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An intermediate guide to operation of the latest - Honda

1. Open ROM best sulted for the engine a File name P72 Export ct al ven Folder oneal Save as type CROME Calibrations Tne 3 It is best to use the P30 or Gold CromeAu ROM base for most ECUs simply because they are more stable and have more plugin support with CROME The base code of the ROM does not have to match the ECU or engine you are using and it often won t The data you change in the ROM is what dictates how the ECU runs Only use a native base if the ECU rejects known working P30 or Gold files See troubleshooting for more info 4 Open a second instance of CROME at the same time Click File New CTRL N or use the toolbar icon if and select either P30 JDM Civic B16A 203 or CROME GOLD BASE v0 94 if the Gold file doesn t open verify your registration was completed successfully and restart 5 Click File Import Tables and open the exported calibration from your other instance of CROME Pr2Exportct2 tti S AGO LZBPM CTR Fie Feni Choose your base ROM Re P72 61801 File Import Tables and find your engine export file 4 wt t File name P72 Export ct i Open Files of type All Supported Files Cancel w Folder 6 Click Tools Advanced Tables CTRL L in both open files and cross reference all available values to match as evenly as possible if the data exists Some base ROMs don t support much advanced table information in which case
2. The dyno should keep the engine from revving past the set speed If not make sure the clutch isn t slipping and check for dyno error Tables ANC Graphs E Options ah He IgnitionFuel T ables ae Injector Duty Cycle Me A X Col 4 2 3 4 5 6 B7 BS B9 B10 B11 B12 E mbar 114 201 200 403 576 750 565 923 g81 1038 1161 1284 vac bst 271 36 16 62 16 26 1287 TIF 269 0 4 1 2 2 0 2 9 47 6 4 500 602 703 ror 1000 5 24 215 Misai 193 0 92 3 32 9 24 9 60 9 61 9 61 9 61 4250 Start with the first row you can achieve after idle 1500 O ia O For those using an external wideband meter not being datalogged through the ECU enable Smart Tracking and hold the throttle or MAP position of a cell and use PgUp or PgDn to adjust the fuel value while viewing the active fuel table until the meter matches your target Some find quad cell or other multi cell averaging on the first fuel tuning session to be faster and reduce graph line overlap but when the entire map is finished you should go back and fine tune each cell Smart Tracking does not have to be enabled for multi cell logging the tracking styles are just consolidated under Smart Tracking since they are related For badly estimated basemaps smooth the fuel map after auto tuning or go to Settings Tuner Apply Map Smoothing After Tuning but be sure to disable this after the first runs are completed and go through again to fine tune each cell When the ECU inte
3. CROME v1 6 2 PRO DEALER USER MANUAL An intermediate guide to operation of the latest CROME engine tuning and ROM editing software 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G viT be IMPORT te f T 4 F CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 1 REQUIREMENTS Please visit www TuneWithCROME com to download the latest CROME software and read this manual thoroughly for proper operation 1 GHz processor 512 MB RAM 5 MB hard disk memory f f f 4 Windows XP Service Pack 2 or newer Microsoft based operating system Honda OBD1 EPROM modified ECU with the J12 internal jumper removed One of the following EPROM burning or emulating devices Moates Burn1 or Burn2 Xtronics Pocket Programmer Willem PCB3 or newer Moates Ostrich or Ostrich 2 0 emulator Xtronics ROMulator One of the following datalog header connections Moates Hondalog or Xtreme Hulog adapter or Nokia DKU 5 USB adapter Any available wideband O2 sensor controller A purchased CROME license and registration string is necessary for the purposes of this manual as the advanced tuning section focuses primarily on the Gold ROM platform INDUSTRY PREFERRED APPLICATIONS Although not required CROME Gold files cannot be accessed without a Pro license and cannot be saved or burned to an EPROM chip without a Dealer license Keeping this in mind the following o
4. s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL 7 Open CROME and navigate the menu bar to File Settings or click on the Settings icon in the toolbar Select the Tuner Comm tab and set Serial Protocol to Crome QD3 or QD2 unless you re using an older ROM firmware version Make sure the Port number and Baud Bits per second matches the Device Manager profile as shown below Detect Connection Seral Com Settings Connection Settings Port EOM a Timeout 250 milliseconds Baud 38400 blas Tries 2 Data Bits Parity Stop Bits Defaults 8 Move to the Real Time Programming tab if equipped with a Moates Xtronics or PGMFI product Willem and other EPROM burners use external software to program ROM files Connect the EPROM burner first and observe which port is designated for it in the Device Manager If you are only equipped with an emulator or Moates Demon RTP treat it as your chip burner for this step General Options Real Time Frogramming Tuner Comm Tuner Logging Tuner Data Graphs Hardware Type Moates Ostich BUANT lw Used for 27SF512 Detect Connection Seral Com Settings Connection Settings Fort EOM z Timeout 250 milliseconds Baud 320000 blas Tries 2 continued 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 P
5. Exclusions invert Output W Disable on CEL iw Disable on Standstill Map Adjustmetns RPH lon Fuel us Event Conditions Minimum Maximum Engine Speed 11029 rpm Engine Load 694 304 mbar Vehicle Speed B 159 mph Throttle Position 10 110 w Low Load Engagement must always be equal or higher than the High Load Engagement or the ROM will not work properly However low load will never demand a lower engagement anyway 13 Boost Limits will usually default to whatever the MAP sensor maximum is however it can be adjusted for creep and spike protection In Gold files the Temp Threshold is the minimum ECT required to switch the boost limit from cold to warm It can also be used for heat protection either through a System Event to A13 MIL or setting a high threshold and low warm limit 14 Boost Controller is only functional with an Electronic Boost Controller and you should read the EBC manual thoroughly before beginning to program this section A16 A17 or A20 should be used for boost control A17 IAB is a good option if it s available 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David 5 ETN G TY a IMPORTS a 15 16 17 CROME v1 6 2 PRO DEALER USER MANUAL Output to A1 IAB Secondary Runner Invert Output Solenoid Performnce Duty 20 30 409 455 509 55 60 T0 30 psi Cs ss ma ss os no me us i
6. raise the Maximum Load and Throttle to the highest value and change the Targeting Mode to Variable it will reference the Target Lambda table F10 for corrections Leave the Voltage Offset as is unless there is an obvious need to change it Fuel Correction Limits can be set all the way up to 100 but if the ECU needs more than 25 correction it s probably due for a tune or a fuel system check Most Custom ROMs should have the Barometer disabled and taped over in the ECU to eliminate the variable which can skew tables Absolute pressure is more consistent for tuning The Electrical Load Detector should also be disabled especially in JOM vehicles as they don t have an ELD input 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David w G ny ik IMPORTS Ca if As 7 m amp CROME v1 6 2 PRO DEALER USER MANUAL Now For the Tricky Stuff 18 Adjusting fuel tables for modifications Unfortunately CROME does not have an option to adjust cells by percentage however if you re rusty with head math you can import tables into an Excel worksheet and multiply them by any number in the formula bar to a new table These are estimates strictly for building basemaps they should not be driven on blindly a Intake Mods changes when the engine will aspirate the most which will change when it needs fuel O O O Filter and Pipe increase all high MA
7. 09 2 05 2 05 Voltage is usually around 14v while running with alternator and ranges between 11v and 13v while starting Voltage can drop while starting so be sure to pay attention to lower columns if having trouble with warm starting Honda Prelude 92 96 VTEC 330cc 311b 2ohm Honda Prelude 7 02 290cc 28lb 120hm Mitsubishi DSM 90 94 Turbo 450cc 431b 30hm Mitsubishi DSM 95 99 Turbo 450cc 431b 3ohm Click the more dropdown to select from common injector presets This changes the spray pattern that different injectors need to operate efficiently Refer to Offset in the Fuel Multiplier dialogue from the previous chapter for more information To check Ohm impedance use an Ohmmeter to test resistance across the injector pins With the Honda ECU a minimum of 10 Ohms between the injector positive lead and the ECU ground is required to operate efficiently 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David Di DE Ek G ITY Mo IMPORT a tae J CROME v1 6 2 PRO DEALER USER MANUAL s Injector Battery Offset advanced no longer used do not alter this table Per Gear Fuel Trim some ROMs default at 2 00 200 in this section so be aware of this when importing tables from another ROM It s best to change this to 1 00 100 right away as 200 is the maximum value however it s ideal to have more fuel in lower gears This is where
8. 2 User Manual revision 2 0 March 10 2012 by Miles David G ViT te IMPORT be f A ba E CROME v1 6 2 PRO DEALER USER MANUAL f A Engine Capacity displacement can also be helpful for calculating fuel for new compression ratios as a percentage difference multiply your existing compression by 10 and enter it as Old Capacity Multiply your new compression ratio by 10 and enter it as New Capacity Next select the Advanced tab note the Final Multiplier from the first page For general purposes O2 and tip in should be kept at 1 00 unless working with special fuels E85 race fuel nitro Cranking and Post Startup should be slightly higher than the Final Multiplier Finally Offset should be gradually increased in increments of 10 00 until the idle remains steady at 14 7 1 AFR and surging ceases This is strictly trial and error see Injector Battery Offset before adjusting offset Click OK and the multipliers will be applied to the rom Hain_ Advanced k Ok Individual Fuel Correction Cancel Scalar Offset Final Multiple 0 228 fz20 0z 1o00 O still compensates for 14 771 Cranking o3 o Fost Startup b3 0 Tip ir oA Tip in Adatl 1 000 iii ITB Tools Plus Jr 0 1 Use with extreme caution tuning ITBs with standard ROMs it is HIGHLY recommended to use a Gold base file for tuning Alpha N however it can still be done proficiently with a P30 base The remainder of ITB calibration is outlined
9. 20 1 00 1 00 VTEC Switchover nin 7th 2 2A 2 2A 219 189 139 101 1n YTEC Load Threshold YTEC Load Threshold h p ECT ign Correction retard 1 l l Adjust fuel compensation for a given Engine Coolant Temperature 1 00 means no correction ECT ign Correction retard 1 Adjust fuel compensation for a given Engine Coolant Temperature 1 00 means no correction ECT ign Correction retard 2 Above means more fuel Below means less fuel Warning This is an advanced feature and should ECT ign Correction retard 2 Above means more fuel Below means less fuel Warning This is an advanced feature and should ECT ign Correction advance 1 only be changed by someone with full knowledge of its functionality ECT ign Correction advance 1 ECT ign Correction advance 2 ECT ign Correction retard if IAT lt b5h IAT ign correction Injector Battery Offset Stock Injector Battery Offset Advanced Per Gear Fuel Trim Base Ignition T able I only be changed by someone with full knowledge of its functionality ECT ign Correction advance 2 ECT ign Correction retard if IAT lt b5h IAT ign correction Injector Battery Offset Stock Injector Battery Offset Advanced Per Gear Fuel Trim Base Ignition Table Basemap ROM P30 Engine ROM P72 4 Base P30 E Often times the increments for these tables are different they don t have to be perfectly interpolated since they have to be tuned later anyway so don t spend too much time here The s
10. 25 2175 20 00 1750 3425 34 25 2775 2275 2150 2000 36 25 36 25 2900 23 75 2225 Table value Rotation TDC full compression Ignition tables F5 F6 are relatively consistent with the general rule of thumb that the more torque larger fuel value in any given cell the mixture will reach peak combustion faster needing less timing advance It is strongly advised to have a full understanding of combustion and detonation engine knock before modifying this region b Graphs F3 Useful for observing tables in a more fluid form to estimate peak torque cross reference fuel and timing relationships and easily identify any kinks or glitches in tables that may cause erratic performance More detail will follow in later chapters Low Cam Fuel x 1 000 FULL THROTTLE BOOST 1035 mbar Each Line One MAP column Curation rms CLOSED THROTTLE AREA rpm Graphs are essentially turned 90 counterclockwise from the tables although timing lines will appear inverted since ignition values usually decrease as fuel increases with graphs MAP lines move independently rather than fixed like columns 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 4 PLUGINS AND ROM OPTIONS F4 For non Gold files other than P13 only the supported P30 ROM will be used for demonstration Before continuing with any P30 based file opt
11. View basic information about your computer Device Manager Windows edition SR Sea ae Windows 7 Ultimate System protection Copyright 2009 Microsoft Corporation All rights reserved Advanced system settings Service Pack 1 System Manufacturer Lenovo Model Lenovo Win PC Rating 58 Windows Experience Index fle mot 6 While in the Device Manager locate and expand the Ports COM amp LPT tree and plug in the datalogger USB The device should appear under the tree as USB Serial Port COM___ Double click the port to open Properties Change the Bits per second aka baud rate to 38400 select OK and keep the Device Manager open Device Managen Communications Port COM1 Properties ax E TE Port Settings Driver Details Resources ee per second Data bits a File Action View Help gt 2 amp E VIRTUALXP 76148 H a Computer Es Disk drives oa Display adapters Fk DYD CD ROM drives a Noe a e Floppy disk controllers Baily Nowe ii H A Floppy disk drives nae EE IDE ATAsATAPI controllers stop bits li w Hi Keyboards Ty Mice and other pointing devices Flow contral None i BS Network adapters Non Flug and Play Drivdrs Ely ote SiN Fi Sore uini Sin rik Fii ee Y Printer Port LPT1 i Sound video and game controllers H Storage volumes cs System devices E Universal Serial Bus controllers 2011 GravityLabs Inc CROME Cui
12. and 2psi and refer to section 20 for boost table adjustments e Compression stroke changes a handy little trick export your tables to a new file Match atmospheric pressure with the B10 column Install Advance Boost Tools with default settings or add 6 columns to Gold tables Use Tools Boost Table Adjustments and retard 1 for every 1 CR point increase over stock i e GSR 10 6 1 new CR 12 1 boost retard 1 4 Ignition Table Adjustments C Do not make changes Initialize to highest normal value i Retard ignition b EE degrees lb boost Fuel T able Adjustments f Oo not make changes Copy columns 3 B16 and paste them to columns 1 B14 Then export the calibration You may need to raise some of the top left cells back to base timing values and smooth out some select regions if the timing retard is aggressive 2 3 4 5 6 7 s 9 10 B11 B12 B13 B14 B15 B16 114 201 288 403 576 750 865 923 981 1038 1161 1284 1407 1529 1652 1782 27 21 24657 2209 18 70 13 617 s487 5 09 3397 1687 0 007 18 3 6 5 4 7 1 8 9 10 8 16 50 14 00 9 25 4 00 100 225 3 50 6 00 6 00 6 00 6 00 6 00 16 50 5 00 10 00 6 00 6 00 0 25 6 00 Shift all cells 2 columns to the left This is just a general trick only experience will help you improve estimates f Quench Zone and Milled Surfaces Different cylinder heads have different quench dynamics wh
