easily etc However the computer is not thinking for you You the user are the key to properly understanding and using the data If confusing results are obtained take a minute to Plot the Raw RPM data and see if that looks correct See Appendix 3 on Troubleshooting If the Raw RPM data looks OK double check all your data input like Dyno Specs DataMite Setup Specs etc Refer back to this manual especially Appendix 3 Troubleshooting and Example 4 1 on dyno testing procedure Ask someone else skilled and experienced in the particular area Give the retailer or Performance Trends Inc s Tech Help Line a call for an explanation Also computer programs are written by people so it s always possible there may be an error in the calculations Your phone call may help us correct i
49. even the most minor noise spike can significantly affect calculated torque and HP e The acceleration test is happening too fast Generally you want a test to take at least 6 seconds for an acceleration To slow down the acceleration select a numerically lower Dyno Gear Ratio for example switch from a 6 00 ratio to 4 50 ratio e Erratic engine RPM signal especially if HP looks smooth and torque is jumpy e See if the trend repeats on a 2nd test If the hills and valleys keep occurring at the same RPM the jumps may be real e Try a higher filtering level Most torque and HP curves need Filtering set to at least Light some e Try graphing the torque and HP vs Time in seconds If it looks much more smooth then contact Performance Trends about this unusual data file If torque and HP look too low or too high e First check the other suggestions in this section RPM Data Good Calculated Data Bad e Double check all your DataMite and Dyno Specs entries Check Sections 2 5 and 2 6 e If Observed torque and HP look OK but Corrected look wrong check the Weather Specs in the Test Conds menu See Section 2 3 e Your engine may not be typical for example a very low powered engine with a very heavy engine flywheel and or crankshaft e Your dyno may have considerable frictional losses that you are not accounting for correctly See Coastdown Test in Example 4 1 e Your tests may be correct but the tests you are comparing to may be w
50. for an Elevation for the track since this is needed to make the Barometer Correction All these different inputs are explained below Barometric Pressure Corr Barometer Hg This input is used for either Radio TV Report with Rel Hum or Radio TV Report with Dew Pt It is the Corrected Barometric Pressure in inches of Mercury you will hear from most any TV or radio weather report This spec is disabled if you are using an Altimeter because the altimeter alone is measuring the air pressure Obs Barometer Hg This input is used for either Uncorr Baro with Rel Hum or Uncorr Baro with Dew Pt It is the actual or observed Barometric Pressure in inches of Mercury at the track These barometers measure the actual air pressure at the track and will read approximately 1 inches of mercury less than the barometric pressure you will hear from a TV or radio weather report for each 100 feet of elevation This spec is disabled if you are using an Altimeter because the altimeter alone is measuring the air pressure Air Temperature Air Temperature deg F Air temperature in degrees F of the air at the entrance to the air cleaner carb or throttle body Be careful not to get this too close to the carb if there is fuel stand off fuel mist spraying back out of the engine This fuel on any temperature measurement instrument will make the air temperature look much colder than the air actually is This spec is used for all Met
51. half or 2 cylinders half again but not 7 5 or 3 cylinders If you think the recorded RPM is off only a little bit you think you should read 5000 RPM but actually read 5200 RPM the DataMite is probably correct and your other measurement system is probably wrong The recorded and downloaded DataMite data is much faster responding and more accurate than typical tachometers 43 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Other RPM Calibrations Figure 2 16 Figure 2 16 Sensor and Calibration Screen Other RPM Channels Sensor Other RPM Specs Pick the source of the RPM data This can be very critical as for an Calib Other RPM 1 Magnet x 2 2 inertia dynamometer you must have 1 channel specified as the Dyno RPM Sensor Specs Wheel RPM This is the channel that is used for all inertia wheel ans acceleration measurements which is what the torque and HP numbers are Sensor Other RPM based on For an Absorber Dyno you must specify one of the channels as Magnets being for Dyno Tq See Section 2 6 Dyno Specs for details The choices for this sensor include Data Name Clutch RPH e Dyno Wheel RPM required for Inertia Dynos e Other RPM which could be some RPM on an engine pulley like water pump or supercharger RPM Analog Sensor Specs e Analog Converter required for Absorber Dynos with a channel set to Ist Value Engineering Units Dyno Tq 1st Value fr
52. humidity when the same air is heated to 100 degrees However the dew point remains at 36 degrees for both air temperatures Elevation Elevation ft The elevation of the track above sea level in feet This spec is only used if you are using a Corrected Barometer like from a TV or radio station weather report If the elevation is below sea level very unlikely enter a negative feet for this reading Altimeter The altitude in feet above sea level from an altimeter instrument The program assumes the altimeter is corrected to 29 92 This means on a standard 29 92 barometric pressure 60 deg day the altimeter would read 0 feet at sea level If the altimeter is reading feet below sea level enter a negative feet for this reading Notes on Weather Readings and Weather Stations Many dyno testers will use weather stations a collection of temperature humidity and barometric pressure measuring devices When using these instruments here are some things to keep in mind e Unless you are very close to sea level an actual observed or uncorrected barometer will usually read less than a TV or radio weather report barometer For elevations less than 5000 feet an uncorrected barometer should read approximately 0 1 Mercury less for each 100 feet of elevation above sea level For example if your barometer instrument is at 850 feet elevation and the closest weather station reports 30 46 barometric pressure your barometer sho
53. is due to magnets on the shaft not being exactly evenly spaced te DataMite Analyzer v2 0 YAM 930 CFG x Back File Format View GraphType AddTest HistoryLog Single Test Help la E aay Ee Ded edo TDs edeleen sca Dyno RPM vs Time inertia aii Omo RPM Dyno RPM vs Time 1600 0 1960 0 15200 1480 0 14400 14000 f 13800 1320 0 1280 0 12400 12000 11600 11200 7 128 Timo sec Errors Caused by Relatively Minor Noise Spike ta DataMite Analyzer v2 0 INERTIA9 CFG x Back File Format View GraphType AddTest HistoryLog Single Test Help la e elel Leo bee 1t ruven setscaes Corr Tq Corr HP vs RPM inertia 1 Corr Tq Corr HP 9 0 8 0 7 0 6 0 5 0 4 0 3 0 a a a oe hey ees oe j 1 0 5 1600 2400 3200 4000 4800 5600 6400 7200 RPM Dyno RPM after program edit outs Noise spikes te DataMite Analyzer v2 0 INERTIA8 CFG Back File Format View GraphType AddTest HistoryLog Single Test Help lae elel Cede Dele belo Lz a ruvien set scateg Corr Tq Corr HP vs RPM inertias 1 Corr Tq 1 Corr HP 9 0 8 0 7 0 6 0 5 0 40 ee eee ere eee program edit outs noise spike 1 i 1 1 1 1 i 1 1 1 1 0 1 n 1 1600 2400 3200 4000 4800 5600 6400 7200 RPM C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 47 Example of Not Editing Out Noise Spikes Very Well Original Data with Noise Spikes Data After
54. is given here Click on a setting to change it or to bring up the menu where it can be changed in this case shown the Engine Specs menu If you want to Open a previously saved test you can click on File in the upper left corner then click on Open from all saved tests You will get a screen as shown in Figure 2 2 where you are presented with a list of saved tests in the Test Library Some tests are examples provided by Performance Trends As you run tests yourself and save the results you will add many 11 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions more tests to the library These saved files are useful for making comparisons in the future and can be used as test patterns or templates for new tests saving you considerable time by not having to type in specs which match a past test Figure 2 2 shows that the Test Library is divided into sections called Folders in Figure 2 2 to help organize a large number of Figure 2 2 Opening a Test File Open Test File tests For example all tests for the company ABC Engines could be saved under a section name of ABC ENG All 4 cylinder Ford tests could be saved 5 Tests in Library Chosen File yam 925 cfg under a section name of 4CYL FORD 1000 cf This will save considerable time and Erne te Yam100 0003 confusion when trying to located a Type of Run Meas Tq HP from Accel particular test in the future To look in Bore 2 047 Pk
55. menu printed on it with the required information written in This tells the computer the sensor output at 2 conditions e Perform a calibration A calibration is the process where you set the sensor to 2 known conditions positions temperatures etc and let the computer read the sensor output at these 2 conditions You can click on the Read buttons to have the DataMite actually read the sensor values for these 2 conditions 1st Value 1 0 volts 0 deg The process of actually performing a calibration is somewhat involved and is outlined in Appendix 5 Calibrating an Analog Sensor Menu Commands Back Simply closes this menu and returns you to the Main Screen If you made changes to these specs you will be asked if you want to keep them for the current test If you answer Yes the results of the current test may be changed based on these changes This is good if you are correcting a mistake If you answer Yes you will also be asked if these changes should be saved to the Master DataMite specs Only answer Yes if all the current settings in this screen match the current settings sensors and calibrations of the DataMite right now and for the near future Remember that the Master DataMite specs will be used for the next test you download from the DataMite 45 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions File Open Master DataMite Specs Click on File then Open Master DataMite Spe
56. not as critical as for graphs Lets say you specify reporting data at 250 RPM increments If your report includes 4500 RPM then all data within that 250 RPM increment from 4375 4625 RPM is averaged together to make the number you see reported at 4500 This averaging process is much the same as filtering Range of Data Starting Time or RPM Is the first or lowest time or RPM for the report If you have selected a Time Report If you have selected All Data for What to Report then this is the time after the start of first data the DataMite recorded If you have selected Just Power Run 1 for What to Report then this is the time after the start of what the program saw as being the start of the first dyno power run If you have selected an RPM Report Your only choice for What to Report is one of the power runs This is the lowest RPM or starting RPM for the report To be sure that all data is reported for a particular run enter 0 for Starting RPM or Time and a number much larger than possible for the Ending RPM or Time something like 30000 Ending Time or RPM Is the last time or highest RPM for the report See Starting Time or RPM above Time Increment or RPM Increment Is the step size between report times or RPMs for the report See Starting Time or RPM above The smaller this number the longer and more detailed the report To report RPM data at every 250 RPM say at 2500 2750 3000 etc enter 250 for the RPM increment Note on
57. run by warming up the engine ideally to exactly the same temperatures coolant temp oil temp head temp etc for each run e You will probably want some type of tachometer for watching Engine RPM If you do not have an external tach you can use the DataMite s Current Readings screen shown in Figure 4 5 This is possible by clicking on File then New get data from DataMite to open the New Test screen Then click on Current Readings at the top of that screen Note It is recommended you use screen only if you have protected your computer s serial port with Performance Trends optical isolation system Otherwise it is possible for stray high voltage ignitions signals to pass back through the DataMite and destroy your computer s serial port Dyno Test Procedure Figure 4 6 Basic Test Procedure for Inertia Dyno 1 Power up 2 Start 3 Press 4 Open 5 Close 6 Press DataMite and press Engine Record throttle to throttle at Record Clear Memory warm up Button to start test we end of Button to button Wait for start test stop press Record to l pause DataMite Engine Record LED goes RPM _ Dyno run out Engine starts goes from accelerating here to here Record LED to stop recording DataMite Flashing Then data recording Engine decelerates coasts down 1 Power up the DataMite When the LED by the yellow Record bottom stops flashing press the red Clear Memory button to erase the D
58. system This is usually the case that the main large diameter wheel is where almost all the inertia is concentrated Therefore there is usually little error with the Basic version when you can t include these components The same is somewhat true with the coastdown data for correcting for frictional losses However it this case at 1290 RPM the Pro version would report a number 22 HP higher since the coastdown test is saying there is a 22 HP loss in the system the inertia wheel does not see at 1290 RPM These losses can be significant and make the Pro version more accurate if the coastdown test is done carefully 123 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Running a Dyno Test You have now done the preliminary work which checks that the DataMite seems to be working well and have setup the software s Master DataMite and Master Dyno specs to correctly match your DataMite and Dyno These initial settings are checks are only done for your first dyno test Now you can actually start recording engine data The first tests you run will be basically for practice Do not expect them to be exactly correct because you will forget something etc An inertia dyno test run is fairly simple to do Here are some tips before you start e The DataMite program is actually smart enough to find your dyno tests in your recorded data The program wants to see some data before and after the actual dyno test e The test is
59. tests to display Test Library shown here Click on File then Save or Save As to save current test and specs to the Test Library Total Tests in Library under this Folder IZS DataMite Data Analyzer v2 0 Perfe mance Trends PAR008 CFG Name of chosen Test Fil Edit Graph Report Tes x Engine DataMite Dyno Preferences He currently highlighted in Test List Oper est Fil Test amp Eng soli se Bac Click and drag slide 2047 Bore 25 Tests in Library ile par608 bar to view all Tests in list fi 815 Strok 3 Preview of Test g 97 cid 20 5 386 Con Fe Hater ae speared E Single click on a Test Pk HP 25 52 to choose it for Test Data Pk HP RPM 12000 preview Double click Date to immediately open it Tests can be saved under various categories folders to help you organize List All Files by File N large s of tests Lis iles by File Name Click ditt i O List by File Name include Eng Folders ick on a differen List by Eng include File Name ee name Nene amda different Folder i i Files Not Filtered all files listed name to display all ie of Test the tests saved 0 Filt Ad z under that Folder displayed The name Open bilan Name Folder was called ancel Help Delete ikrause2 Track in the DOS a version but can be changed in the Click here to Preferences menu to delete the most any word chosen Test Click here to bring up Click here to bring up the Fil
60. the Correct Torque Measurement Type for an Absorber Dyno Click on Torque Measurement and select Torque Arm as the type for an Absorber Dyno in the Dyno Specs menu f Inertia Dyno Specs Back File Torqu Measurement Current Readings Help Torque fertia and Acceleration The torque Y orque Arm aite specs menu Click on DataMite at the top of the Main Screen Then pick the cl Hydraulic Pump Pressure que by click on the Sensor and Calibration for the appropriate channel At the calibra PENT PICK A emer as the Sensor then Dyno Torque as the Sensor Type Then enter in the Sensor Specs to calibrate this channel for reading torque Torque Channel is currently NOT SET Other Specs Help f The inside diameter of Main Shaft in inches Unless using a hollow Joe shaft this will be zero 0 p 51 Total Gear Ratio cite 173 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Notes Other sensors are calibrated much the same as the dyno torque sensor However the process is not quite as complicated or critical because torque is such a critical measurement For example To calibrate a throttle position sensor With the throttle closed type in 0 and click on the Read button for the Ist Value Then open the throttle fully type in 90 degrees or possibly 85 degrees would be more exact and click on the Read button for the 2nd Value Click on Keep Specs and you re done To calibrate a pressur
61. typical Dyno DataMite Analyzer File Save menu where you can save the current set of Engine Specs and Engine Comments under a name of your choosing This name then appears at the top of the Engine Specs menu This name should not be confused with the Test File Name which appears at the top of the Main Screen The Test File includes all the Engine Specs and Test Data and therefore includes the Engine Name Print lets you print this screen Windows Printer Setup lets you change printer selection paper orientation etc Help brings up a series of help screens on the Engine Specs menu C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 39 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 40 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 5 DataMite Specs The DataMite menu tells the program what type of DataMite you have what sensors you are using and how the sensors are calibrated The entries in this screen are critical to accurately recording data Figure 2 12 Typical Note on Master DataMite Specs Master DataMite Specs Settings DO NOT Match the Master DataMite Specs These DataMite specs were used for the current test A critical concept for DataMite Specs is the idea of the Master DataMite Specs When TESTCH4 CFG you download data from the DataMite you are using a particular DataMite Setup with certain sensors and calibrations A ca
62. you keep banging your knee into it You will also need a known weight that will put you in the upper end of the torque range you will be measuring For example if you want to measure up to 100 ft lbs of torque and the Torque Arm of your calibration arm is 15 long out from the center of the dyno you would need a weight of about 80 Ibs Required Calibration Weight Desired Torque Calibration Torque Arm in Feet 170 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies From the example above Required Calibration Weight _ 100 100 _ 100 80Ibs 15 inches 15 12 1 25 feet This calibration weight can be most anything without moving parts that will hang straight down without moving that you can weight to get its exact weight This could be a compact chunk of metal an engine crank damper with a hole on 1 edge so it hangs steady etc Be sure to include the weight of the hanger in the calibration weight Do not try to obtain some exact weight which produces some even amount of torque In the example above a weight of 77 4 lbs would produce just as accurate a calibration as one that was exactly 80 0 lbs The 77 4 lb weight would produce a torque of 96 75 ft lbs Since you tell the program the exact torque 96 75 is a perfectly accurate answer Calibration Procedure 1 Turn on the DataMite to Read the Torque Sensor Channel This procedure assumes you have installed the load cell or pressure sensor which will read the
63. 00 10000 12000 14000 16000 RPM from 7000 to 15000 RPM The 9 75 flex shows a sharp rise then fall in torque and HP For most engines this would a clear indication that something unusual happened A quick up then down or down then up as shown here in the curves usually indicates a bad data point However on this highly tuned 2 stroke engine this may be real during the test However for this highly tuned 2 stroke engine this may be real A highly tuned engine is one which takes strong advantage of the pulses in the intake and exhaust tract These engines are prone to producing peaks and valleys in the power curves If time would have allowed this 9 75 flex test would have been a good test to repeat When unusual results are obtained the best check is to repeat the test If the trend repeats it probably is real Although the 9 75 test should have been repeated another way to check its validity is to check if its trends fall in line with other modifications In the Basic version you can only compare 2 tests In the Pro version you can compare many more The limit is determined by how many data types you want to graph To add more graphs click on the Add Test command and pick the other test run in this series 9 50 9 25 and 9 00 exhaust flex You would obtain a graph as shown in Figure 4 32 showing all 5 tests 140 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure
64. 1 75 76 77 81 84 85 89 103 107 108 110 111 119 120 121 122 123 124 125 126 128 129 133 136 147 149 150 151 152 153 154 155 159 160 161 162 163 165 167 169 170 171 173 175 176 DataMite ii 41 42 DataMite Specs 20 41 42 46 71 103 121 126 150 162 171 173 date 16 72 128 165 167 delete 34 75 76 108 113 Delete Beginning or End of File 75 76 Demo 2 5 8 19 Desired Accel Time 55 Dew Point 28 29 66 67 Disk 167 Display Run Summary 23 Distributor 36 DOS 12 108 110 Dry Bulb Temp 66 67 Dyno Conditions 29 Dyno Specs 3 12 20 44 49 50 51 53 55 71 85 103 110 122 123 126 163 172 175 176 Edit 8 15 23 75 76 77 96 99 115 136 160 Edit Out Noise Spikes 77 Elevation 28 29 Email 1 3 Engine 24 33 34 72 115 128 Engine Accel 85 Engine Comments 38 Engine File 34 38 108 Engine Inertia 30 Engine RPM 43 44 54 55 59 76 77 85 119 124 128 129 130 136 150 152 154 157 159 161 162 163 Engine Specs 6 9 12 13 16 19 33 34 38 72 85 103 107 110 111 126 147 Engine Type 43 162 Engineering Units 45 179 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Error 160 errors 43 51 71 78 128 148 162 Est Required Inertia 54 file 2 5 8 9 12 18 25 34 42 72 75 76 77 89 94 108 109 110 113 114 115 125 127 163 167 168
65. 4 Pick Individual Items 83 85 86 piston 64 Piston amp Rods 35 Pk HP 16 Pk Tq 16 Port Volume 36 37 Preferences 6 8 12 16 17 18 20 23 72 104 112 113 115 128 129 Print 46 53 103 104 112 114 130 165 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Print List of All Files Fitting These Conditions 112 Printer 6 24 81 96 103 104 Printer Fonts 24 104 Pro Version 6 7 1 2 5 9 11 12 13 15 16 18 19 24 27 33 49 50 51 52 81 85 89 92 94 95 99 103 104 108 111 113 122 123 133 140 141 142 143 147 Program Title Comments 23 Quality Data 129 130 136 137 Range 60 84 144 Record 119 124 150 152 154 159 160 176 Redetermine Beg End of Runs 76 registered 3 2 4 5 19 Registered Owner 3 4 Relative Humidity 28 66 67 Remove Test 94 Repeatability 147 Report 7 19 27 28 83 84 85 86 89 92 103 104 143 144 Report Type 85 Require Engine for New Test 24 Required Inertia 54 Rocker Arm 36 37 Rocker Arm Ratio 36 37 Rod Length 35 RPM 1 3 8 15 16 17 25 42 43 44 49 52 54 55 59 65 76 77 83 84 85 92 119 121 123 124 128 129 130 131 136 140 142 143 144 145 148 149 150 151 152 154 155 157 159 160 161 162 163 169 175 176 RPM Accel Times 83 RPM sec 85 Runs Graph 115 Save 1 8 10 12 18 23 34 38 41 42 46 49 53 71 75
66. 4 32 Graph Comparing 5 Runs Pro version only DataMite Analyzer 2 0 YAM 1000 CFG Back File Format Yiew GraphType AddTest HistoryLog Single Test Help Sa a ae el leas Il s d orrection Factors Corr T Specify Scales axes yam 1000 1 shown below This Corr Tq lets you check that EUEN all tests you are yam 975 1 comparing are por E corrected to the same conditions yvam 950 1 and that the Corr Tq Corr HP Correction Factors themselves are not e z too unusual Corr HP indicating possible yam 900 1 errors entering Corr Ta weather conditions Corr HP Turn Cursor On Correction Factors for Current Tests Cor To 29 92 60 dy Cor Factor 1 012 YAM 1000 1 Cor To 29 92 60 dy Corr Factor 1 012 YAM 975 1 Cor To 29 92 60 dy Corr Factor 1 012 YAM 950 1 0 Cor To 29 92 60 dy Cor Factor 1 013 YAM 925 1 4000 6000 8000 10000 12000 14000 Corr To 29 92 60 dy Cor Factor 1 027 YAM 900 1 Figure 4 33 Graph of Figure 4 31 HP Only Heavy Filtering and Zoomed In on Peak HP w DataMite Analyzer 2 0 YAM 1000 CFG x Back File Format View GraphType AddTest HistoryLog Single Test Help Note that all runs have a dip right at the HP peak indicating the dip seen in Figure 4 25 for yam 1000 1 Corr HP the 9 75 flex is probably real vam 975 1 Corr HP yam 950 1 Before and after the HP peak where tuning effects are not as significant the curves are yam 900 1 very similar
67. 5 Ibs Stock Fuel Delivery Elec Fuel Injection M leave them blank Flywheel Wt amp Dia 8 Jibs im SFI System Stock 550 CFM T B Ignition Fuel Setting eae eta niyo AEA used to estimate Engine Distributor Stock TFI Manifold Cast aluminum 20 runners Inertia which can be used to Spark Plugs _ Headers Stock short tube headers estimate losses to accelerating engine inertia for Ean Timing aii Stock full exhaust some dyno tests See Test Help Conds Section 2 3 Type in most any comment to describe the exhaust system and mufflers if any No entry is required p xx Most specs in this screen are Engine Customer and Comments Engine Engine numbers can be critical for shops testing many engines The program keeps track of numbers so you don t assign duplicates or skip numbers Consistency of Engine number patterns also makes it easy to find engines in the Test Library If you click on the Engine spec the menu of Figure 2 11 is displayed This menu lets you pick a new engine 3 different ways 33 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 1 You can start a new Engine format if you select Yes for Enter a New Figure 2 41 Engine Menu Number Format For example say you currently are using Johnson0012 Assign Head Number xi as a Engine for 1 customer Johnson Now you have a new custome
68. 7 150 163 169 175 176 Inertia engine 1 35 85 180 Install 3 4 41 49 96 119 120 133 154 159 160 161 Just Power Run 83 84 92 Larger Font Print Size 104 Lash 37 Legend Graph 95 99 115 143 Length 35 144 173 Library 8 11 12 18 33 94 107 108 109 111 112 113 135 165 167 168 Magnets 44 149 150 159 Main Screen 6 2 4 5 7 8 11 12 15 16 17 18 19 20 23 25 38 45 53 71 72 75 81 83 91 94 108 109 112 113 120 121 125 128 129 130 133 136 143 165 167 Main Screen Filtering Level 25 Main Screen Graph Lines 25 Main Screen RPM Increment 25 Master DataMite Specs 41 42 46 Master Dyno Specs 49 53 123 Max Inertia Wheel RPM 54 Method of Recording Weather Data 27 66 67 Mufflers 38 Multiple Tests 94 143 Multiplier 44 New get data from DataMite 17 124 125 133 New Test 6 16 18 24 71 72 76 77 122 123 124 125 126 127 128 Noise 23 44 76 77 78 79 128 129 133 136 150 151 160 161 162 163 Obs Barometer Hg 28 Observed flywheel HP 85 Observed flywheel torque 85 Oil Temperature 30 Open 8 11 12 18 33 38 46 53 71 107 108 110 111 112 113 135 167 171 Open from all saved tests 11 18 33 108 113 135 Open from History Log 18 108 Open from Floppy Drive 18 Open Master DataMite Specs 46 Open Master Dyno Specs 53 Operator 16 72 111 112 127 Other RPM 4
69. 76 89 107 108 109 110 113 115 123 173 Save As 18 46 53 110 Save As Master DataMite Specs 46 Save As Master Dyno Specs 53 Save to Floppy Drive 18 Sections in Main Wheel 51 52 Sensor 43 44 45 121 150 169 171 172 173 Sensor and Calibration 43 44 121 173 Setup 3 4 41 49 96 119 120 133 154 159 160 161 Setup Mode 119 120 133 154 159 160 161 Shift 101 Show Files Only Fitting These Conditions 112 Spark Plugs 36 Starting Engine RPM 55 Std Graph Title Created in History Log 24 Stroke 16 19 34 35 43 63 Summary 17 23 130 131 132 165 Summary Graph 17 Tabs 15 Tabs dyno runs 15 Tech Help 3 4 Temperature 28 29 30 77 Test Comments 16 71 72 104 Test Conds 6 9 12 16 17 19 27 66 67 71 72 85 103 107 126 127 142 144 148 163 Test Correction 6 Test Data Grid 17 Test Folder Name in Program 25 test time 16 54 Time Align 101 138 140 145 Time or RPM Graph 92 Time or RPM Report 83 Time Date 72 128 Timing 36 torque 1 8 9 15 16 17 20 24 25 27 29 30 41 44 49 52 53 54 55 56 72 77 79 85 114 123 128 129 130 131 135 136 140 142 144 145 147 148 150 155 163 170 171 172 173 174 Torque Arm 55 56 170 172 173 Torque Measurement 53 55 172 173 Torque HP decimals 24 Total Gear Reduction 54 55 Tq 16 44 76 85 128 144 172 173 Transfer Program 2 Troubleshootin
70. Any specs not selected to Keep will be mostly blank when you start the New Test in Section 2 1 you enter a new Operator name of Jack 127 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples C aaa aaa EEEE E EEEEE LSE 3 Engine for New Test is critical for shops who use a engine numbering system Click on Assign to create a new Engine based on the last Engine assigned incremented up by 1 or to start with a new type of Engine Through the Engine Menu discussed in Section 2 4 you enter a new Engine of STKBGS 0001 If you do not want to be forced into a certain format for entering engine numbers or want to be able to leave the Engine Number blank choose that Preference in the Preferences menu described in Section 2 2 4 Folder Name for New Test is the folder in the DTMDATA folder where the test will be saved The program may not be using the name folder for spec but whatever word you have assigned in the Preferences menu The folder name Examples is reserved for Performance Trends example tests supplied with the program and can not be used for your tests By clicking on Add New you use the new folder of BRIGGS This folder will be used for you will use for all Briggs Tests 5 As you should do for most all inertia dyno tests you choose the Data Type Measure Tq HP from Accel The New Test screen should now look like Figure 4 11 When you are ready to start downloading data from th
71. Chapter 4 Examples Figures 4 25 through 4 29 show how you can use graph features like Time Aligning Zooming and the Cursor to check various performance characteristics However the most common way to check performance between to engine conditions is the graph the Corrected Torque and HP vs RPM Figure 4 30 the Graph Menu specs to produce the graph shown in Figure 4 31 Figure 4 30 Graph Specs Menu Graph Name x Engine Accel RPM sec Dyno wheel RPM Calcd gear ratio Figure 4 31 Corrected Torque and HP Comparison Graph The 9 75 flex shows higher HP and torque throughout most of the RPM range which agrees with the acceleration results that the 9 75 flex was at a higher RPM at the end of the acceleration Clutch conyverter slip Observed flywheel torque Observed flywheel HP Corrected flywheel torque Corrected flywheel HP Other Graph Specs Time or RPM Graph RPM What to Graph Just Power Run 1 M Filtering w DataMite Analyzer 2 0 YAM 1000 CFG x Back File Format View GraphType AddTest History Log Single Test Help dale elele Led oP edelt elese scaieg Corr Tq Corr HP vs RPM yam 1000 1 Light some Notes Data Selected to Graph 4 types max Corrected flywheel torque Corrected flywheel HP Make Graph Help Cancel Print Figure 4 31 shows 2 main things 1 The torque and HP for the 9 75 flex is higher over most of the RPM range 0 4000 6000 80
72. Dyno DataMite Analyzer V2 0 for Windows User s Manual Performance Trends Inc Box 530164 Livonia MI 48152 248 473 9230 Fax 248 442 7750 Website www performancetrends com Email feedback performancetrends com Performance Trends Inc PO Box 530164 Livonia MI 48152 Tech Assistance for Registered Owners 248 473 9230 Fax 248 442 7750 Email feedback performancetrends com Website tips correspond with other users download demos update schedule etc www performancetrends com Copyright Notice Copyright C 2000 PERFORMANCE TRENDS INC All Rights Reserved These software programs and user s manual are reserved by PERFORMANCE TRENDS INC and are intended for the use of the original owner only Copying or duplicating these products except for the personal use of the original owner is a violation of U S Copyright Law and is hereby expressly forbidden Portions Copyright C Microsoft Corp 1982 1987 All Rights Reserved International Business Machines Corp makes no warranties either expressed or implied regarding the enclosed computer package its merchantability or its fitness for any particular purpose IBM PC XT and AT are registered trademarks of International Business Machines Corp Windows is a registered trademark of Microsoft Corp DISCLAIMER Of WARRANTIES THE SOFTWARE PROVIDED HEREUNDER IS LICENSED AS IS WITHOUT ANY WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY WARRANTIES FOR MERCHANTABIL
73. Editing Out 32 Noise Spikes many Noise Spikes remain too many for accurate torque and HP calculations Back File Format View GraphType AddTest HistoryLog Single Test Help Back File Format View GraphType AddTest HistoryLog Single Test Help al el Talla elel eel edeli ty ruview sescsed le E Lala elelee eel bol eT a ruview sescatey Engine RPM aie REM vs Lime 0 all Engine RPM ehz RPM vs Time 0 all gt Engine RPM p P Engine RPM 1 Ch2 RPM i i i 1 Ch2 RPM i i i i i i i 1 e i i i i i This reading shown by the Die apike is oy wrong The readings next to the Noise Spike are a good approxima tion of the real reading a 25 0 30 0 35 0 Time sec al H 25 0 30 0 35 0 Time sec If many Noise Spikes occur close together the program can not accurately determine if a spike is noise or real data and leaves it in 79 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 80 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output The Dyno DataMite Analyzer provides several ways to view and output the test results including Reports of tabular data displayed on the screen ASCII files for importing results to other software packages Pro version only High resolution graphs Printer output of reports or graphs History Log Pro version only Data Libraries for recording test data and sets of engine specs in the Pro version for later
74. Figure 3 31 xdrag pti cam anzr camdata E examples From here you can access most and file on the computer on most any disk drive List files of type All Files Tips to Advanced Users DataMite test files actually consist of 3 files 1 DAT file which is the recorded DataMite data 2 CFG file which is the configuration file including DataMite specs Dyno Specs Engine Specs etc 3 LAP file which is the Lap or Run file identifying where the beginning and end of each dyno run is in the DAT file If you want to copy a DataMite test from one computer to another you must copy all 3 files This is done automatically whenever the program saves or opens a file or when you used the Save to Floppy and Open From Floppy commands discussed on page 18 If you have a file from another computer from another disk like a floppy or folder you can simply copy it into any folder in the DTMDATA folder and it will be found by the DataMite program This can be done with a program like File Manager Windows 3 1 or Windows Explorer Windows 95 98 You can also create new folders directories in the DTIMDATA folder and these will also be used by the DataMite program 110 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 3 6 Filter Test Files Pro Version Only The Dyno DataMite Analyzer has a powerful way to search for tests in the Test Library called the Filter Option Click on the Filter bu
75. ITY OR FITNESS FOR A PARTICULAR PURPOSE NO ORAL OR WRITTEN STATEMENTS REPRESENTATIONS OR OTHER AFFIRMATION Of FACT INCLUDING BUT NOT LIMITED TO STATEMENTS REGARDING CAPABILITY CAPACITY SUITABILITY FOR USE OR PERFORMANCE Of SOFTWARE SHALL BE RELIED UPON BY USER OR BE DEEMED TO BE A WARRANTY OR REPRESENTATION BY PERFORMANCE TRENDS INC FOR ANY PURPOSE OR GIVE RISE TO ANY LIABILITY Of OBLIGATION Of PERFORMANCE TRENDS INC WHATSOEVER USER ACCEPTS ALL RESPONSIBILITY FOR SELECTING THE SOFTWARE TO MEET USER NEEDS OR SPECIFIC PURPOSES PERFORMANCE TRENDS INC IS UNDER NO OBLIGATION TO FURNISH USER UPDATES OR ENHANCEMENTS EVEN IF FURNISHED TO OTHER USERS LIMITATION Of LIABILITY If at the time of delivery to the original User only there are any defects in the media on which the Software is provided User s sole and exclusive remedy shall be the replacement of any media returned to Performance Trends Inc within 90 days of the receipt of the Software by User or at Performance Trends Inc s sole option a refund of the License fees paid to Performance Trends Inc by User IN NO EVENT SHALL PERFORMANCE TRENDS INC OR THIRD PARTIES WHO HAVE RIGHTS IN THE SOFTWARE BE LIABLE TO USER FOR LOSS Of PROFITS INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF PERFORMANCE TRENDS INC IS AWARE Of THE POSSIBILITY Of SUCH DAMAGES Continued on next page IN THE EVENT ANY REMEDY HEREUNDER FAILS Of ITS ESSENTIAL PURPOSE OR IN ANY OTHER EVENT
76. In most situations this entry is for information only and no entry is required If you are measuring fuel flow from a volume flow meter this value will be used to obtain 1b min fuel flow Fuel Enter most any description of the fuel being used octane vapor pressure fuel brand etc This entry is for information only No entry is required Correction Factor Correct To Click on down arrow to select the type of correction factor you want to use for corrected Torque and HP Std Race Dyno corrects to 29 92 Hg 60 deg F dry air which is typical of most aftermarket and race dyno runs you will see in the United States Std SAE corrects to 29 6 Hg 77 deg F air with 49 deg F dew point humidity and is what most new car engines are rated to Correct for Eng Inertia Effects Click on down arrow to select if you want all torque and HP numbers corrected for the engine s inertia effects when the engine is accelerating Just as the inertia dyno absorbs torque during an acceleration the engine s internal inertia crank engine flywheel etc absorbs torque which does not pass through to the dyno This correction if set to Yes attempts to produce torque and HP numbers you would see during a steady state or step test 30 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 31 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 32 C Performance Trends Inc 2000 Dyno DataMite Analyze
77. Mite Options Inductive Pickup and wiring harness for measuring engine RPM on single cylinder Briggs or other cart engines 110 VAC to 12 VDC power supply so dyno system can be powered from AC wall outlet It is recommended you power your DataMite from the same power as you power your computer for example from the same power strip ideally with surge protection Optical isolation connector for the COM port This is good protection for your computer against high voltage spikes from the engine getting back through the DataMite to your computer s COM port This can happen any time you are running the engine and have the serial cable attached to the COM port This is something you may often want to do to watch the Current Readings In addition you may need Epoxy or some other method of mounting magnets to the wheels or driveshafts Heavy metal strips to build brackets to mount the RPM sensors to monitor the magnets Shrink tubing solder soldering iron wire terminals etc if you are going to shorten lengthen or change the wiring harness Optional power switch to cut power to the DataMite The hardware instructions given here are very general and describe the overall DataMite system Most DataMite options come with their own installation and instruction sheet 149 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 2 Determine Signals to Record The system is designed to record engine RPM on channel 1 However
78. On Memory Full O Flash Nearly Full Figure 2 5 Analog DataMite Module T harness if required Standard Harness 5 Push Record button to pause recording data Record LED goes Off Push Record button again to resume data recording Record LED comes back On 30 I Caution Pushing Clear Memory button erases all data stored in DataMite O Converter Installation Converter box required for most sensors connects to T harness or 4th channel On Off type sensors connect only to channel 3 and do not require converter box Sensor epn X 4 4 pin DTM LD or similar type lead Some sensors come standard with leads and connector 4th Channel new harnesses only 9 6 16 volt power Ground Ignition signal for RPM Front wheel RPM Rear wheel or driveshaft RPM C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Figure A2 6 Hardware Options 156 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Figure A2 7 Alternate Sources for Ignition Signal for Engine RPM NOTE Attach yellow wire where Figure says Red Clip 157 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 158 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Appendix 3 Troubleshooting Data Recording Should you encounter problems recording data or obtain unusual results from your recorded data check the suggestions below No Data Recorded Fir
79. PERFORMANCE TRENDS INC S LIABILITY HEREUNDER SHALL NOT EXCEED ANY AMOUNTS PAID BY USER TO PERFORMANCE TRENDS INC UNDER THIS AGREEMENT Some states do not allow the limitation or exclusion of liability for incidental or consequential damages and some states do not allow the exclusion of implied warranties so the above limitations or exclusions may not apply to you No action regardless of form arising out of any claimed breach of this agreement or performance under this agreement may be brought by either party more than one year after the affected party learns of the cause of action Refer to diskette envelope for full license agreement The DataMite Analyzer makes calculations based on equations and data found in various published and heretofore reliable documents The program is designed for use by skilled professionals experienced with engines and Tests The following processes are hazardous particularly if done by an unskilled or inexperienced user Obtaining data to input to the program Interpreting the program s results Before making measurements of or modifications to any Test engine or driving situation DO NOT FAIL TO Regard the safety consequences Consult with a skilled and cautious professional Read the entire user s manual Obey all federal state amp local laws Respect the rights and safety of others Acknowledgment Tom Krause of TDK Motorsports has been instrumental in bringing modern accurate inertia
80. RPM 9 Type in the results from the coastdown into the Dyno Specs screen shown in Figure A6 1 Note that the HP losses calculated are typically less than 5 of the power levels the particular dyno is intended to absorb Recorded Data Procedure The Recorded Data procedure is the same as the Manual procedure shown above except you record the data with the DataMite 1 Start the DataMite recording data by powering up the DataMite then pressing the Clear Memory button erasing any current data in the DataMite Then press the Record button to pause the DataMite from recording The Record LED should go off to indicate the DataMite is NOT recording 2 Warm up your dyno system spinning the wheel to the approximate bearing temperatures you think you will see during your dyno testing Accelerate the inertia wheel to the highest safe RPM you will encounter during your dyno testing Press the Record button to start the DataMite recording data 5 Download this data as you would any dyno test by clicking on File the New get DataMite data You may want to call this Data Type a Custom but this is not critical 6 Graph the Dyno RPM for this coastdown test as shown in Figure A6 3 Use the cursor to find 3 points on this curve See Section 3 3 on using the Graph Cursor Load these 3 RPMs and their times into the Dyno Specs screen shown in Figure A6 1 Note that the HP losses calculated are typically less than 5 of the power levels the particular dyno i
81. RPM for the current run of the current test file displayed on the Main Screen Main Screen RPM Increment This spec lets you pick how often you want RPM data reported on the Main Screen much like the similar spec for Reports The smaller the number the more data which is reported the longer the list of torque and HP data and the jumpier less smooth the Main Screen graph Main Screen Filtering Level This spec lets you pick how much filtering smoothing the program does to the RPM data reported on the Main Screen much like the similar spec for Reports The higher the filtering the less jumpy more smooth the Main Screen graphs Test Folder Name in Program The Dyno DataMite Analyzer saves tests under different folders directories under the main folder DTIMDATA Some users may prefer to have the Folder be called EngFamily or Customer depending how they choose to organize their tests Your entry here of most any text up to 9 characters is what the program will use to call the different folders where test files are stored Note In the DOS version 1 x these folders were called tracks If you want to match the wording used in the DOS version 2 1 change this word to Track 25 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 26 C Performance Trends Inc 2000 2 3 Test Conds The Test Conds let you record weather conditions on which corrected torque and HP numbers are base
82. Section 2 2 If you click on a graph line in the Summary Graph that particular data point will be highlighted and displayed in the Test Data Grid This is a quick way to find data points which may look unusual or be important 2 1 4 Test Data Grid Point The point column simply numbers the rows of data and is used by the program to identify a row of data for messages RPM Is the RPM for this row of data The increment of the RPMs can be selected in the Preferences Menu Section 2 2 Torque HP This is the corrected Torque and HP numbers for the corresponding RPM This data is corrected for weather conditions and for any inertia effects as indicated in the Test Conditions menu This number is averaged for all the RPM data which is closer to this RPM than the RPM above or below it For example if the RPMs are 5000 5250 5500 etc the torque and HP numbers given at 5250 RPM are for all RPMs from 5125 to 5375 RPM 2 1 5 Main Screen Commands The next section discusses some of the commands available at the top of the Main Screen Most will not be discussed here in detail as they are discussed in other sections of this manual File see Figure 2 6 for File Options New get data from DataMite Click on File then New to start a new test This process will walk you through some critical steps to preparing to download data from the DataMite You can select to keep certain data from the previous test like test comments engine s
83. See the sections later in this chapter for more details on individual menus 13 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 1 Main Screen Test Data Inputs The Main Screen is shown in Figure 2 4 and is designed to resemble a typical dyno printout and graph Like a dyno printout it shows the torque and HP obtained at a range or RPMs and a torque and HP vs RPM graph The Main Screen is made up of 5 basic sections as shown in Figure 2 4 These are discussed in the next 5 sections The rest of this section gives an overview of how the Main Screen is organized Figure 2 4 Main Screen Pro version 1 Click on these 5 Menu Commands of File Graph etc Tabs to switch These give you all the options to operate the between the program and change test data different runs of iA DataMite Data Analyzer v2 0 Performance Trends BECOOS CFG this particular test File Edit Graph Report TestConds Engine DataMjte Dyno Preferences Help file Run 1 2 Test amp Engine Test Comments Conditions 1 97 Bore 5 22 am 04 11 2000 Parilla TTZ summarizes reegtest b aseline 2 3 00 1 97 Stroke PkTq 13 42 10250 6ck cage with 013 reeds some critical test 6 00 cid 2 Cycle PkHP 26 51 10502 Help Click on one of the Tabs here to change to a different run specs and includes a 1 052 Corr Factor comments Test Data corr to
84. Some Inertia Dynos let you add or remove Main wheels as necessary to simulate different acceleration rates For other components which are part of the inertia wheel assembly click on the Check Box Then their input specs will appear and you can enter their specs similar to the Main Wheel It does not matter what you call a component If you have 2 brake components enter the measurements of 1 brake component as the Brake and the other component as a Misc Component You will see that for light components which have relatively small diameter they contribute little to the overall inertia of the dyno See the column called Total Therefore the measurements of these small components contributing less than 3 is not that critical For each component of the inertia wheel assembly its inertia is calculated and added to the total and its relative size is sketched in the layout in the lower right corner The sketch is not an exact drawing of your system It is meant only to show the relative size of the different components so you can see any obvious errors in your inputs Individual Inertia Dyno Specs Sections in Main Wheel Pro version only Click on the down arrow button of this spec to choose the number of sections in your main inertia wheel If your inertia wheel has a constant thickness choose 1 section If it has sections of different thicknesses then choose a number from 1 3 which best describes how many thicknesses there is See Figure 2 21
85. Specs Menu Figure 4 23 Graph Checking for Data Quality Click on Add Test to add a test Engine RPM for comparison DataMite Analyzer v2 0 YAM 1000 CFG Back File Format View GraphType AddTest HistoryLog Single Test Help lal El flay ee Vee el edeli e rutview set scaled Engine RPM Dyno RPM vs Time yam 1000 all Calcd gear ratio 000 Engine RPM Clutch converter slip 1 Dyno RPM x 10 Other Graph Specs Time or RPM Graph M as E Notes Data Selected to Graph 4 types max i y i i i i Engine RPM i ie TEETE AREY One minor noise spike in Engine RPM will not reduce the data quality significantly If this spike had been in Dyno RPM the data quality would Make Graph Help Cancel Print NOT be good a x 20 0 225 25 0 Time sec o Fred in Now add the test you want to compare this test to by clicking on Add Test in the Graph Screen See Figure 4 23 You will obtain a screen similar to Figure 4 21 on the previous page Select the YAM 975 CFG test which had a 9 3 4 inch exhaust flex You should now obtain a screen similar to that shown in Figure 4 24 The YAM 975 has nothing that looks like a noise spike so its data quality looks very good To illustrate some features of the graph screen lets say you wanted to compare these 2 conditions for acceleration rates In order to do this easily you would want to start the acceleration at the same RPM at the sa
86. Std Name to New or Blank Out New Name buttons Click here to close this menu and use Copy Std Name to New i A the New names you have entered Where New names have been left Copy All Std to New Names blank the Standard name will be used Use Std Titles Use New Titles Cancel Help 99 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Changing the scales Many times you may want to change the scale of the X or Y axis This may be to show an area in more detail or to match the scales of a previous graph The Pro has several ways to change the scales as shown in Figures 3 22 and 3 23 Figure 3 22 Changing Scales for the X or Y Axis Clicking on these buttons zooms in or zooms out on the graph either vertically or horizon Clicking on these buttons shifts the tally Hold down the shift key while clicking on graph left right up or down Hold down them and the graph moves farther each step the shift key while clicking on them and the graph moves farther each step Click here to restore auto scaling That is where the computer picks the scale to show all the graph in good detail You can use the mouse to yam 950 1 outline an area to be zoomed CorTa s i Corr HP in on Simply click on the mouse key in the upper left corner of the area then hold the key down and drag the mouse to the lower right corner of the desired area A box will be drawn as shown When you release the mouse key
87. Std Race Dyno 29 92 60 dec ng Inertia Effects ye w Click on down rrow to select the type of test you ran This choick can have a large impact on what dat is graphed land analyzed p 50 Chapter 4 Examples If you are going to compare and analyze Corrected torque and HP then it is critical you enter accurate weather conditions for each test Assume you have a portable weather station in your shop which gives Barometer in inches of Mercury and dew point For best accuracy the air temperature you enter should be the temperature right before the air cleaner or carb However be sure the temp sensor is not getting wet from fuel stand off from the carb Once you set these Correction Factor specs it is best to not change them Otherwise it will be difficult to compare different tests or graphs To Correct for Eng Inertia Effects you need reasonably accurate Briggs engine Short Block Specs to estimate the Engine s Inertia There are five critical specs listed separately at the top Most of these must be filled out before you can start the new test The program usually fills them in with default values based on the current test Figure 4 11 New Test Menu for Starting This New Test Click Here to Start the New Test Ste ting a New Test Start New Test Cancel don t start new test Current Readings Help FileName Operator p Engine it Folder for New for New Pick ENS _Assion Name
88. The process of telling the program these 2 combinations is called calibrating the sensor This is done in the DataMite screen as described in Section 2 5 In the standard 4 channel DataMite analog sensor signals must be conditioned by an __ 1st Value Analog Converter which converts the analog 1 0 volts 0 lbs signal into a frequency similar to an RPM signal However as far as you the user are concerned it functions just like an Analog Sensor shown in Figure A5 1 169 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Example of Calibrating the Torque Arm of an Absorber Dyno An absorber dyno is described in Section 2 6 1 It measures torque through a load sensor on its torque arm The torque is the combination of the load at the torque arm times the length of the torque arm See Figure A5 2 As with any calibration you must put at least 2 known inputs into the sensor and then see how the DataMite reads the signal from the sensor These are the 2 combinations mentioned earlier For the torque arm load one input is easy That is zero torque With the engine not running preferably not hooked up to the dyno the torque arm load should be zero The second combination is more complicated You must put a known load or torque on the dyno The best way to do this is to hang known weights on the dyno a known distance out from the center of the dyno Knowing the weight and the Torque Arm distance y
89. Tq 8 26 different sections click on the Folder Stroke 1 815 Pk Tq RPM 9750 name from the list shown at the lower aot 2 Cycle a toRree 10000 right of Figure 2 2 The list of tests will Ire Sis pm Date 01 02 2000 then be updated for that Folder To pick Yamaha Pipe test a test simply click on it from the list of 12 7 98 tests then click on the Open button Lo 1 148 Hi 3 8 For those familiar with computers G2 9 25 flex ENERTIA DYNO Folders are actually subdirectories or folders in the DTMDATA folder The Name Folder can be changed to Q na ae E i ari Eng 1 6 O List by File Name include Eng rE something like fia used in the le eres casts ENS ary bith DOS v1 x in the Preferences menu Files Not Filtered all files listed name te dienley all the tests saved Notice in Figure 2 1 that a current test examples under that Folder name is listed at the top in square Open Fiter Advanced Name brackets This is the file of recorded Cancel Help ason ad DataMite data engine data and DataMite and Dyno settings which are Click here to pick a different category or group of currently saved in the Test Library and tests Folder from which to displav a list of Test are the data and specs you are currently working with If you change the engine specs DataMite specs Test Conditions or Dyno Specs make a graph or report it is for this test file If you click on one of the Menu Comma
90. When you work with a new test it is added to the top of the History Log and if the Log is full the last run drops off the bottom of the list In the Pro Version the History Log is an alternate way to Open tests which have been saved to the Test Library The advantage of the History Log is it lists the tests you most recently worked with at the top Figure 3 33 History Log and Options Click on File then Open from History Log Click on Test Title to Open that Test File Click in the Save column to enter a Yes or erase a Yes All tests move to the bottom of the IA OataMite Data Analyzer 2 0 Performance Trends YAM 925 CFG File Edit Graph Report TestConds Engine DataMite Dyno Preferences Help Test amp Engine Conditions 2 047 Bore 5 19 pm 01 02 2000 1 815 Stroke PkTg 8 26 97507 Test Comments 5 97 cid 2 Cycle PkHP 15 66 A 0000 1 013 Corr Factor gY amaha Pipe tes 12 7 98 Lo 1 1 8 Hi X Test Data corr to 29 92 w Test History Close History Log Cle p b0 deg dry air olx Test File and Path SavefEngne TestDate PeakTqa Peak HP Yam100 0003 tkrause yam 925 cfg tkrause yam S00 cfg jason jun2 cig jason jun1 cig jason junk cfg domenic dddd1 2 cfg 01 02 2000 04 11 2000 01 02 2000 01 02 2000 01 02 2000 04 12 2000 04 12 2000 04 12 2000 8 26 9750 13 29 10250 7 80 9500 7 72 9750 7 64 9750 11 42 15750 1983 23 9500 00 0 11 58
91. a List by Eng Af include File Name jaia Files Nof iltered all files listed F name to display all i the tests saved Ofen Filter Advanced a Telg Folder Cancel Help Delete 135 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Comparison Graphs Graphs are often the most insightful way to compare two dyno runs You can see at a glance how the runs compare where one setup is stronger more torque and HP You can also see if the data looks accurate If you know something about how a modification should affect the engine you can see at a glance if it did For example if you made a minor change to exhaust pipe length and 1 4 inch would be a minor change you would expect the 2 dyno runs to be fairly similar First check the data quality of the tests you want to compare If you checked the data quality right after you first downloaded the tests you could skip this part now Click on Graph at the top of the Main Screen and make the settings shown in Figure 4 22 You will graph Engine RPM and Dyno RPM vs Time for all data with Filtering set to None You will obtain a graph like Figure 4 23 There is only one minor spike in Engine RPM which the program could not Edit out If this spike had been in Dyno RPM the data would not be very good See Section 2 10 on Editing Out Noise Spikes However since it is relatively small in the Engine RPM the data quality is OK Figure 4 22 Graph
92. a from 1 File Over Another File Example of Graph before Time Aligning w DataMite Analyzer v2 0 YAM 925 CFG Back File Format View GraphType AddTest HistoryLog Single Test Help lel el ay eeel edo TD edeli eveise yam100 0003 all Corr Tq 1 Corr HP i 15 0 X 20 0 Time sec Example of Graph after Time Aligning Back File Format View GraphType AddTest History Log Single Test Help 5 i A E A ele e edele vees Corr Tq Corr HP vs Time 0 yam100 0003 allo Corr Tq L i Corr HP AZ i i pyam 950 all Corr Ta 0 Corr HP 0 20 0 Time sec alyzer 2 YAM 925 CFG mat Vie Graph Type Add Test lal v Zoom Full View T Specify Scales axes History Log v Show Adjusted Timing Show Original Timing Reset Timing to Original Timing Timing Shift Size 001 Seconds En 01 Seconds v 1 Seconds 1 0 Seconds Turn Cursor On The test you are shifting is identified by printing the name and outline in bright nink To switch to a different file click on one of the graph data types for that file The number of seconds each test has been shifted is displayed here Click on View for other Shift options Click here to show the amount you have shifted each test Click here to return the graph to its unshifted original condition Note that the program remembers the amount of shifting for the displayed lobes until you close the graph screen ope
93. a screen for LaserJet IIl on LPT1 selecting various Specific Printer printing and color options Tr HP LaserJet IIl on LPT1 pena thoes Orientation Paper settings to correct certain print x Portrait Size Letter 8 172 x 11 in problems O Landscape Souce Upper Trp E 96 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Figure 3 19 Adding Information to a Graph Printout Most of these options have no effect on the graph on the screen only the graph that is printed Click on these s to change which Data Set s test file s comments and title you are working with w Printed Graph Comments Click here to change the Test Comments comments which 1 C2 appear on the Main Screen Graph Title Changes to Data Set 1 s Test Comment comments the current test are Test Summary Yamaha Pipe te6t permanent Changes to other Test Summaries are created by the pale if KT Data Set s comments are program and include valve and port o l 1 sizes test times and dates etc G2 9 25 flex temporary They can not be changed by the ENERTIA DYNO user 2 Graph Data Sets comments available for each Data Set This one comment is printed directly under the graph Include on Graph V Test Summaries Comments Comment Titles to Use Std Titles l C Alt Titles ir The Titles to Use options give See Titl you a way to reach the Menu in ae Figure 3 26 to change the Titles
94. aMite Analyzer Chapter 1 Introduction 1 5 Example to Get You Going To start the Dyno DataMite Analyzer from Windows 3 1 click on the Dyno DataMite Analyzer icon in the Perf Trnds program group From Windows 95 or 98 or NT click on Start then Programs then Performance Trends and then Dyno DataMite Analyzer or click on the Dyno DataMite icon on your desktop During startup of the program you will be given some introductory tips After these brief introduction screens and questions you will be left at the Main Screen shown below Notice that there is already a dyno test loaded and displayed This is for the last dyno test the program was working with when the program was last shut down If you just got your program this would be an example test which was loaded at the factory The name of the test is shown at the top in square brackets YAM 900 shown in Figure 1 3 Figure 1 3 Main Screen Pro Version Name of A DataMite Data Analyzer v2 0 Performance Trends YAM 300 CFG current test File Edit Graph Report TestConds Engine DataMite Dyno Preferences Help you are working with New start new test Ctrl N Run 1 Open from all saved tests Ctrl 0 Menu Open from History Log Test Comments Cormmand Save trl 5 o Yamaha Pipe test SRI i E 12 4 98 Save ds Cle tho 1 1 8 Hi 3 8 Open from Floppy Drive 4 4 Drive A Click on File Save to Floppy Drive A Drive then choose Bare from different Save or Open
95. and all fall very core much in order Going from left to right the 10 flex comes first then the 9 75 9 50 9 25 and 9 00 flexes This is exactly as engine theory would predict that the longer exhaust pipes will peak at lower RPMs This gives you good confidence the test data is good 5 0 7000 8000 9000 10000 11000 12000 13000 14000 15000 RPM 141 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 34 Pro Version s History Log for Graphing Multiple Runs Click here or here to show History Log shown below _ w Datahite Analyzer 2 0 YAM 1000 CFE 3 X Back File Format View Gre ppe AddTest History log Single Test Help Click here to gt ick which He EERE CB ao Corr HP vs RPM yam p00 1 T ie orr yam 975 1 is run 1 since core each test only has 1 run am 950 1 y eae The run also shows up in yam 925 1 the legend corr HP mere r am 900 1 _ w Test History of x en Tests Marked Yes Graph Test ead Clear Eea History Pryt Help Teste end Poth ___ reph Std Graph Tie RundGreph Rune Save jEngine t _ TestDate JEZ permeate 1000 cfg T 1000 ee E exampls2 yam 975 cfg YAM 975 The command YAM 950 aa Yami 00 0003 m 70272000 E Add Test Yam100 0003 01 02 2000 adds the name g YAM 900 am100 0003 01 02 2000 of the test to Sexamples yam 1000 cfa Yam100 0003 Yam100 0003 01 02 2000 the His
96. and analyze results If you go into the Dyno Specs menu you will likely get a message shown in Figure 2 18 saying that Test File GrRato44 the Dyno Specs for GrRato44 do i The program keeps not match your Master Dyno separate records of your Specs the specs for your current Master Dyno Specs the 6 2 gear reduction You may ask specs describing the Dyno you are currently What are Master Dyno Specs PARE using These Master Dyno Specs are used whenever you start a New Test The program keeps track of any changes to Dyno Specs asking you if these changes should only apply to the Dyno Specs for a particular dyno test or if these changes represent your actual Dyno the Master Dyno specs Whenever you start a new test either based on a previous test or starting completely blank the Master Dyno Specs are used Whenever you open an old test file the Dyno specs used for that particular test are used Master Dyno Specs Inertia Wheel Dia 22 5 Gear Ratio 6 2 Note that the Dyno Specs for a particular test may not match the Dyno you are currently using the Master Dyno Specs C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 20 Dyno Specs Menu for Inertia Dyno Pro Version Click on File then Enter the specs for all e Save as My Master Dyno Specs components in your e Open Master Dyno Specs inertia dyno system here e Print or Windows Printer Setup to print t