13. if possible Not all MAP columns will be achievable Focus primarily on 1 3 and 2 3 atmosphere then use a MBC for boost columns or just a partial throttle if necessary Disregard MAP tracing for full throttle manifold pressure is expected to change Tune fuel first low cam then high cam Quad cell comes in handy for inertia dyno tuning You may also find a benefit from row and column tuning with more experience O If a row or column is extremely similar to another you can omit it and shift all the other cells over This is totally optional but it can help make tuning easier and faster Tune timing columns from left to right left will always have higher timing values than right columns and this avoids interpolation issues Use the MAP tracing method and save the dyno graph At part throttle the engine may not accelerate all the way to redline it s okay not to tune cells above that point you can interpolate them with other achievable cells later Tune ignition next raise ignition by a few degrees based on your comfort level and do the same pull again Overlap the two dyno graphs and see which RPM cells are making more power on this run Continue raising timing and comparing graphs E If the cell stops making power stop increasing timing for that cell and be conservative when increasing neighbor cells you can select the region and Toggle Tuning off gray for the cells in the Tuner Toolbar to freeze their position Co
14. in Chapter 8 7 Unused Plugins can be removed or rearranged in the menus by selecting Plugins Plugin Manager and selecting individual scripts by their file name To add or reinstall a plugin simply click Install New Plugin and search the directory 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL ara G gt g IMPORT CHAPTER 5 TOOLS AND SETTINGS 1 Advanced Tables L this tool is explained first as it is relevant to comprehend in order for the next topics to be properly understood This is only available on standard ROMs but the tables are also implemented in the CROME Gold ROM Proceed to Tools Advanced Tables a Closed Loop Control focus on the CUT curve first for the most part the RES curve will always have slightly lower values Determining these triggers should be based on when the O2 is no longer functional such as any target AFRs richer than 14 1 b IAT Fuel Compensation cold air is denser and needs more fuel to maintain proper mixture This along with most fuel and timing scales should be datalogged thoroughly from stone cold to heat soaked and plotted on a graph to derive percentages Motors can benefit from adjusting this scale for rough cold starting or if excessive fuel fluctuations occur during warm up Adjustments should be made based on percent as 1 00 100 0 94 94 and so
15. lower settings to comect connection problems Select higher settings for faster performance J nhay 14 J nho ae t point This is the same process used by GravityLabs to configure personal and commercial laptops If these procedures do not work refer to the troubleshooting section of this manual or www PGMFIL org for more technical information on this process 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David HRA AVI IMPORT jez CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 3 BASIC ROM EDITING For the purpose of this manual many fundamental and integral elements of ECU theory and tuning have been omitted as this manual focuses primarily on the functionality of the CROME program Please visit www PGMFI org for in depth technical details and full explanations on the nature of this program Examining basic features a Tables F2 these reference the MAP sensor to detect load and the Engine Speed RPM sensor to find a value the ECU will can calculate to log data and send signals Two of the tables are used constantly to run the motor Fuel and Ignition Timing F5 F7 fa fa g 2h x lgnition Fuel Tables Gee Injector Duty Cycle w A db of MAP 519 6 634 millibar of atmosphere 14 55 11 16 inches of mercury and or IPSI common display on 255 boost gauges o 258 o 258 pulse width in microseconds an injector stay
16. on c ECT Fuel Compensation the same concept from the IAT but more involved o Open Loop any terms when the O2 is not compensating for fuel or if the O2 is disabled Tuning is reliant on IAT so both of these values should be plotted together to determine which should be scaled more aggressively o Max Bounds high load at colder temps usually needs more fuel so these values should always be higher than Open Loop o Closed Loop since the O2 compensates fuel on its own this should usually stay at 1 00 100 unless the fuel needs at the point where system switches to closed loop are still more than 25 above normal o Auto Tranny if applicable the ECU will use this table instead of any other tables as the torque converter has a different method of distributing load If excessive gear switching is noticed try adding compensation o 0016fh this number is the hex address on the chip for where this scale is found but so far there s been no development on what it s for d ECT Fuel Idle Compensation really only for minor adjustments during idle or within the Resume range of the IACV e Post Fuel Compensation a simple map that the ECU uses right after starting the engine until the ECU collects enough useable information from the ECT IAT f Crank Fuel Compensation useful for ironing out cold start issues Start excessively lean and gradually add pulse width Do the same for Post Fuel if the engine doesn t
17. re using a resistor box for low impedance injectors or you WILL burn up the ECU drivers We need at least 8 ohms in the circuit 12 16 is ideal which spans from the fuse to the ECU pin Test resistance between the injector pins if it s not over 8 ohms install a resistor box The offset adjustment in the fuel multiplier is more of a global parameter that shifts the preset scale You always want to start with a preset that s the most similar to the cc flow rate and impedance but if there s multiple that match the criteria pick the one with the lowest advanced offsets Disable the ELD and disconnect the alternator First you ll adjust the advanced fuel corrections latency from your lowest voltage point typically in 10us increments Make sure the surrounding values aren t drastically different i e 1200 and 300 If it stutters or attempts to start slowly keep raising your lowest voltage value and start adjusting the next highest value Offsets will always be higher at lower voltages Once you get it running turn it off and make sure it starts again Sometimes it won t so try stepping the offset back a little Attempt to run the vehicle to normal operating temperature for accurate readings Start hiking up the general offset adjustment in increments of 20 If you see little change try adding 50 You should see the AFR gradually change until it becomes stoich 14 7 for most pump gas cars but some inefficient or high flowing injecto
18. stay running or hesitates gurgles g Idle Speed vs ECT helps warm the engine during colder operation Rarely should this ever exceed 2000 RPM Standard cold hot is approximately 1500 750 h Idle Speed moving vs ECT helps protect the engine from dying and helps synchronize gears while switching from neutral to gear Advance only if necessary If you find it difficult to engage gears from neutral while moving reduce these speeds 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G ma he ey D CROME v1 6 2 PRO DEALER USER MANUAL i Individual Cylinder Trim sometimes used for changing the fuel multiplier without changing duty cycle when importing custom ROMS to a new file It s NOT recommended to do this unless you are highly experienced Otherwise some motors especially B series can run leaner in one cylinder so this allows the ROM to compensate and prolong the life of the motor as well as increase power VERY dangerous to modify without datalogging EGTs for each cylinder j VTEC Switchover much like the plugin the best way to tune this feature is on a dyno although fuel graphs can be used as well This is the point the ECU signals the VTEC solenoid to engage and switches the ROM to the secondary tables VTEC tuning is explained in later chapters k VTEC Load Threshold divides the VTEC crossover point dependent on a MAP value Beware tha
19. the Individual Cylinder Trim tool can be used to set all 4 cylinders at 200 With this tool it s best to tune 4 or the closest 1 1 gear perfectly Then run a datalog for each gear independently Compare AFR results and adjust accordingly 1 and 2 gear should almost always run richer and for daily drivers 5 gear can afford to be a few percent leaner u Base Ignition Table a useful option for global timing changes for a broad RPM range This can save time while tuning engines that are expected to require a lot of ignition changes rather than changing individual cells This should really only be used if the engine has a drastically different timing curve such as an H22 imported to a P30 2 Tools Fuel Multiplier as explained in Chapter 4 as a plugin for non Gold ROMS this tool is also integrated in the CROME Gold ROM under the Options tree which we will explain here With an open CromeAu Base file select Options F4 and perform the following iss Tables AC Graphs F Options ay Fe zA i lgnition Fuel Tables Gt Injector Duty Cycle KM A ka l Fuel Corrections Ignition Corrections ig Idle Injector Sizing lt a Rev Limits General Fuel Corrections Advanced Fuel Corrections Ry VTEC aii Boost Settings Fa System Events l Emissions Control injector Size RC Engineering 1000cc 95Ib 30hm kI AC Control le Diagnostic Trouble Codes Offset Adjustment 220 microseconds E TPS Calibration MAP
20. the MAP VTEC Engagement _ iS rep consistens incite ein test net eer ee e the low load threshold higher than the actua E High Load Engagement 15245 r value used for the test unless it s specifically for gh iii i dual stage boost Load Threshold T30 mbar e Nitrous Meth Injection tuning comes last o Unless the injection system is staged or gradual this should be tuned last For load dependent water meth injection systems treat this as a completely separate tune It will require new values for all affected cells and even a new VTEC point may be needed o A2 timer ROM stacking device i e Moates 2 timer is beneficial for those who use injection systems sparingly Visit http support moates net 2008 08 30 2timer for information o Use Options System Events and create a base with the following conditions Enable with BS ACS AC Switch 7 invert input Conditions Actions Condtonz Actions Output to A17 IAB Secondary Runner invert Exclusions Map Adjustmetns M Disable on CEL RPM ign Fuel us W Disable on Standstill ow o mom Minimum Maximum 3o00 oo 0 Engine Speed 4806 a522 rpm 3500 oo Engine Load 800 1782 mbar sooo ooo o Vehicle Speed 40 159 mph S Throttle Position 95 112 5500 800 502 Intake Temp zee 2a F 6000 800 B02 Coolant Temp 140 284 F zooo 800 502 sooo 800 502 sooo S00 502 inno Obviously any input and output can be used or no input o
21. the datalog scroll bar and navigate with left and right buttons to help find the highest soeed MPH at the top of every gear Scroll through the next higher gear to find the RPM point that matches the highest speed of the last gear That s where FTS should be set i e in 1 gear the top speed at 7900 RPM is 30 MPH rii gear reaches 30 MPH at 5750 RPM so the Gear Range 1 to 2 will be set at 5750 RPM You may need to adjust this through trial and error if the RPM dips below the selected value after a shift raise the value You may also benefit from tuning this on a drag strip but otherwise just comparing the time spent from the bottom of one gear to the top of another is a good way to compare shift delay if you re really trying to narrow the gap 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David Di _ he IMPORT on f j CROME v1 6 2 PRO DEALER USER MANUAL f A ATTACHMENT 3 HOME MADE ANALOG DET CAN KNOCK EARS As a disclaimer there are no implications that all detonation can be heard with this device with that said the same disclaimer comes with professional electronic knock ears Use at your own discretion Supplies e 6inches of inch diameter standard plumber s copper tubing e 6 feet of inch diameter thick walled rubber fuel hose smaller hose can be used with a reducer from the copper tubing or by tapering down the copper
22. this helps avoid a bug that crashes CROME when the dlf file is too large and the Dyno Tools plugin can t process all the data Specific part throttle ranges can also be logged for fine tuning other ignition values but it is very difficult An alternative to using the Dyno Tools plugin is comparing Datalog Telemetry graphs using the same principle of speed over time Refer to the tuning section for details 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G ZITY Fhar IMPORT te f T 4 F CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 6 CUSTOMIZING A BASEMAP 1 Ifyou do not already have it go to one of the links below and find the file that best suits your engine or application or download the Excel sheet in the file list f A If you wish to skip this step or are having trouble contact a CROME tuner Often times they already have a database of working ROM files for common setups If you have a mix matched motor choose the one that matches your cylinder head 2 When the file is opened click File Export Tables and save a CT2 export file This allows the data to be interpolated into a new ROM that may not have the same row and column values As an example we ll be building a turbocharged USDM Integra GSR B18C1 basemap a Name Date modified Type e F30 JDM B164 N _ P72 Export ct2 3 19 2012 4 26 PM CTA File
23. 100 is best and divide by the amount of total columns 16 is default for 1 782bar boost so 1782 100 16 118 rounded up So the Increment By value is 118 yielding peak boost at 1782mBar Increment By mBar StartingAt TotalColumns Of course if your MAP is a GM 3bar 29psi but your target boost is only 2250mBar 18psi then only calculate just above the target to avoid useless columns say 2400mBar 20psi You should change your second to last column to target boost or atmospheric pressure for ease of tuning even though this may throw off distribution e RPM Adjustments for ease of tuning and comparison it s ideal to use the same range for the high and low cam If your application makes power over 7900 RPM select Options Table Properties Use Extended Low Cam Rpms and use the MAP formula for Incremental adjustments 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David fn Bronn J TaN i CROME v1 6 2 PRO DEALER USER MANUAL 7 1 Note the existing scales in the rom as well as the settings mbar 215 338 454 569 692 807 923 1046 1161 1399 2i 1638 1753 _1782 vacbst 26 897 23 50 19 887 16 46 13 08 945 50r 265 0 5 914 107 11 TA 500 Oa ea doa dss 239 324 a83 A3 459 S04 G83 T91 oat 1082 1238 948 26 66 1379 28 Rebuild Tables 1810 29 i 2240 2g m Columns Low Cam Rows M High Cam Row
24. 16 gai 1039 1284 1284 1407 1530 1652 1782 mb 1284 1407 1530 1652 1703 1782 22 3 0 46 6 6 a4 10 2 11 9 13 8 6 6 a4 10 2 11 9 12 7 13 8 Column values to the right of a changed column MUST be changed to an equal or higher value Notice there isnt much difference in fuel between column 10 amp 11 By double clicking the mbar column value wa can change that value to the next most relevant value The same can be done for RPM rows just don t change the first OR last column row as it may corrupt the ROM Always be sure to save a new ROM instance before any significant changes You may notice the boost area is grayed out this is normal Toggle On the Tuner 8 CTRL T if the tuner bar is not at the bottom highlight the cells and click the Toggle Selected Cell icon iF LY Py sy Live Turning t Smart Tracking gt Bl i Live Auto Adjustments w Auto Adiust Maps 7 0 Clear Recordings ii FuelTools This should be used after applying BoostTools or ITB Tools This skews multipliers in the ECU related to fuel calculations and delivery If your fuel system is modified this is an essential tool After installing the plugin navigate to Tools Fuel Multiplier F and enter injector and rail pressure information and or any changes made in displacement Engine Capacity Old Engine Capacity 106 Yi cc New Engine Capacity U0 Yi cc Adjusted Multiplier 0 249 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6