97. anged the Test Maximum run time 11 5 Type from Custom to Accel to Median run time 9 83 Meas Tq Hp or vice versa e You have changed the If this does not appear correct Check the DataMite Setup Specs for correct Data Type and Auxiliary DataMite or Dyno Setup RPM sensor descriptions although many times changes Use the Edit command to Cut Beginning or End of Data Then to these specs will not affect erase parts of the data file which may include engine warm up excessive coast down etc the Runs found 76 C Performance Trends Inc 2000 Edit Out Noise Spikes Dyno DataMite Analyzer Noise spikes are simply bad data points the DataMite has picked up as shown in Figure 2 46 These can be caused by Electrical noise especially from the ignition wires Weak or unusual engine ignition signals Dirty pulsing unsteady power to the DataMite Bad or intermittent ground Bad connections in the wiring Or the every popular Stuff happens Excessive vibration in a sensor but this usually looks more like simple noise If these bad data points are left in the data set it reduces the accuracy of any analysis This is especially true for inertia dyno runs if the noise spikes occur in the Inertia Dyno RPM One rather small spike can completely distort the entire torque and HP curve See Troubleshooting Appendix 3 for more information Chapter 2 Definitions Figure 2 45 Graph Specs to Graph No
98. ata Analyzer 2 0 Performance Trends CAMTEST Fig Edit Graph Report TestConds Engine DataMite Dyno Prefererf Click on the down arrow button to pick a different folder to save this test to Note Run 1 that the top choice in this list is Add New Folder Pick this option and then you can j Test amp Er 72 type in a new folder name This new ATT Saye a Test File IOIx lt Ps folder name will be added to the list so ee that you can save the test file to that 1 815 St New Jest Name CAMTEST2 CFG folder if you wish The word folder can be changed to most any word in the 5 97 cid lt Folger Name a Preferences menu In the previous DOS 996 Corr Ndw Folder N version this was the Track name Type in a New Folder Name here if you OK Cancel Help Advanced select Add New Folder as the Folder ae Name Enter a New Test Name and click on OK The current Click here to bring up standard Test name is given should you choose to modify it Windows File Save screen to let you slightly for the new name Use the Delete key to erase save a file in most any folder directory the name if you want a completely new name and disk drive and to most any file If you want to save the Test under a different Folder name Pro version only Note that name click on the down arrow button and select one files saved this way are not found in the Select the top choice of dd New Folder and you will sta
99. ata recording You are now ready to download the data from the DataMite into your computer 124 C Performance Trends Inc 2000 Note Some dyno operators have reported damaging engines by keeping them attached to the inertia wheel and letting the inertia wheel and engine coast slowly to a stop This coasting time could take well over a minute Problems could arise because the ignition is off but the carb still metering fuel fuel dilution or washing the cylinder walls or lack of lubrication on 2 stroke engines Dyno DataMite Analyzer gue 4 7 The New Test Screen with Tip Start New Te Cancel don t start new test Current Reading Help T Operator Engine Folder z TAN i forNew Tomiie Pick Engine Pesan Rame tor Add Type of Tes ew lest Chapter 4 Examples YAM 951 CFG Pick Which Specs to Keep based on current file YAM 950 CFG M Data ataMite Data Analyzer v2 0 Tip Any Specs which you Pick to Keep for this New Test will N Dync be based on the current test M Engi YAM 950 CFG M Test If a different test would more closely match this new test reducing the number of changes you will have to make Test in specs click on Cancel at the top Then click on File and Open at the Main Screen to select a better test on which to base this New Test T Don t show this again Once a New Test is started you can easily erase or modify any of the specs listed above Any spec
100. ataMite s memory Then when the LED by the yellow Record button comes on steady stops flashing press the yellow Record button to pause the DataMite stop its recording The Record LED will go out You could omit the step of pressing the Clear Memory button which would keep any data already recorded by the DataMite but this would not be recommended for beginners 2 Start the engine and bring it up to the point where the clutch starts to engage if you have a centrifugal clutch like most cart engines or to some RPM below where you want to start recording data 3 Start the DataMite recording data by being sure power is on and the LED Record LED is lit by the yellow button You may want to press the red Clear Memory button on the DataMite s control panel to clear out any previously recorded data 4 After the Record LED by the yellow button has been On DataMite recording data for about 5 to 10 seconds go to full throttle on the engine The engine will accelerate with the Inertia Wheel When you have reached the highest RPM of the test close the throttle to have the acceleration stop and let the dyno and engine coast down This system with a one way clutch makes this easy on the engine The engine de couples from the inertia wheel as soon as inertia wheel starts to drive the engine so the engine coasts down and stops in just a few seconds 5 About 5 or 10 seconds after the run press the yellow Record button on the control panel to stop d
101. atio amp Chain Drive as the Type if you For motorcycles with a Primary gear drive know the Primary Ratio Select Primary Gears amp Chain Drive if you between the engine and transmission Select Primary Ratio amp Chain Drive as the Type if you know the Primary Ratio Select Primary Gears amp Chain Drive if you know the Teeth on the Depending on your choice certain inputs will now be enabled Primary Gears Teeth Engine Gear _Hete Cance Print Teeth Engine Primary Gear know the Teeth on the Primary Gears or Sprockets This is the number of teeth on the gear or sprocket attached to the engine crankshaft or what will spin at engine RPM when the clutch has locked up If you selected Gear Reduction amp Chain Drive as the Type typical of motorcycles this will be called Teeth Engine Primary Gear and is the teeth on the sprocket or drive gear on the engine s crankshaft In almost all cases this number will be smaller than Teeth Dyno Gear Teeth Dyno Gear Teeth Clutch Primary Gear This is the number of teeth on the gear which attaches to the dyno or spins at dyno RPM If you selected Gear Reduction amp Chain Drive as the Type typical of motorcycles this will be called Teeth Clutch Primary Gear and is the teeth on the sprocket or drive gear on the transmission input shaft or clutch shaft In almost all cases this number will be larger than Teeth Engine Gear Teeth Engine
102. be manually read off a Psychometric chart from these two readings This calculation replaces reading the chart The Wet Bulb Temp must be less than the Dry Bulb Temp 67 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 68 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 69 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 70 C Performance Trends Inc 2000 2 9 New Test Menu get data from DataMite The New Test command is available by clicking on File at the top left of the Main Screen then selecting New You will then be presented with the screen shown in Figure 2 39 Dyno DataMite Analyzer Chapter 2 Definitions The New Test command is the only way to get a recorded data set dyno test from the DataMite See Example 4 1 and 4 2 for more details on the New Test menu When starting a New Test it is usually best to first Open a previous test which is similar to the New Test you will be running similar Engine specs similar Test Conditions and Similar Test Comments This previous test will then be the pattern or template for the New Test and will save you from having to type in many specs to describe this New Test This also ensures consistency between your tests and reduces the possibility of errors Important The DataMite Specs and Dyno Specs for the new test will be from the current Master DataMite and Dyn
103. blems with the data Filtering Some Note that the peak is the lowest and the valley is the least deep when filtering is the most in this case Heavy Heavy Filtering can hide problems with data Before you use Heavy Filtering be sure to check the data with Filtering set to None first Filtering Heavy C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Graphs Comparing More Than 1 Test Basic Version There are 3 basic types of tests which can be graphed in the Basic version Figure 3 15 Graphing Multiple Tests Basic Version Current test results These Choose Add New Test Choose Add Last Test to add the are the test results of the test to open up the entire last test you had added to the graph file which you are working Test Library from which for comparison Test Folder and with on the Main Screen to choose a New Test File name are shown for your info e Last test results graphed These are the test results DataMite Analyzer 2 0 REEDO9 CFG which you previously included in the graph for comparison This allows you a way to Add Last Test tkrause yam 950 cfg easily refer back to one Add New Test particular test for comparison e Add Test ets you pick any test from the Test Library to compare to the Current test results This test now becomes the Last test results graphed In the Basic version you can only compare additional test to the Current Test If an additional test i
104. ck on the Time Align buttons 4 4 t wee ede ee ede ee Se eS oe So ey ooo a ql 22 0 Time sec C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 28 Using Cursor to Check Values on Graphs w DataMite Analyzer 2 0 YAM 1000 CFG x Values at the Back File Format View GraphType AddTest History Log Single Test Help cursor line are lo Bl aa eee elo dy fol xy ty ruview setseged shown here in the Engine RPM Dyno RPM vs Time yam 1000 all Legend Engine RPM 7004 Dyno RPM 1047 Fa Click ona graph Sait RPM 6999 line to bring up the Dyno RPM 1041 cursor line The values of the graphs at this line are displayed in the legend which shows the Engine and Dyno RPM match well from each test The accelerations are now starting at the same time at approximately 7000 Engine RPM ee ee ed ed Cursor Time 22 0 Time sec 10 46 Engine RPM with 10 flex is about 100 RPM less showing a slightly slower 15458 2314 yam 975 all Engine RPM 15554 Dyno RPM 2331 I Click on the graph lines at some later time during the acceleration to see how the Engine and Dyno RPM match Engine RPM for the 10 flex is about 100 RPM lower at the end of the acceleration which took about 8 67 seconds 19 133 10 467 seconds 4 7 rF 22 0 Time sec 19 133 139 C Performance Trends Inc 2000 Dyno DataMite Analyzer
105. cs and the Master DataMite specs which should be the current DataMite setup will be copied to this screen When you back out of this screen you can then keep these Master DataMite specs as the DataMite specs sensors and calibrations which will be used for calculating this test s results Save As Master DataMite Specs Click on File then Save As Master DataMite Specs and the current settings is this screen will be copied to the Master DataMite specs Do this only if all the current settings in this screen DO match the current settings sensors and calibrations of the DataMite right now and for the near future Remember that the Master DataMite specs will be used for the next test you download from the DataMite Print Click on File then Print to print this screen Current Readings Click Current Readings to display the a screen showing current readings for most sensors This screen can be very useful for troubleshooting problems with signals or for watching the engine through a dyno test like a tachometer See Section 2 7 for more details Help Click on Help for help on this screen 46 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 47 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 48 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 6 Dyno Specs The Dyno menu tells the program what type of Dyno you have and how you measure t
106. cs pot selected to Keep will be mostly blank when you start the New Test These are the comments which you can modify Uncheck Test Comments to start with blank comments for the New Test A summary of the current settings is given here Click on these buttons to see the current Engine or Test Conditions Setup Click here to Check or Uncheck these options Checking means you want to keep these specs for the new test Once the new test is started you can then make modifications to these specs if you want C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions If you want to check some of the specs in the other screens or want to modify some specs from the previous test click on the See Specs buttons for each category of specs Click on Help at these menus for more info on how to enter these specs When you close out these menus you are brought back to the New Test screen Be sure to check the check box at the left for all specs you want to use for your new test All Categories not checked will be blanked out Blank specs may cause problems with more detailed analysis and won t allow you to keep track of important details about the engine you are testing Most all specs in these categories can also be changed once the test has started with no problems This includes specs which simply describe the test and engine and do not affect any calculations or what is recorded like Engine Specs Test Comments etc
107. curate torque and HP measurements This is done by letting the inertia wheel coast down from a high RPM to 2 lower RPMs Start a stop watch at a high RPM Then note the time at some significantly lower RPM and then at some much lower RPM The high RPM should be in the high RPM range of your engine testing and the lowest RPM should be in the low RPM range of your engine testing Enter the RPMs and times where the highest RPM will have a time of 0 The program will calculate the HP loss at the different RPMs For small Briggs inertia dynos these HP losses are generally in the 2 to 4 HP range Note that this process may be done automatically in a later version During this coast down it is CRITICAL that you are NOT spinning the engine also Coastdowns can only be done with dyno systems with clutches which complete disengage the engine or one way clutches See Example 4 1 for a procedure Other Specs For either the Basic or Pro version tell the program the Type of Dyno and any Gear Ratio between the engine and inertia wheels Click on the Gear Ratio Clc button to calculate the gear ratio This calculation is discussed in Section 2 8 2 Dyno Type Select the Type of Dyno you have In this version this choice has little effect In future versions it will be used to determine if separate Engine and Dyno RPM readings are required and whether the entire vehicle is pressent Chassis Dyno Check the Readme Doc file click on Help then Display R
108. d In the Pro version it also lets you record some running conditions and specify how you want the torque and HP data corrected Type of Test Click on down arrow to select the type of test you ran This choice can have a large impact on what data is graphed and analyzed Your choices are basically e Dyno Run to measure torque and HP e Custom Test which would be anything else Notice that some of the choices are not used as they are used for Test Types in the vehicle versions of the software Weather Conditions The weather conditions surrounding the engine affect the air s oxygen density which affects engine power You can use your own weather stations In this cases Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 9 Test Conds Menu Pro version Data Type is critical to how the DataMite data is divided up into runs which can have a large impact on the final results These specs are mostly recorded for information only w lest Options Test Room Weather Conditions Method of Reading Weather Data Radio TY Report with Rel Hum Cor Barometer Hg Air Temperature deg F Relative Humidity Elevation feet l Dyno Conditions Water Temperature deg F Oil Temperature deg F Correction Factor Correct To Std Race Dyno 29 92 60 dec 7 Correct for Eng Inertia Effects l Help Enter the specific gravity o
109. d all the information below before restoring data If you are not familiar with Windows Explorer have someone more experienced help you The ONLY reason to restore data is if you have lost test files This could be because you mistakenly erased it you had a major computer failure or you are moving the program to another computer Do NOT restore data unless you have one of these problems as you could possible create many more problems than you are trying to fix When restoring test files and folders you pretty much reverse the procedure for backing up First you put your backed up floppy disk in the floppy drive Then open Windows Explorer find the Floppy drive icon and click on it to display its contents Right click on the folder you want to restore and select Copy 167 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Now find the DTIMDATA folder under DTM20 under PERFTRNS PTI usually on the C drive Right click on the folder 1 level UP from the folder you are restoring For example if you are restoring the test file folder CHEV which was in the DTMDATA folder you must click on the DTMDATA folder If you are restoring the entire Test Library folder DIMDATA you must click on the DTM20 folder If you are restoring the test file 194 150 which was in the CHEV folder under the DTMDATA folder you must click on the CHEV folder During the restoring copying process Windows Explorer checks to see if it is overwriting
110. d in this section If 2 or more tests are graphed vs Time then buttons will appear here letting you shift 1 test with respect to another a process called time aligning Pro version only Grid lines The style or elimination of grid lines can be changed by clicking on Format then Grid Style Pro version only Data graph lines The style and thickness of these lines can be changed by clicking on Format then Line Style Vertical Y axis The scaling of this axis can be easily changed as described in this section C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output The Graph Menu is shown in Figure 3 13 It is very similar to the Reports Figure 3 13 Graph Options Menu menu in that you select what Data Types you want to graph from the list at PELETgR EIT Ea the top Click on a Data Type to select or click on a selected Data Type to Engine Accel HPM sec de select it Dyno wheel RPM Calcd gear ratio Clutch converter slip Observed flywheel torque Data Types Observed flywheel HP Corrected flywheel torque The Data Types you can select are listed and defined in Table 3 1 on page Corrected flywheel HP 85 Only 4 Data Types can be selected for any graph M Other Graph Specs Time or RPM Graph Other Graph Specs What to Graph Time or RPM Graph xl Notes Click on the down arrow button to choose either RPM or Time for the Data Selected to Graph 4 types max Corrected flywheel
111. d on either Gauge 1 or 2 Then select User Specified Max the Range for the display either a pre programmed range our you can enter your own custom range If you set Range to User Specified this spec will be enabled Enter the highest number you want to see on then gauge here The gauge dial is divided into 6 sections It is less confusing if the difference between the Keep Options Help Cancel Print User Specified Max and User Specified Min is evenly divisible by 6 For example if you set User Specified Max to 60 and User Specified Min to 0 each gauge increment will be 10 If you set User Specified Max to 70 and User Specified Min to 0 each gauge increment will be 11 67 which is much more confusing User Specified Min If you set Range to User Specified this spec will be enabled Enter the lowest number you want to see on then gauge here The gauge dial is divided into 6 sections Itis less confusing if the difference between the User Specified Max and User Specified Min is evenly divisible by 6 For example if you set User Specified Max to 60 and User Specified Min to 0 each gauge increment will be 10 If you set User Specified Max to 70 and User Specified Min to 0 each gauge increment will be 11 67 which is much more confusing 60 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 61 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 62 C
112. divided a test into different runs This is good for beginners Choosing No can save time by eliminating extra screens when getting downloading data from the DataMite Default Floppy Disk Drive Choose the letter of the floppy disk drive on your computer usually A This is the disk drive which will be first opened when using the Save to Floppy Disk or Open from Floppy Disk File commands at the Main Screen 23 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Std Graph Title Created in History Log Pro version only Choose how you want the standard Graph Name created in the History Log If you are very careful about how you use engine s then Engine Number may be a good choice However for most users the Test File Name is a better choice Torque HP decimals Pick the number of decimal places you want displayed for Torque and HP on graphs and reports For small engines like Briggs choose 2 to obtain more detail like 7 45 HP For larger engines choose or 0 for numbers like 122 3 HP or 591 HP respectively Always Autoscale New Graph Pro version only Choose Yes for Always Autoscale New Graph and each time you do a new graph the graph is autoscaled program picks the scales to show all data This is usually the best for beginners Choose No and any manual scales you have set will be maintained for each new graph until you quit the program Require Engine for New Test Pro version only C
113. dynos within reach of the average cart racer The TDK website http www1 cedar rapids net tdkmotors Has shown many how relatively easy and inexpensive it is to build a simple inertia dyno that works Tom has also had considerable input on this program both with suggestions and troubleshooting His efforts are greatly appreciated Table of Contents Chapter 1 Introduction 1 1 1 Overview of Features 1 1 2 Before You Start 2 1 3 A Word of Caution 3 1 4 Getting Started Installation 4 1 5 Example to Get You Going 7 Chapter 2 Definitions 11 2 0 Basic Program Operation 11 2 1 Main Screen test data input 15 2 2 Preferences 23 2 3 Test Conds 27 2 4 Engine Specs Pro version only 33 2 5 DataMite Specs 41 2 6 Dyno Specs 49 2 7 Current Readings 59 2 8 Calculation Menus 63 2 9 New Test Screen get data from DataMite 71 2 10 Edit Test File Options 15 Chapter 3 Output 81 3 1 Reports 83 3 2 ASCII Data Files Pro version only 89 3 3 Graphs 91 3 4 Printer Output 103 3 5 Data Libraries 107 3 6 Filter Test Files Pro version only 111 3 7 History Log Pro version only 113 Table of Contents cont Chapter 4 Examples Example 4 1 Installing the DataMite on an Inertia Dyno and Running a Test Example 4 2 Analyzing Dyno Data Appendix 1 Appendix 2 Appendix 3 Appendix 4 Appendix 5 Appendix 6 Index Accuracy and Assumptions Hardware Installation and Operation Troubleshooting Data Recording Backing Up Data Ca
114. e freq hz Read e Not Being Used enean E __ 2nd Yalue Engineering Units Your choice here will determine what other inputs on this screen are made Danaa Siren hell _ freq hz Read available Bes m Note Pick the location of the sensor and of magnets Mag nets or targets if a different type of sensor is being used on the rotating component If you have specified an RPM type of Sensor click on the down arrow button to choose the number or magnets on the shaft or wheel Keep Specs Help Cancel Print Be sure to read the Notes on RPM Data concerning the Engine RPM calibration on the previous page Unlike Engine RPM where you may not be sure of the number of cylinder firings per engine revolution the Screen for Analog Converter Magnets you pick should be the same as what are actually mounted If not or the recorded data is noisy you have some other problem with Pick Analog Converter as Sensor your setup See Appendix 3 Troubleshooting Other RPH Specs Or Sensor Type If you have specified an Analog Converter type of Sensor click on the down arrow button to choose the type of sensor For most the program Sensor will know the calibration simply by your choice However if you choose i Sensor Type Custom user supplies specs then the lower section called Analog Std 0 15 PSI Sensor Specs becomes enabled See Analog Sensor Specs on the next Std 0 70 PSI page A Std Thermocou
115. e Observed flywheel HP Corrected flywheel torque Corrected Pa HP Notes Data Selected to Report 6 types max Observed flywheel torque Observed flywheel HP Corrected flywheel torque Corrected flywheel HP 143 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples averaging will effect the results and can even change which exhaust length produces the highest average HP Do not extend the Averaging RPM Range out to the very start or end on the dyno test At those extreme RPMs it may not be certain if the throttle had gotten completely open or if the engine stumbled when you opened the throttle or if you had started to close it Also do not pick an RPM range larger than what you will use in the vehicle For drag racing where the transmission may allow the engine to stay in a relatively narrow RPM range an RPM range from 10000 to 12000 may be correct However this engine is used in circle track and road racing so a wider RPM range is used in the vehicle Your experience tells you to enter a range from 8000 to 14000 RPM We also chose to include Observed Torque and HP in this report as a check If the comparisons between Corrected data does not match the Observed data it may be useful to double check the weather conditions in the Test Conds menu for each test or rerun the test Figure 4 36 Report Showing Average Torque and HP from 8000 to 14000 RPM iA DataMite Data Analyzer 2 0
116. e Average Engine Torque indicated by the Testing Estimates specs Starting Engine APM Required Inertia Finish Engine RPM Current Inertia Desired Accel Time sec Total Gear Reduction Is the total dynamometer Inertia of the current dyno specs This is provided for comparison to the Required Inertia and to show the Inertia number used to estimate the Accel Time for Current Inertia below Note Use this screen to estimate inertia wheel or gear ratio requirements for testing a particular engine torque level Accel Time for Current Inertia Is the time required for the Current Inertia to accelerate from the Starting Cancel Print RPM to the Finish Engine RPM for the given Average Engine Torque and other Testing Estimates specs Max Inertia Wheel RPM Is the Inertia Wheel RPM for the Finish Engine RPM and Total Gear Reduction entered This menu does no checks on the safety or design of an inertia wheel You must design an inertia wheel carefully for it to be safe at some particular operating RPM Testing Estimates Average Engine Torque Is your estimate of the average engine torque this engine will produce over the RPM range specified in ft Ibs foot pounds 54 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Starting Engine RPM Is the low engine RPM at the start of the test at which you go full throttle Finish Engine RPM Is the high e
117. e DataMite click on Start New Test at the top of the screen If some critical specs have not been entered the program will warn you and ask you for it at that time The program will fill in the Test Time and Date based on the computer s current time and date This can be changed later by clicking on the Test Time Date at the Main Screen The program will now start to read the DataMite data as shown in Figure 4 12 After the data is read from the DataMite the program performs 2 important functions 1 It checks for noise spikes and eliminates all that it can A noise spike is basically a bad data point caused by electrical noise or vibration in a sensor See Section 2 10 Editing Out Noise Spikes and Appendix 3 Troubleshooting 2 It checks to find the beginning and end of the actual dyno test run based on pre programmed criteria of what a dyno run looks like Figure 4 13 shows the messages the program could give to let you know how the data appears If you get several noise spikes you should investigate the source Noise spikes in the Engine RPM or Dyno Wheel RPM can cause major errors in calculating torque and HP Noise spikes can also cause problems when the program tries to find the beginning and end of the dyno run Note that editing out noise spikes and having the program find the beginning and end of the dyno runs can also be done at anytime in the future See Section 2 10 Editing Tests Figure 4 12 Main Screen While Dow
118. e Diameter Enter the diameter of the intake valve in inches This number is not used for calculations and no entry is required Intake Port Volume Enter the volume of the intake port in CCs This number is not used for calculations and no entry is required Intake Rocker Arm Ratio Enter the ratio of the intake Rocker Arm This number is not used for calculations and no entry is required 36 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Intake Valve Lash Enter the intake valve lash in inches ex 018 This number is not used for calculations and no entry is required Exhaust Valve Diameter Enter the diameter of the Exhaust valve in inches This number is not used for calculations and no entry is required Exhaust Port Volume Enter the volume of the Exhaust port in CCs This number is not used for calculations and no entry is required Exhaust Rocker Arm Ratio Enter the ratio of the Exhaust Rocker Arm This number is not used for calculations and no entry is required Exhaust Valve Lash Enter the Exhaust valve lash in inches ex 018 This number is not used for calculations and no entry is required Intake amp Exhaust Fuel Delivery Click on the down arrow button to select the type of fuel delivery system This number is not used for calculations and no entry is required Carb Type in most any comment to describe the carburetor s No entry is required Fuel Setting Ty
119. e Figure 2 23 Load is measured here Absorber as a force or Case a pressure Floats in Bearing Torque Arm Length C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions If this is your type of dyno choose Torque Arm as the Torque Measurement type The dyno screen now becomes very simple as shown in Figure 2 24 See Appendix 5 for calibrating a Torque Arm type of dyno Figure 2 24 Torque Arm Dyno Screen Note that Gear Inertia Dyno Specs xi Ratio and Dyno Back File Torque Measurement Current Readings TD Type are still Torque Arm Dyno Specs requested The torque calibration is contained in the DatgMife specs menu Click on DataMite at the top of the Main Screen Then T pick the channel you will use for recording 6rque by click on the Sensor and Calibration for the appropriate channel At orque the calibration screen pick Analog Corerter as the Sensor then Dyno Torque as the Sensor Type Then enter in the calibration is Sensor Specs to calibrate this charnel for reading torque Torque Channel is currently Channel 2 actually done in the DataMite Other Specs Help Specs See Dyno Type Select parts with different thickness in main wheel p xx Appendix 7 Total Gear Ratio 5 cite 2 6 2 Hydraulic Pump Pressure Things of iene ie salar othe Tee ALS Figure 2 25 Hydraulic Pump Pressure Dyno absorber except without the floating bearings and the torque arm For example
120. e Printing e Cursor to pinpoint the value of a particular point on the graph e Changing titles and legend names e Changing the scales These are discussed in this next sections 95 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Printing Figure 3 17 shows the options for printing graphs and how to access these options Figure 3 18 shows the screen for changing the Windows Printer Setup Figure 3 19 shows how you can add information to a graph printout by clicking on Format then Edit Printed Comments and Data Output Figure 3 17 Printing Graphs Clicking on the Printer button is the same as clicking on File and then Print Color Click on File to display the 3 w DataMite Analyzer v2 2 HEEDOS CFG print menu options ele 2l Click here to print the graph in Add Test to Graph color solid lines Print Color solid lines Click here to print the graph in Print Black amp White dashed lines black amp white various styles Windows Print Options of dashed and solid lines Using Dot Matrix Printer v Not Using Dot Matrix Printer Slok here change ie printer or printer driver page orientation etc Select between these 2 options for your printer type If you are getting a break in the border around a printed graph try the other option j I t 1 Figure 3 18 Standard Windows Printer Options The Options sometimes called Advanced button i displays
121. e beginning of Example 4 1 If the Engine RPM signal is not coming through e Yellow ignition wire has a break in the harness Black ground wire in harness is not well grounded You are not hooked to the correct terminal or wire in the ignition system to record RPM Fault in the Inductive Pickup or Inductive Pickup harness wiring Fault in DataMite module If other RPM signals are not coming through e Magnets must be adjusted closer to the sensor Note Do not adjust closer than 050 or so close that the sensor may hit the magnet e Leads to wheel sensors have a break in the harness e Black ground wire in harness is not well grounded A ground usually does not affect wheel RPM sensors e Fault in DataMite module 159 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies DataMite Reading Data Signals but Not Sending to Computer Be sure you take the DataMite out of Setup Mode and it goes into Record mode Record data for at least 1 minute with at least the engine running to create engine RPM data Follow the procedure in Example 4 1 for downloading the data If during this downloading process you receive the message shown in Figure A3 1 follow the suggestions in Figure 3 1 for troubleshooting If you have disconnected the DataMite from the dyno and the main harness to Figure A3 1 Error Message When Not Reading DataMite Data Are you Ready to Try Again DataMite Not Responding Possible reason
122. e main wheel is 24 inches in diameter and 1 125 inches thick 1 1 8 inch It is on a 1 inch diameter solid shaft a 5 2 inch drive sprocket on it 52 teeth which 16 inches in diameter and 7 25 brake disk which is 16 inches thick Your dyno also has a special one way clutch which lets the engine decelerate quickly at the end of the run while the inertia wheel itself decelerates more slowly Figure 4 4 shows how these specs would look after you enter the specs described above You can also click on the Cle button by the Total Gear Ratio to bring up the calculation menu shown in Figure 4 4 There you can enter the teeth on the engine and inertia wheel sprocket to come up with the gear ratio of 4 Figure 4 4 Dyno Specs for Your When finished changing these specs click of File then Inertia Dyno Pro version Save as Master DataMite Specs to save these Check components that your system has un check those it does not Note that Brake is checked for the disk brake Clutch is checked for the one way clutch and Include Misc Component A which is the 52 tooth sprocket Inertia Dyne Specs E3 Note that these other components contribute Inertia Dyno Spect almost nothing to the i ii ii i 5 Sections in Main Wheel of Main Wheels system s total inertia Inside Dia Outside Dia Width len Weight Ibs Material Inertia Toll because they are rather Main Wheel z 99 8 light in weight and small in Main Wheel g ction 2 diameter Main
123. e one dyno run to another to check the effect of modifications e Graphs can compare runs on a time basis or an RPM basis e Various graphing features like Zooming Filtering Time Aligning and the Cursor let you manipulate the graphs in various ways to obtain different comparisons e Reports allow a convenient way to compare tests by obtaining averages over a particular RPM range and then comparing these average numbers 145 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples 146 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Appendix 1 Accuracy and Assumptions Repeatability The difference between repeatability and Figure A1 1 accuracy is a concept you Repeatable Measurements produce the same readings test after test but the reading may not be the true HP may not understand Graphically accuracy and repeatability are shown in Figure A 1 1 Think of the dyno as an archer which is trying to hit the bulls eye or the engine s true HP measurement Let s say the true HP was 150 HP but one dyno always comes up with values between 142 to 143 HP This dyno is not very accurate but is very Accurate Measurements produce a reading which is close to the true HP reading which is a reading other accurate dyno testers would get repeatable only a 1 HP spread in data Another dyno comes up with measurements which vary from 145 to 155 HP which average o
124. e sensor With zero pressure on the system crack a line fitting to let all pressure bleed off type in 0 and click on the Read button for the 1st Value Then Tee in a good pressure gauge to the same source as the pressure sensor and run the system to produce some fairly high pressure Read the pressure off the gauge and type the reading in Then click on the Read button for the 2nd Value Click on Keep Specs and you re done Zero is usually a good choice for the Ist Value You want the 2nd Value to always be fairly high at least 65 of the full range or higher For a 200 PSI pressure gauge this would be 65 x 200 or at least 130 PSI For a 50 ft lb torque calibration it should be at least 65 x 50 or at least 32 5 ft Ibs The process above works well for Linear Sensors A linear sensor is one where if what you are measuring doubles the signal doubles also Some sensors are non linear Future updates to the program will allow you to input curves or even tables of calibration numbers for more advanced calibrations 174 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Appendix 6 Coastdown Test A coastdown test for a inertia dyno is one where you bring the dyno inertia wheel up to a fairly high RPM and then let it coast down The only forces acting on it are aerodynamic drag bearing friction and any friction on whatever else is turning usually the chain drive also You can take this information and load it into the Dyn
125. e that just the Test File Name stays in the History Log Should you delete the file using the Open from all saved tests command the test file will be deleted but the name will stay in the History Log When you try to open it or graph if from the History Log you will get note saying the file can not be found 113 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output You can print the History Log on a printer by clicking on the Print menu command Note that the History Log will be most readable when the Page Orientation is in Landscape setting Max torque and HP are handy to remind you what a test was and for comparing different tests History Log at Graph Screen At the Graph Screen several options are available to graph selected tests from the History Log and change the Graph Titles You can obtain the History Log by clicking on the menu command History Log at the top of the Graph Screen The History Log is how you graph different tests together for comparison From this screen you can e Choose to Graph certain Test Results by clicking on the Graph column to insert a Yes there Tests marked Yes to Graph will be graphed when you click on the Graph Tests Marked Yes The first test usually the current Test you are working with is always graphed even with no Yes marked The number of tests actually graphed are limited by available space usually a limit of about 24 graph lines total e Graph only the current te
126. e what the Has this relationship options are and what specs can be entered in the To what I enter here spec You can select up to 3 conditions to look for For the Operator Jack Customer Johnson Big Block Chevy example above you would need to search for 3 conditions For the valve seal example you could just search for 1 condition You add conditions by checking the Include this condition also box This enables the other specs for each condition If more than condition is being used for the search you must determine if you want the search to include tests which fit ANY of the conditions Or or must match ALL conditions And For example if you are looking for tests run by either Operator Jack or Operator Joe you would select Or If you want Tests which made more than 300 HP and were done since Jan 1999 the tests must match both conditions you would select And The 3 command buttons will do the following Show Files Only Fitting These Conditions will return you to the Open Test File screen Only files fitting these conditions will be displayed which may be no files in some situations You can click on various folders or whatever name you have given to folders in the Preferences menu at the Main Screen to see if there are any matches in other folders Turn Off Filtering show all files will return you to the Open Test File screen and now all files will be displayed Print List of All Files Fitting
127. eadme doc File at the top of the main screen to see if this has been updated 52 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Total Gear Ratio This spec is critical for calculating Clutch Slip the slip between the Engine and Dynamometer In future versions this number will be used if you specify the Dyno Type is Direct Drive no clutch Menu Commands Back Simply closes this menu and returns you to the Main Screen If you made changes to these specs you will be asked if you want to keep them for the current test If you answer Yes the results of the current test may be changed based on these changes This is good if you are correcting a mistake If you answer Yes you will also be asked if these changes should be saved to the Master Dyno specs Only answer Yes if all the current settings in this screen match the current specs of the Dyno right now and for the near future Remember that the Master Dyno specs will be used for the next test you download from the Dyno File Open Master Dyno Specs Click on File then Open Master Dyno Specs and the Master Dyno specs which should be the current Dyno setup will be copied to this screen When you back out of this screen you can then keep these Master Dyno specs as the Dyno specs which will be used for calculating this test s results Save As Master Dyno Specs Click on File then Save As Master Dyno Specs and the current settings is this screen wil
128. erformance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Unlock Program Options Figure 2 7 Menu to Unlock Program Options The Dyno DataMite Analyzer is equipped with copy FA Unlock Form olx protection This ensures that legitimate users do not have to cover the costs for unauthorized distribution of Code to Extend Pemo eee the program When you first receive the program it is Computer Hardware 842897 in demo mode In demo mode you can try either the Registered Name Joe Smith em 5 Cance Basic version or the full Professional version for ten Registered Code t 14666 days All features are working in demo mode Enter Unlocking Code Help Performance Trends to obtain an Unlocking Code Click on Help for more info on how you use this screen to unlock this program This Unlocking Code will be for either the Basic version or the Pro Version whichever you have purchased Sometime during those 10 days you must call Before you call Performance Trends you should get your registered code number and computer hardware number These are available by clicking on File in the upper left hand corner of the Main Screen then clicking on Unlocking Program Options A screen will appear as shown in Figure 2 7 See Section 1 2 for more information on how to unlock the program Graph The Graph command lets you graph several different types of data from the current test either by itself or with data from other
129. f the fuel being used most situations this entry is for information only and no entry is required If you are measuring fuel flow from a volume flow meter this value will be used to obtain b min fuel flow p xx These specs determine to what standard conditions the data is corrected Weather conditions are used to correct torque and HP to standard conditions be sure you read the Notes on Weather Conditions at the end of this section page 29 Method of Recording Weather Data Click on the down arrow button of this combo box to be presented with this list of options e Radio TV Report with Rel Hum Radio TV Report with Dew Pt Uncorr Baro with Rel Hum Uncorr Baro with Dew Pt Altimeter with Rel Hum Altimeter with Dew Pt If you change the Method the 4 inputs specs in the Weather section are changed or enabled disabled as necessary to represent the new Method In addition all the input specs are adjusted to what they would be with the new Method For example Corr Barometer of 29 3 at an elevation of 1200 feet is converted to 28 03 Obs Barometer with Elevation disabled Elevation is 27 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions not important when you are using an uncorrected or observed barometer as this type of barometer shows the actual air pressure at the dyno If you change from Uncorr Baro to Radio TV Report with a Corr Baro the program will ask
130. for Test 1 File Name for New Test is the file name the program will create for saving the Add Type of Test Test Data for the new test you are starting The program fills in a default name of the current test name but incrementing the last digit in the name by 1 You can change this name to most anything you like The program will warn you if the name entered is not valid and show you what is wrong For this example type in the name STKBGS01 for this stock Briggs engine The program adds the CFG extension to produce STKBGS01 CFG Operator for New Test is the name of the operator for this test Click on Pick to pick an operator name already used or to enter a new name The program defaults to the operator of the current test Through the Operator Menu discussed Test T New Test est STKBGS01 C STKBGS O001 Meas Tq HP fram Pick Which Specs to Keep based on current file YAM 950 CFG V DataMite See Specs Type 4 Channel DataMite See Specs Inertia Dyno 72 2 Ib x ft 2 Keep this box checked if you want to copy the current test s See Specs Engine Specs to the New Test V Test Conds Keep this box checked if you want to copy the current test s Jon Test Conditions to the New Test V Dyno IV Engine Keep this box checked to use comments below for New Test Stock Briggs Baseline IV Test Comments Once a New Test is started you can easily erase or modify any of the specs listed above
131. for unauthorized distribution of the program When you first receive the program it is in demo mode All features work in Demo mode In demo mode you can try either the Basic version or the full Professional version for ten days Sometime during those 10 days you must call Performance Trends to obtain an Unlocking Code This Unlocking Code will be for either the Basic version or the Pro Version whichever you have purchased Before you call Performance Trends you should get your disk serial number stamped in blue on the disk your registered name and code number and computer hardware number The registered name and code numbers are available by clicking on file in the upper left hand corner of the Main Screen then clicking on Unlocking Program Options A screen will appear as shown in Figure 1 1 Figure 1 1 Menu to Unlock Program Options Performance Trends will provide you an FA Unlock Form unlocking code number Type in the unlocking Code to Extend Demo 239235212 ook code number and click on OK If you typed in 842897 Computer Hardware the number correctly you will be given a Registered Name Joe Smith message that the program is permanently Cancel unlocked to either the Basic or Pro mode The Registered Code 14666 program will only run on this one computer Enter Unlocking Code _ Help If you want to run the program on another computer you must install it obtain the computer hardware number and registered
132. from these inputs For t Engine Specs Back File Help YAMAHA Figure 1 7 Pro Version s Engine Specs Menu Showing Clc Button further explanation click on the Help buttons in these menus To use the Calc Compression Ratio calculated from these inputs click on the Use Calc Value button Otherwise click on Cancel to return to the Engine Specs menu with no change to Compression Ratio Section 2 8 Calculation Menus explains all these Engine Customer amp Comments Engine Customer Blueprinted Yamaha a had l Short Block Cylinders Rod Length 5 97 cid IrIS Cam amp Heads Head s _ Cam Viv Dia Port CCs m R Ratio E Lash calculations Intake amp Exhaust Clc button calculates the value of this spec based on other inputs Once you feel comfortable changing specifications in the various menus and making various graphs and reports read Section 3 5 of this manual called Data Libraries to learn how to C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction 8 Eee save tests or recall tests which have been previously saved Then you will know all the basic commands to operate the program For a more in depth knowledge of using these commands and an explanation of the results read this entire manual C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Chapter 2 Definitions 2 0 Basic Program O
133. g 3 12 44 77 128 151 152 159 Turn Off Filtering 112 Type of Test 27 72 Unlocking 2 5 8 19 Unlocking Code 2 5 19 Unlocking Program Options 2 5 19 update rate 59 Use MM SS SS Time 84 sed 42 121 ser Specified Max 60 ser Specified Min 60 rere Valve Dia 36 37 Valve Diameter 36 37 Valve Lash 37 Vibration 77 128 151 160 162 Water Temperature 29 Weather 16 27 28 29 66 67 126 163 165 Weather Station 29 Weight 19 50 170 171 173 Wet Bulb Temp 66 67 What to Report 83 84 92 When Getting New Data from DataMite 23 Width 50 Windows 1 3 1 2 4 7 18 38 96 108 110 120 165 166 167 168 Windows Printer Setup 96 181 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 182
134. ge in the length of the exhaust flex which is a section of exhaust pipe before the expansion chamber First you will want to make one of these Yamaha tests the current test If you had just downloaded one of these runs it would be the current test If you had run these test several days ago you may have to open one of them from the Test Library to make it the current test Click on File then Open from all saved tests to open the Yamaha test with the 10 length of exhaust flex See Figure 4 21 Figure 4 21 Opening a Past Test Click on File then Open from all saved tests to bring up the Open Test File screen shown here Name of Current Test you are working with A ataMite Data Analyzer 2 0 Performance Trends STKBGS0O1 CFG ie Edit Graph Report TestConds Engine DataMite Dyno Preferences He Click on test Rur 1 file you want to anen Open Test File Test amp Eng ae Previ h T 5 Tests in Library Chosen File yam 1000 cfg TEVIEW SNOWS 2 577 Bore El it was run with 2 43 Strok m i Preview sits Feeney Engine am100 0003 ba 10 flex or a 12 67 cid 4 Joo Type of Run Meas Tg HP from Accel nu Click here 10 inch rom 975 cle Bore 2 047 Pk Tq 8 40 eae exhaust flex 052 Corr F Stroke 1 815 Pk Tq RPM 9240 Cyl 1 3 A Test Data 5 97 cid 2 Cycle Time 5 19 pm Click on Open to open this List All Files by Fileame test file List by File Nap include Eng Tio Cick on
135. ground the DataMite harness to the engine or dyno frame However you MUST THEN USE THE OPTICAL ISOLATION connector to prevent damage to your computer 151 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies It is strongly recommended you install the Optical Isolation connector from Performance Trends to protect your computer from damage to its COM port Connect the red power cable to the red side of the power supply s mating connector Total draw from the DataMite should be 60 mAmp 060 amps or less It is recommended you also install a power switch in this line This power switch can be used to reboot the DataMite should it become confused The DataMite is a computer and may need to be rebooted much like your PC needs to be shut down and restarted if an error occurs Important The power to the DataMite must be clean If you are using your own 12 volt source this power source should NOT be from the same switch that controls power to the ignition system Engine RPM Inductive Pickup Connect the yellow ignition lead to the yellow lead of the Inductive Pickup harness Wrap the Blue or Purple wire from the inductive pickup around the engine s spark plug wire You may need to adjust the number of wraps around the spark plug wire for different situations See Appendix 3 Troubleshooting Engine RPM Typical Automotive Spark Signal Connect the yellow ignition lead to your ignition module s tach or spa
136. h Menu Specs to Figure 4 15 Checking Engine RPM and Dyno RPM Data Check for Data Quality Quality Click on Graph Type to bring up the ERE ee en lt Name x menu shown in Figure 4 16 or 4 18 Engine RPM w DataMite Analyzer v2 0 STKBGSO1 CFG Back File Format View GraphType AddTest HistoryLog Single Test Help ez la ee ee Lee Pe edes eve se scateg Paaa Tae stkbas01 all Clutch converter slip i Engine RPM i rer REM Other Graph Specs Time or RPM Graph Engine RPM What to Graph All Data x when throttle Filtering is closed is Reang probably real smooth during and will have Notes acceleration showing little effect on a aE Graph 4 types max good data quality performance Dyno wheel RPM since it occurs at the end of the test Make Graph Help Cancel Print 17 5 Time sec 130 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 17 Torque and HP Graph Figure 4 18 Graph Menu Specs for Graphing Torque and HP vs RPM Click on Back to return to the Main Screen Engine Accel RPM sec Dyno wheel RPM DataMite Analyzer 2 0 STKBGSO1 CFG Calcd gear ratio Back File Format View GraphType AddTest HistoryLog Multiple Tests Help Clutch converter slip Ob d flywheel t Be Bee CEPR peee Gasaed dial Observed flywheel HP Corr Tq Corr HP vs RPM stkbas01 1 Corrected flywheel torque CorTq Corrected flywheel HP 1 Corr HP Othe
137. h firing 2 spark plugs In that case if you attached the DataMite s engine RPM wire to one of these coils you would use 2 since each coil fires 2 cylinders Engine Type This input specifies how often this spark source fires each cylinder either 1 time for each revolution typical 2 stroke or 1 time for every 2 revolutions typical 4 stroke Again you may have to adjust this input to match your engine For example a Briggs amp Stratton engine fires each revolution even though it is a 4 stroke engine with a cam and valves For the Briggs engine you would specify Cylinders as 1 and Engine Type as 2 Stroke Note you could also specify Cylinders as 2 and Engine Type as 4 Stroke to obtain the same RPM data Notes on RPM Data Engine RPM as with most of the other RPMs is not going to be off just a little bit It will be off a lot if you put in the wrong calibration specs For example if you put in Cylinders as 1 and Engine Type as 4 Stroke for the Briggs example above you would obtain RPMs exactly double what they should be If you should read 5000 RPM you would read 10 000 RPM if you should read 3000 RPM you would read 6000 RPM etc Therefore it is easy to find errors in calibration You may have to adjust these inputs to make the Engine RPM read correctly It is recommended that you only change the Engine Type or drop the Cylinders by one half then one half again This means on a V 8 you might try 4 cylinders
138. hannel This name is what will be used on graphs and reports when this channel is graphed or reported 42 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 15 Sensor and Calibration Sensor and Calibration Screen Engine RPM Channel 1 If you click in the Sensor and Calibration column you will be presented with one of the screens shown if Figures 2 15 if you click on the top row Calib 1 Cylinder 2 Stroke for Engine RPM or 2 16 for most other rows other RPM channels Engine Specs In each screen you choose from the options below and the calibration description is displayed at the top This description is read by the Cylinders pa M program so it knows how to interpret the DataMite s readings and Enam line convert them to engineering units things like RPM degrees F Eng 7 2 Stroke g movement in inches etc l Note Pick the cylinders in the engine and 2 or 4 stroke operation For special ignition systems like distributor less you may have to adjust these Engine RPM Calibration Figure 2 15 specs for accurate RPM readings Cylinders Use Calc Value Help Cance Print Pick the number of cylinders that obtain spark from the source of the DataMite s ignition signal Usually this is the number of cylinders in the engine However for some engines there may be 2 or more ignition coils A modern distributerless V 8 may have 4 coils eac
139. he noise and run the test again If the noise Engine RPM Chni 2 Chni 3 Chni 4 Engine Accel RPM sec Dyno wheel RPM Calcd gear ratio Clutch converter slip l Other Graph Specs Time or RPM Graph l Notes Data Selected to Graph 4 types max Engine RPM Chnl 2 Chnl 3 Chn 4 Make Graph Help Cancel Print spike is in a channel that is not used to calculate torque or HP the noise spike is not as critical say in an Exhaust Temperature However you must realize that the immediate jump up or down is not real Figure 2 46 shows how even a relatively minor noise spike in the Dyno RPM for an Inertia Dyno test can completely distort the torque and HP curve Any Inertia Dyno runs with even small spikes in the Dyno RPM must be rerun 77 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 46 Noise Spikes vs Just Noisy jumpy Data Typical Small Noise Spike a couple of data points are significantly different than the data points surrounding them DataMite Analyzer 2 0 INERTIA9 CFG x Format View GraphType AddTest HistoryLog Single Test Help inertiad all Dyno RPM 1600 0 1560 0 1520 0 1480 0 1440 0 1400 0 1360 0 1320 0 1280 0 1240 0 1200 0 1160 0 1120 0 Typical noisy or jumpy data shows all data points being quite different than the surrounding data points In this case the noise
140. he top of the DataMite or Dyno screens to display a tachometer for the inertia wheel 175 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 4 Accelerate the mertia wheel tothe Figure A6 2 Current Readings Screen to Read Dyno RPM highest safe RPM you will encounter during your dyno testing 5 Disengage the engine and let the inertia wheel coast down DO NOT brake the inertia wheel or do anything to add drag to the system Disengaging the engine is easy with this one way clutch dyno because the act of simply closing the throttle disengages the one way clutch Note that the drag of the one way clutch does add some drag to the system over what would normally be present but this can not be easily avoided 6 Soon after the wheel starts to coast start the stopwatch and note the dyno RPM at that time Lets say this was 1290 RPM w Current Readings Close back Options Help 1 EngRPM 1Cylinder 2Stroke 3 18401 Other RPM 1 Magnet 7 Note the time on the stopwatch at some 2 Dyno Wheel RPM 1 Magnet 4 Not Being Used RPM which is about 2 3rds of the RPM at which you started Lets say the dyno Install Optical Isolation Box for this screen to avoid possible computer damage RPM dropped to 1010 RPM in 80 seconds 8 Stop the stopwatch at some RPM which is about 1 2 to 1 3rd of the RPM at which you started Lets say this was 755 RPM at 180 seconds that is 180 seconds after you started the stopwatch at 1290
141. hem because they are not applicable to that report type 000 Start Average At Stop Average At Make Report Help Cancel Print If you selected the Pick Individual Items report type click on the Data Types in the top right section to select or deselect if it has already been selected that Data Type for reporting Time or RPM Report Click on the down arrow button to choose either RPM or Time for the various rows of the report Your choice will appear in the left column of the report What to Report Select what part of the dyno test you want to make the report of All Data Just Power Run 2 if it exists Just Power Run 1 Just Power Run 3 if it exists etc Click on the down arrow button to choose either to report All the Data all data recorded or just a particular run If you have selected an RPM graph you can only choose a particular run not All the Data Filtering smoothing Click on the down arrow button to select the level of filtering smoothing to be done to the data before the report is made None Medium Light some Heavy lots Select the lowest level that eliminates most not all of the jitter in the data Be careful not to over filter as this can completely distort the data See page 92 and 93 in the Graphs Section for an illustration of Filtering 83 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output For reports filtering is
142. his example the entire DTMDATA folder to the disk in the Floppy drive C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies i ee 5 Now you must tell the computer where you want to copy the files to Click and drag the slide bar for the left section of the Windows Explorer screen to the top You can also click on the up or down arrow buttons on the slide bar Look for the Floppy Drive icon usually the A drive Put a new formatted disk in the floppy drive Then right click on the Floppy Drive icon and select Paste from the list of options You will see the floppy drive light come on as the entire DIMDATA folder and all its contents are copied to the floppy disk Label this disk with something like DTMDATA folder xx xx xx with a name and date Notes If you have so many tests in the Test Library they may not all fit onto 1 floppy disk Windows Explorer will tell you this and ask you to insert another new formatted disk If this happens be sure to label all disks with a name date and sequential s and keep the entire disk set together A suggestion for novice computer users is to make each folder under DIMDATA a separate floppy disk This may require more floppy disks but will make it easier to understand restoring just certain folders in the future You may just want to back up one particular folder in the test library in the DIMDATA folder or just 1 particular test You would do this the same as with co
143. his screen The inertia of each component is determined Click to check or uncheck these components to have them and displayed included or omitted from the inertia calculation f Inertia Dyno Specs x Back Fil Torque Measurement Est Required Inertia Current Readings Help Inertia Dyno Specs Sections in Main Wheel 4 M of Main Wh These numbers based on coastdown tests determine Inside Dia Outside Dia Width len weight Ibs Material 3 frictional losses in the dyno Mairfwheel 1 25 A system for more accurate Maij Wheel section 2 torque and HP numbers Maj Wheel section 3 Main Shaft IM Include Brake 855 2 Include Clutch o E N ae oa iii I 2 Total Dyno inertia from teel adding up inertia of all teel 04 components N oa Ni IV Include Misc Component A 7 IV Include Misc Component B IV Include Misc Component C I Include Misc Component D Alum This sketch shows the Alum relative size of the various inertia dyno components so you can check for mistakes Other Specs Help Enter or calculate Wheel RPM 1290 1019 Clc the total gear Time sec j0 80 180 reduction between i Gear ratio between dyno E ie HPLoss 22 eng and dyno p xx and engine is critical for Dyno Type Clutch Slip calculations Total Gear Ratio sAd tel Inertia Dyno specs for Basic w Inertia Dyno Specs Bq version much simplified Inertia Dyno
144. hods of Recording Weather Data Humidity Relative Humidity Describes the air s humidity level in percent of humidity the air could hold at its present temperature Relative Humidity can be calculated from either wet and dry bulb temperatures or from dew point and air temperature readings by clicking on the Cle button See Section 2 8 4 page 67 Relative humidity is only useful when you know the air temperature where the relative humidity is measured Since that temperature may be quite different than the air temperature going into the engine Dew Point described below is a better less confusing way to enter the air s moisture level Dew Point deg F The dew point in degrees F of the air at the track which describes the air s humidity level The Dew Point deg F must be less than the Air Temperature Dew Point can be calculated from either wet and dry bulb temperatures or from relative humidity and air temperature readings by clicking on the Cle button See Section 2 8 3 page 66 28 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Dew Point is a less confusing way of describing the air s moisture level than relative humidity Relative humidity readings are only meaningful if the air temperature when the reading was made is also known However the air s dew point remains constant even when the air temperature changes For example 40 degree air with a 80 relative humidity has only a 10 relative
145. hoose Yes and whenever you start a new test the program will not let you proceed until you have entered an Engine This is useful for shops which carefully number every engine they work on It also encourages you to use engine s which follow a certain format generally several letters followed by several s which increase in sequence For smaller shops or shops which are less fussy about engine s you may want to choose No Then you can type in most any number you want or leave Engine blank If you select this option it is strongly recommended you set Std Graph Title Created in History Log preference described above to Test File Name Printer Fonts Choose which basic type of font to use for printouts You may not get your choice if your printer does not support that particular font Tests Kept in History Log Pro version only Pick the number of tests which you want the History Log to hold from 25 to 100 Printed Graph Width of Page Due to the endless combinations of computers Windows setups and printers some printed graphs may not fill the page some may extend off the page to the right This option lets you expand greater than 100 or shrink less than 100 the printed graph to better fit the page 24 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Main Screen Graph Lines This option lets you choose the line thickness of the summary graph of Corrected Torque and HP vs