25. 4 25 Enter Values Enter values for each target Cold Idle Cut Cut the highest RPM the Cold Idle Resume IAC V will operate at warm Idle Cut While moving the ACV helps warm Idle Resume reduce part throttle jitters Moving Idle Cut Resume when the IACV Moving Idle Resume turns back on If it dips too low raise the Resume values Most performance motors will need higher idle resume although there is no generic profile Cams and applications with heavy fuel flow that don t operate well under leaner conditions or low RPM will often try to rev even during idle so idle cut values may need reduction if surging is too extreme ABT Map Cutoff seemingly for older engines using a missing link hack on a stock MAP sensor There is no modern application where this unit is used as it has been deemed too dangerous and unreliable ABT Close Loop MAX Load Edit adjust what the highest MAP value the ECU will use the O2 for adjusting AFR to 14 1 P30 ROMs do not reference the Lambda table to adjust fuel Advanced VTEC Setup allows user to set specific VTEC points depending on engine load Useful for road racers although only accurately tunable on a load bearing dyno Only experienced professionals with intimate knowledge of VTEC functionality should attempt tuning this Air Conditioning Cutoff by setting an RPM and TPS maximum the A C turns clutch disconnects and the ECU stops compensat
26. B manifold was blessed with individual idle air screws screw them all the way in to make sure only the throttles are governing vacuum Adjust each throttle plate until the values match o Open the global throttle position slightly to achieve 2100 RPM and measure vacuum again Correct any inconsistencies and close the throttle back to idle Part throttle accuracy is more important than idle accuracy Reduce the idle speed to a tolerable value make sure the engine doesn t die on decel If you have individual idle air screws adjust them to equalize vacuum again at the new idle speed do not re adjust the throttle plates o If vacuum will not match regardless of any adjustment or if one throttle is significantly skewed check for a leaky gasket or a valve issue b ROM set up o For P30 tunes install Plugins ITB Tools Plus Jr 0 1 and calibrate the TPS if you haven t yet o Then navigate to Plugins Control and install these tools P30 ITB Tools Plus MAP TPS Crossover Edit sets which column the MAP is cut off and the TPS will take over the rest of the columns ITB Tools Plus TPS TPS Crossover Edit specifically dictates what throttle position the MAP hits atmosphere Tuning for these is explained more later ITB Tools Plus MAP Injector Cut Edit with high efficiency aspiration it is sometimes difficult to create enough vacuum to decelerate rapidly so setting this at the closed throttle MAP value tells the ECU to shut off the i
27. Calibration Additional Adjustments Table Properties E p Enter an adjustment value in 1 percent increments Negative values are Ga Gear Ratios allowed and must be preceded with a minus sign Normally these Ga Misc values should be 0 zero for no adjustments Cranking Fuel Trim Subtract 100 from the final multiplier and this is your result for this area It will always be Post Startup Adjustment NEGATIVE for larger injectors Throttle Tip in Trim To Pe Gih Live Tuning ty Smart Tracking f Live Auto Adjustments w AutoAdjust Mapes Base CromeAu 0 24 Final Multiplier Injector Size has a comprehensive list of common injectors however if the manufacturer and or size is unknown you can type in an estimated cc value for now and adjust offsets in the next section 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David IMPORTS S CROME v1 6 2 PRO DEALER USER MANUAL Offset should be kept at O for now unless you commonly have success with a particular value When you change the injector size the Final Multiplier in the bottom status window will change to reflect a percentage over what the ROM was previously set at usually stock otherwise the scale gets too complex This should be used to calculate additional adjustments or the engine will not run Be sure not to mistakenly use positive percentages for these adjustments Kee
28. For Gold ROMs the Alpha N calibration process is the same as ITB Tools but is installed through Options Table Properties Indexing To find the ITB crossover value datalog gradual acceleration from O to 100 TPS and graph MAP and TPS set the crossover point where these lines intersect The engine doesn t have to run well just to find this number c Special Procedures bi Nail down AFRs if the crossover won t stay consistent or creates a hole in the tables lower the crossover point Use a richer than normal AFR for TPS regions high velocity intake can make a volatile combustion and should be treated with caution Too low of a crossover point will make the trace jump around to random values but usually you will see two or more columns have very similar values in which case they should just be omitted by raising the crossover Ignition should be kept very low and soggy around low RPM ranges where atmosphere comes quickly and is difficult to roll into Because of the lack of ignition AFRs don t have to be super rich here to avoid knocking Stoich often works well although if acceleration is suffering you might consider enrichment Throttle tip in will likely be a problem especially for low RPM See section 8 of this chapter for help tuning tip in For MAP based contingencies like Vtec crossover closed loop and A C cutoff etc setting values closer to atmosphere is more practical as long as the O2 can read the target AFRs
29. J12 is removed on the ECU If the data in this display is updating too slow for your needs go to Settings Tuner and raise the refresh rate but beware this will delay Auto Adjusting a Click on any parameter and the data will show in the large black display at the bottom You will use this very often You can also hit the up or down arrows or a scrolling wheel to change the viewer to the next parameter b The most desirable streams have been consolidated into a Minimal View option so they re easier to view all at once It s safer and smarter to monitor all available streams but sometimes it can help de clutter your tuning processes This might not be available on v1 6 3 c Youcan right click on the display to choose Minimal View or change the basic measurement units This doesn t change the units in Settings only for this display d On the event of a Check Engine Light the CEL value will change to a red On and you can double click on it to see the codes This does not clear them it s only for viewing To disable codes go to Options F4 and select a code to disable e Below the black view box is a slider bar which controls the position of the datalog recording You can move this at any time however it may cause problems for Auto Adjust during Live Tuning It s meant more for scrolling saved datalog files Data Type Walue Engine Speed 2006 rpm Vehicle Speed 37 2 Mph Gear Manifold Pressure 613 mbar Boost Th
30. Labs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G gt S IMPORT i j Ci IA m A CROME v1 6 2 PRO DEALER USER MANUAL In stock ROMs bases the boost columns will be grayed out by default simply highlight them and toggle them through the Tuner Toolbar CTRL T 420 484 524 59 575 438 498 533 563 593 389 448 488 513 538 341 398 446 470 498 select grayed cells and toggle tuning CH Live Auto Adjustments a 4uto Adiust Maps a Clear Recordings Toggle tuning for selected cell E Bar Boosted gt 1Ab 9 For Gold bases Tip in Timing Advance tables should only be adjusted if bucking pinging or hesitation persists with quick throttle shifts 10 Idle should be adjusted while datalogging as all engines will have different idle demands If an idle problem is suspected or stalling occurs keep the duty cycle and idle recovery value high If the IACV is disabled none of these parameters are considered as they only affect the IACV 11 Rev limits o For Vtec engines the low cam limit should be set 1000 RPM above the VTEC low load engagement point but no lower than 5200 RPM This protects the engine in case Vtec doesn t engage High cam limits should be set just above the peak power point or 200 RPM higher than the shift point o The Standstill Rev Limit AKA launch control or 2 step needs to be tuned There is no magic number it changes for every car and every driver As
31. Lambda Recording Conditions Data outside the tunable range will show red in the live data window o Make sure the direct wideband readings from either voltages or wideband software such as Innovate LogWorks match the live AFR values in CROME It s better to customize the Settings Tuner Logging Lambda Conversion Table to match whatever was programmed to the wideband controller but the Lambda Offset Correction works for small offsets o Achieve a stoich AFR at idle Remember that adding fuel or timing will increase idle and the ECU will add or subtract either to achieve the target idle Ifthe idle sinks below target idle at stoich AFR check to make sure the live ignition timing isn t lower than the table value then manually adjust the idle screw on the throttle body 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G ma he ey D CROME v1 6 2 PRO DEALER USER MANUAL Ifthe AFR is achieved and live ignition timing is higher or lower than the table value try adjusting the idle screw on the throttle body first If there s no improvement make sure the scales in advanced tables ignition corrections are at 0 for normal temperatures Otherwise the distributor base timing might be wrong use a timing light to recalibrate it according to the service manual Sometimes an engine may not be able to idle at low speeds due high lift cams larger or individual
32. P by 3 and add an extra 1 to high RPM ranges Throttle Body add the percentage of size over the stock one to high RPM ranges Manifold Always add 2 to high throttle under 2k It s best to compare the company s dyno graphs over stock add a percentage for each area where torque is higher For short runner IMs add 8 to the top half of the RPM range The longer the runners the lower the power curve shifts For large plenums add more to the bottom half of the RPM range and enrich the Tip In by 3 Porting add 8 to everything over 400mbar It s very difficult to predict the needs of a ported head as all jobs are different Cams best to compare dyno graphs from the company if possible Otherwise calculate the percentage of lift and duration over stock and add it to the Fuel Multiplier or the entire table i e average ITR 243 at 11 5 divided by original GSR 240 at 10 7mm 243 240 11 5 10 7 2 1 0125 1 0747 2 1 043 100 4 3 Cam Gears advancing moves the torque curve down which will demand more lower and mid range RPM fuel Retarding reduces low RPM pumping loss and allows better overlap for forced induction using non turbo cams which demand more high RPM fuel b Exhaust Mods backpressure velocity and reversion scavenging will affect combustion heat and efficiency but the biggest change in fuel comes from how well the cylinder is scavenged For all motor you won t usually see more t
33. RO DEALER USER MANUAL 8 5 continued Select the proper hardware and port COM number will be black if it s available The Baud rate for most RTP and Burn hardware is 920000 however Xtronics Baud rate is usually 115200 Open the properties of the associated port in the Windows Device Manager and change the Bits Per Second to 920000 or closest given value may be shown slightly higher 1 Even if using the Ostrich or ROMulator select the tick box Used for 27SF512 unless you are specifically using an obsolete 27SF256 chip with a Moates or Xtronics chip burner 9 Ifyou are using a chip burner and emulator by the same company i e Pocket Programmer and ROMulator or Burn2 and Ostrich 2 unplug your chip burner and observe the new port number in Device Manager while connecting the emulator Otherwise skip this step If you are using a chip burner and an emulator by different manufacturers refer to step 8 and set up the second device using a unique port number Again available ports are shown in black under the port list in CROME settings Double click the properties for the port select the Port Settings tab and click the Advanced button At the bottom change the port number to the same port that was designated for the chip burner this allows the user to swap devices without having to constantly change the port settings in CROME _ Advanced Settings for COM3 ii Use FIFO butters requires 16550 compatible UART Select
34. You can log multiple pulls in one CSV file by changing CROME Settings Tuner Logging Lambda Recording Conditions to have strict values but since you can load multiple CSV files in Virtual Dyno it s easier to identify which pull is which f The power scale might not be accurate unless you ve built a perfect car profile but as long as you keep the gear consistent it still works great for comparing tunes g An easy way to change an inaccurate power scale is to adjust the Final Drive value up or down or change the weight of the car Your VSS must be working properly Option 2 CROME DLF Plotter created by Dan Westerwick ddd4114 http www gravityimports com CromeLogPlotter exe http www gravityimports com dotnet4setup exe required Instructions 1 File Open and select a dlf file Tools Preferences and select the proper wideband used Tools XY Plot and select ET s for X axis Select values to plot and name each one or it will not plot it Click Refresh and the graph will appear Select an instance on the graph and the real values will display in the bottom box Always add ET s in the series so you can reference the time of the values oe ae oe a 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL ca Ie Tne let gt ae Scaled Sensor Reading 129 59 172 41 215 47 ET 3 Ti
35. a rule of thumb default this where the engine makes peak torque or wherever the turbo can efficiently spool for the 1 gear target o The Rising Rate Rev Limiter purpose is unclear It was thought to be used as a protection against clutch slipping or a special burnout launch tool however nobody has confirmed either o In shift rev limits will be grayed out unless a Clutch Input is selected under 3 Stage Rev Limit and this should be left disabled until after primary tuning is completed o Per Gear shift indicators should be changed depending on reaction times for each gear and if Full Throttle Shift is engaged adjust in shift limits first o 3 Stage Rev Limit Parameters Full Throttle Threshold should be lowered if the engine revs past the target before the throttle threshold is reached This is only expected with ITB and supercharged applications usually 50 works fine for most engines o Standstill Threshold should typically stay slightly under the speed value of 1 gear at the target launch control RPM i e if 1 gear yields 20mph cruising at 5000 RPM set the threshold to 15 However 3 step can also be used for burnout control if the Clutch Input is affixed to a dash switch in which case the threshold should be over 80 o Clutch input is preferably routed to B5 or B8 or D2 only if the original brake signal is removed or if engine assisted braking is desired If the limiter is always enabled check Invert Input Most are routed to g
36. agree to have a solid understanding of engine theory and will proceed at your own risk 1 Set up a Wideband Install a wideband O2 controller with the 5v wideband signal tapped into ECU pin D14 o Unplug the existing O2 sensor from the harness to avoid crossing signals o Disable the O2 Heater Circuit in the ROM o Perform a fresh air calibration on the wideband before installing the sensor if needed o Be sure the sensor is located between the catalytic converter and the engine not after the cat If the sensor is located close to a turbocharger be sure the O2 bung is extended or heatsinked to avoid overheating the sensor b General Precautions Be sure injectors and charge pipes are properly installed Check boost controllers MAP and TPS sensors are properly calibrated Check spark plugs for the correct heat range and operation of external ignition units Check for leaks and fluid levels Check battery voltages O O O O O If an external piggyback controller is installed VAFC NEO etc initialize settings or uninstall the unit so it does not interfere with readings c Start up o See chapter 5 1 r and 5 2 for general battery offset correction In some unusual cases general injector tuning may not work Refer to Attachment 1 at the end of this manual for more help on advanced injector calibration o Warm to operating temperature Make sure sensor data is within the tunable range or adjust Settings Tuner Logging