146. icking on Help or pressing What to Graph Just Power Run lt F1 gt Filtering Light some e Quit the program by clicking on File then Exit Notes Data Selected to Graph 4 types max Corrected flywheel torque Corrected flywheel HP All these options are explained in detail in Chapters 2 and 3 In the Main Screen s blue title bar you will notice the name of the current test is contained in square brackets The program has several examples of tests saved in the Test Library s Example folder right from the factory To get started let s try a couple of Menu commands Click on the Graph Make Graph Help menu command to open up the graph options menu shown in Figure 1 4 The graph settings shown in Figure 1 4 are for Corrected Torque and HP vs Select to graph vs RPM RPM on X axis here Click on the Make Graph button to produce the graph shown in Figure 1 5 At the graph screen you have several other options available for changing the graph These options are available by clicking on the commands in the menu bar or on the buttons at the top of the screen including the Help command The Help command at this screen and most screens provide a good Help for an background on what the various i i i i i overview options are For now just click on of your Back at the upper left to return to i i options for the Main Screen this screen Figure 1 5 Graph from Op
147. int Blank Worksheet Windows Print Setup Save a Test File Before you discuss saving a test file it is important for you to understand how the program opens and uses test files When you open a test from the Test Library you are only using a copy of the test The original test file is kept in the library As you make changes to the test they are only made to this copy The original file is not changed If you want to delete your changes you can simply open a fresh unchanged copy of the original test file from the Library If you want to keep your changes you must save them This can be done by clicking on File then Save You are also asked if you want to save your changes whenever you open a new test and the program has detected you have made changes to the current file 108 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Figure 3 30 Saving Test File Options New name to save test data to Leave unchanged and click OK to save to the current test name This would be the same as clicking on File then Save Click on name in the box to change it then click OK Click here to to save it to the new name Note The test name save specs must have a CFG extension That means it must Click on File to New Test end with CFG This will be added to the name by then Save As to name shown the program if you do not add it yourself bring up this Save menu Name of current test file you are working with Z DataMite D
148. ise Spikes Graph Name Ea The process of checking for noise spikes happens automatically when you start a New Test get data from DataMite or download data If spikes are found you can select to NOT have them corrected This is useful to determine the source of the noise spikes Although accuracy improves by editing the spikes out it is best to eliminate spikes at the source if you can To see Noise Spikes graph the raw data not calculated data like torque clutch slip etc vs Time with Filtering set to None See Figure 2 45 for typical Graph Specs to show Noise Spikes If you selected to have the spikes edited out when the data is downloaded it is unlikely any more spikes will be found again This edit command is most useful if you did NOT edit out the spikes when the data file was first downloaded Note Noise spikes are different that the jumpy or noisy data that filtering is designed to fix Noisy data is noisy or jumpy throughout the data file Noise spikes occur here and there and jump out from the rest of the relatively smooth data Figure 2 46 illustrates the difference between noisy data and noise spikes Some times the noise spikes are too numerous or come so close together that the program can determine what is real data and what is a noise spike In cases like this especially if the noise is in Engine RPM and absolutely if the noise is in the Dyno RPM for Inertia Dynos you must eliminate the source of t
149. l since it is flashing once When you start the engine you should see the Clear Memory LED start to flash The flash rate should increase as engine RPM is increased If not check the ignition lead for proper installation Note that when checking Engine RPM the LED will not flash for every engine firing because this would be so fast the LED would appear to be constantly on The LED changes state for approximately every 10 engine firings to slow the flash rate down Press the Record button once and the Record LED will flash twice quickly every second or so This shows it is now displaying channel 2 which is the sensor or connector with white shrink tubing The Clear Memory LED should light when the magnet passes the sensor for Channel 2 If it does not adjust the sensor closer to the magnets Be sure the Clear Memory lights for all magnets Check the other channels following the pattern described above for checking Channel 2 Figure 2 3 DataMite Setup Mode for Checking Channels Power up DataMite and wait for Record LED to light steady Push and release Clear Memory button while holding Record Button down to put into Setup Mode Setup Mode starts with displaying Channel 1 engine RPM O O LED flashes either once Record Setup Mode starts with twice 3 times etc quickly displaying channel 1 to show which channel engine RPM Push Record is being checked button to Channel 2 and LED On R di i i Flash Setup Made again to display
150. l be copied to the Master Dyno specs Do this only if all the current settings in this screen DO match the current specs of the Dyno right now and for the near future Remember that the Master Dyno specs will be used for the next test you download from the Dyno Print Click on File then Print to print this screen Torque Measurement Click on Torque Measurement to select the basic type of dyno you are using e Inertia and Acceleration which has been discussed in the previous pages e Torque Arm discussed in Section 2 6 1 on page 55 and calibrated in Appendix 5 e Hydraulic Pump Pressure discussed in Section 2 6 2 on page 56 53 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Because the method of Torque Measurement is at the heart of any dynamometer DO NOT change this spec unless you are setting up a completely different type of dyno See Sections 2 6 1 and 2 6 2 for non Inertia types of dynos Est Required Inertia Figure 2 22 Required Inertia Menu f f f Required Inertia x Click on Est Required Inertia to be presented with a screen shown in Figure 2 22 This screen will calculate how much dyno inertia is needed Required Inertia 362 27 to provide a certain acceleration test time for various amounts of engine Cunent inertia 69 89 torque Accel Time for Current Inertia Max Inertia Wheel RPM Testing Estimates Is the dynamometer Inertia needed to provide the acceleration rat
151. le Comments l Miscellaneous Use Engine if Available else Test File Name Torque HP decimals gt ex 431 14 HP for your needs Preferences When Getting New Data from DataMite may also save time by Automatically Edit Out Noise eis aE KNER KN eliminating steps you don t require Display Lap Summary Printer Fonts Typical Dot Matrix Require Engine for New Test o hs Tests Kept in History Log Printed Graph Width of Page 100 BG E Program Title Com ments OK Canal Help Main Screen Graph Lines Thick Main Screen RPM Increment 250 Restart Showing Help Ti F Enter most any text here Restart Showing Help Tips Main Screen Filtering Level Light for the First and Second Test Folder Name in Program Folder lines These 2 lines will appear at the top of printouts and printed graphs This is a good place for your business name or your personal name You can change these entries as often as you wish i KNK When Getting New Data from DataMite Automatically Filter Out Noise Choose Yes for Automatically Edit Out Noise and the program will automatically remove noise spikes from each new test you record from the DataMite This is good for beginners Choosing No can be useful to troubleshoot the source of the noise Display Run Summary Choose Yes for Display Run Summary and the program automatically shows a summary of how it
152. le you will Edit for editing the DataMite s test data a as shown in Figure 2 41 For all 3 LAI DataMite Data Analyzer 2 0 Performance Trends REEDUS CFG of these Edit commands you will File Edit Graph Report TestConds Engine DataMite Dyno Preferences Hel edit the Current Test which is the pe Se ae ry RE test which is named in the square g g brackets at the top of the Main Redetermine Beg End of Runs 1 Edit Out Noise Spikes Screen Test Comments Parilla TT Delete Beginning or End of File This option lets you delete portions of the recorded data and keep some main section This is useful as it can create smaller data files saving disk space on your computer or saving time when doing calculations for graphs or reports If you save each kept portion to a new file name you can actually use this command to break up data file into several smaller data files This can make it much easier to compare one run of a test to another run of the same test if instead each run is a separate test Figure 2 42 Cut Beginning or End of File Screen showing cutting 1 run from a test with 2 runs Click on OK keep this DataMite Analyzer v2 0 REEDO9 CFG section if you want the OK Keep this section Cancel Erase Outline Help outlined section of the Help Click and Drag Mouse to outline the portion of test to be kept Then click on OK keep this section to keep only the section test to be saved outlined Click on
153. librating an Analog Sensor Coastdown Test 117 119 135 147 149 159 165 169 175 179 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction Chapter 1 Introduction 1 1 Overview of Features The DataMite data logger hardware and Dyno DataMite Analyzer software by Performance Trends Inc is a system to let racers engine amp chassis builders and motorsports enthusiasts measure dynamometer data The Dyno DataMite Analyzer can analyze this data with graphs comparison graphs and reports This analysis lets you calculate torque and HP clutch slip temperatures pressures etc to detect performance differences from engine modifications The software is available in 2 versions Basic and Pro The Basic version has fewer options and features to make the program easier to operate In the Pro version you have additional data recording and analysis features Should you start with the Basic version you can easily update to the Pro version later The DataMite and Dyno DataMite Analyzer software provides sophisticated data acquisition and computer analysis at a fraction of the cost of other systems The Dyno DataMite system s major features are listed below Basic Features e Capability to configure and calibrate the software for most any combination of sensors you have installed on the DataMite data logger e Capability to tailor the program to work with most any type of dynamometer including ine
154. libration describes how the DataMite should convert a sensor input into useful information like 2 2 volts is 34 ft lbs of torque When you save the dyno test the program saves a copy of the DataMite Specs with the test Lets call this test TestCh4 and assume it was run with a 4 Channel DataMite There are 2 settings which do not match your current Master DataMite Specs the DataMite you use to record your data Lets say several months later that you buy a new DataMite II 27 Figure 2 13 Illustration of Master DataMite Specs Channel system Or you could have changed any DataMite spec different sensors different calibrations etc Your current DataMite II specs do not match the Test File TestCh4 A Test File contains the raw DataMite data and other specs to calculate Tq and HP and analyze results specs for TestCh4 If you open The program keeps the old TestCh4 the program i separate records of your installs the 4 Channel DataMite Pe Master DataMite Specs specs which you used when you ran 2 the specs describing the that test This lets you accurately saa DataMite you are calculate torque and HP and other z currently using These data just as you did when you first Master DataMite Specs ran the test are used whenever you start a New Test If you go into the DataMite Specs menu you will likely get a message shown in Figure 2 12 saying that the DataMite Specs for TestCh4 do not match you
155. ll y Engine RPM Dyno RPM Se Click and drag mouse to outline the portion of the graph you want to fill the entire graph screen the portion you want to zoom in on ey eo 25 0 Time sec 137 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 26 Graph After Zooming In with the Mouse as Done in Figure 4 25 Click on Full View to w DataMite Analyzer v2 0 YAM 1000 CFG return to the original Back File Format View GraphType AddTest HistoryLog Single Test Help scales where the lal By la ee eo Lelle belo cit vafinn srl a Engine RPM Dyno RPM vs Time determined by the program This is called auto scaling Another way to zoom in is to click on Set Scales and manually enter the scale limits Pro version only The portion of the screen outlined is Figure 4 25 with the mouse now fills the entire graph screen Click on these Time Align buttons to shift one of the tests over another The amount of shift is shown in the legend The test v Show Adjusted Timing gt rie i pati Ae ra Show Original Timing 3 Reset Timing to Original Timing Paine RPM 00 32 seconds for ning Shift Size 001 Seconds Dyno RPM 00 good alignment with v 01 Seconds the 9 75 test One 1 Sesa button is hidden by the View drop down menu Click on View then Timing Shift Size to increase or decrease the amount of time shift which occurs for each cli
156. load arm force as shown in Figure A5 3 Follow the instructions with the sensor for wiring and mechanical hookup Turn on the DataMite and let the system warm up 2 Pick the Analog Channel from the DataMite Specs Screen Click on the channel with the torque load sensor installed as shown in Figure A5 5 This will open the Calibration Screen shown in Figure A5 6 Figure A5 5 Open DataMite Specs Menu Click here to open DataMite Specs menu IA DataMite Data Analyzer 2 0 Performance Tsznds_ YAM 1000 CFG File Edit Graph Report TestConds Engine DataMite Dyno Preferences Help Click on this Data Mite Specs column in Test amp E Back File Current Readings Help row for channel with the Channel Settings torque load Engine RPM Yes EngRPM i sensor 2 Frequency Yes Chnl 2 installed 3 Frequency Yes Chni 3 Analog td Themocoupe Frequency Chnl 4 Not Being Used Tip Help Click on most anything in the Channel Settings grid to Click on the down arrow button to select the change it For Used you will toggle between Yes and type of DataMite you are using You choice No For Data Name and Sensor and Calibration you here will affect which specs are enabled or will be presented with new screens to change the disabled in this menu p15 current settings 171 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies In the calibration screen of Figure A5 6 select Analog Converter
157. may have fallen off 162 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies e Wrong calibration for an Analog channel See Appendix 5 Recorded Data Good Calculated Data Bad Calculated data includes these types Torque HP Clutch Slip These data types are all based on the settings in the Test Conds DataMite and Dyno Specs menu Check these settings and their definitions in Section 2 3 2 5 and 2 6 If the problem appears with the graphs be sure you are reading the graph correctly Sometimes data types are multiplied by 10 100 etc so data types which are very different can show up on the same plot For example 15 ft Ibs of torque may be multiplied by 1000 so it shows up well on a graph which also includes Engine RPM up to 15 000 Use the Cursor option to read the graphs which corrects for the multiplier See page 98 Or make a report of the data type to eliminate the need for any multiplier Calculated data types usually need some filtering If the calculated data looks noisy or jumpy increase the filtering level to Medium or Heavy See Figure 2 46 and 2 47 on pages 78 and 79 and Figure 3 14 on page 93 If the problem is with Clutch Slip check that the Gear Ratio is correct in the Dyno Specs menu See Section 2 6 If torque and HP look too jumpy e The magnets may not be evenly spaced e There may be some or even just 1 very minor noise spike in the inertia wheel RPM See Figure 2 46 on page 78 to see how
158. mber Cis mn Hood 1 Cylinders Q particular menu you are using Rod Length CR Piston Dome CCs i z Gasket Thickness in The input values or calculated values esdi ies Gote Lees E a T Sf aske ore Via in in any calculation menu have NO Block Stock Cast Iron affect on calculated performance pj Piston amp Rods Deck Height Clearance in unless you load the Calculated value Crank Wt amp Descr 35 ibs Notes i igi SSS T T a T This calculation is based on the existing Short into the original SILU Ify se eae Uz Di a_i ain Block specs of a Bore 4 and Stroke 3 If this already know a spec in the form r lanit is incorrect change these specs before using this gnition meni required by the program then you Distributor Stock TFI Enter a negative Dome CCs for a Piston Dish Enter a negative Deck Height Clearance if the have no need to use the calculation menu For example if you know the Spark Plugs piston goes above the deck at TDC ee Gap 044 Timing kie Compression Ratio is 10 3 you have Use Calc Value Help Cancel Print no need to use a calculation menu to Hag calculate Compression Ratio based on Gasket Thickness Piston Dome CCs etc 2 8 1 Calc Compression Ratio Is the Compression Ratio calculated from the following specs and the current cylinder volume based on the current Bore and Stroke in the Engine menu See page 63 for general notes on Calculatio
159. me time The DataMite Analyzer s time aligning feature lets you do this relatively easily First lets zoom in on the acceleration part of the test after you go full throttle This can be easily done by clicking in the upper left corner of a section of the graph and holding the mouse key down Then drag the mouse to the lower right corner of the section you want to zoom in on You will draw a box outlining the portion to zoom in on See Figure 4 25 136 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 24 Checking Data Quality of Both Tests Being Compared Note that in this graph the program decided Back File Format View GraphType AddTest HistoryLog Single Test Help NOT to multiply Dyno lea Bl allay ees ee Lele dai belo ciel Futview setseste RPM by 10 as it did in Engine RPM Dyno RPM vs Time yam 1000 all Figure 4 23 Therefore Engine RPM dyno RPM looks much Dyno RPM smaller compared to yam 975 all Engine RPM in this Engine RPM Dyno RPM graph et a a te asama The YAM 975 test shows no noise spikes or other types of problems in the Dyno or Engine RPM data and therefore has high data quality nc aad ate SAP steer awn areal Se aT SS et ore ee te Time sec Figure 4 25 Zooming in on a Portion of the Graph w DataMite Analyzer v2 0 YAM 1000 CFG Back File Format View GraphType AddTest History Log Single Test Help yam 1000 all Engine RPM Dyno RPM am 975 a
160. measurement was made For example if the weather service or weather report gives a relative humidity of 56 and a temperature of 68 degrees use 68 degrees This is not the temperature of the air which enters the engine Outside Rel Humidity Is the air s relative humidity as reported by a weather service or measured by humidity instruments Dry Bulb Temp deg F Is the temperature of the dry bulb thermometer on the psychrometer in degrees F This is also the temperature of any thermometer mounted in the shade when the Wet Bulb Temp reading is taken The Dry Bulb Temp must not be less than the Wet Bulb Temp Wet Bulb Temp deg F Is the temperature of the wet bulb thermometer on the psychrometer in degrees F The wet bulb has a wick or cloth covering the bulb which is moistened with water The dryer the air the greater the difference between the wet and dry bulb readings Relative humidity or dew point can be manually read off a Psychometric chart from these two readings This calculation replaces reading the chart The Wet Bulb Temp must be less than the Dry Bulb Temp 66 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 38 Calc Relative Humidity 2 8 4 Relative Humidity Depending on your choice of Method of Recording Weather Data you Calc Relative Humidity will be entering either Dew Point or Relative Humidity in the Test Conds menu This is the Calculation Menu you will get if you are
161. menu where this data is contained Correction Factor Is the correction factor based on the Weather Specs entered in the Test Conds menu Click on this item to display the Test Conditions menu where this data is contained Test Time and Date This records the time and date at the time you downloaded the test from the DataMite When a dyno test is started with the New Test command click on File then click on New Test at the Main Screen the computer s current time and date are saved as the test time and date The test time and date can also be changed by clicking on it here at the Main Screen Pk Tq Pk HP Is the highest torque and HP reading for the test Note that this can change if you change the RPM increments or the Filtering specs in the Preferences menu Section 2 2 Figure 2 5 Operator Name Menu O pe ra to r New Operator Current Operator ack This is the name of the operator who ran the test Click on this item for the menu of Figure 2 7 to be displayed where you can type in a new operator Pick An Operator i Operator a name or choose from one you have previously entered It is always ca ack E recommended you first check the list of existing operators so you do not end gt New Operator up with several names for the same operator For example Bob Bobby and Enter a New Operator Robert may all be for the same guy When you go to look for tests run by Rena Bobby in the future the Pro version
162. mory LED flash to indicate tach pulses are entering the DataMite The flash rate increases as you blip the throttle and engine RPM increases The Engine RPM signal looks good Note that it takes about 10 engine firings to get the LED to either light or go out Therefore the flash rate may be slower than you expect To check out the dyno wheel RPM sensor press and release the yellow Record button once holding it down for about half a second Now you see the Record LED flash twice then remain off for about a second This new flash pattern repeats The 2 flashes show the DataMite is checking out channel 2 or the dyno RPM Ifthe dyno wheel is spinning you should see a flash each time a magnet passes the sensor Otherwise rotate the dyno to place the magnet over the sensor and leave it there The Clear Memory LED lights and remains on Channel 2 or the Dyno Wheel RPM looks OK Again press and release the yellow Record button once holding it down for about half a second Now you see the Record LED flash three times then remain off for about a second This new flash pattern repeats The 3 flashes mean you are now checking Channel 3 Check it also as you did Channel 2 above 119 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 1 DataMite Setup Mode Power up DataMite and wait for Record LED to light steady Push and release Clear Memory button while holding Record Button down to put into Setup Mode Setup Mode
163. n Menus and for an example of their use The equation for Compression Ratio depends on the cylinder displacement swept volume This displacement is based on the current Bore and Stroke in the Engine menu and is displayed in the Notes section at the bottom of this menu Make sure these specs match the engine for which you are calculating Compression Ratio before using this menu 63 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Chamber Specs Chamber CCs in Head Is the combustion chamber volume in the cylinder head measured in cubic centimeters This is the value obtained if the heads are cc d If you know the entire clearance volume of the cylinder but do not know Piston Dome CCs Gasket Thickness or Deck Height Clearance enter that volume here as Chamber CCs in Head Then enter 0 for Piston Dome CCs Gasket Thickness and Deck Height Clearance The program will calculate compression ratio based on the equation below where Clearance Volume is the Chamber CCs in Head Compression Ratio Clearance Volume Swept Volume Clearance Volume Piston Dome CCs Is the volume of the pop up in the piston measured in cubic centimeters The pop up is the volume of piston material added to the top of a flat top piston If the piston has a dish depression enter the dish volume as a negative number Gasket Thickness in Is the thickness of the engine gasket in inches after it has been crushed Cr
164. n system as this will be very unsteady Use a solid ground source Do not ground the DataMite to a terminal which also grounds the ignition system as this will also be very unsteady Make sure the engine is well grounded to the dyno frame and the dyno frame is well grounded to earth This would mean a large ground strap which connects to a ground rod driven in the ground or 2nd choice a copper or at least metal cold water pipe RPM Data Looks OK but Too High or Too Low If engine RPM looks like it is exactly half a high one third as high three times too high etc as it should be read the definitions for Cylinders and Engine Type on page 43 The DataMite s microprocessor is constantly trying to make sure Engine RPM is clean and free from errors If engine RPM is changing VERY rapidly for example on engine start up from 0 RPM then it flares up to 3000 RPM the DataMite may not think this is possible and can jump into a half RPM mode or third RPM mode by mistake Usually the DataMite will recover from this by itself if you run normal RPMs for a while a few seconds With Inductive Pickup signals if the inductive pickup signal is too strong you wrap the spark plug wire too many times you may not be able to record Engine RPM at high RPM Engine RPM may drop in half or all the way to 0 RPM For the other RPM signals the problem may be e You may be specifying the wrong magnets See page 44 e A magnet
165. n the History Log or pick different file s to araph Click here to zero out the amount of shifting you have done Click on Timing Shift Size then select the amount of time you want the selected test to shift for each click on the Shift Button Note You can also hold the Shift key down while clicking the shift button to shift a much larger amount 101 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 102 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 3 4 Printer Output The Dyno DataMite Analyzer can print the tabular test results of a report for a permanent hardcopy by clicking on Print in the menu bar or the Printer icon The menu of options shown in Figure 3 25 will appear Check the options you want to use for the printout by clicking on any or all of the Option boxes All options and buttons are discussed in this section Figure 3 25 Printer Button and Print Menu Command Options Report Screen lA DataMite Data Analyzer 2 0 Performance T Click on Print or the Printer button gt k Report T File Help F1 shown hidden here for the Printout i Print aiea E iaa E Options menu shown to the right Print Results Ctrl P This options lets you choose the Windows Printer Setup printer or printer driver being used by Windows and also page orientation Print Reports Options x Check or uncheck these options then click on Test Results Report Options 7 this butto
166. n to chan h f h or runs you want to graph a number from 1 io the number in the adjacent Runs column 114 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output EeEEIEEEeEI EESEEE EEE EEE ESESSEE EEE EEE EEE EES SSX e Click on Graph Title to change the Standard Title for this test The program has 2 defaults for naming a file in the History Log which you can select in Preferences See Section 2 2 It is either 1 the test file name without the CFG extension or 2 the Engine unless it is blank when it then puts in the test file name without the CFG extension You can also specify Alternate titles and legend names by clicking on Format at the top of the Graph Screen then Edit Titles Legends e Choose to Save certain results you believe are special and you may want to recall or graph in the future See the Save explanation of the previous page e Choose which run or runs you want to graph by clicking in the Graph Runs column The program will ask which runs you want to graph Enter the number for each run separated by a comma See Figure 3 35 Most of your tests will probably be for Figure 3 35 Specifying Which only 1 run so there is no need to specify the Run The program Runs to Graph if more than 1 run defaults to Run 1 if there is more than 1 run ina test Enter Run s Ea Enter the run s to be graphed separated by a comma For example to C I graph runs 1 and 3 _Cancel enter
167. n to print the IX Include Test Conditions current report with these options See page 141 in manual for more info Test Results Report Options Include Test Conditions Include Engine Specs Pro Version Only Include DataMite Specs Include Dyno Specs Select these options if you want all the specs from these menus printed with the report This will add 1 2 pages to the printed report 103 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Include Test Comments Select this option if you want all the comments for the Test File printed with the results Request Report Comment Select this option if you want to be asked for a comment for each particular report you send to the printer These report comments are useful to identify important points for future reference like engine modifications special test conditions etc Larger Font Print Size Check this option if your particular printer is printing the results with a small print font This option will increase the font size for some parts of some reports Also see Preferences for Selecting Printer Fonts page 24 Figure 3 26 Print Commands under File Options Pro Version Onl as DAEM w Engine Specs YAMAHA File Edit L Back Filg New Engine ae Open Example Engine oToeprinted La Click on File in either Open Engine the Engine Spec menu Save Engine Cam amp Heads to display these Print Save Engine As Options Heads
168. ndard Test Library and are not be asked for a new Folder name to add to the list of searchable using the Filter options Folders discussed in Section 3 6 To save a Test File you will be presented with the Save Window as shown above The program suggests a new test name which is the same as the current test name shown at the top of the Main Screen If you want to save your changes to the same name simply click on OK This will update the current test file with your latest changes If you want to save the current set of test specs with your changes to a new name and leave the current test file in the Library unchanged then click on the suggested file name and modify it as you want For example in the window shown above you may want to add 2 to the current name CAMTEST to create CAMTEST2 to indicate this is the 2nd revision of CAMTEST This is the safest way to make changes because you can always return to an earlier version and see what you had done The test name must have a CFG extension That means that the test name can be most any name of up to 8 characters or numbers but it must end with the 4 characters CFG If you do not add the CFG to the name itself it will be added to the name by the program Other types of file names which are not acceptable include e Names with more than 8 characters or 8 characters to the left of a period if you include the CFG extension e Names which include the characters
169. nds at the top of the Main Screen you can be presented with a screen of specs Figure 2 3 shows the screen for the Pro version s Engine Specs Figure 2 3 discusses some of the commands to enter or change settings at this menu Before Running Your First Dyno Test It is recommend you becoming very familiar with the Dyno DataMite Analyzer before starting real tests Points to consider include e Be sure your DataMite is installed correctly is recording data properly See Appendix 2 e Review the proper procedure for performing a test as outlined in Example 4 1 e Become familiar with how to validate your data to ensure the raw data that was recorded is correct as shown in Example 4 1 and Appendix 3 Troubleshooting Important The raw DataMite data must be correct and free from defects for the calculated torque and HP to be correct Become familiar with the way to check the raw DataMite data shown in Example 4 1 12 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 3 Explanation of Sections of Typical Menu Engine Specs menu shown which is only available in the Pro version Names of component specs Click on them for a description in the Help frame in the lower left corner Name of component file displayed in this menu Standard text entry box where you can type in a number for a spec For many others in this screen like Head s Cam etc you can type in most any descriptive words you want o