37. ame process can be done with a Gold ROM through the Options F4 tab gt IAB Notice the Gold table values show percentage but stock ROMs show a multiplier 1 00 and 0 are considered the same value between these types so in order to convert a stock multiplier to a Gold percentage simply subtract 1 00 from the value and move the decimal two places to the right IAT Correction in 1 daiis increments s Heme oo Je Houle Temp F 284 Open Loop 1 25 1 20 1 16 1 08 i q7 1 42 1 35 1 28 1 20 Correction aoao o eo oo 60 60 ao Bounce t Closed Loop 1 00 1 00 1 00 1 00 Auto Tranny 1 00 1 00 1 00 1 00 nnd FF 159 139 1 nn 1 nin Open Loop ECT Correction 1 ae increments sl 4 Temp F 171 Adjust fuel compensation for a given Engine Coolant Temperature 1 00 means no correc Above means more fuel Below means less fuel Warming This i an advanced feature al only be changed by someone with full knowledge of its functionality High Load ar aso a o4 7 Refer to Chapter 5 and configure your fuel system 8 For the P30 or P72 base adjust the MAP sensor through Advanced Boost Tools For Gold go to Options MAP Calibration and select your MAP sensor Then go to Options Table Properties and extra columns As a general rule of thumb add an extra column for every 3psi When you change back to Ignition Fuel Tables it will prompt you to Rebuild Tables see Chapter 5 4 for more details on this or select default 2011 Gravity
38. at the designated cutoff You may also opt to setup custom controls in System Events that are TPS based since you will likely spend most of your time driving in the TPS columns 8 Throttle tip in change Settings Tuner to a high refresh rate to catch quick changes live or use a high sample rate if you re tuning from a data graph much easier Log fast and slow throttle changes and adjust the tip in percentage based on the percentage off lambda during the AFR spike If there s no spike you re done 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G Vy ax IMPORT 7 CROME v1 6 2 PRO DEALER USER MANUAL ATTACHMENT 1 ADVANCED INJECTOR TUNING Explanation Injectors have a certain amount of delay latency before they actually begin delivering fuel and this latency varies depending on voltage and resistance as well as the characteristics of the injector In order to make sure the engine receives fuel at the exact time it needs it we advance the timing in microseconds to make up for the lag This way if you re delivering 100us of fuel the engine actually receives it which is best measured by the AFR at idle 99 of the time there s only three voltage parameters you ll ever encounter 11 7 12 8 and 13 9 To determine whether you ll use a lower scale you ll just have to log the voltage while turning over Please make sure you
39. ave been recorded and the auto tune process will be halted try reducing the sample count interval or logging more values this message can also be a bug which might just require you to navigate to a fuel map F9 then F7 or restart CROME o Sampling Rate Priority higher refresh is better for updating live values faster when datalogging which is useful for tuning parameters other than fuel tables Higher sampling rate will help fulfill the auto tuning minimum sample count This is something you ll likely adjust with every tune f Data Graphs defines values that will be shown in View Datalog Telemetry D which is covered in chapter 7 In order to access telemetry the Tuner Toolbar must be active and a completed datalog file must be loaded in it The telemetry provides two graphs which you can customize for any analysis you need The following are a few combinations that you may find useful General Fuel Tuning RPM MAP AFR General Timing RPM and Ignition Advance vs MAP and AFR Battery Offset ELD Voltage and Injector Duration vs AFR and RPM IAT and ECT Compensation VSS and MAP vs IAT and ECT always compare both Per Gear offset Gear MAP AFR Settings Tuner Logging Throttle Range 98 110 Per Gear boost control Gear Boost VSS Tuner Logging Engine Load Boost range ITB Alpha N calibration MAP and TPS vs RPM and AFR g Dyno Tools albeit ineffective since the plugin is underdeveloped if you have a desire t
40. causing issues at idle or partial throttle o Closed throttle AFR should always be leaner than stoich and or partial throttle o Keep values between closed amp partial throttle smooth using the same values for two obviously different events will cause bucking and other unwanted behavior o Advance closed throttle ignition slightly higher than partial throttle This usually dampens bucking at leaner AFRs Check the spark plugs just in case o Ifthe fuel gap between closed amp partial throttle is too wide try interpolating either the AFR for the second column or the MAP value itself 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David faery G eX Se IMPORTS f A CROME v1 6 2 PRO DEALER USER MANUAL 4 Inertia Dyno unlike the load bearing dyno you cannot hold an RPM limit it simply simulates a basic driving resistance so the process is more similar to street tuning a b c d Startup Tips Use the same procedures as load bearing dyno tuning except the MAP is held or TPS especially when tuning ITBs instead of the RPM E O For part throttle try to maintain a consistent MAP or TPS signal through the entire RPM range some find it easier to trace a graph line with the live plotter in F3 the closer you can maintain the triangle to the graph line the less interpolation will occur Avoid tip in or quick throttle changes
41. decrease in timing needed to combust the mixture unless the timing was already conservative in the region For mild bolt ons the stock settings are best for now b Cams and Porting usually affects the entire table including tip in One thing that commonly happens with cams is right at the VTEC and IAB crossovers there will be a big velocity change which should reflect a considerable dip in timing 4 to be safe With higher compression the dip could be even lower Since this is otherwise difficult to generalize beyond retarding 1 for every additional degree of lift or 2 for intake porting over 6 00mbar it s a good idea to keep graphs about 10 below stock and tune it out c Exhaust Mods increased exhaust scavenging efficiency may cause higher combustion temperatures as spent gases can act as an ignition retardant hence the invention of EGR systems so high flowing all motor engines should consider stock timing in full throttle and supercharged engines should use a more aggressive ignition retard in boost areas 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David dd to ae a ee pee eee ee i E Se l I I I I I l I I I I I I I I I I d CROME v1 6 2 PRO DEALER USER MANUAL d Pistons for lower compression advance ignition 1 for every 1 CR below stock only in ranges below atmosphere Keep stock ignition between full throttle
42. erably between the 2 and 3 cylinders 7 This will amplify the combustion noise in the copper tubing and travel through the hose which makes a droning and tapping sound If detonation occurs the frequency is usually around 7kHz which you can hear here http www youtube com watch v GGJZ6kKzLus If the humming is too loud try insulating the system better or moving farther away from the intake 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL ATTACHMENT 4 EXTERNAL GRAPHING Option 1 Virtual Dyno app by Brad Barnhill http www bradbarnhill com projects VirtualDyno Instructions a Install the application and open it b Start a new datalog in CROME make a full throttle pull from idle to redline in your gear of choice stop the log and save it as a CSV file not a dlf file BP Url rh se fala Pome FF PS Se A SF PRG ATP 2 fost LIRA IH e ele IIs EH File name th Gear pulls Datalog Files Cancel Save as type Datalog Files CSV All Files c In Virtual Dyno Load the CSV file CTRL L then input the Occupancy Weight then select a car amp gear from the drop down menus The graph should then auto populate d You can adjust the RPM range a good idea with the slider at the bottom This can filter out low RPM tip in random bugs or to help focus on a specific area you re tuning e
43. ery lean at first k o Notice the difference in spool time and the familiar bump in fuel curves For most purposes higher trims and lower A R need higher turbo efficiency percentage but any forced induction system is better rich rather than lean on a basemap For example a TO4E pushing 24psi had worked well at 210 e Timing retard can vary depending on heat compression cam velocity backpressure etc so there s no safe way to generalize this When in doubt go with 1 per 1psi If your target is under 10psi you ll rarely need over 0 5 per 1psi for most applications 21 A few things to remember o Save anew copy of your file or export your maps before you make major changes to a ROM There s a good chance you ll need a backup at some point or another It s always safer to have low timing and high fuel If a basemap won t start it s most likely an incorrect injector offset or a bad file See troubleshooting for more information 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G i gt IMPORTS s CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 7 DATALOGGING 1 Ifyou have RTP real time programming now is the time to open the Real Time Programming bar Put the ROM to the device and select Realtime Update to keep it updated 2 The integral part of datalogging is the toolbar so we ll dive into this first It s important to under
44. eset to safe standards 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G ma he ey D CROME v1 6 2 PRO DEALER USER MANUAL The high and low cam fuel maps each have their own set of target tables which can be manually switched in the toolbar or with F7 and F8 just like viewing fuel tables AFR needs are different for each motor and due to the inefficiency of fuel at higher load and RPM the ratio will almost always need to be richer than stoich See chapter 6 18 c for information on compression based AFR and use the default targets for boost ranges b A Lambda Readings F11 are where the action happens Your O2 data shows up here providing the actual AFR lambda readings This is where Data Filtering Auto Fill and Auto Adjustments are applied There are separate high and low cam maps for these also The cells are colored by their AFR reading ranging from red rich to yellow stoich to blue lean so the map can be easily read at a glance To get back to the fuel tables hit F9 or click Ignition Fuel Tables in the toolbar You ll often switch between F11 F12 and F3 F9 after adjustments are applied as well as F5 and F6 when making adjustments to timing tables C Lambda Differential F12 is the same as F11 but compares the actual readings to the target lambda table showing a percentage difference Some prefer this better than F11 for all tuning procedures
45. fficult to reach the upper right cells at low RPM try riding the brake a little to create more resistance but be careful not to overwork overheat your brakes b Ignition is tricky but not impractical The inertia dyno procedure can be followed for ignition tuning but the dyno graph is replaced with Datalog Telemetry D or an external graphing utility Use a notepad to document what timing ranges you ve changed and by how much so if something goes wrong you can easily trace back If Datalog Telemetry is unavailable see Attachment 4 for external graphing utilities Set the Sampling Rate Priority up high in Settings Tuner for accuracy It is recommended to use knock ears either electronic or makeshift det can See Attachment 3 on how to make an effective det can Start with part throttle columns Do a pull at the first achievable MAP column probably column 2 or 3 or 15 throttle You may want to toggle off some columns to simplify this Assuming all AFRs are within lt 2 of target increase ignition in the column by at least 1 and log all cells in the column until they can t be filtered out To dispel some myths the O2 sensor measures a ratio of O2 molecules in the exhaust versus the atmosphere Hydrocarbons unburned fuel take up surface area on the sensor causing the ratio of oxygen on the surface to decrease thus telling the ECU the exhaust is rich in HC When fuel is ignited farther in advance more HC combusts
46. ger efficiency will almost always be much higher than 100 Most modern turbo applications exceed 140 Be sure you ve already changed the fuel multiplier for the desired injectors c Initialize To Highest Normal Value if your adjustments were inaccurate this selection will copy the B10 column values into all the boost columns so you can start over Tools Rebuild Tables extremely valuable tool only available on CromeAu Gold ROMs This should be done before making boost table adjustments First go to File Export Tables and save this process skews all the data If the MAP sensor has been modified in CromeAu as soon as you return to the Tables CROME will prompt to rebuild tables Unless it was done by mistake you should always select Yes DO NOT change the first or last rows of the RPM scale This will corrupt the file a No Change do not select this if the MAP sensor has been updated Often times RPM ranges do not need to be rebuilt for a proper tune but it is also beneficial b Default usually resorts to P30 standards This is a good option for beginners c Even Distribution not recommended for use on MAP columns as the sensor starts at 59mBar and the first 2 columns will never get used d Incremental depending on the MAP sensor calculate as follows mBar is equal to MAP sensor s Bar x 1000 i e stock MAP 1 7bar 1700mBar To calculate even distribution add the starting value
47. han 2 from exhaust O O O For a tri Y 4 2 1 header velocity is most efficient in the mid range For a 4 1 race header velocity doesn t pick up until the top end For turbocharger downpipes backpressure will be evident while spooling which may require more fuel to cool down combustion and spool the turbo faster The larger diameter the downpipe the less backpressure will occur however spooling improves when the exhaust can expand faster so it s wise to add more fuel in lower RPM rows to anything over atmospheric pressure c Pistons there is no need to adjust for compression lower than stock For higher compression use the following table to determine how much to add 12 5 1 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David IMPORT CRVtec Before drf Max Power 157 78 Max Torque 123 47 CRVtec After drf Max Pow r 174 00 Max Torque 140 62 ee ee e e e m N gt A A I I I I I I I I I I I I I l I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Dyno graphs comparing stock cams CROME v1 6 2 PRO DEALER USER MANUAL d Stroke and overbore use the Displacement section in FuelTools for P30 or adjust the injector flow rate by a percentage in Gold to change the multiplier Stroked engines may experience higher compression so compare stroke and rod lengths as
48. however F12 comes in handy specifically when tuning ignition d Knock Recordings is for those using a P30 P61 or P72 ECU with a knock board and the knock enabled unchecked It will log any knock values in degrees of timing retard found Beware that if knock is enabled then this section will automatically record values and will Auto Adjust the timing tables For most performance motors this is not accurate enough to trust with Auto Adjust however it can still be a useful diagnostic tool Remember that values in parenthesis don t have enough data for Auto Adjust and will be filtered out unless more readings are collected Go to Settings Tuner and increase the sampling rate or reduce the Live Auto Adjustment minimums but beware that false readings are higher when less samples are taken 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G T IMPORT 7 7 N S E CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 8 TUNING WARNING This is a guide based on the practices used by Gravity Imports and they may not be the best methods for everyone or they may not work at all for some The only way to become an effective tuner is through practice there are no shortcuts and this standard is not endorsed by CROME or any affiliates We assume no responsibility whatsoever over the accuracy or safety of the following content By reading this warning you