170. ngine RPM at the end of the test at which you close the throttle to stop the test Desired Accel Time sec Is the time for the engine to accelerate from the Starting Engine RPM to the Finish Engine RPM Generally you want this time to be from 6 to 12 seconds If you go quicker than 6 seconds the data will not be as accurate Total Gear Reduction Is the total gear ratio between the engine and inertia wheel This should be the Gear Ratio you have entered in the Dyno Specs menu and is set to this when you first open this menu Current Readings Click Current Readings to display the a screen showing current readings for most sensors This screen can be very useful for troubleshooting problems with signals or for watching the engine through a dyno test like a tachometer See Section 2 7 for more details Help Click on Help for help on this screen Figure 2 23 Torque Arm Type of Dyno Absorber impeller or armature connects to engine 2 6 1 Torque Arm Torque Torque Load x Torque Arm Length Measurement This is the type of dyno most people are used to The engine s crankshaft is connected to an absorber like a pump generator etc The power absorber s outside case can float in bearings A torque arm is attached to the absorber case which prevents the absorber case from turning The force in this arm is measured and then knowing the distance from the center of the absorber out to the torque arm torque can be calculated Se
171. nloading DataMite Data A DataMite Data Analyzer v2 0 Performance Trends YAM 925 CFG 1 The DataMite data File Edit Graph Report TestConds Engine DataMite Dyno Prefereyfes Help is sent in several packets for each channel The more w Read Com Port data that was Test amp Engine Conditi recorded the longer 5 047 Bore f Getting data from Data Mfe 1 19 Model 67 the downloading B15 Stroke i 5 37 cid 2 Cycle g 195e bytes Getting Channel 3 dar takes 013 Corr Factor Packet number 4 Click here to stop the downloading Test Data corr to 29 process and abort a starting a New Test 128 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Analyzing Data The Main Screen should now look like Figure 4 14 with a graph of the dyno run on the right side and a table of corrected torque and HP numbers on the left side The specs which determine the RPM increment for the data table or how much filtering smoothing should be done to the data on this Main Screen are in the Preferences menu See Section 2 2 Preferences Checking Data Quality You should always look at your data with a skeptical eye Always try to make the data prove to you that it is good and accurate A first step in this process is to check the quality of the raw data recorded For an inertia dyno that is the Engine RPM and Dyno RPM The easiest and best way to check data quality is to graph these 2 channels vs
172. o DataMite Analyzer Chapter 3 Output 3 2 ASCII Data Files Pro version only You may want to use the results from the Dyno DataMite Analyzer in Figure 3 10 ASCII Files Options Menu other software packages This could be for additional graph Click on File from capabilities statistical analysis data basing etc Once you have Report Screen for created a report as shown in Section 3 1 click on File to write the ASCII File menu results to an ASCII file with a name of your choosing The ASCII File command is possible any time a report is displayed on the screen DataMite Data Analyzer 2 0 Performance Trends REH Back Print Report Types File Help F1 Operator Tom 5 22 am 04 You can only save the results currently displayed on the Report screen 3 Send Cit Eng Cor To 2 If you want to write an ASCII file of a test file you have previously run Customer Peterenn Corr a Save as ASCII File x you must open that test file first then create a report for that test file 10 ASCII File Options i 10 ASCII File Options n F Comme Seperated mE Include Text 07 Convert to Columns Comma Separated 10 Woz FileName 00 Select this option to insert commas between data points Leave this z Save File i unchecked for data to be arranged in evenly spaced columns 300 100 Te ca Enter a valid file name no path to save ASCII file to Engine Analyzer directory Include Text i00 Refer to page 98 and 102 in U
173. o Specs which should match your current DataMite and Dyno setup This will be the same no matter what previous test you are starting from If the current test is not a good pattern for this new test you can abort starting this new test by clicking on Cancel don t start new test at the top of the New Test screen Then click on File at the top left of the Main Screen and select one of the Open options to open a past test to serve as a pattern Figure 2 40 New Test Menu 5 Critical specs for the new test are listed here at the top Click here to start a New Test based on these settings and start downloading data from the DataMite Starting a New Test Start New Test Cancel don t start new test Help Operator p Engine Folder for New for New Pick for New _Assign Name for THEE E Test ER Which E to Keep based on current file CFG See Specs Type 4 Channel DataMite See Specs Inertia Dyno 69 9 Ib x ft 2 Keep this box checked if you want to copy the current test s Engine Specs to the New Test File Name Type of Test Dyno Engine Sge Specs Keep this box checked if you want to copy the current test s Test Conditions to the New Test TestConds fee Specs Keep this box checked to use comments below for New Test Yamaha box stock 89 Test Comments Cut head 032 squish 11 1cc Onte a New Test is started you can easily erase or modify any of the specs listed above Ani spe
174. o Specs shown in Figure A6 1 It is critical that the engine is not attached to the dyno during the coastdown test If your dyno system has a one way clutch this is fairly easy to do Figure A6 1 Dyno Specs Menu for Loading Coastdown Results w Inertia Dyno Specs Back File Torque Measurement Est Required Inertia Current Readings Help Click here es Sections in Main Wheel it of Main Wheels x for the screen Inside Dia Outside Dia Width len Weight Ibs Material Inertia Total shown in Main Wheel section 2 Main Wheel section 3 Main Shaft IV Include Brake IV Include Clutch ao o IV Include Misc Component 4 Tl Include Misc Component B Load in the T Include Misc Component C results from T Include Misc Component D the Coastdown Total Inertia 72 24 Test here l Other Specs Help See Section Select parts with 2 6 Dyno Wheel RPM 1290 1 1010 different thickness in Specs for Time sec lo so 180 main wheel p xx more details HP Loss 23 14 07 Total Gear Ratio Cid Inertia Dyno Specs Note If you have not done an accurate coastdown test on your dyno it is best to enter 0 for all 6 coastdown specs to cancel out this correction Manual Procedure 1 Get a stop watch and set it to zero Warm up your dyno system spinning the wheel to the approximate bearing temperatures you think you will see during your dyno testing 3 Click on Current Readings at t
175. obably won t actually do a coastdown test until you get familiar with your DataMite and Dyno system lets assume you do a coastdown test before you run your first dyno test to help you estimate the aerodynamic and frictional losses in the system See Appendix 6 for more details Since your dyno system has a one way clutch this is fairly easy to do 1 Get a stop watch and set it to zero 2 Warm up your dyno system spinning the wheel to the approximate bearing temperatures you think you will see during your dyno testing 1 11558 EngRPM 1 Cylinder 2Stroke 3 18401 8401 Other RPM 1 Magnet 3 Click on Current Readings at the top of 5 1558 _ NE r 18401 EEEE the DataMite or Dyno screens to display z nae Deae a tachometer for the inertia wheel Install Optical Isolation Box for this screen to avoid possible computer damage 4 Accelerate the inertia wheel to the highest safe RPM you will encounter during your dyno testing 5 Disengage the engine and let the inertia wheel coast down DO NOT brake the inertia wheel or do anything to add drag to the system Disengaging the engine is easy with this one way clutch dyno because the act of simply closing the throttle disengages the one way clutch Note that the drag of the one way clutch does add some drag to the system over what would normally be present but this can not be easily avoided 6 Soon after the wheel starts to coast start the stopwatch and note the dyno RPM at that time
176. of magnets or targets if a different type of sensor is being used on the rotating component Keep Specs Help Cancel Print for channel 3 You would open this menu twice once for each channel you want to change Specify 1 magnet since that is what you installed on the inertia wheel Using just 1 magnet avoids the problem of not getting the magnets evenly spaced For DataName you can change it to something you think is more descriptive or simply leave them at their default names of Eng RPM Chnl 2 and Chnl 3 For the Sensor and Calibration descriptions see what is outlined in Figure 4 3 When you are finished click on File then Save as Master DataMite Specs to save these changes Then click on Back to close the DataMite 121 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples EE Specs menu You will probably be asked if you want to keep these changes for the current test YAM 925 Since they were not the DataMite specs for that test answer No Now when you start a New Test and download data from the DataMite these Master DataMite specs you created and saved will be the ones used for determining what channel is recording what Now do the same for the Dyno Specs as you did for the DataMite specs Click on Dyno to obtain the screen shown in Figure 4 4 Again these were the Dyno specs for the YAM 925 test You should enter the specs for your inertia wheel system Your inertia dyno s singl
177. oke Frequency Yes Chnl 2 Dyno Wheel RPM 1 Magnet 3 Frequency Yes Chnl 3 Other RPM 1 Magnet Frequency Yes Chnl 4 Analog Std Thermocouple 4 Channel DataMite l Tip Click on most anything in the Channel Settings grid to change it For Used you will toggle between Yes and No For Data Name and Sensor and Calibration you will be presented with new screens to change the current settings Click here to bring up the Sensor and Calibration screen for defining each channel as shown in Figures 2 15 and 2 16 Click on the down arrow button to select computer s Com serial port you are using to talk to the DataMite This spec is used to hold the last Com port the computer used to talk to the DataMite If this particular port does not work the program automatically checks all Com Ports on your computer 1 4 Therefore a mistake here is not critical but can save some time when downloading by avoiding looking at all Com ports Channel Settings Channel This column describes the type of data recorded with this channel like RPM On Off Switch Analog Input etc You can not change what is in this column as this is determined by your choice of the Type of DataMite Used Click on this column to set it to Yes or if it is already Yes to blank it out which means it is not currently being used Data Name Click in this column to bring up a screen which simply asks for a new name for this data c
178. ol panel and the DataMite module can NOT be lengthened However the panel can be removed from its enclosure and mounted directly in a cutout in some type of panel This is best done with screws can use those provided with the plastic enclosure or pop rivets 5 Determine Cable Routing It is recommended you do not lengthen or shorten the DataMite harness unless you solder and shrink tube all connections and are familiar with good electronic cabling practices Therefore be sure all wiring reaches the dyno ignition power and ground This may effect where you mount the DataMite module Excess wiring can be coiled in a location by the DataMite away from the engine s ignition system See Figure A4 4 for an overview of the wiring 6 Install Wiring Harness with 110 VAC Power Supply See Figure A2 2 With the harness NOT hooked up to the DataMite module string the connections and RPM sensors to the intended locations You may have to change the standard connectors supplied with the harness Most dynos will use the 110 VAC power supply This must be wired up differently than a DataMite vehicle system Connect the black ground cable to the black side of the power supply s mating connector If you are using an Inductive Pickup DO NOT attach this ground to the dyno frame or the engine block Grounding to the dyno or engine can damage your computer If you are connecting directly to an ignition coil or an ignition box like an MSD you may need to
179. ome of the basic graph screen items Figure 3 12 Primary Graph Screen Items Command buttons Some commands can only be done through these buttons some of these buttons just provide a graphical button for performing action of some menu items Menu bar provides for several graph commands and options Graph Title which can be changed by clicking on Format then Edit Titles Legend Pro version Name of current Test File containing all dyno data and specs Graph Legend which describes the data w DataMite Analyzer v2 0 REEDOS CFG xf graphed This includes Bafk Fie Fojnat View GraphType AddTest HistayLog ShgeTet Hee Name of the Test Results Eel eee eA eee fie the particular Dyno Corr Tq Corr HP vs RPM vam1oofoo03 1 Run graphed Type of T Data which data goes with which file if any multiplier is applied to the data You can also click on Data Type names and the corresponding data line will flash This is useful to find a particular line when several are graphed In the Pro version names in the Legend can be changed by clicking on Format then Edit Titles Leaend The Dyno Run or All if all data is graphed is included in the Test saoo 6400 7poo sdoo ss00 As 11200 12000 12800 13600 1440015200 RPM Name 1 L 1 Fe 1 1 1 e r i 1 1 i f 4 4 b sasap ee ae Horizontal X axis The scaling of this axis can be easily changed as describe
180. ons Help Click on the Options menu item to open a menu where you can select which channels to view on the gauges and the range of the gauges For example if you want to see Dyno Wheel RPM you would probably pick an range like 0 2400 However if you were to watch Engine RPM you would probably pick a range like 0 12000 RPM because Engine RPM would go much higher than 2400 RPM See Figure 2 32 2 4408 Dyno Wheel RPM 1 Magnet Click on Options to change the screen update rate or what is displayed on the 2 gauges and the gauge scales 1 EngRPM 1Cylinder 2Stroke 3 4690 Dyno Wheel RPM 1 Magnet 4 Analog Std Thermocouple Install Optical Isolation Box for this screen to avoid possible computer damage IMPORTANT It is strongly recommended that you purchase Performance Trends Optical Isolation box if you use this screen while dyno testing an engine This will prevent voltage spikes from the engine passing back through the DataMite to your computer possibly damaging the computer Click on Options to either select to e Change the update rate of this screen e Change what is displayed on the gauges Change the update rate of this screen Click on Options then Change Update Rate currently x to be presented with the screen of Figure 2 31 Enter any number between and 10 to specify the number of screen updates per second On slower computers you may want to specify a low number like or 2 This can produce mo
181. options Windows Printer Setup Unlock Program Options Transfer Program to Another Computer j j j j lt Exit Program Ctrl Click on Unlock Program Options to obtain codes to give to Performance Trends to permanently 8000 10000 12000 14000 16000 unlock the program take out of the 10 day demo C Performance Trends Inc 2000 From this Main Screen you can e Choose to review your options by clicking on the menu items at the top of the screen e Open or save a file of test results and specs by clicking on File in the upper left corner and then the Open or Save commands e Edit or review test data settings or comments for the file you are currently working with e Graph or report the test for the file you are currently working with e Change the Preferences options to somewhat customize the program for Dyno DataMite Analyzer Chapter 1 Introduction Figure 1 4 Graph Options Menu Select Data Types in this section Graph Name Engine Accel RPM sec Dyno wheel RPM Caled gear ratio Clutch converter slip Observed flywheel torque Observed f Corrected flywheel torque Corrected flywheel HP Other Graph Specs your needs e Click on File then Unlock Program Options to obtain codes to give to Performance Trends to permanently unlock the program take out of the Time or RPM Graph 10 day demo mode See Section 1 4 e Get HELP to explain these options by cl
182. orque In the Pro version you can also get into more details describing the dyno and any power losses in the system to make the torque and HP measurements more accurate The entries in this screen are critical to accurately recording data Figure 2 18 Typical Note on Master Dyno Specs Master Dyno Specs Settings DO NOT Match the Master Dyno Specs A critical concept for Dyno Specs is the idea These Dyno specs were used for the current test of the Master Dyno Specs When you GRRATO44 CFG download data from the DataMite you are using a particular Dyno Setup When you There are 1 settings which do not match your current Master Dyno Specs the save the dyno test the program saves a copy Dyno you use to record your data of the Dyno Specs with the test Lets call this test GrRato44 and assume it was run with a 4 4 gear reduction Lets say several months later that you test a higher RPM engine and you install a 6 2 gear reduction Or you could have changed any Dyno spec different inertia wheel size etc Your current Dyno specs do not match the specs for GrRato44 If you open GrRato44 the program installs the 4 4 gear ratio Dyno specs which you used when you ran that test This lets you accurately calculate torque HP clutch slip and other data just as you did when you first ran the test Figure 2 19 Illustration of Master Dyno Specs A Test File contains the raw Dyno data and other specs to calculate Tq and HP
183. ou can calculate the torque you put on the dyno Figure A5 3 Torque Arm Type of Dyno Absorber impeller or armature connects to engine Torque Load x Torque Arm Length Load is measured here as a force or a pressure Absorber Case Floats in Bearing Torque Arm Length You may have gotten a calibration kit with your absorber dyno to do this If not you will have to make one There are basically 2 ways to do this shown in Figure A5 4 If you bolt a calibration arm to the dyno case you will probably add a certain amount of torque to the dyno unless the arm is perfectly balanced from side to side The additional weight of the arm does not matter as it is absorbed in the bearings holding up the dyno itself Figure A5 4 Types of User Fabricated Dyno Calibration Kits Temporary Calibration Arm Must be perfectly balanced so it does not add a torque when you install it Bolt to Temporary Arm can be removed when done Hang weights from here Torque Arm for calculating calib bration torque Permanent Calibration Arm Must remain installed after the calibration is done since it adds a torque to dyno Bolt to Dyno Case Hang weights from here Torque Arm for calculating calib bration torque The permanent Calibration Arm method of Figure A5 4 is more accurate as you don t have to be so exact about the balance of the calibration arm If you choose that method be sure the arm does not stick out so much
184. ould have added them by opening the History Log and manually putting a Yes in the Graph column See Section 3 7 History Log Reports Another useful analysis tool are the reports Reports are convenient because a complete dyno run can be summarized in just one number like Average Corrected HP Click on Back at the top left of the Graph Screen to return to the Main Screen Then click on Reports and select the Report Options menu shown in Figure 4 35 From the graphs you can see that the highest HP readings are in the 7000 to 15000 range Therefore you set the Starting and Ending RPM specs to 7000 and 15000 respectively The RPM increment you set to a relatively large 500 RPM because you are not interested right now on how HP changes with RPM or what the HP is at 1 particular RPM You are interested in Average HP Set Include Averages to Yes and the RPM range for Averaging data at 8000 to 14000 Note that the range of RPMs you select for Basic Report Specs Type Pick Individual Items Time or RPM Report RPM What to Report just Power Run 1 Filtering None Range of Data Starting RPM Ending RPM RPM Increment Use MM SS SS Time Include Averages Start Average At Stop Average At Print Figure 4 35 Report Options Menu Engine RPM Chnl 2 Chnl 3 Chnl 4 Engine Accel RPM sec Dyno wheel RPM Calcd gear ratio Clutch converter slip Observed flywheel torqu
185. pe in most any comment to describe the jetting power valve injector duty cycle pill size pump etc No entry is required Manifold Type in most any comment to describe the intake manifold and spacer plate No entry is required 37 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Headers Type in most any comment to describe the exhaust headers or manifolds No entry is required Mufflers Type in most any comment to describe the exhaust system and mufflers if any No entry is required Menu Commands The menu bar at the top provides for several command options some which are fairly self explanatory Back ok closes this menu and returns you to the Main Screen File opens up several typical Windows options You can open and save these Engine specs as separate files This allows you to easily change these specs to match a different engine with only a couple of clicks See Section 3 5 Data Libraries 38 New will blank out all the Engine Specs Engine Comments and the Engine File name will be called Untitled Open Example Engine File will open a typical Dyno DataMite Analyzer File Open menu where you can pick a set of example Engine Specs loaded by Performance Trends Open Saved Engine File will open a typical Dyno DataMite Analyzer File Open menu where you can pick a set of Engine Specs which you have saved using the Save command in this menu Save Engine File will open a
186. pecs etc 17 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 6 File Options at Main Screen LAI DataMite Data Analyzer 2 0 Performance Tren File Edit Graph Report TestConds Engine DataMite Keeping data can save you considerable time since you don t have to type in information which may be the same as the current test The New Test command is discussed in full detail in Section 2 9 New start new test Ctrl N Open from all saved tests Open from all saved tests Ctri 0 This option presents the Open Test File menu discussed in Section Open from History Log 3 5 Data Libraries From there you have several options to open a Save Ctrl S previously saved test file from any place in the Test Library or Save As Ctl A from most any place on the computer including the floppy disk drive Open from Floppy Drive 4 4 Drive Save to Floppy Drive A Drive Print Open from History Log Pro version only ieee PIA Gate This option presents the History Log a chronological list of test Unlock Program Options files you have been working with as discussed in Section 3 7 Transfer Program to Another Computer From there you can review a summary of the last 25 to 100 tests and pick one to open This method can make it easier to find a file Exit Program Ctrl you have just worked with lately say in the last couple of weeks Save Select Save if you want to save the curren
187. peration Whenever you start the Dyno DataMite Analyzer Basic or Pro versions you are brought to a Main Screen which will look like Figure 2 1 Figure 2 1 Main Screen Name of Current Test File Menu Commands of File Graph etc These Click on these give you all the options to operate the program t to switch and change test data abs to switc between the A DataMite Data Analyzer 2 0 Performance Trends YAM 900 CFG different runs of a Fie Edit Graph Report TestConds Engine DataMite Dyno Preferences particular test Run 1 Enter most any Test Comments test comments 2 047 Bore 5 19 pm 01 02 2000 Yamaha Pipe test a here to keep 12 4 98 head or test 97 cid 2 Cycle Help Operator who ran or is running the test Click here to display a list of current operators or enter a new one to change it a2 Corr Factor Operator Tom Move the mouse Test Data corr to 29 92 7 60 deg dry air over an area on the screen and a Help description of that item is given Launa Test amp Engine Conditions This summary graph shows how Corr Tq and HP for current run If more than 1 run in a test they are graphed also in 8000 iq 12000 14000 16000 gray for comparison You can click on a point on the graph line and that point will be highlighted in the test data grid Click on Slide Bars to display more Test Data which may not be able to fit on the screen A summary of critical test settings
188. ple Std 0 5 Volts F p Std 0 20 Volts ios Anafog Sensor Std Frequency Hz Multiplier Dyno Torque ft Ibs 1st Yalue enc Custom fuser supplies specs 1st Yalue freq hz _Read Magnets spec is now called Sensor Type If you selected Other RPM as the Sensor then the Multiplier spec becomes enabled This allows you to multiply this RPM by some number Often this is used by motorcycle racers who multiply clutch RPM by the gear reduction between the engine and the clutch This allows them to see when Engine RPM matches multiplied clutch RPM then they have zero Click here for list of Sensor clutch slip Types if using an Analog 44 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Data Name This is the Data Name shown in Column 4 of the Channel Settings grid of the main DataMite screen shown in Figure 2 14 You can change the name here in this screen or by clicking on the name in the Channel Settings grid and entering a new name there Analog Sensor Specs 1st Value Engineering Units 1st Value Freq hz 2nd Value Engineering Units 2nd Value Freq hz Figure 2 17 Illustration of a Custom Sensor Calibration These 4 specs are used to calibrate a Custom Sensor to read most anything you Throttle Angle want These specs can be used 2 ways 2nd Value e Type in the information provided with x 4 4 volts 82 deg the sensor This will be on a sheet with this
189. preview of each test Once a test has been chosen you can delete it by clicking on the Delete button or Open it by clicking on the Open button in this window You can also click on a different test to Preview it or close this window and return to the Main Screen without choosing a new test file If you are sure of the test you want to open you can simply double click on it from the Test List This opens the test without a preview and closes this menu Note for Pro Version You can also save sets of Engine specs to its own separate library This is done very similarly as with the Test Files except you click on File then Open from the individual Engine menus See Figure 3 29 Figure 3 29 Engine File Options Pro version only Current Engine File Name Ke DateMil w Engine Specs YAMAHA File Edit Click on File in the Engine menu to Open a set of saved New Engine specs or to save the current set of specs in just that screen Open Example Engine This allows you to build libraries of Engines for easily Open Engine creating new tests in the future Save Engine New blanks out the current specs and comments Save Engine As Open Example opens a library of example specs provided by Performance Trends Open Saved opens a library of specs you have saved Save saves the current specs to the same name as 11 these specs are currently called j Save As saves the current specs to a new name that i Block Stock you will enter Print Pr
190. pying the entire DTIMDATA folder just click on the by the DTIMDATA folder to display the folders under DIMDATA Then right click on the folder you want to Copy To find individual test files click on the yellow folder icon containing the test file and the contents of the folder will be shown on the right side of the Windows Explorer screen Then right click on the test file name and select Copy Note that each test file is made up of 3 files a CFG a DAT anda LAP file All 3 files must be copied for the Dyno Test to be copied For example if the test file in question is called Briggs04 you must copy the Briggs04 CFG Briggs04 DAT and Briggs04 LAP files You can also copy individual test files to the floppy drive inside the Dyno DataMite Analyzer program Open the file you want to copy so it is the current test file Then click on File at the top of the Main Screen then select Copy to Floppy Disk This command takes care of all 3 files mentioned in the previous paragraph automatically More experienced computer users may want to use the Backup features built into Windows 95 and 98 click on Start Programs Accessories System Tools Backup This compresses test files so it takes fewer floppy disks However you need to use the Backup program to restore test files which can be more confusing to novice computer users Restoring Data Be very careful when restoring data as you may overwrite Test Files with old erroneous information Rea
191. r Chapter 2 Definitions 2 4 Engine Specs Pro version only The Engine Specs describe the engine being tested Some specs are used for calculations but most of the other specs are for information only You can use the Filter command in the Open from all saved tests menu to find tests you have saved based on these entries For example you can find all test you ve run where the Cam description has the word Crane in it Figure 2 10 Engine Menu Click on File then e New to blank out this menu e Open Example to pick an example engine provided with the program e Save to save these engine specs to a name of your choosing e Print or Windows Printer Setup to print this screen Name of current set of Engine Specs FORD 5 0L x Engine Specs Ford 5 0L Back File Help You give the specs a name Engine Customer amp Comments when you save them Engine Customer Stock 5 0L Mustang 302 EFI Example0001 i S Engine Comments different than Test Cam amp Heads Comments lets you Type 4Stoks xi Bore f4 Headfs Stock Castron describe the engine itself Cylinders Stroke Cam Stock Hydraulic Roller Rod Length C R VivDia PotCCs A atie 301 59cid 4943 1 ccs Chmbr 83 5 ccs Int aas ie for recording information only Block Eh fas fes fie and are not used for any Piston amp Rods intake amp shout calculations You can enter most anything you want or Crank Wt amp Descr 3
192. r Graph Specs Time or RPM Graph What to Graph Just Power Run 1 Filtering Light some Notes Data Selected to Graph 4 types max Corrected flywheel torque Corrected flywheel HP 8 Make Graph Help Cancel Print 1800 2400 3000 3600 4200 4800 5400 6000 RPM Figure 4 19 Printing a Test Summary Click on File then Print for the Printout shown in Figure 4 20 A DataMite Data Analyzer 2 0 Performance Trends STKBGS01 CFG File Edit Graph Repott TestConds Engine DataMite Dyno Preferences Help New get data from ataMite Ctrl N Open from all sav d tests Ctri 0 Open from Histo Log Test Comments Briggs Jr m 95 6 cam J NGK BUSH surface gap plug Help Click on one of the Tabs here to change to a different run Windows Printer Setup Unlock Program Options Transfer Program to Another Computer Exit Program Ctrl 131 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4 20 Test Summary Printout 132 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Conclusions The installation of the DataMite hardware is critical and is covered in Appendix 2 The basic operation of the DataMite can be checked without a computer by putting the DataMite in Setup Mode DataMite and Dyno settings are critical for accurate data These specs are saved in Master files so each new test starts with the current settings for these
193. r Master DataMite Ch 1 Ex Temp 0 1600 deg Specs the specs for your current e DataMite II 27 Channel system You may ask What are Master DataMite Specs Note that the DataMite Specs for a particular test may not match the DataMite you are currently using the Master DataMite Specs The program keeps track of any changes to DataMite Specs asking 41 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions you if these changes should only apply to the DataMite Specs for a particular dyno test or if these changes represent your actual DataMite the Master DataMite specs Whenever you start a new test either based on a previous test or starting completely blank the Master DataMite Specs are used Whenever you open an old test file the DataMite specs used for that particular test are used Type Is the type of DataMite you are using either 3 Channel 4 Channel or the DataMite II 27 Channel system You choice here will affect how the Channel Settings grid is displayed and how you can specify various channel s Com Port Figure 2 14 DataMite Specs Menu Click on File then e Save as My Master DataMite Specs e Open Master DataMite Specs e Print or Windows Printer Setup to print this screen w Data Mite Specs x Back File Curent Readings Help Type Com Port l Channel Settings Channel Used Data Name Sensor and Calibration D Engine RPM Yes EngRPM 1 Cylinder 2 Str
194. r New Head SBFord 0038 Smith and you want to start with s like Smith0000 2 You can simple use the last Engine used incremented up by 1 if you Last Head SBFord 0037 select No for Enter a New Number Format 3 Select No for Enter a New Number Format then select some other Engine Pick Format lt lt Old Head Numbers not the latest Engine from the Numbers list and a new Engine will Numbers eee a 0037 be created from it This new will be either the exact you picked T typical if you are testing an engine which you have already tested or Increment UP Increment Increment Up by 1 7 by 1 incremented up by if you request it typical if you are working with a new engine but with the same Engine format This is a list of the last _ New Number Format 100 Engine s you have assigned Enter a New Number Format For Advanced Users To delete or change s in this list use WordPad or New Number nn NotePad and edit the Headnum pti file in the DTM20 folder but keep a backup in case you make a mistake Notes Set Enter a New Number Format to No to use the next Head Number in sequence Set Enter a New Number Format to Yes to use enter a Customer different number sequence or type of number Summary of Old Head Number Picked Click on the down arrow of Customer to be presented with a list of customers Head Number SBFord 0037 you have previously used You can pick one of these customers or type in a Folder Test File
195. r found may start 13 seconds into the run and may end at 23 seconds a 10 second run l Dyno Conditions factor Std Race Dyno 29 92 60 dec 7 Correct for Eng Inertia Effects Observed barometer reading in inches of mercury as read directly off a barometer instrument not corrected to sea level for elevation p51 Click on most any spec or spec name and a brief Help description is given here in the Help Frame with a page in this manual for additional info This is explained in Section 3 5 Data Libraries Click on the Test Conditions command to obtain a menu as shown in Figure 1 6 These specs are used for calculating certain outputs like corrected torque and HP etc and they are useful descriptions to remind you of what this test run was in the future Many of the input specifications you see in the various menus may not be familiar to you For a brief definition of the inputs simply click on the specification name The definition will appear in the Help frame with a page in this manual for more info Some specs have Clc buttons One example is Compression Ratio in the Pro version s Engine Specs menu Clc stands for calculate For example if you want to calculate compression ratio from chamber volume deck height etc simply click on the Cle button The program will display a new menu listing the inputs and the Calc Compression Ratio
196. r leave them blank These can be useful comments for describing how this engine was built or modified for this particular dyno test Drop down combo box For some specs like Customer in these Engine Specs you can either type something in the box or click on the arrow button to select a pre programmed selection For most others you can only select from a list of pre programmed choices Comment text frame to enter a w Engine Specs YAMAHA comment to a aS a ee 7 component specs ae omments Blueprinted Yamaha These comments T ffeterson Ef are saved with the specs in the Short Blo Cam amp Heads Component Bore 2 047 Head s mee in es come case shown here Stoke am the Engine VivDia PortCCs RRatio Lash Library E E E SS Some specs have Eo E o Eo a Clc calculate Intake amp Exhaust button where you prh Fuel Delve cotseint O Sedeo ia 3 4 bs 3 jin Carbfs this case the fedann Fuel Setin cratic on the Cle Distributor Manifold button to calculate Spark Plugs Headers it from other inputs Click on the dovin arrow button to select either 2 Stroke or 4 stroke engine types p15 Standard menu commands which provide the options for closing this menu Back saving or open files of these individuals specs click on File then Save or Open erasing a set of specs click File then New printing this screen click on File then Print etc
197. re reliable readings on this screen If you want smoother dial operation and more accurate less lag readings then specify a higher update rate Figure 2 31 Change Update Rate Change Screen Update Rate x Enter the new update rate you want a number between 1 and 10 for the number of updates you want in 1 second Cancel Higher numbers produce faster updates and smoother dial actions Lower numbers can fix reading problems C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 32 Current Readings Gauge Gauge Settings Settings Real Time Options Ea Click on Options then Gauge Settings to be presented with the screen of Figure 2 32 Here you set what channels are displayed on the gauges Dial Gauge 1 and what the range of the gauge will be Channel xj Range 0 6000 x Channel lUserSpecifiedMax Click on the down arrow button to select the channel to display on Gauge User Specified Min 1 or 2 Dial Gauge 2 Channel 4 Chnl 4 x Range Range User Specified x Click on the down arrow button to select the range for either gauge 1 or User Specified Max e 2 You can select from the pre programmed ranges provided or select zr z the top choice of User Specified Then the User Specified Max and Min User Specified Min fp specs become enabled so you can enter or change them Note Pick one of the DataMite channels to be ae displaye
198. rk output or the negative side of the coil or the yellow wire of the optional inductive pickup See Figure A2 7 page 157 for examples of ignition sources The standard DataMite module is not designed for Magneto ignitions or uneven firing engines For uneven firing engines you may need to pull an ignition signal from just 1 coil if each cylinder has its own coil or use a wheel RPM sensor or inductive pickup Wheel RPM sensors You may want to remove the nuts for stringing the cable through small openings Install these sensors and adjust them to come within 150 to 200 of the magnets initially During testing you may have to adjust them closer When the harness is strung and all cables connected plug in the DataMite module and the control panel You should see the Record LED light up on the control panel to indicate the DataMite is powered up You may see a delay of up to 20 seconds between power up and an LED lighting on the more memory 512K DataMites 152 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Figure A2 2 Typical DataMite Dyno Wiring Harness Installation 153 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 7 Check Out Signals Put the DataMite into Setup Mode by pressing the Clear Memory button while holding the Record button down See Figure A2 3 You should see the Record LED start to flash once every second or so This indicates it is in Setup Mode and is checking channe
199. rom 1 area of the graph to another Do not drag the mouse while clicking or you will Zoom in on that area 98 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Changing titles and legend names Pro version only Many times you may want to customize a graph by displaying and printing labels of your choice Click on Format and then Edit Titles Legend to bring up the menu shown in Figure 3 21 which will allow you to do this Figure 3 21 Menu to Edit Title and Legend This is the list of Standard names the program uses unless you click on the Use New Titles button below Select click on a Standard name you want to change The Standard Name appears in the edit box along with the current New name if there is one Once you have selected a name from this list that row will be highlighted it is easier to use the up and down arrow keys to select the next item to edit than clicking the item with the mouse This is the list of New names the program will use if you click on Use New Titles If a title in the List of New Names is blank the program will use the Standard name t Edit Graph Title and Legend List of Std Names ist of New Names Corr Ta Corr HP Yxhaust Comparis lt a Yamlo00 0003 fi 10 Exhaust Flex Ita l Corr Tq itm 2 Corr HP Standard name from row selected Tip New name for you to edit Other options Click on the item in the list above yg E arses eal include clicking on the Copy
200. rong Many dyno operators tend to report numbers higher than are real to make their customers happy 163 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 164 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Appendix 4 Backing Up Data Backing up data means to make more than one copy of the data which can be used or referred to at a later date This may be needed in the event one copy becomes lost or erased or you need room in the Test Library Backing up data can take 2 basic forms Paper Reports Copying files with Windows copy commands Other than making Paper Reports backing up data requires knowledge of Windows File Manager 3 1 or Windows Explorer 95 98 NT commands Unless you are experienced with Windows commands have someone experienced with Windows assist you to prevent losing data Figure A4 1 Print Test Summar iA DataMite Data Analyzer v2 0 Performance Tre Pa per Re po rts File Edit Graph Report TestConds Engine Datak New get data from DataMite Ctrl N If you already keep written copies of all dyno tests you perform you Fieri ern ad avec teats Che already understand this form of backing up data You could continue to Ea f Open from History Log do this by simply clicking of File the Print at the Main Screen to print a Save CtrlS summary of each test Gave Ae Ctrl Disadvantage of Paper Back Ups Open from Floppy Drive amp Drive Save to Floppy
201. rtia wheel types absorber types with load cells and lever arms and even chassis dynamometers User friendly Windows interface compatible with Windows 3 1 95 98 and NT Can print results using most any Windows compatible printer many times in color Save nearly unlimited number of tests for recall comparison and analysis in the future Allows several reporting and graphing options for analysis either vs RPM or vs time in seconds Added Features for Pro Version e You can also input and or record e Additional dyno details like frictional losses in the dyno system which affect the torque and HP recorded correct for engine inertia effects when running an accelerating test which is all inertia dyno tests dimensions and weights of more inertia dyno components etc e Engine specs like bore stroke head descriptions cam descriptions etc e Additional test conditions like fuel coolant head temp etc Customize printed reports and especially graphs You can include comments for each engine graphed Write ASCII files for importing data into other computer programs Filter find past tests based on certain criteria like Peak HP certain Customer name etc History Log keeps a running log of tests you have recently started new run graphed or reported Please read Sections 1 2 Before You Start and 1 3 A Word of Caution before you turn on the computer Then try running the program following the guidelines in 1 4 Getting S
202. s intended to absorb PY 176 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Figure A6 3 Graph of Coastdown Results Use the cursor ale to find th ETAST AiE xD Fulview Setsested Dyno RPM at 3 test11 all different times Dyno RPM 1263 during the coastdown These times and RPMs should be spread out as much as possible Read the RPM and time at the cursor here Note that the first time you enter in the Dyno Specs screen does NOT have to be 0 seconds but could be 6 333 seconds 80 00 120 00 160 00 200 00 240 00 Time sec 6 333 Shown here j j j I I j r j j j j j j 5 j I j j L j I j j j 1 cssces e ose eee basa gS aaeee adam nea an a 7 m TRT a 177 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies 178 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Absorber Dyno 1 55 56 148 170 Accel Time for Current Inertia 54 Accuracy 4 7 3 20 29 41 49 52 55 66 67 77 79 85 129 133 136 142 147 148 150 170 171 175 accurate 147 accurately 147 Add Test 94 136 140 143 Advanced 18 34 110 113 Air Temperature deg F 28 All Data 83 84 92 Altimeter 27 28 29 Always Autoscale New Graph 24 Analog 42 44 45 150 155 163 169 171 172 Assumptions 7 3 29 147 171 Automatically Filter Out Noise 23 Autoscale 24 Average
203. s graphed for comparison the Add Test command changes to Remove Test You must first click on Remove Test before the Add Test command reappears so you can add a different test Graphs Comparing More Than 1 Test Pro Version There are 3 basic types of tests which can be graphed in the Pro version e Current test results These are the test results of the test file which you are working with on the Main Screen e Tests marked in the History Log These are the test results which you previously graphed started new opened etc which you have marked Yes to graph in the History Log see Section 3 7 e Add Test lets you pick any test from the Test Library to add to the top of the History Log and mark as a test you want to graph Since it is at the top of the History Log it should definitely be included in the next graph In the Pro version you can compare data from up to 6 tests as long as there is room for the Legends labels for each graph on the right side of the graph Usually this ends up being about 24 graph lines which could be 6 tests with 4 graph lines for example Obs Tq Obs HP Corr Tq and Corr HP for 6 different dyno tests of 6 different cams 94 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Figure 3 16 History Log Pro version only See Section 3 7 for more details Click on the History Button or the History menu item to display the History Log Click on Single Test to graph only the Curren
204. s include DataMite power or communications serial cable not connected DataMite recorded less than 10 seconds of data DataMite not ready LEDs must stop flashing before downloading After powering up the DataMite wait at least 10 seconds 30 seconds for 512K systems before trying to download data Investigate the cause of this error and try again answer Yes below If the problem persists disconnect power or turn power off to the DataMite This will reset it without loosing any data so you can try again If this doesn t work you will have to press the Clear Memory button on the DataMite This resets the DataMite but you WILL loose your data Are you Ready to Try Again download at a computer away from the dyno be sure the DataMite s power supply is connected and On Only Some Data Recorded This would be situations where the DataMite starts a run recording data then during the run it stops recording If both LEDs start flashing on the control panel the DataMite has become confused and has locked up much as your computer can lock up This is usually caused by electrical noise from the engine a noisy unsteady power source bad wiring connections or a bad or intermittent ground Turn the Power Off then On to reboot the DataMite On earlier DataMite systems vibration of the control panel could actually false push the Record button stopping recording Try mounting the con
205. s not selected to Keep will be mostly blank when you start the New Test p 3 i Click on File then New get data from DataMite to bring up the New Test Screen Figure 4 8 New Test Screen Downloading Data Once you have recorded a test with the DataMite you must download it to your computer Click on File upper left corner of the Main Screen then New get data from DataMite to bring up the New Test screen which will likely show a Tip message See Figure 4 7 As the Tip in Figure 4 7 says it is usually easiest to start with a Dyno Test file that is as close as possible to the dyno test you just ran This prevents us from having to make major changes to test information like the Engine Specs Test Conds etc However assuming you have not tested an engine like this 5 Critical specs for the new test are listed here at the top Click here to start a New Test based on these settings w Stating a New Test i7 Start New Test Cancel don t start new test Current Readings Help Operator p Engine it Folder for New for New Pick for New _Assign Name for TEEN C Test rer Which eae to Keep based on current file a CFG See Specs Type 4 Channel DataMite See Specs Inertia Dyno 72 2 lb x ft 2 Keep this box checked if you want to copy the current test s See Specs Engine Specs to the New Test File Name Add Type of Test V Dyno IV Engine Keep
206. s search Filter option will not show up the tests run by Bob or Robert Notes Choose whether to pick an existing Operator Name set Enter a New Operator to No or to enter a new Operator Name set Enter 4 New To pick an existing operator name pick No for Enter a New Operator then Operator to Yes A New Operator name is y i 2 saved to the list of Operator Names if you click pick from the Operator list To enter a New Operator name pick Yes for on Use Operator button a the bottom if Enter a New Operator is set to Yes Enter a New Operator then type in a New Operator name which will be added to the list of operator names lize ORRA HEE cma EN Test Comments Test comments are for making most any notes about the test unusual observations customer requirements etc In the Pro version you can search the Comments for various words For example you could search for all the tests which had the word Holley or Johnson in the Test Comments 16 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Help The help frame will describe what ever portion of the screen the mouse has passed over or clicked on 2 1 3 Summary Graph The summary graph shows Corrected Torque and HP graphed versus RPM for the current run of this particular test Figure 2 6 The increment of the RPMs and the level of Filtering smoothing can be selected in the Preferences Menu
207. saved test file are discussed in Section 3 5 Print options let you print the contents of this Main Screen which is a good summary of this current test See Section 3 4 81 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 82 C Performance Trends Inc 2000 3 1 Reports Click on the Report menu command at the Main Screen to be presented with the Report Options Menu shown in Figure 3 2 The inputs in this menu are described below Dyno DataMite Analyzer Figure 3 2 Report Options Menu l Basic Report Specs Type Pick Individual Items gt Time or RPM Report RPM gt What to Report Just Power Run 1 M Chapter 3 Output Chni 2 Chni 3 Engine Accel RPM sec Dyno wheel RPM Calcd gear ratio Clutch conyerter slip Observed flywheel torque Observed flywheel HP Corrected flywheel torque Corrected flywheel HP Range of Data Starting RPM Ending RPM Type There are 2 basic types of reports 1 Pick Individual Items 2 RPM Accel Times RPM Increment Use MM SS SS Time ane Include Averages Yes l Notes Data Selected to Report 6 types max Chnl 2 Chnl 4 Caled gear ratio Corrected flywheel torque Corrected flywheel HP They can be picked by clicking on the down arrow key of this combo box If you select RPM Accel Times several options in this menu may be enabled or disabled dimmed to gray and you can not change t
208. ser s 100 Manual for definitions of Options Select this option to strip out all titles and letters leaving only numbers Convert to Columns If you do not select this option data will be written to the file much like it is displayed in the report on the screen Select this option to have the report turned on its side that is the rows will become columns and the columns will become rows File Name Enter a file name for saving this ASCII file Checks are made to ensure what you enter is a valid file name and that you are not overwriting an existing file The file is written to the Dyno DataMite Analyzer folder directory the folder which contains the DTM EXE program file There are certain limitations for file names including Names can only be 11 characters long Names can not contain certain characters like commas plus signs or spaces The program will warn you if you use an illegal character Only 1 period can be used and it can only be toward the end of the file name The program will warn you if you use a period in the wrong spot See Section 3 5 for more details on file names 89 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 90 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output 3 3 Graphs Graphs are obtained by clicking on the Graph menu command at the top of the Main Screen Figure 3 12 shows a typical graph and a descriptions of s
209. should now see the DIMDATA folder Right click on the yellow DIMDATA folder icon to display the menu of options Click on the Copy command to copy this entire folder all test files in the standard Test File Library 165 C Performance Trends Inc 2000 Dyno DataMite Analyzer Figure A4 2 Copying Files with Windows 95 98 or NT Windows Explorer Find the DTM20 folder under the PERFTRNS PTI folder usually on the C drive Click on the box to the left of a folder to show its contents folders X Exploring pfa30 File Edit View Gof Favorites Se Back Forward Up Address C perftms pti pa30 a Cut X Iools Help Copy Paste x B Properties Views All Folders 3 perftrns pti corfiprato E cta20 3 e430 E ef31 Oi dep bem EEN Cale E Combo Eaexmp JO Enaine Exploring pfa30 File Edit View Go Favorites Tools Pfadat Text E xengine head a zaak pti a r EE C E Cpe Open Find eT ean Add to Zip Ce Add to PfGat zip Er Eo Back Address All Folders Paste Undo e opy 5 19 99 3 23 PM 5 19 99 3 24 PM 5 19 99 3 24 PM 5 19 99 3 24 PM 5 19 99 3 23 PM 5 19 99 3 24 PM 5 19 99 3 24 PM 871 8 99 2 19 PM File Folder File Folder File Folder File Folder PTI File x 5 Delete Properties Views Sha g Scan with Norton Antivirus
210. st check if data signals are coming to the DataMite by running the Setup Mode discussed on page 154 Based on what you find try the following DataMite Not Going Into Setup Mode Check DataMite power Do any of the LED lights come on in the control panel Note that it may take 5 seconds or more on 128K systems 10 seconds or more on 512K systems for an LED to light after turning power On If not e First press the Clear Memory button and wait at least 20 seconds to see if an LED will light e Check that the power switch if you installed one is turned On e Check that your power supply is On or plugged in Plug something else into that outlet a light or radio to make sure there is power there Press the red Clear Memory button momentarily once The Record LED should go Off then come On Press the yellow Record button momentarily several times waiting about 5 seconds each time The Record LED should switch between Off and On If this does not happen as described call Performance Trends If the Record LED does switch Off and On try the Setup Mode again Be sure to hold the yellow Record button down for 5 10 seconds During the middle of this time quickly press and release the red Clear Memory key Try this up to 10 times to be sure the problem is consistent If the problem persists call Performance Trends DataMite Not Reading Data Signals If the DataMite does go into Setup Mode do the signals look as described on page 154 or in th
211. st results the test file at the top of the Log by clicking on Graph Current Test Only Figure 3 34 History Log at Graph Screen Click on the History Log button or Menu Command to display History Log w DataMite Analvzer v2 0 YAM 925 CFS x Back Fie F fmat View GraphType Add Test story Log Be es From the Graph TU SEB Ee lol x t Full View Set Scales Screen 2 additional Corr Tq Corr HP vs RPM yam100 0003 1 columns are Corr Tq a ae Click in the yam 950 1 Graph column to recy add a Yes or remove a Yes Tests marked Yes to graph are k i graphed if you w Test History Bil x select Graph Graph Tests Marked Yes Graph Current Test O Clear erase History Print Help Tests Marked Test File and Path Graph XA Graph Title Runs GraphRuns SaveEngine TestDate F4 Yes examples yam 925 cig YYam100 0003 01 02 2000 ae tomkraus reed09 cfg Yam 00 0003 Yes Yam100 0003 04 11 2000 1 Click in the Std tkrause yam 950 cfg YAM 950 01 02 2000 Graph Title Seer ean Er column to change rause yam 900 cfg jason jun2 cfg JUN2 04 12 2000 the Std Graph jason jun cfg JUNI 04 12 2000 1 Title Alternate jason junk cfg JUNK 04 12 2000 1 titles are also omenie dadl Seid DoDD ae __ possible by clicking on ee al Edit oe nic Titi 7 1 Click in Graph column to select or de select tests for graphing Slide button ght for more History info Tq HP corr to 29 92 60 dry Click in the Graph Runs colum
212. starts with displaying Channel 1 engine RPM Record Setup Mode starts with displaying channel 1 engine RPM Push Record button to Channel 2 and LED On R di i j Flash Setup Mode again to display Channel 3 etc I lt DataMite Performance Trends 248 473 9230 LED flashes as signal comes Gicar Maman into DataMite When engine puch Clase Mano running and on Channel 1 button to brin ee LED should flash For RPM Setup Mode oT go back sengor cpanel LED On Memory Full to Recording Mode magnet passes sensor or Flash Nearly Full O brightens or dims with analog sensors LED flashes either once twice 3 times etc quickly to show which channel is being checked DataMite Software Setup In Windows 95 or 98 start the program by clicking on Start then Programs then Perf Trends then Dyno DataMite Analyzer V2 0 Or you can click on the Dyno DataMite Icon on your desktop Each time you start the Dyno DataMite Analyzer the program will put you back to precisely where you were when you last quit the program displaying the same Current Test as when you shut down When you first get the program this will be for some test Performance Trends was working with at the factory You should obtain a Main Screen as shown in Figure 4 2 where YAM925 is the Current Test YAM925 is the current dyno test Test amp Engine Conditions i Click on Dyno to set up Dyno Specs to match your inertia dyno measurements 1 815 S
213. t Please also read the Warranty and Warning at the beginning of this manual and on the diskette envelope IMPORTANT The Dyno DataMite Analyzer program will ask for dynamometer specs and measurements and engine specs The Dyno DataMite Analyzer program is NOT checking for safe RPM limits of the dynamometer or engine design You must have your dyno design checked by a qualified engineer to determine its safe operating RPM range C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction 1 4 Getting Started Installation You must install the Dyno DataMite Analyzer from the distribution disks floppy disks to a hard drive before it will run To do this Windows 3 1 e Start your computer and go into Windows Insert the distribution disk 1 into the floppy drive for example the A drive e From File Manager select the File menu and then select Run Type in A SETUP and press lt enter gt or click on OK e Follow the instructions of the Setup program e Then to run the program once it is installed e There should be a Perf Trnds icon or program group for you to click on e Click on the Perf Trnds icon or program group which should expand and show you the contents which now include a Dyno DataMite Analyzer icon e Double click on this icon to run the program Windows 95 or 98 or NT Start your computer Insert the distribution disk 1 into the floppy drive for example the A drive Click on the Start
214. t f f ii i i Cancel into several smaller tests In this case j shown you would save this section to a new name perhaps REED 1 which would then become the Current Test You would then have to open the original REEDO9 test again so it becomes the Current Test and do the Delete Beginning or End of File command again This time draw the frame around the 2nd run and save this file to a name of perhaps REED 2 Redetermine Beg End of Runs Any time you download data for a New Test the program checks for the type of test runs you ve specified Accel to Meas Tq HP or Custom It looks for the patterns in the data it expects for say an Accel to Meas Tq HP When if finds a pattern it remembers the beginning and end of this pattern for each pattern it finds It then gives you a summary of what it found See Figure 2 44 You can also do this at any other time The only reasons for doing this is when you have changed something about the test so that now the pattern looks different than when you first Figure 2 44 Redetermine Beg End of Runs downloaded the data from the w Summary of Lap Run Analysis x DataMite These changes could include When analyzing data file REEDOS DAT You have Edited Out some As Accel to Measure Torque and HP Noise Spikes e You have Cut the Beginning The DataMite Analyzer program has found or End of Data so the data file A Number of runs 2 now looks different Minimum run time 9 83 e You have ch
215. t Epoxy the magnets in place following the directions with the epoxy Be ks F a aa sure the mounting surface is clean and grease free We recommend using Wheel RPM Sensor light sand paper or oil free steel wool to clean the surface The epoxy should be designed to work with metal and ceramic We recommend epoxies which are 2 parts which must be mixed including Ace Hardware 5 Minute Epoxy Mount on Side magnet Duro Master Mend 5 Minute Epoxy of Inertia Wheel Devcon High Strength 5 Minute Epoxy Inertia Wheel When locating the magnets be sure they are evenly spaced Apply epoxy and press into place then apply tape until set Evenly spacing the magnets insures more accurate less noisy RPM data For inertia dynos it is critical that the magnets be evenly spaced for accurate torque and HP results Many dyno testers just use magnet on the inertia wheel to avoid this spacing issue 1 magnet is always evenly spaced If your inertia wheel spins VERY slowly less than 750 RPM at the engine s HP peak you may need to use 2 or more magnets for better inertia wheel RPM data You must fabricate your own brackets to allow adjustment of the sensors from 050 to 200 from the magnets See Figure A2 1 Tips for brackets e The brackets must be sturdy either thick metal or very short e They should keep the sensor reasonable square with the face of the magnet 150 C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies
216. t Test w DataMite Analyze 2 0 REEDOS_CFG x Back File F rat View GraphType AddTest_Histof Log Single Test Help He EENE eE gieo Corr Tq Corr HP vs RPM yam100 0003 1 Test to pick a Corr Tq new test to add Corr HP the graph to yam 950 1 the History Log oat W from the entire Test Library Choose a Graph option from the menu bar to close the History Log and graph Test History the tests Graph Tests Marked Yes Graph Current Test Only Clear erase History Print Help identified by the menu option you Y am1 00 0003 pick b272000 7 01 02 2000 7 01 02 2000 7 04 12 2000 1 04 12 2000 1 rr lL cL cll Click in Graph column to select or de sel gct tests fdr graphing Slide button right for more History info g HP corr to 29 92 60 dry Click and drag slide bar to Click in this column P display entire History Log to show Yes or Click here to specify which run or Some tests marked Yes remove Yes Tests runs to graph if more than 1 run in marked Yes will be this test may be at the bottom of the hed if there i Log and not be visible now graphed if there is room typically not more than 24 graph lines total This column shows the Standard name the program will display in graph Legend for this test Click on the name to change it Alternate names are possible by clicking on Format then Edit Titles Other Graphing Features The graph screen has several other features including
217. t test and any recent changes to the same name as you are currently working with This is the file name shown in square bracket at the top of the Main Screen Save As Select Save As if you want to save the current test and any recent changes to a new name or new folder You will be presented with the menu discussed in Section 3 5 where you can change the test name change the folder you are saving it to or add a new folder name Open from Floppy Drive Save to Floppy Drive The Open command provides a simple 1 click command to open a standard Windows File Open menu displaying the contents of the disk in the Floppy Drive The Save command provides a simple 1 click command to save the current test file to the disk in the Floppy Drive to the same name as is currently being used These commands provides a convenient method for copying files from one computer to another The drive letter A or B that the program defaults to can be changed in the Preferences menu Section 2 2 Advanced Users This command copies all 3 files which make up a test file the CFG DAT and LAP file See Section 3 5 Data Libraries Print Windows Printer Setup The Print command will produce a printout of all the data on the Main Screen Many users find this to be a convenient summary of a test The Windows Printer Setup lets you change your Windows default printer paper orientation etc for printing reports or graphs in other areas of the program 18 C P
218. t them out now recommended for beginners or Not edit them now so you can try to investigate the source of the problem Edit Out Noise Spikes 74 Noise Spikes have been found in this data You can have the program Edit them out now answer Yes below or Edit them out at a later time answer No below Answering No is good for debugging the source of the Noise Spikes Then you can click click on Edit at the top of the Main Screen then Edit Out Noise Spikes to eliminate noise spikes at a later time Do you want to Edit out Noise Spikes now This message lets you know how many dyno runs the program found in the data you just downloaded STKBGSO1 _DAT When analyzing data file As Accel to Measure Torque and HP The DataMite Analyzer program has found Number of runs Minimum run time Maximum run time i Median run time 10 67 If this does not appear correct Check the DataMite Setup Specs for corect Data Type and Auxiliary RPM sensor descriptions Use the Edit command to Cut Beginning or End of Data Then erase parts of the data file which may include engine warm up excessive coast down etc Type at the top of the Graph Screen and select to graph Corrected Torque and HP vs RPM for this test Set up the graph specs as shown in Figure 4 17 Click on Make Graph and you will obtain a graph shown in Figure 4 18 129 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Figure 4