49. however for hotter running or less efficient boost setups the values should be reduced more rapidly This is an advanced tuner function that should be practiced with extreme caution without experience P30 Option Byte Hack if options are not working properly or the ROM is causing a solid CEL Quick Datalogger RTP should be applied to every file where datalogging will be used Without this plugin the ECU does not translate data correctly to be deciphered by CROME VTP VTS Remover use with caution if the engine does not have a VTP or the VTP VTS is acting improperly it can be disabled here The VTP return wire needs to be grounded out Plugins Utilities Calibrate Non Honda TPS Works with the P30 ROM to adjust a TPS that has 0 and 100 throttle values different from the 0 5v and 4 5v norms This is a common utility and often solves several troubleshooting concerns It can tuned by either reading direct voltages or datalogging open amp closed throttle with the key on amp engine off and adjusting the plugin values until readings show lt 0 and 2100 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G TY Faha IMPORT Pa j K 4 CROME v1 6 2 PRO DEALER USER MANUAL gt Selections in the Plugins Control tree include 19 Advance Idle useful for bogging and dying when decelerating or with aggressive cams 20 21 22 23 2
50. ich is why it s suggested to use the base tables that match your head For custom work treat this as a compression change Quench modification is intended to increase swirling for combustion efficiency which may demand less timing to burn For most engines modified to this extent the lowest operable values are generally best to start with 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David Sa a NJAU ie E y IMPORTS j CROME v1 6 2 PRO DEALER USER MANUAL fe A y 20 Boost table Adjustments although more time consuming high power and supercharged applications or high compression with boost should use at least 1 per 1psi for basemapping See Chapter 5 for details on Boost Table Adjustments B Complete all other basemap procedures before proceeding as the atmospheric column is referenced for the boost tables Be sure to match your Atmospheric Pressure to the 10th MAP column in Settings before continuing so the adjustment isn t skewed It can always be changed back later for tuning a The A R size of the turbo can change how fast a turbo will spool In smaller spaces smaller A R exhaust can spin a turbine faster With a large space to travel through more exhaust misses the turbine before it exits so it takes more exhaust at higher RPM to spin it This works in the opposite manner for the compressor side the smaller the compressor space arou
51. ing as one file no auto tuning Graph AFR ECT and IAT if applicable Be sure your Lambda Recording Conditions allow logging at varying temperatures Allow the engine to reach a high temperature with no fan 210 F should be enough Turn off the engine and save the log Graph the log to observe the results As ECT rises IAT should remain fairly consistent so the air density doesn t change the fuel ratio All lines should be gradual if not re test or avoid areas with unusual behavior 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David w G ny S IMPORTS ae i if As 7 m amp 7 CROME v1 6 2 PRO DEALER USER MANUAL ME O Refer to the first achievable cell in the Open Loop ECT Correction table i e 60 and scroll through the log a little until the ECT gets just above 60 Calculate the percentage that the AFR is off of lambda and apply that percentage to the Open Loop ECT correction cell Rinse and repeat for all other achievable cells estimate for the 284 cell Ignition is the same process with the addition of monitoring RPM Retard ignition for higher RPM and advance for lower RPM until the speed is the same throughout the entire log Re adjust the Fuel Correction table if needed b IAT intake temp O i It s recommended to do this after ECT since the IAT is a more controllable variable The setup and start procedure is exact
52. ing for the A C unit above the specified level A good option for daily drivers as well as programming custom outputs gt Selections in the Plugins Misc tree include Disable Enable IACV engines controlled strictly by the butterfly screw ECUs with inoperable IACV circuits and ITB setups benefit from this feature Select X Tranny used for per gear datalogging per gear fuel trim and custom controls 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David Di _ he IMPORT pa f CROME v1 6 2 PRO DEALER USER MANUAL f 4 gt Primary Plugins require thorough understanding and are as follows i Advanced BoostTools This tool adds additional MAP columns for boost ranges skews the columns for aftermarket MAP sensors and customizes the MAP sensor voltage scale that the ECU uses to reference tables Navigate the menu bar to Plugins Advanced BoostTools and select the MAP sensor you re currently using 19 If your sensor is not shown obtain the manufacturer s datasheet and manually enter the specified max and min pressures as well as your atmospheric voltage reading Next enter the amount of boost columns you need generally one column for every 2psi is safe but if you notice fuel values don t change significantly between certain columns you can eliminate them and rescale the values B9 B10 B11 B12 B13 B14 B15 B16 B11 B12 B13 B14 B15 B
53. into CO2 before reaching the exhaust which passes by the sensor unnoticed so the O2 to HC ratio AFR is leaner O2 readings become leaner with ignition advance Check Lambda Differential F12 cells should lean out to more than negative 2 If cells stop leaning out back off timing by 1 and toggle off tuning for the cell Continue advancing the rest of the column until all cells stop leaning Do a final pull for the column save the log advance 1 and log again then compare increments of speed over time or use external graphing utility 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G TY o IMPORTS ba CROME v1 6 2 PRO DEALER USER MANUAL c Using Datalog Telemetry for dyno graphing Using this graphing feature can help us compare speed over time rather quickly without having to export CSV files and fix scales Using two identical pulls with different ignition values subtract the end time at the highest RPM point 3k from the start time at the lowest RPM point 2600 and you get the duration it took to accelerate in that range Compare both pulls using the same RPM start and end points if the duration of the second pull is shorter power has increased If the duration is longer retard timing Data Type Value Engine Speed a epee Manifold Pressure 779 mbar Duty Cycle 220o Ignition Advance Knock Retard NONE Air Temperature 100 22 F C
54. ions select Plugins Enhancements Remove Checksum Routine This tells the ECU to ignore errors when files contain more information than the stock program 1 Select Plugins Enhancements Add Extra Features to install more controls to the Options menu These are basic desirable features for Honda tuning Select Options F4 Tables im Graphs Options Pa JA J i IgnitionFuel Tables Gay Injector Duty Cycle Rev Options Sensors z a l Checked tems are enabled Rev limiter 296 npa Disable knock sensor Disable ELD e Disable atmospheric pressure sensor Target idle T30 l get ajii W Disable injector test circuit IAC Compensation OM Disable oxygen sensor open loop Io lI Il l I lI l I l Disable oxygen sensor heater WTEC Options Disable VTEC speed check 7 Enable VTEC 5872 rpm Disable VTEC coolant temp check Speed Limitter For ECUs that do not take to ROMs well W Speed Limitter 115 Mph Enable debug mode disable O2 and more Extra Features Launch control 3f05 rpm Boost Limit 1035 mbar Full throttle shift 7812 rom Must use clutch 0 3 psi input to BY ECU pin Shift Light Fat 2 rpm In order by section here is the relevant detail for each function 2 Rev Limiter applies to the secondary tables if VTEC is enabled The fuel is cut at the specified value and is restored at the RPM value specified in the Settings window 3 Idle controls the IACV Idle Air Control Valve which allows air to
55. is also the same for inertia dyno tuning 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David w G RY IMPORTS 5 D aoe ri o m A CROME v1 6 2 PRO DEALER USER MANUAL 5 Street Tuning the ultimate benefit in street tuning is real world conditions many prefer to tune on the track they race on Some just can t afford a dyno or there isn t one around within 200 miles At any rate it shouldn t have to be stressed that you can easily destroy a motor if this isn t done properly but with the right skills it CAN be made equally safe and effective v This guide does not condone tuning on public roadways obviously however if you re driving your car to the track it s a good way to get some of the mundane logging out of the way Tuning should be done by a copilot never the driver It s very difficult and often illegal to operate a laptop while driving Live Auto Adjustments comes in handy for street tuning Most street tuning is done in the same manner as the inertia dyno procedure so refer to it if this section seems to be missing detail a Fuel first Make sure the AFR is the same throughout an entire column and it s best to keep AFRs the same for the length of three columns bi v Tune MAP columns from right to left left to right if the basemap is way too lean Low cam first then high cam and then disable VTEC again If it s di
56. l if there is no A C system but D6 VTP is also just one wire to the pin and one wire anywhere on the chassis for ground Uncheck Use VTEC Pressure Switch in Options VTEC then disable DTC 21 and 22 so the VTP can be used as a switch Then go to Rev Limits and select D6 from the Clutch Input drop down menu If this doesn t work another viable option is splicing into the D2 BKSW brake switch but it requires a 12v input instead of ground splice into any 12v source nearby the brake switch has a 12v constant input or take a line from the fuse box and run the other wire to D2 You can cut off the existing brake input to D2 or just splice into it if you have a need for special engine assisted braking PSP also requires a 12v input be sure to sever the existing circuit if you have power steering SCS can go to ground but remove your MIL bulb if you use this unless you don t mind seeing it every time you hit the clutch Make sure the correct gear ratio is selected It s best to check continuity of the circuit with a multimeter first To test ROM function set the limit at 2500 full throttle to 4000 RPM and depress the clutch with the throttle all the way down If it doesn t drop to 2500 check the circuit and the ROM settings Now we re ready to tune Datalog from 3000 RPM up to redline in each gear except 5 for Gold ROMs for standard ROMs just use data from 2 and 3 gear Use Datalog Telemetry D if available or click on
57. ly the same as ECT with the IAT enabled You can use stock IAT correction values as they ll get you closer to what s needed Start the engine as cold as possible Feel free to ice down or CO2 flash freeze the intake manifold and charge pipes intercooler before you begin but stay 6 away from the IAT sensor Remove the intake filter and have at least one hair dryer or similar heating utility ready near the opening For good readings IAT should raise by no more than 1 every second Flip on the hair dryer and keep it about 2ft away from the intake Slowly inch the heater closer to the intake to maintain a slow gain Keep in mind the engine might also start to heat the intake through the manifold and general radiation so don t get overzealous but if you can hit the full range before the engine warms all the way up then the log will be more accurate Incorporate an extra heater along the way if necessary Forced induction IAT commonly gets to 130 and sometimes upwards of 180 Extra heating elements might be needed to achieve this kind of range Optionally you can log IAT during a high boost run to try and achieve the same data but keep MAP and ECT Lambda Recording Conditions tight to filter out variables Ignition is done in the same manner as ECT by monitoring RPM changes just remember to re tune the fuel corrections if the AFR changes significantly ITB tuning to say the least this is very challenging and time consuming If
58. me 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David
59. n a bad basemap It s also great for tuning boost columns but it s a good idea to toggle off tuning for non boost columns o Double Row Column isn t highly useful or accurate for auto tuning but if values are very low it can speed up live manual adjustments Unless you do a ton of tuning you probably won t think to use anything beyond quad cell d Refer to chapter 5 9 g for information on the Dyno Tools feature e This next button toggles adjustment capability for a cell If a cell is toggled off gray the fuel and timing value can t be adjusted automatically or manually This is a great initial feature to ignore cells that are outside of the tunable area high RPMs or high boost cells and for ignoring cells that have already been perfected during tuning f EN This button deletes possible faulty data cells in parenthesis from the O2 F11 or knock sensor before auto tuning See Chapter 5 9 e for more g C5 This button is Auto Fill which is used frequently for initial tuning It will also perform Data Filtering respectively and can be applied multiple times to fill more cells Sometimes this doesn t auto fill a table that you re not viewing so check the other cam table if parenthesis cells have been filtered 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David TEN G ne Se IMPORTS A CROME v1 6 2 PRO DEALER USER MANUAL h Live Auto Adju
60. nal cell value is drastically higher than neighboring cells try smoothing the area and monitoring it again to make sure j E fy GRAPH LINE CROSSING RESULT FROM It s best to do low throttle cells first Fi Fafi i HIGH LOAD VALUES FIRST since their timing values are always higher and this will avoid interpolation issues o For boost columns simply govern the cell you re holding with a boost controller and increase it gradually with throttle In order to maintain real world pumping conditions however try not to use a wide open throttle to hit a target cell unless it otherwise can t be reached With superchargers throttle position tends to dictate the boost cell Make a complete full throttle pull from idle to 7k just to check the power curve for errors bi Enable VTEC and set it to either 3500 RPM or around 1000 RPM lower than stock Again repeat the entire process from the low cam tune c Fuel Combustion Optimization Power Leaning optional o The Target Lambda tables are typically rich for protection but with proper octane and heat control lean engines always make more power hence the term lean is mean Do not proceed unless you have a good understanding of combustion and detonation o This process is the same as tuning ignition You can select either the Lambda Readings table F11 a fuel map or a graph depending on preference Keep the MAP reading up in the live data black window bi Enable Smart T