219. taMite Analyzer Appendicies 4 Obtain an Upscale Reading Figure out EXACTLY the torque produced when you add the Calibration Weight and its hanger to the Calibration Torque Arm Calibration Torque Calibration Weight x Calibration Torque Arm Length In the example above this would be Calibration Torque 77 4lbs x 1 25 feet 96 75 ft lbs Type in 96 75 for the 2nd Value ft Ibs torque in the calibration screen Hang the 77 4 lb weight in the Calibration Arm hole that is 15 15 12 1 25 feet out from the center of the dyno Note that the measurements of 77 4 lbs and 15 are just examples Your numbers for your system would likely be very different Then click on the Read button for 2nd Value Freq hz and the program will read the signal from the sensor with 96 75 ft Ibs of torque It will store this reading as the 2nd Value Freq hz where you can see it 5 Save the Calibration In Figure A5 6 C you will note the calibration shown at the top of Dyno Tq 102 866 0 96 75 Chnl 4 This is the information the program will use to figure out how much torque is produced from a certain sensor signal Click on the Keep Specs to keep this calibration and load it into the DataMite Specs Sensor and Calibration column for this channel After calibrating the Dyno Tq channel in the DataMite Specs menu you must also assign the correct Torque Measurement type in the Dyno Specs menu See Figure A5 7 Figure A5 7 Assigning
220. talled the DataMite as outlined in Appendix 2 The sensors include e Channel is engine RPM from an external Inductive Pickup as shown in Appendix 2 for a single cylinder engine like a Briggs e Channel 2 is recording dyno wheel RPM 1 magnet epoxied to the outside edge of the inertia wheel e Channel 3 is also recording dyno wheel RPM 1 magnet epoxied to the outside edge of the inertia wheel This sensor came with the standard harness Since nothing else was being recorded you set it up to read the same magnet as Channel 2 Then should Channel 2 s data look bad you can reconfigure the software to use Channel 3 s dyno wheel RPM e Channel 4 is not being used After the DataMite is installed it is a good idea to check that all sensors are working Put the DataMite into Setup Mode by powering up the DataMite The Record LED light emitting diode may flash or stay off for several seconds but will eventually light steady If the DataMite s memory was full then the Clear Memory will eventually light steady and the Record LED will go off Then hold down the yellow Record button on the DataMite control panel while you momentarily press for about half a second the red Clear Memory key Then release the Record button also You see the Record LED flash once then remain off for about a second This flash pattern repeats The one flash shows the DataMite is checking out channel 1 or Engine RPM When you start the engine you see the Clear Me
221. tarted and 1 5 Example to Get You Going When you feel a little familiar with the program take time to read this entire manual It will show you all the things you can do with this powerful tool C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction 1 2 Before You Start What you will need e IBM 486 or Pentium or 100 compatible Math coprocessor or Pentium recommended e 8 Meg of RAM e Approximately 10 Megabyte of disk space More is required for storing large s of tests e Windows v3 1 or Windows 95 or 98 or NT Many terms used by the Dyno DataMite Analyzer and this user s manual are similar to terms used by other publications i e Inertia Correction Factor etc However these terms may have different definitions Therefore read Chapter 2 to see what these terms mean to the Dyno DataMite Analyzer Occasionally it will be necessary to identify typos in the manual known bugs and their fixes etc which were not known at the time of publication These will be identified in a file called README DOC in the Dyno DataMite Analyzer directory or folder This file can be displayed right in the DataMite Analyzer by clicking on Help at the Main Screen then clicking on Display Readme doc File You can also read it using utilities like NotePad or WordPad Unlocking Program Options The Dyno DataMite Analyzer is equipped with copy protection This ensures the legitimate users do not have to cover the costs
222. ter Options menu standard Windows File Open fit certain criteria See Section 3 6 in most any folder directory isk drive Click here to bring up on screen help andlor Eve Click here to close the Test Library with No changes without opening a test Click here to open the chosen Test Select one of these options to list the test files alphabetically either by test file name or by engine This option can save you time looking for a particular test file Pro Version Only 107 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 3 Output Open a Test File To open a test file saved in the Test Library click on File at the upper left corner of the Main Screen then on the Open from all saved tests In the Pro version you have an additional option of Open from History Log which will be discussed in Section 3 7 You will obtain the window shown on the previous page Single click on one of the tests in the list or click and drag the slide button on the right side of the list to display more tests Once you single click on a test it is now the Chosen Test File and a preview of the test is given in the Preview section If the file you chose was not a valid Dyno DataMite Analyzer file either Windows V2 0 or the older v1 x for DOS the program will tell you and you can not choose it Tip Once you click on a test and get a preview use the up and down arrow keys to go through the list test by test getting a
223. this box checked if you want to copy the current text s MV Test Conds cee Test Conditions to the New Test pecs Keep this box checked to use comments below for New Test Yamaha Pipe test 1227798 Lo 1 178 Hi 378 G2 9 50 flex ENERTIA DYNO ly Test Comments Once a New Tdst is started you can easily erase or modify any of the specs listed above Art specs not sblected to Keep will be mostly blank when you start the New Test You can edit the current comments here for the new test or un check Test Comments to start with hlank comments A summary of the current settings is given here Click on these buttons to see the current settings If this is the first time you have started a New Test and you haven t set up any Master Dyno or DataMite specs the preview will say no Master Specs You will have to fill out these specs before you can start the New Test Click here to Check or Uncheck these options Checking means you want to keep these specs for the new test Once the new test is started you can then make modifications to these specs if vou want 125 C Performance Trends Inc 2000 Dyno DataMite Analyzer one before you can start this test with whatever the Current Test is Chapter 4 Examples The New Test screen appears as in Figure 4 8 There are 5 critical specs at the top which must be filled out or picked If this is the first New Test you have run you just got the program and yo
224. time Data graphed vs RPM has been more mathematically manipulated and is not as close to the original data as when graphed vs time Click on Graph at the top of the Main Screen then select Engine RPM and Dyno RPM as the only data types to graph Set Filtering to None so that you see the data in its most detailed and un smooth state The graph specs should look like those in Figure 4 15 Click on the Make Graph button to produce the graph shown in Figure 4 16 The graph shows no noise pikes and in general data very smooth There is a little jump in Engine RPM when the throttle is closed at the end of the acceleration but experience tells us this is probably real Since it occurs at the very end of the acceleration not in the middle it will have little affect on the calculated torque and HP Since the data quality generally looks very good you can have good confidence in the calculated torque and HP Click on Graph Figure 4 13 Messages After Download DataMite Data Message stating that data looks clean or free of what appears to be bad data points Message to acknowledge data was read from the DataMite DataMite Analyzer DataMite Analyzer Downloaded engine Chnl 2 Chnil 3 Chnil 4 data No noise spikes found If Noise Spikes had been found you would have gotten a message like this stating that the program has found what it believes is bad data points You can elect to have the program edi
225. tions Selected in Figure 1 4 w DataMite Analyzer 2 0 YAM 900 CFG Back File Format View GraphType AddTest History Log Multiple Tests Help Ne ess eo Le Tet Pele tf en a seas Click on A Test File is actually made up of 3 files i i i i Click on 1 The DAT file data file a a R A ee eda Back to which is the data recorded by return to the DataMite the Main 2 The CFG file configuration Screen file which is the DataMite and dyno settings engine specs test comments etc This is the file the program actually looks for when you open a test or save a test etc For that reason you will see a CFG after the test name like in the square brackets at the top of the main screen shown in Figure 1 3 0 4 4 4 4 L L 4 L L 3 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 RPM C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 1 Introduction 3 The LAP file lap or run file which the Figure 1 6 Test Conditions Menu Pro version w Test Options Back Help DataMite Analyzer uses to determine where each run starts and stops Even though you may have recorded 45 seconds of time for a dyno run the actual run which the Type of Test Type Meas Tq HP from Accel gt Track Weather Method of Reading Weather Data Obs Barometer Hg Air Temperature deg F Dew Point deg F DataMite Elevation feet Analyze
226. to read and understand the DataMite Specs as discussed in detail in Section 2 5 page 41 Dyno The Dyno command opens up the Dyno Specs menu where you can describe the Dyno you are using These specs are critical for calculating torque and HP from the raw data you are actually recording The specs in the Dyno menu are critical for accurate results Be sure to read and understand the Dyno Specs as discussed in detail in Section 2 6 page 49 Preferences Preferences let you customize the program for your needs and for your computer and printer See Section 2 2 page 23 Help Click on Help for several options to help describe your options at the Main Screen and for other information to help you understand how this program works 20 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 21 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 22 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 2 Preferences Figure 2 8 Preferences Menu Click on the Preferences Preferences item in the menu bar at the top of the Main Screen to bring up the Preferences First Performance Trends Inc Default Floppy Disk Drive ee pacond Std Graph Title Created in History Log Here you can adjust some y it Tip Enter text company name phone etc which Prostam MEMSO will appear at top of printouts personalize the program l Program Tit
227. torque horizontal X axis of the graph Corrected flywheel HP What to Report Select what part of the dyno test you want to make the report of All Data Just Power Run 2 if it exists Just Power Run 1 Just Power Run 3 if it exists etc Make Graph Help Cancel Print Click on the down arrow button to choose either to report All the Data all data recorded or just a particular run If you have selected an RPM graph you can only choose a particular run Note In the Pro version you can also select which run to graph by entering the Run number in the History Log See Section 3 7 Filtering Smoothing Click on the down arrow button to select the level of filtering smoothing to be done to the data before the report is made None Medium Light some Heavy lots Select the lowest level that eliminates most not all of the jitter in the data Be careful not to over filter as this can completely distort the data The dip seen in the Graphs of Figure 3 14 is real and is due to exhaust tuning effects on this 2 stroke engine Note that the graph with Heavy Filtering has lower Peak values than the graph with Filtering set to None Also note that the dip at 11000 RPM is not as deep with Heavy Filtering This shows how Heavy Filtering can distort the data 92 C Performance Trends Inc 2000 Figure 3 14 Examples of Various Levels of Filtering t DataMite Analyzer v2 0 YAM 1000 CFG
228. tory Log examples yam 950 cig Yam100 0003 Yam1 00 0003 01 02 2000 and puts a Yes examples yam 975 chg yamaha 9 75 Yam100 0003 01 02 2000 in the Graph examples yam 975 clg fam 00 0003 Yam100 0003 oi 0272000 Exi column Click in Graph column to select or de select tests for graphing Slide button right for more History info Tq HP corr to 29 92 60 dry When comparing Corrected torque and HP for different tests it is important that the weather conditions you ve entered for each test in the Test Conds menu are accurate These 5 test were all run on the same day so the weather conditions should all be quite similar A quick way to check this is to click on View then Correction Factors as shown in Figure 4 32 Ifthe Correction Factors are all quite similar then the weather conditions must also be similar The 9 00 flex s Correction Factor is the only one that looks somewhat different Perhaps you should double check the Test Conds for that test If the Correction Factor is in error it will move the Corrected Torque and or HP curve up or down It will not change the shape of the curve or change the RPMs at which the peaks occur Figure 4 32 can look quite confusing Figure 4 33 is the same data with these changes e Inthe Graph Type menu of Figure 4 30 click on Corrected Flywheel Torque to de select it The graph will now be for only Corrected Flywheel HP e Also in the Graph Type menu select Heav
229. troke PkTq 8 26 9750 and settings ig 97 cid 2 Cycle PPRHP 15 66 10000 f Test Data corr to 29 92 7 60 deg dry air CI ick on DataMite to set up the DataMite Specs to match your sensors for particular channels These current results are from the last dyno run you were working with This is identified by the name in square brackets at the top of the screen in this case YAM 925 j s000 10000 12000 14000 16000 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples Click on DataMite at the top of the Main Screen to open the DataMite Specs menu shown in Figure 4 3 There will already be specs in this menu which are the DataMite settings used when test YAM 925 was run You will change these specs to match your DataMite Put a Yes in each row you are using the first 3 If there is not already a yes there then click in the Used column in the row you need to switch a blank to a Yes Figure 4 3 DataMite Specs Menu When finished changing these specs click of File then Save as Master DataMite Specs to save these Data Mite Specs Te Current Readings Help Click here to switch Open Master DataMite Specs between Yes and blank Save As Master DataMite Specs Be sure there is a Yes for f Cha all channels you are using Fiii c Sensorand Calibration 1 Engine RPM EngRPM 1 Cylinder 2 Stroke Ea Frequency Chnl 2 Dyno Wheel RPM 1 Magnet a Frequency Chnl 3 Other
230. trol panel away from vibration Also current DataMites have a built in delay time in the buttons which means you must press and hold the button down for a half second or so This is also to prevent false button pushes from vibration RPM Data Recorded but Looks Bad 160 RPM Data Noisy or Jumpy See Figures 2 46 and 2 47 on pages 78 and 79 for examples of noisy data versus noise spikes See Section 2 10 for the process to Edit Out Noise Spikes If an occasional noise spike appears in your data this is normal 1 30 per test Simply use the program s Edit feature to get rid of them C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies SSS SSS SS SSS SSS SSS SSS maaa aaa Sas Filtering is designed to help noisy data See pages 92 and 93 However if the problem is severe or if it is possible to eliminate either the noise or noise spikes the following suggestions may help For engine RPM this can be caused by e Electrical noise from ignition system See Noise Sources described below e Point ignition systems can cause problems at high speed where the points can bounce which looks like additional spark firings The engine will not run poorly since the first bounce fires the plug correctly This problem is identified when e RPM looks correct at relatively low RPM 1000 3000 RPM e At higher RPM the computer reads RPM too high say the tachometer says 5000 but the computer reads 6000 This problem can be
231. ttle the same etc Do not let your emotions get involved with your testing You may want to prove your theory that Attaching magnets to the carb float bowl will energize the fuel and make more power If you run enough tests you will find a before and after test to prove your point even if the average of all tests say there is no effect Always try to repeat your Baseline or the Before condition For example run 2 or 3 tests with the Baseline Cam A Install Cam B and run 2 3 tests Then reinstall Cam A and run 2 3 test to prove that your Baseline repeats Back to back repeats do NOT prove repeatability of the whole test like repeating the Baseline again after the modification Something could happen during the teardown for the cam installation C Performance Trends Inc 2000 Dyno DataMite Analyzer Appendicies Appendix 2 Hardware Installation and Operation 1 Ensure All Pieces Were Shipped The DataMite data logger system should be shipped with 1 Re hee DataMite module Important The standard DataMite module is NOT designed for Magneto ignition systems or uneven firing engines for example Harley Davidson V twins Call Performance Trends for exchange with proper module possibly at extra charge before hooking up DataMite Control panel with 2 push buttons Wiring harness with standard wheel RPM sensors Magnets for wheel RPM sensors Serial cable for connecting DataMite to your computer s COM port Common Data
232. tton in the Open Test File menu Figure 3 28 page 107 to be presented with the screen shown in Figure 3 32 below Figure 3 32 Filter Files Menu w Filter Files Click on the down arrow button to pick the spec or comment to check for a certain condition Has this relationship Click on the down arrow button to pick the condition to look for These change depending on the spec or comment you have chosen i Type in or pick x from a list for some specs List Files If This comment or spec as this relationship To what fftered here the condition to look for The program treats UPPER and C List Files If And Or This comment or spec Customer Has this relationship 4 Contains A lower case letters the same bowtie BOWTIE BowTie Include this condition also To what eftered here z Customer Engine Type Has this relationship Check here to include a 2nd condition This enables specs in I Include this condi To what entered here Show only files fitting these limits Turn Off Filtering show all files ____ Click on this button to return to the File Open menu which will now show all test files Print list of all files fitting these limits this section elp Note Filtered lists will not include v1 x files Click on Help for more info Click here to produce a report of all files meeting the Filter conditions IN ALL FOLDERS in the
233. u had not already entered the Master Dyno and DataMite specs there would be no summary of the Master DataMite or Master Dyno specs You would have to fill out the Master Dyno and DataMite Specs before the program would let you start a New Test Filling Out Other Specs other than DataMite or Dyno Specs to Start a New Test If you want to modify some specs from the previous test click on the See Specs buttons for each category of specs Click on Help at these menus for more info on how to enter these specs Since you have not run a Stock Briggs engine before the engine specs currently loaded for a Yamaha are probably quite different than the Briggs you will run You can either choose to enter these or change these specs now before you download data or change them after you download data for Engine Specs Figure 4 9 and Test Conds Figure 4 10 to enter these specs Of these specs the Weather Conditions in the Test Conditions menu are the most critical These will affect the Corrected Torque and HP numbers Figure 4 9 Filling Engine Specs Menu Open Engine Stock Briggs Save Engine Save Engine As Print Print Blank Worksheet Windows Print Setup Crank Wt amp Descr 4 Jibs Flywheel Wt amp Dia 6 _ ibs p jh Distributor m Cam amp Heads Heads OOOO O Cam VivDia PortCCs R Ratio Lash es amp Exhaust Fuel Delivery Carb s Carburetor s Headers
234. uld do before you do your test An engine simulation program like Performance Trends Engine Analyzer is good for this If your results don t match what you expect start looking for errors in the installation of the part or in the engine rebuild Many times dumb mistakes are the reasons dyno results are not correct Examples could include RTV squeezing out into a port or plugging a carb port Changing the coolant temp sensor location so you warm up to a different temp Changing the type of oil or the amount of time on the oil Changing fuel Mis timing the cam or the distributor Entering the weather conditions wrong etc Corrected Torque and HP readings should repeat better from day to day than Observed Torque and HP readings Therefore you will want to compare Corrected Torque and HP when checking for changes The corrections Performance Trends use are very similar to any other dyno software package However no weather corrections work perfectly Therefore when you need to check for small improvements you should try to run the tests as close together in time as is possible ideally within a few hours This helps ensure the weather does not change and other unknows like fuel oil testing procedure due to different operators etc Always perform each test as exactly the same as possible Warm up at a certain RPM to a certain coolant oil and or head temperature open the throttle at the same rate wait for a certain RPM close the thro
235. uld read approximately 85 850 100 x 1 less or 30 46 85 29 61 It is useful to keep records of information like this what your actual barometer reads versus what this simple calculation says it should approximately read to see if the comparison is constantly jumping around If you always make the check at the same place same elevation like your home or shop and the difference is varying high by 1 than low by 2 etc you may want to have the barometer or altimeter checked out e Ifyou find that you are making many adjustments to your weather station you are probably doing something wrong A barometer or altimeter which reads low but consistently reads low is better for correcting torque and HP to see trends than one you are trying to keep accurate by constantly adjusting it Performance Trends is developing an electronic weather station to help eliminate any confusion and improve accuracy Dyno Conditions Water Temperature deg F Enter the average temperature of the coolant during the test For air cooled engines enter the cylinder head temperature or cooling air temperature This entry is for information only No entry is required 29 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Oil Temperature deg F Enter the average temperature of the oil during the test This entry is for information only No entry is required Fuel sp g Enter the specific gravity of the fuel being used
236. use Chapter 3 Output All these topics will be covered in this chapter Figure 3 1 shows how to reach all these various features Figure 3 1 Various Output Options from the Main Screen Click on File to display several options to Save test files Open test files which were previously saved display the History Log or print information Click on Graph to display several Graph Options and produce a high resolution graph Click on Report to display several Report Options and produce a tabular report Once a report is displayed it can be output as an ASCII file or printed Open from Pro version s History Log displays a chronological log of test files you have recently worked with started new opened made graphs or reports of etc Section 3 8 Name of current Test File IAI DataMite Data Analyzer 2 0 Performance Trends YAM 950 CFS File Edit Graph Report TestConds Engine DataMite Dype Ctrl N Run 1 Preferences Help New get data from DataMite Open ffrom all saved tests trl 0 Open fiom History Log Test Comments Sake Yamaha Pipe test A gg Savads Open fin Floppy Drive 4 4 Da Save Nippy Drive 474 Drive Saving options to Save a test file are discussed in Section 3 5 Print Opening options to Windows Printer Setup Unlock Program Options Transfer Program to Another uter Exit Program 7000 9000 11000 13000 15000 open a previously
237. ushed thickness is after the head bolts have been torqued to spec Gasket Bore Diameter in Is the diameter of the bore in the head gasket A good approximation is to use the same as the Bore in the Engine menu and this value is loaded in when you first open up this menu You can change it to most any value you want In actual use gasket bores are usually 030 100 larger than the cylinder bore Deck Height Clearance in Deck Height Clearance is the distance in inches from the top of the piston to the top of the cylinder block when the piston is at TDC The top of the cylinder is the deck or surface to which the engine bolts If the outer edge of the piston travels above the deck this is called negative deck height and you must enter a negative number 64 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions Figure 2 36 Calc Gear Ratio 2 8 2 Calc Gear Ratio Calc Gear Ratio This menu is available by clicking on the Gear Ratio Clc button in the Dyno specs menu Inputs Type Type Chain Drive Only Click on this combo box to select from Teeth Engine Gear e Gearbox Only Teeth Dyno Gear e Chain Drive Only IOOC EDIP NENT SEE EN J O i th S k e Primary Ratio amp Chain Drive Teeth Engine Sprocket e Primary Gears amp Chain Drive Teeth Dyno Sprocket For motorcycles with a Primary gear drive between the engine and Note transmission Select Primary R
238. using Weather Inputs Relative Humidity Know Dew Point fheside A Temp dea E See Section 2 3 Test Conds menu to see why Dew Dew Point deg F Dry Bulb Temp deg F Wet Bulb Temp deg F lise Cale Value If you know the dew point of the air and the air temperature select Yes Otherwise select No to input Wet and Dry bulb temperatures from a psychrometer Depending on your choice the appropriate inputs are enabled Point is usually more accurate and less confusing than Relative Humidity for entering humidity information Know Dew Point Outside Air Temp deg F Is the outside air temperature when and where the Dew Point measurement was made This is not the temperature of the air which enters the engine Dew Point deg F Is the air s Dew Point in degrees F as reported by a weather service or measured by humidity instruments Dry Bulb Temp deg F Is the temperature of the dry bulb thermometer on the psychrometer in degrees F This is also the temperature of any thermometer mounted in the shade when the Wet Bulb Temp reading is taken The Dry Bulb Temp must not be less than the Wet Bulb Temp Wet Bulb Temp deg F Is the temperature of the wet bulb thermometer on the psychrometer in degrees F The wet bulb has a wick or cloth covering the bulb which is moistened with water The dryer the air the greater the difference between the wet and dry bulb readings Relative humidity or dew point can
239. ut to the true 150 HP This dyno with the 10 HP spread in data is not nearly as repeatable as the first but is more accurate Ideally you want both a repeatable and accurate dyno but this is not always possible When are accurate measurements and repeatable measurements most desirable e Ifyou very accurately want to determine if a modification for example changing the intake manifold has improved the performance the repeatable dyno is the one to use e Ifyou want dyno numbers to use in a magazine article for other people to compare their dynos with you are better off with the accurate dyno e Ifyou want HP numbers to use for certifying an engine for example selling an engine with a guarantee it produces 150 HP you are better off with the accurate dyno For most dyno testing repeatability is more important Fortunately repeatability is also easier to obtain Accuracy There are many types of calculations being performed by the Dyno DataMite Analyzer The accuracy of the torque and HP measurements are probably most important to the user and depends on the following e Foran Inertia Dyno it is critical that the dyno s inertia be accurate This could be done by actually measuring the system s inertia but this would be expensive and time consuming Therefore the program estimates the total inertia based on measurements and approximate densities of various materials or the known weight of the components An error here
240. ver RPM channel you have specified as Dyno RPM on the DataMite Gear Ratio entered in the Dyno Specs menu unless there is clutch slip Clutch converter Clutch slip in It is critical you have the Gear Ratio in the Dyno Specs slip correct for Clutch Slip to be accurate Observed Obs Tq Is the observed uncorrected torque measured at the dynamometer In the Pro flywheel torque version you can include Coastdown Data to estimate losses in any gears or chains between the engine and the dynamometer in the Dyno Specs menu You can also request the program to try to correct for engine inertia effects Test Conds menu and enter Short Block Specs in the Engine Specs Menu Then the Observed Flywheel Torque is very close to be what the engine produces at its crankshaft under steady state non accelerating conditions Is the observed uncorrected horsepower calculated from Observed flywheel flywheel HP torque above See Observed flywheel torque above Corrected Is the Observed flywheel torque described above corrected for weather flywheel torque conditions Corrected torque should be more repeatable from day to day even if weather conditions change if you enter accurate weather conditions in the Test Conditions menu for each test In the Pro version you can select what standard conditions to correct the data to Corrected Corr HP Is the corrected horsepower calculated from Corrected flywheel torque above flywheel HP See Corrected flywheel torque above
241. y Filtering e Use the mouse as shown in Figures 4 25 and 4 26 to zoom in on the HP peaks This graph of Figure 4 33 now shows e The longer the exhaust flex the lower the RPM where the HP peak occurs This is exactly what engine theory would predict longer runner lengths move the torque and HP peaks to lower RPMs e All curves show a dip right at the HP peak probably due to the exhaust tuning effects of this engine Exhaust tuning seems most probable because these relatively small exhaust length changes are significantly changing the shape of the curves e In general the 9 50 pipe test seems to have the higher HP over the largest RPM range This seems to be the best exhaust pipe length for HP 142 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 4 Examples When it comes to optimizing an engine for some particular type of racing HP is the key Optimize your engine for maximum HP over the RPM range you will be using Then select gearing and shift points to keep the engine in the highest HP RPM range Notes on Multiple Tests Pro Version When you click on Add Test in the Pro version and then pick a test to add you are actually adding that test to the History Log as shown in Figure 4 34 The program puts a Yes in the Graph column All tests marked Yes in the History Log will be graphed as long as there is enough room in the graph legend If the tests you wanted to graph were already in the History Log you c
242. you could hook up an Engine Pump Pressure Control Valve engine to a hydraulic pump as shown in Figure 2 25 Gauge Regulates Load By controlling the Control Valve Opening you can Reads On High Pres load up or unload the engine You can read the load Load PaM pane on the engine with the pressure gauge To convert pressure into torque you need a performance curve for the pump you are using The major disadvantage of this type of dyno is that if the pump changes more internal leakage changes in Oil Return Line to Pump Pi efficiency etc the measured torque and HP results will change If 1000 PSI was 10 ft Ibs when the pump Oil Reservoir for Storing was new 1000 PSI may be 11 ft lbs when the pump and Cooling Oil gets older This type of torque measurement is not yet covered in the software The next few pages are left blank for when we further develop the software for this type of dyno 56 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 57 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 58 C Performance Trends Inc 2000 Dyno DataMite Analyzer Chapter 2 Definitions 2 Current Readings Figure 2 30 Current Readings Screen This screen displays the current readings of selected channels from the DataMite Some channels are displayed on the two gauges All channels are shown in the boxes below the gauges w Curent Readings Close back Opti

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