61. nd the blades the harder it is and longer it takes to push the air through b Trim sizes affect the push and pull of the turbo and ultimately the peak boost The exhaust can be compared to a water mill where larger blades catch more current but cause more flow resistance The compressor trim is basically the opposite wherein the water mill is powering the current but larger blades require more power from the exhaust c Spooling curves can be cross referenced by the flow charts supplied by the manufacturer On a tuned fuel graph you can decipher the spooling curve based on bubbles in graph lines This tuned graph is from a T3 T4 57 trim with 50in 630ut A R on a B18B1 and Arias pistons which was based appropriately at 38 psi and 180 efficiency ANTI LAG BOOST GENERATOR RANGE The Boost Table Adjustment plugin doesn t always account for this correctly especially in low boost so bubbles can be simulated based on expectations Raise all fuel values in the surrounding area where the turbo is expected to begin pressurizing and continue the bubble in a linear fashion see blue area to the range where peak boost is expected 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David j CROME v1 6 2 PRO DEALER USER MANUAL This tuned graph is from a T28 56 trim 50in 640ut A R on a D16Z6 which was based appropriately at 0 35 psi and 160 however the low boost range was v
62. ning Appl Map Smoothing After Tunng Auto Save Datalogs Data filtering removes samples that are too small or extreme Unless the engine has strange conditions this should be checked continued 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David w G RY a IMPORTS ae i if As 7 m amp CROME v1 6 2 PRO DEALER USER MANUAL continued Smart Fill interpolates an empty cell based on samples from surrounding cells In most cases this is helpful but for finer tuning needs especially during map cam fuel switching it should be unchecked Clear Recordings After Tuning is always suggested There isn t much use for keeping old samples unless you re diagnosing a very specific problem Apply Map Smoothing After Tuning should be used with caution and turned off after the first or second fuel run This tends to throw off specific AFRs and generalize them which can cause inconsistencies in power curves Smoothing is best done manually when graph line crossing or large spikes are found Auto Save Datalogs is recommended so you have a timeline of the tune they re saved with time stamps as dlf files in the same folder as the bin file However saving manually can be best for referencing specific conditions especially when street tuning and comparing full throttle pulls or deceleration times o Live Auto Adjustment if a message appears that no values h
63. njectors while decelerating This is tricky as the part throttle operation might become jumpy if the ITB closed throttle vacuum isn t high enough An explanation of Alpha N http www bayareamotorsport com alphan html bi It s wise to export your maps constantly before making any Alpha N changes Datalog the atmospheric pressure and set the TPS MAP crossover just under the atmospheric pressure This may need to be changed later if the TPS needs more or less columns which will require you to export your maps and or start a new ROM In the new ROM rescale the MAP atmospheric value to a different column depending on which sensor you ll use most Col L 3 4 TPS TP6 IP TPS TP9 TP10 mbar 201 302 576 57 62 69 76 86 100 vacibst 18 527 15 557 7487 236 5o00 t4 109 174 282 330 385 423 484 558 602 14 116 1850 29s 350 412 450 484 551 703 16 120 189E 29 350 414 448 490 564 7o7 16 121 189E 305 358 421 458 492 570 1000 16 1430 198E 313 394 464 515 572 645 1250 22 1485 255E 35 430 502 563 611 681 Column cell values can be changed This ROM was tuned at 620mbar altitude reached at an average of 52 throttle Note the max MAP and min TPS column are outside that range as the table values should be spaced as evenly as possible 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G ey as IMPORTS f f J bi CROME v1 6 2 PRO DEALER USER MANUAL
64. ntinue increasing timing for all other cells until they also stop making power v You may want to back off all of the final ignition values just a little to account for fuel and temperature fluctuations that may occur in the real world Keep an ear out for detonation and check spark plugs on occasion just in case Plug 3 is the best to check since it often runs a tad leaner than others For boost columns it s best to use a MBC or EBC if available to control pressure Otherwise timing will have to be kept more conservative to account for error Only use full throttle if you can t otherwise reach the desired cell Full throttle is tuned as its own entity Some cells can be interpolated if the fuel values are not drastically different but by now most cells leading up to full throttle should be tuned With naturally aspirated motors some highly efficient intakes will see full MAP at partial throttle If you reach full MAP before full throttle tune full throttle first O The same process applies for increasing timing and overlaying dyno graphs at full throttle full boost If you find any ignition graph lines are crossing at any time be sure to smooth them out and reduce timing in the region slightly just to avoid interpolation errors and make sure temperatures haven t changed drastically that may have skewed the results See the VTEC tuning segment under Load Bearing Dyno for tuning VTEC engagement The nitrous meth injection process
65. nto the Registration window and select Register Register lt CROME gt Registration Info Company your company Serial ID C038896E5 061578 035354 0655334A7 XXXAAX Reg String izZe4BYwD9ZjtsitCazNZgGdIOdx3BksnothockL Was TrzZzPrKwHbVRyo uwSBm1l6xXmKU9sBoaw Z 8g8rvjEWADC3zmU1 cance 3 The Nokia USB Datalogging setup is rather involved and users should refer to the following URL for proper directions http forum pgmfi org viewtopic php t 1663 4 Moates Datalogging cable drivers are supported through FTDI and the latest package can be found here http www ftdichip com Drivers CDM CDM20814 WHQL Certified zi 5 After installing drivers right click on My Computer and select Properties from the menu a For XP machines Syatem Properties AX Automatic U dates Remote Lo General ComputerName Hardware Advanced System Restore 1 I Device Manager The Device Manager lists all the hardware devices installed 3 gt on your computer Use the Device Manager to change the properties of any device 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL b For Vista Windows 7 machines A Search Contro 7 Control Panel System and Security e System Pane Co Control Panel Home a i
66. o use this function be VERY cautious and patient and start with these settings Triggers Minimum Throttle 75 E Gear 3 Default Parameters Vehicle Weight 1300 ibs 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G TY be IMPORT pa j CROME v1 6 2 PRO DEALER USER MANUAL f Y continued Fourth gear is normally best but third can be used as long as the per gear offsets are correct If the graph produces a spike and throws off the scale make sure your TPS is calibrated and move the Minimum throttle to 100 and Set Tuner Logging Ranges to tighter specs to filter out tip in glitches Lambda Conversion Table Lambda Recording Conditions Range eE Z Throttle 76 02 Sensor Yoltage Lambda Value Lambda 0 96 _ PERE 0 00 0 746 jij Engine Speed 2200 11000 rpm teal oe Engine Load 800 1038 mbar 0 75 0 782 1 00 0 816 Water Temp 60 T 1 25 0 550 Gears 3 1 50 0 584 1 25 0 325 Lambda Offset Correction 2 00 0 959 995 0 986 Match readings on the WE display by adding and 250 1027 offset to the lambda readings 275 1 061 Li Offset Lambda E Note the TPS Range starts higher than the trigger minimum Lambda Range is focused closer to the full throttle target lambda engine speed is set above the tip in range engine load is focused to high throttle and only the target Dyno gear is logged to reduce the file size
67. oolant Temperature 179 60 F Air Fuel Ratio A244 00 VTEC OFF CEL OFF Playback Duration 00 02 13 349 Measured 2600 to 3000 RPM o Notice in this graph the pull from 2600 to 3000 took longer after the ignition advance This means we ve advanced too far which could lead to detonation This is just an example photo notice the throttle and MAP don t match up most ignition O changes won t cause this drastic of a time change Many times you might only see a 00 00 00 500 change in duration bi If durations don t improve significantly back off timing about 1 and toggle off the cell Refer to Chapter 5 9 f for graphing tips o Many of these steps can be combined with practice and larger areas of the table can be adjusted instead of one column 6 Temperature Tuning this should be done BEFORE tuning the engine IAT and ECT will change frequently during a tune so it s important that these are calibrated correctly or outputs will constantly skew Some do IAT then ECT some to ECT then IAT Find your own happy place a ECT coolant temp bi Disable IAT O2 BARO and IACV for P30 base set all IAT Fuel Comp to 1 00 and jump the SCS service connector Disconnect the radiator fan and IACV and pin the TPS open at about 5 to achieve around 1500 RPM o Start the engine cold hose down or ice the engine if desired Keep the hood open with a strong fan on it to steady the intake temperature o Begin datalogg
68. owever detonation and engine damage are still risks Refer to the Fuel Combustion Optimization guide for power leaning and consider a different spark plug heat range if fouling occurs o Water Meth injection is just an octane booster to curb detonation but it also cools the intake to condense oxygen Power leaning can yield significant gains however methanol will make power from the cooling effect alone For the entry level water meth tuner simply re tune the fuel tables to target AFRs as if the methanol injection wasn t there For common applications it s not necessary to RE tune ignition but extra precautions are at the tuner s discretion as always Since methanol makes power leaning and ignition advance safer longer combustion duration lambda can be leaned out anywhere from 3 to 15 with proper tuning refer to the Fuel Combustion Optimization guide for power leaning with methanol Make sure to maintain the same brand and concentration of water methanol for your injection system Visit this link for more information on where and what to use http www alcoholinjectionsystems com a48 What Type Of Fluids Can Il Use With M Methanol Injection System article _info html f Deceleration Tuning optional Some dyno machines read negative force or drag although beneficial it can be done without measurement There isn t one way to achieve optimal deceleration but here are some hints o The basic idea is to cut fuel without
69. p in mind the non Gold ROM Fuel Multiplier plugin is disabled and the Advanced Tables have been migrated and consolidated into this feature Next select the Advanced Fuel Corrections tab button E SJ Fuel Corrections Injector Sizing Additional Adjustments M l i IAT Corrections IAT Correction in 1 eee increments ai i Temp F 9 284 4 ECT Corrections 4 Individual Cylinder Correction a 4 Battery Offset E Ignition Corrections er and to ry Idle Open Loop ECT Correction sol aie batid siii Fal Rev Limits Temp F 22 71 254 a VTEC ow sss E es sa NNGe Boost Settings righ Looe EMSS ES NNT ies 15 oo San aie trol Close Loop ECT Correction a 1 paina increments ac ee mere Temp F 22 160 254 Low Load KS Diagnostic Trouble Codes igh Load a i TPS Calibration General Fuel Corrections Advanced Fuel Corrections F MAP Calibration Individual Fuel Correction 1 sth increments sq Table Properties Cylinders 1 Ga Gear Ratios Correction a ET AI Misc Battery Offset Values in microseconds 2 Voltage W 6 3 Latency us 2684 1237 o 558 Starting Voltage Running Voltage Live Auto Adjustmente P ay Live Tuning ty Smart Tracking Base Cromedu 0 43 Final Multiplier In all the Options tables in the CromeAu base ROM the advanced tables highlight the active cells in purple to show live data As mentioned in the illustration all of these cells can be changed in real time b
70. pass around the throttle body This should only be adjusted if the engine dies during deceleration or when idling especially with aggressive cams or individual throttle bodies 4 VTEC dictates when the VTEC solenoid is activated and the secondary tables are used IAB is only enabled with the P72 and P13 ROM specifically for use with P72 and P13 ECUs in conjunction with either the B18C1 GSR motor or the H22A motor Tuning this feature will be covered in later chapters 5 Speed Limiter uses fuel cut to limit speed in the same manner as rev limiting This can be a beneficial feature for emissions or security when using dual chips 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G ma IMPORTS s A CROME v1 6 2 PRO DEALER USER MANUAL 10 11 12 13 14 15 16 17 18 Launch Control sets a rev limiter that is only active between 0 8mph to assist in smooth launching and building boost with turbo applications It can only be perfected through tuning trial Full Throttle Shift engages a rev limit at 100 throttle while the clutch is depressed to rev match the engine for the next gear to save time over heel and toe shifting At redline determine at what RPM the next gear picks up and set the value See Attachment 2 for help Be advised this feature in standard ROMs only works if the clutch button is wired to the A C circuit pin B5 on
71. ptions are provided based on common known working combinations used in the tuning industry 1 CROME Pro single use License 149 with Moates Ostrich emulator 175 2 CROME Dealer License 450 with Moates Ostrich or Burn2 85 3 Unfortunately the Moates Demon RTP unit should not be considered for use with CROME 1 6 2 as it is known to have connection issues with most laptops Some tuners are able to make this combination work and theoretically it is ideal however the success rate is negligible Hulog HondaLog USB adapter AEM UEGO Innovate LC 1 or PLX wideband O2 sensor controller Windows XP laptop with at least 2 USB ports 1GB RAM Tip HP laptops get very hot which can be uncomfortable for tuning It is not recommended to use an HP laptop to operate CROME 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David SIRAVIT L IMPORT P AN f i s gt CROME v1 6 2 PRO DEALER USER MANUAL CHAPTER 2 SETUP AND CONFIGURATION 1 Download the latest version of CROME at www tunewithCROME com and opt to open CROME after installing the welcome screen should give an option to select Register If not navigate the menu bar to Help Register 2 Inthe Registration window select Get Reg String at the bottom which directs you to the CROME website to complete your registration Once you ve purchased and acquired your Reg String copy and paste it i
72. r output can be used as long as event conditions are reasonable bi For wet nitrous systems receiving an outside fuel source fuel cells can be set to O and will likely need to be negative since wet systems overcompensate If this is the case system events do not support negative values so a separate ROM will be required o Use larger injectors for dry nitrous systems take the full throttle fuel value for a given cell and add 50 more fuel It s highly advised against using an FMU hack to raise fuel pressure for these systems as it can cause fuel system failure and consequently a blown engine 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David Di DE k G TY IMPORTS A CROME v1 6 2 PRO DEALER USER MANUAL Set a target AFR of 11 1 on the Target Lambda table Perform complete full throttle pulls and copy the percentage difference in the fuel value over to the corresponding fuel cell in the system event i e if an existing fuel value is 1300uUs and the differential F12 is 8 79 leaner than the target multiply 1300 by 0 0879 to find the product of 114 27us Fa System Events Multiply Lambda F12 percentage by existing fuel value F9 and add the product to the fuel 2 cell in the system event 0 0879 x to convert percentage for multiplication move the decimal left two places o Nitrous is a cold combustion so it can be more powerful when lean H
73. racking Instead of using PgUp to increase timing use PgDn in the F11 table to reduce fuel for the cell until it stops making power then PgUp and toggle off the cell If the cell doesn t gain any power by leaning add fuel instead and monitor for changes Multi cell tuning even by column can be effective for this tuning method For inertia dynos disable Smart Tracking and follow the ignition tuning procedure but tuning fuel maps instead of course v Pay close attention to knock and check spark plugs at the end of a WOT pull o When finished you may want to adjust your Target AFR tables to the new values especially if using a permanent active wideband for Emissions Control d VTEC Tuning comes next This process is the same for any dyno type o Change the VTEC point to 7k make a complete full throttle pull o Change the VTEC point to 1k below stock and make another complete full throttle pull o Compare the two graphs and set the high load VTEC engagement point where the torque curves intersect and copy the same value to the low load 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David ae ke G ZIT IMPORTS a f CROME v1 6 2 PRO DEALER USER MANUAL o You can optionally do this same process to gain Low Load is always higher 200 to a separate low load crossover at partial throttle 800 RPM offset is common or for two boost stages as long as
74. rottle Air Fuel Ratio Speed In Mph v Boost In PSI Temp In Fahrenheit Air Temperature Coolant Temperature 135 00 F O2 Voltage 1 94 W air Ful gia cry ae lates ace ee ee Battery Voltage 13 75 W CEL OFF Playback Duration 00 00 39 567 Air Fuel Ratio 12 60 rs 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David bar e IMPORTS A j CROME v1 6 2 PRO DEALER USER MANUAL 4 f j 4 Datalog Telemetry D is the graphing function dealer With an open datalog file pressing D will change the screen to the graphs INJ DC me RPM Data Type Value 120 Engine Speed 2506 rpm 10000 Vehicle Speed 37 2 Mph Gear p00 Manifold Pressure 813 mbar Boost 0 0 psi Sar Throttle Position 100 Injector Duration 4 12 ms Duty Cycle 9 4000 Ignition Advance 21 75 Knock Retard NONE 2000 a Air Temperature 122 72 F h Coolant Temperature 185 00 F f Pi lt 0 a 02 Voltage 1 94 V Air Fuel Ratio 12 60 VTEC OFF Battery Voltage 13 75 V CEL OFF Playback Duration 00 00 39 567 4 00 00 38 00 00 40 00 00 42 00 00 44 00 00 46 00 00 48 00 00 50 oe The data can be selected for each graph through Settings Data Graphs see chapter 5 9 f a The vertical line in the graph signifies the playback position which can be adjusted from the bar at the bottom of the Live Data Display to the right of the graphs b To stre
75. round on the other side of the switch but D2 requires a 12v input 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David CROME v1 6 2 PRO DEALER USER MANUAL o Boost Generator AKA Anti lag in Crome Gold will be covered more in the tuning chapter but 20 Ignition Retard is a safe starting point along with the fuel value in the same column as the 1 gear target boost level jwactbst 4 45 26s 094 02 37 60 89 176 andet Boost Generator 4s96 502 560 616 663 818 969 1122 1269 i S00 540 603 657 702 866 1026 Pomon tar eoon degrees 000 554 618 674 705 870 1031 Fustenscnment 192 microseconas 7000 569 62 679 T14 881 1045 i 12 Adjust VTEC carefully except for VTEC E no VTEC should ever engage below 4 000 RPM at the absolute minimum without risking engine damage Without tuning it s futile to adjust this from stock unless an aftermarket camshaft recommends a specific setting The VTEC Pressure Switch and Solenoid Feedback in Crome Gold can randomly glitch so they should be disabled Refer to Chapter 5 for details on VTEC Parameters IAB is tricky with Gold ROMs be sure to set this up ahead of tuning as it doesn t seem to like being adjusted while the engine is on If a glitch causes a solid CEL or bogging try inverting the output first or disable it and set up a custom System Event instead Enable Event Always On Actions Conditions
76. rpolates values major differences with neighboring cells will throw off readings Set the dyno limit to the next RPM increment in your ROM that did not log any data rinse and repeat up to 6k For boosted setups you ll reach more columns as you progress through RPMs your turbo may spool all the way up to your target boost level at lower speeds on this dyno even if you ll never reach those cells in the real world Make a complete full throttle pull from idle to 7k just to check the power curve for errors 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G r 4 IMPORTS T f CROME v1 6 2 PRO DEALER USER MANUAL 1500 1750 1 62 148 0 32 1 28 0 60 0 01 0 28 2000 0 45 0 55 0 19 1 73 0 67 0 13 0 90 1 99 1 17 0 01 2248 0 15 0 17 1 66 0 17 0 17 2500 0 27 0 01 0 14 0 36 0 39 3000 0 62 0 30 0 71 049 3188 0 50 0 25 0 31 3500 0 59 0 38 4000 0 62 5000 008 6000 0 44 7000 7936 Notice after logging two WOT wide open throttle pulls row 4496 is still much leaner than it should be In this case we would check graph Low Cam Fuel x 0 533 1818 mbar See the MAP line below the purple rectangle which is where the ECU gets the value from dips much lower If Auto Adjust doesn t fix this manually adjust the cells and toggle them off If problems persist try inserting another MAP column to reduce interpolation e
77. rror or use a new ROM Otherwise the cause is likely mechanical Low Cam Fuel x 0 576 mbar The large gap between lines may be because AFRs are drastically different between columns If bucking or hesitation occurs from this try inserting another MAP column between gaps re scaling columns or just being more gradual with target AFRs 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David O CROME v1 6 2 PRO DEALER USER MANUAL Enable VTEC and set it to either 3500 RPM or around 1000 RPM lower than stock Again repeat the entire process from the low cam tune Pay attention to engine noises throughout the entire tuning process particularly pinging and knocking but also whining and other chatter Detonation sounds a lot like the engine sucked up ball bearings or a sharp repetitive snapping sound If any of this exists immediately stop the process and check spark plugs for signs of detonation pre ignition or leaning and consider reducing timing adding fuel or finding a more suitable spark plug heat range b Ignition Tuning comes next a Compare the fuel curve to the ignition graphs It s a good practice to make slight adjustments in timing maps before continuing to avoid drastic timing shifts between cells and prevent potential damage To view only graph lines below atmosphere hit F3 a second time and the graph will hide anything above the Atmospheric Press
78. rs need to be richer If you see no improvement start troubleshooting other problems or adjust the fuel map at idle and start the process again Connect the alternator and run the test again but tune the active purple cell should be around 14v in the advanced corrections tab until a stoich idle AFR is met The injectors should now be tuned if the fuel is skewed on cranking or startup simply adjust the cranking and post startup corrections 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G 4 r D Fa eo IMPORTS S CROME v1 6 2 PRO DEALER USER MANUAL ATTACHMENT 2 FULL THROTTLE SHIFT FTS TUNING In order for this to work correctly the clutch depress switch must be used not the clutch start switch The difference is the clutch start button is only activated when the clutch is all the way down and the depress button is activated as soon as the clutch lever leaves the stopper If your car does not have a clutch depress switch make sure you order the correct switch In most Hondas it has a white plug not yellow You can cut off the plug and bridge the clutch start wires and use it for the clutch depress to make installation easier On some models you might need to razor off the raised edges on the sides of the plug to get a proper fitment The only input for FTS on standard ROMS is one wire to B5 ACS and one wire to ground On Gold ROMs B5 is still idea
79. s 26r1 f No Change f No Change C No Change 3059 36 3490 34 f Default f Default f Default 3921 35 C Even Distribution C Even Distribution f Even Distribution 38 f Incremental f Incremental f Incremental 4782 34 5213 30 Starting At 1 OU mbar Starting At 500 pm Starting At 500 pm 5644 at Increment By 1 1 g mbar remeri By 450 Increment By 430 ror 6075 34 6506 32 a 6936 34 7367 44 7798 44 a r r aa araar aa aeree 8229 3 e o 389 460 495 531 559 722 878 K 10986 Last RPM Row cannot be changed You can toggle the last row if it s unuseable Import tables after all corrections have been made and check graphs for errors g Inthe event a row or column shows little change over its neighbor it can simply be omitted in order to keep consistently spaced cell interpolations The best method is to first export tables then shift cells up or to the left by renaming them mbar 100 215 338 569 569 692 807 923 1046 1161 vacibst 26 89 23 50 49 98 4646 13 08 9 45 6or 265 517 A3 4 383 413 459 504 948 25 32 385 415 462 507 1379 1810 2240 3059 36 3490 Column 4 inherits the MAF value of 5 and so forth RPM range 2240 can also be omitted 5 Tools Notes often used for branding a file but can also be used during tuning as a notepad The data is written at the end of the bin which may cause checksum errors or a solid CEL Be sure the checksum is di
80. s open The secondary tables F6 F8 are used for Vtec nitrous methanol etc to control fuel and timing under different conditions that are not consistent and require an output to be engaged This will be explained more later on Aamo uenas M a a a 8 mbar mbar uaj 288 403 a ie ae i 2 3 the percentage of time in ane stroke cycle that the injector is open Over o0 the accuracy of fuel O e delivery is jeopardized Duty cycle determines if your injectors can handle the application s power requirements and can also explain fuel cut If the duty cycle of your basemap which should always be richer than necessary exceeds 80 invest in larger fuel injectors and or other fuel system components to increase flow and reduce the pulse duration 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David gt G IMPORTS j CROME v1 6 2 PRO DEALER USER MANUAL fies Tables 4 Graphs gt Options FA a ah Gh lonition Fuel Tables mbar 1144 288 403 519 634 750 vagbst 26 48 24 35 14 55 11 16 7 75 500 16 50 16 50 16 50 11 75 6 9 the amount of time in 602 16 50 16 50 16 50 1225 975 advance that the spark is 703 16 50 16 50 16 50 1275 10 75 triggered before the piston 797 1650 16 50 16 50 1375 1175 Makes full compression 4000 2175 2475 2175 1825 15 50 ae yan nerd 1250 29 00 29 00 2475 20 25 18 00 tho a ences 14500 341 75 34 75 26
81. sabled 6 Tools Real Time Programming launches the RTP toolbar which can also be used for burning chips The R hotkey is a very handy feature 7 Tools Tuner if this doesn t appear at the bottom of the window or as an icon in the toolbar then the registration was not done properly 8 Tools Command for software development purposes not be covered in this manual 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G he amp gt mA a IMPORTS A A 4 9 CROME v1 6 2 PRO DEALER USER MANUAL File Settings All general datalogging connection and software options will be located here Familiarize yourself with this button as you will likely use it every day a General o Selection Adjustments when using PgUp and PgDn these are the increments used to adjust fuel and timing maps If you find your fuel values change too dramatically or not quickly enough try changing these to suit your needs o Table Adjustments strictly for use with smoothing tools Hf Usually a rougher setting is ideal however if graph lines tend to stay crossed or appear very drastic consider lowering the threshold or smoothing more than once o Units customize depending on what you re used to or what works best for the car and modifications Uncheck Air Fuel Ratio to cross reference the Target Lambda table F10 with Set
82. stand how to navigate this toolbar CTRL T Open the Tuner Toolbar if it s not always up which will show at the bottom of the screen PP ea LF Live Tuning r ty Smart Tracking a ar Via a Live Auto Adjustments a Auko Adiust Maps a Clear Recordings There are a set of icons for opening saving and clearing datalogs These will all be used frequently for most tuners but unfortunately there are no hotkeys for them Some buttons in the toolbar have a drop down arrow for more options b Live Tuning has a Record Mode option that s on by default but allows you to datalog without recording This stops the prompt to save the datalog when clearing closing or opening another file For common tuning practices it s better to leave this on c Smart Tracking highlights the live cells and actively switches high low cam tables to always keep the live data in view 3188 ILVE CELL S ARE HIGHLIGHTED PURPLE Turn this off when making manual adjustments or it will only adjust active cells There is a benefit to adjusting during smart tracking but it will be explained in the tuning section Select the drop down to choose more cells to track o Quad Cell logs the four closest cells to the live data This is very helpful for initial tuning however it should be turned off later to nail down fuel maps more accurately Single Row highlights an entire RPM row Useful for ignition tuning Single Column works great for initial tuning o
83. stments every time there s enough data above the threshold see chapter 5 9 e to adjust threshold it will automatically filter adjust and smooth whatever data points have been logged without confirmation then clear the tables Only try this function after you re more familiar with the next function It can be counterproductive at times especially if smoothing is set high i Auto Adjust Maps is a frequent function for fuel tuning This allows a user to wait until their own desired amount of data is logged before adjusting the maps You may benefit from using Auto Fill before clicking Auto Adjust Always check the graphs F3 after doing this There is a drop down for this that allows you to auto adjust rows or columns by increment you may or may not ever find this useful j Clear Recordings doesn t clear all data it only clears off the lambda tables in case you re manually adjusting cells or only monitoring AFRs during ignition changes This way the entire log can still be saved as one file which is handy for comparing graph differences The data stream will still continue in the timeline and show up in graphs If you want to save a different file or are using Dyno Tools be sure to use the Clear Datalogger icon to start a completely clean file 3 The Live Data Display appears on the right when the ignition key is on and Live Tuning T is enabled Be sure the datalogging cable is properly connected and
84. t the table is backwards from the graph orientation here If having trouble getting VTEC to switch properly try lowering the mbar values on the lower RPM range This feature takes practice it s recommended to start with values just above the O2 Closed Loop cutoff point ECT ign Correction Retard 1 high load ignition dampening for overheating Only modify this if there is significant power loss engine knock during heat soak m ECT ign Correction Retard 2 do not change these values n ECT ign Correction Advance 1 high load ignition advance colder combustion usually benefits from higher advance Tune this as you would the ignition tables starting from stone cold to heat soaked o ECT ign Correction Advance 2 low load ignition advance same process Retard if IAT lt b5h the hexadecimal translation of b5h is 181 it is speculated this corresponds to IAT values less than 181 degrees F and accounts for common air density variations Only in very rare situations are these numbers altered q IAT ign correction When intake charges get too hot ignition is retarded to avoid detonation It s a safety net intake charges should never remain this hot r Injector Battery Offset stock When using injectors other than stock 240cc high impedance saturated Honda injectors this usually requires attention Injector Battery Offset Stock Batt volts 19 5 14 9 13 9 12 8 11 7 10 6 6 3 Inj rns 0 32 0 33 O47 0 62 1
85. tch out or shrink down the timeline click on the graph and drag up or down The longer the timeline is stretched out the more precise the playback position is depending on how high the sample rate is c Line colors are set by the program to give the most contrast between selections If you have trouble telling the difference between two line colors go back to Settings and add two ata time The order in which they re added to the graph changes their color If you add more than 5 lines some of the scales on the left will be hidden d Not all data is viewable with all ECUs or ROM bases This is a bug in the datalog protocol however other protocols work differently Go to Settings Tuner Comm Serial Protocol and try a different setting 5 Tuning Tables These are used during datalogging to assess and preset fuel and timing values and are readily accessible in the toolbar a Rrarcet Lambda F10 sets the desired AFR lambda target for each cell on the fuel maps os A IE Ignition Fuel Tables Q Injector Duty Cycle A A 2 zi 5 6 7 a 9 B10 B11 B12 B13 B14 634 750 s865 923 981 4039 1161 4284 1407 1530 11 167 7 75 4367 265 oo O4 21 39 57 75 1470 1436 1436 1425 1404 14 04 AFR Air Fuel Ratio or Lambda 1470 1436 1436 1425 1404 14 04values desired for each fuel cell 1470 1436 1436 1425 14 04 14 94 hese are adjustable 1470 1436 1436 1425 1404 14 04 7 9Up PgDn although are 12 70 1a6 tae aoa nerana 2 Y Pr
86. the ECU If the FTS rev limiter is always engaged see troubleshooting Shift Light provides a reminder to upshift that s sent to the Check Engine Light in the dash cluster when nearing the end of peak power Depending on gearing speed and reflex this may need to be set lower than the actual peak power range Boost Limit provides a fuel cut for boost protection over a certain value Usually used to identify the ROM or MAP sensor s highest threshold before the values exceed measurable limits This is NOT to be used as an alternative to a wastegate to stabilize boost Sensors many applications and or ECUs do not have all available sensors that the P30 offers so disabling unchecking those removes the Check Engine Light amp resulting trouble code and removes the input data from the ECU s calculations Especially for tuning it is ideal to remove variables such as the O2 which skews wideband readings the Barometer which skews the MAP sensor and the ELD which shifts the injector pulse offset gt Other selections in the Plugins Enhancements tree include Rev Tools Extends the RPM table range to 11 000 RPM for high revving motors Edit Gear Correction obsolete can now be changed in Advanced Tables Edit Gear Table same as above designed by a different author Step Ignition Retard applies reduced timing to specific ranges of boost to the tables The default settings are good for most mid power applications
87. the factors for finding a percentage over stock Overbore will yield a lower power curve so a bit more fuel should be added to lower RPM rows over 600mbar e Quench Zone if the head s combustion quench zone is built out higher compression results which will demand richer AFRs at high load This is hard to estimate but start with adding 5 fuel over 600mbar after adjusting the remainder of the tables f Milled surfaces any time a deck is milled either for block inserts or warping compression will increase slightly Most often it won t be enough to warrant fuel changes _GravityImports __ ee ee and Skunk race cams A a m I I I I I I I I r 1 eee ee ee ee ee I I I I I I I I I I I I I I I ee I I l l I I l I I l I I I I I ference and a _ BB 19 Adjusting ignition timing tables THIS IS EXTREMELY DANGEROUS PROCEED WITH CAUTION When in doubt reduce timing to the lowest operable value and increase in small increments More volatile combustion usually burns faster and hotter which increases with smaller combustion spaces and or larger concentrations of oxygen So avoiding detonation is priority 1 for a basemap and avoiding power loss is 2 Choose the right spark plug heat range for your application to help prevent detonation a Intake Modifications these can be hard to gauge but for every increase in fuel there is typically a
88. this is your first tune this is not the best place to start But it s often said that the best tuner stands on the biggest pile of broken parts so proceed at your own budget a Throttle calibration and idle adjustment O Each throttle plate has to be adjusted individually to obtain equal airflow to each port which starts at closed throttle A custom TPS voltage range is almost always needed so calibrate this first either through the ITB Tools plugin P30 or in Options TPS Calibration for Gold files You may want to get the throttles as close to equal before you install the manifold unless the manufacturer suggests otherwise You ll have to get creative with how to measure the throttle positions but one way is by slipping feelers under the throttle openings This doesn t guarantee the vacuum will match but it helps with makeshift ITBs Disable IACV and set the target idle to 1150 Many ITBs can t idle below that anyway If the engine won t stay running adjust all the throttles out slightly Make sure to achieve stoich AFR and be sure the ignition isn t higher or lower than the table value 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David SJRAVITY Lia he IMPORT gt j CROME v1 6 2 PRO DEALER USER MANUAL f A o Use amonometer or vacuum gauge if each runner doesn t have its own vacuum side nipple invest in having some installed If your IT
89. throttle bodies and certain fuel conditions If this is the case only trial and error will stabilize idle Also see chapter 4 19 for information on idle cut For stalling and bogging trouble with A C idle in P30 ROMs note the difference in MAP pressure with the A C switch engaged and raise fuel and timing in that region For Gold ROMs go to Options System Events and start with the following parameters fuel in this instance is for stock injectors At O RPM refer to the fuel table value and add 60 more fuel and 30 at 2000 Enable with BS ACS AC Switch Invert Input Conditions Actions Conditions Actions No Output Exclusions diii Map Adjustmetns lf Disable on CEL lf Disable on Standstill RPM Ign Fuel ps Event Conditions Minimum Maximum Engine Speed 500 i 1400 rpm 5 Engine Load 59 1fe2 mbar o Vehicle Speed 159 mph Throttle Position j 12 112 ka Intake Temp 22 284 F Coolant Temp 22 284 F 2 Chassis Dynamometer Procedures o It s highly recommended to read an instructional manual on the dyno you re using or observe a tune being conducted on it if possible before proceeding This guide focuses mostly on the ROM editing procedure since there are too many variations of machines o Secure the vehicle and install dyno instruments input wheel size amp car parameters if applicable set desired graph standards and smoothing o Dyno runs are normally done at a 1 1 gear ra
90. tings Tuner Logging Lambda Recording Range MAP reading Be sure the correct MAP sensor is selected Stoichiometric value sets the scale for target lambda It s typically 14 7 for pump gas or 9 76 for E85 Race fuel and methanol water injection lambdas vary but are usually on the leaner side b Options o Rev Limits dictates the point where the fuel cut from a rev limit will turn off and revert back to the tables Default settings are usually best however if you re having trouble with boost generating you might modify this setting o VTEC only relevant when tuning deceleration on a load bearing dyno or when jerking or surging exists at the crossover Default is usually best c Real Time Programming and Tuner Comm refer to Chapter 2 for initial setup Tuner Logging refer to Chapter 7 for initial tuning setup Tuner o Auto Adjustment Conditions designates a threshold for fuel table adjustments to ignore small changes and prevent overcorrection They should be changed periodically depending on the engine but these settings work well for most engines Auto Adiustment Conditions Live Auto Adjustment Minimum Fuel Adjustment 2 00 Z Mininum Sample Count E Masinnum Fuel Adjustment i 300 amp blinimum Interval i SECS W Apple Data Filtering Sampling Rate Pronty lw Apply cmar Fill Higher T n E n Higher Refresh m Sampling Elea Meee ee ee ret ae ATT He es ee Vee Oe ee Fate W Clear Recordings After Tu
91. tio from the lowest possible RPM to the highest which for most Hondas is 4 gear For the purpose of this guide all runs should be done at a 1 1 gear o Some dynos use a drag coefficient by measuring neutral deceleration so you may need to perform this first 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David 3 3 f gt G gt IMPORT f CROME v1 6 2 PRO DEALER USER MANUAL f A 3 Load Bearing Dyno There are two typical types of dynos load bearing and inertia The main difference is load bearing allows you to hold a specific RPM so we will cover this method first E KEEP NOTES Write down changes as you make them Windows7 has a Sticky Notes feature that s easy to tab to or you can use any method you prefer bi Note and Save icons will appear throughout the tuning guide to hint when you should make notes and or save a copy Alt S will quick save for backup a Fuel Tuning always comes first v E Disable VTEC or set it to 7000 RPM Most cams won t engage higher than 6k but some types of race cams bend that rule Set the dyno limit to the exact RPM value of the first achievable row above idle i e 1000 RPM Slowly open the throttle until all cells in that row have enough lambda data that they won t be filtered out It s a good practice to select Auto Adjust Maps after each row is completed but Live Auto Adjustments can also be used here
92. tubing e Either firearm airplane grade protective earmuffs or a quality stethoscope w comfortable earpieces e Hose clamps and a box of assorted hose nipples from an auto parts store e Hammer and drill with a 3 8 bit e Epoxy or other strong glue e 2threaded vacuum connectors with a male nipple as seen on a turbo wastegate or any variety of intake vacuum parts only needed if using firearm earmuffs Procedure 1 Crush one end of the copper tubing until it is completely flat or purchase a copper crimp style electrical ground wire terminal from a hardware shop if you d rather solder that to the tubing Drill a 3 8 hole in the crushed side 3 Use a reducer from the copper tubing to the rubber hose or cut a V out of the tubing in order to taper it into the hose and secure it with clamps and or epoxy 4 Remove the diaphragm from the stethoscope and use the appropriate sized nipple to bond the stethoscope hose to the fuel hose Done 5 If using earmuffs hollow out any internal padding in the muffs and drill a hole near the bottom of the muffs to match the outer diameter of the threaded vacuum connectors You can choose to only route it to one ear or use a y nipple to split the hose into both which is recommended Even though they re threaded glue them in place anyway 6 Use a bolt to secure the copper end away from the intake or exhaust manifolds to reduce acoustic noise near the bottom of the head or the top of the block pref
93. ure value set in General Settings Adjust each graph line separately and make sure you re comparing the correct line Where fuel increases there will normally be a drop in timing If the fuel curve slumps or flat lines add a gradual ignition advance through it High Cam Ignition High Cam Fuel x 0 774 1038 mbar g O 1038 mbar Disable VTEC or set to 7000 RPM again and enable Live Auto Adjustments if desired it s a good habit to keep AFRs consistent as they can change with timing adjustments Set the dyno rev limit to the same first RPM row from the fuel tuning session select the MAP data stream for the active datalog display and select the low cam ignition map F5 Smart Tracking can come in handy here for actively changing timing values as you drive but be careful especially if using multi cell tracking The dyno software should provide a live display of the active force against the machine in some quantity Newton Watt Ibs etc refer to the manual on how to access this test If your dyno does not provide live force data it s best to follow inertia dyno procedures 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David e CY IMPORTS Pa j CROME v1 6 2 PRO DEALER USER MANUAL lt a f A A Hold the active MAP cell and increase Low Cam Ignition the timing value until the force stops es rising then back off a half degree If the fi
94. wo 2o Air Temperature Compensation Tem F 2 a s 137 284 Duty 42 as oo osii1z Boost Control hode Yariable Primary a Boost Gear 5 Switch to Secondary Targets Using Troe BSa enes eg eveomcresweo x can Ai AAA nennou Secondary Target Boost Gear 2 4 Target 440 180 200 220 220 Gain 410 4100 440 41 41 Choose an output Frequency varies depending on the circuit and EBC this shouldn t need to be over 20Hz If no boost or incorrect boost results invert the output Only adjust Solenoid Performance if the EBC manual has provided a table Air Temperature Compensation is better left alone it seems to be unstable Always start with a Fixed Boost Control Mode Select a Duty Cycle that matches your target psi i e 55 11psi Integral Gain is basically a buffer that the ECU uses before taking control If the wastegate seems lazy try changing this Variable Boost Control is also known as Per Gear Boost Control which is used to help in launching for high power applications but can also be used for emissions or fuel economy Secondary Targets can be a useful switch option for any variety of reasons Burnouts stepped boost or nitrous meth injection for racing road to race switching etc Emissions Control in Gold ROMs can be customized for permanent wideband O2 sensors or for skewing a stock O2 Do NOT enable this during tuning If a wideband sensor is used disable the O2 Heater Feedback O For lean protection
95. y clicking and typing or double clicking and pressing enter Be sure to save a copy of your ROM if Dealer edition purchased before making changes here Battery Offsets should automatically change if a specific injector was selected from the General Fuel Corrections page and rarely need adjustment Otherwise change offset values to 100 and continue to move up in 50microsecond increments for all surrounding cells until startup fuel delivery improves 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David G he amp gt mA a IMPORTS A A 4 CROME v1 6 2 PRO DEALER USER MANUAL Tools Boost Table Adjustments B For any ROM using extended columns for boost this tool is very useful for creating basemaps Some argue that step ignition retard is more accurate P30 only although the fuel multiplier in this tool is functional if used correctly Before using this tool be sure to either add BoostTools or see the Table Properties section under the CROME Gold CromeAu Options guide to add boost columns a Ignition Table Adjustments If you choose to use this model understand that ignition is ramped down gradually rather than in stepped ranges which will have a different effect on performance It s often much safer but requires a bit more tuning to reach peak output In most cases 0 75 is sufficient b Fuel Table Adjustments turbochar
96. you ll need to reference another ROM with similar fuel compression and displacement Refer back to Chapter 5 for complete details on editing Advanced Tables or Chapter 4 for any ROM editing subjects that are not explicitly covered in this section 2011 GravityLabs Inc CROME Cui s ROM Editor v1 6 2 User Manual revision 2 0 March 10 2012 by Miles David Ey G Y IMPORTS oe CROME v1 6 2 PRO DEALER USER MANUAL A yf Closed Loop Control T PS vsRPM I4T Fuel Compensation ECT Fuel Compensation ECT Fuel Compensation Closed Loop Control TPSvsRPM IAT Fuel Compensation Ec T Fuel Compensation Temp F 22 0 27 24 8 60 3 eels 170 6 284 0 ECT Fuel Compensation Temp F 22 0 11 7 27 24 8 96 4 159 ECT Fuel Idle Compensation 1 41 1 11 1 0 1 03 1 02 1 00 ECT Fuel Idle Compensation 1 40 1 40 1 30 1 25 1 16 10 Post Fuel Compensation Open Loop i 1 Oc M Post Fuel Compensation Dpen Loop Crank Fuel Compensation Max Bounds 1 59 1 47 1 45 1 44 1 19 1 02 1 00 Crank Fuel Compensation Max Bounds 1 70 1 70 1 48 1 42 1 35 1 28 1 2 Idle Speed vs ECT Closed Loop 1 00 1 00 1 00 1 00 1 00 1 00 1 00 Idle Speed vs ECT Closed Loop 1 00 1 00 1 00 1 00 1 00 1 00 1 0 Idle Speed moving vs ECT Idle Speed moving vs ECT Individual Cylinder Trim Auto Tranny 1 59 1 47 1 45 1 09 1 05 1 00 1 00 fdividusl Cinder Trim Auto Tranny 1 20 1 20 1 07 1 00 1 00 1 00 1 0 t VTEC Switchover 0016fh 2 00 1 80 1 69 1 50 1

An intermediate guide to operation of the latest - Honda

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