4 - VThunder
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1. 1 long led blink negative value followed by 3 short blinks value 3 Set switch B back to 0 Ne Bp 1 800 976 1066 www vthunder com FAX 901 366 1807 ce RES TABLE 2 Mode 2 Switch Functions Also See Table 3 Switch Settings and Value SWITCH A POSITION DESCRIPTION RANGE 0 NORMAL RUN Switch A should always be returned here after reading or programming 1 SINGLE DUAL FIRE MODE 1 Single Fire 2 Dual Fire Single Fire mode fires each cylinder independently and requires 1 coil cylinder Dual Fire mode fires both cylinders together using a dual output coil Factory 2 MAIN REV LIMIT 4000 0 6000 F 8000mm Maximum rpm before ignition cutoff Factory setting 6000rpm 3 MIN ADVANCE 0 109 F 252 Idle spark advance Factory setting 152 4 MAX ADVANCE 0 309 F 452 Total spark advance Factory setting 352 5 CURVE SHAPE 0 slowest F fastest Shape of spark curve between minimum and maximum advance Factory setting 0 6 VOES RETARD 0 02 F 15 Amount of spark retard below 5 of manifold vacuum with V 0 E S Factory setting 5 7 NITROUS ARMING RPM 0 0RPM F 8000RPM RPM setting for nitrous to enable Factory setting 4 4000 RPM 8 REAR CYL TIMING F retard 152 0 no correction F advance 152 Offset correction for rear cylinder Factory setting 0 9 START UP IGNITION DELAY O nodelay 5 5 revolutions Number of engine revolutions before ignition enabled Us2. 45 FASTEST 15 8250 15 ADV 1024 1024 15 ADV 7936 15 7 5 _ INSTRUCTIONS MODE 3 Operation in mode 3 allows the ultimate in programmability With our optional PC interface module and ProFire software a desktop or laptop computer may be used to program totally independent front and rear timing curves advanced acceleration modes etc Real time programming makes dyno testing faster cheaper and more efficient For Mode 3 programming settings and options you must purchase the V Thunder interface and ProFire Software Windows 95 NT 3 1 compatible part VTPM2100 STATIC TIMING PROCEDURE 1 Be sure the ignition switch is in the OFF position 2 Remove front amp rear cylinder spark plugs 3 Ground both spark plug wires to the frame or motor to protect the Controller and prevent acci dental start up 4 Remove the timer cover and loosen the breaker plate standoffs 5 Remove the timing observation hole plug and rotate the engine until the TDC mark is dead center in the window Refer to the applicable O E service manual for proper identification of TDC mark on flywheel 6 Turn the ignition switch to the ON position 7 Slowly rotate breaker plate back and forth The Controller LED will switch from on to off at TDC 8 Tighten breaker plate standoffs Static timing is now set SETTING ADVANCE TIMING USING TIMING LIGHT NOTE Must be done with the V O E S connected Connect a timing light to the fro
3. 68 13 4352 4399 12 102 102 120 4480 4532 11 137 137 11 RET 4608 4665 10 RET 171 171 10 RET 4736 4798 92 RET 205 205 9 4864 4931 8 RET 239 239 8 4992 7 5064 72 RET 273 273 72 5120 x 5197 62 RET 307 307 62 RET 5248 5330 5 RET 341 341 5 5376 5463 49 RET 375 375 49RET 5504 5596 3 RET 410 410 39RET 5632 5729 22 RET 44A 44A 29RET 5760 2 5862 a 12 RET 478 478 12 RET 5888 6000 10 30 SLOWEST NO CORR NO DELAY 512 512 NO CORR 6016 6133 11 31 1 550 12 ADV 1 546 546 12ADV 6144 1 0 5 6266 12 32 2 1100 29ADV 2 580 580 29ADV 6272 2 1 6399 13 33 3 1650 3 ADV 3 614 614 39 ADV 6400 3 1 5 6532 14 34 4 2200 4 ADV 4 649 649 4e ADV 6528 4 2 6665 15 35 5 2750 5 ADV 5 683 683 52ADV 6656 5 2 5 6798 16 36 6 3300 62 717 717 6 ADV 6784 6 3 6931 17 37 7 3850 72 ADV 751 751 79 ADV 6912 7 3 5 7064 18 38 8 4400 89 ADV 785 785 8 ADV 7040 8 4 7197 19 39 9 4950 9 ADV 819 819 92 ADV 7168 9 4 5 7330 20 40 10 5500 109 ADV 853 853 109ADV 7296 10 5 7463 21 41 11 6050 112ADV 888 888 11 ADV 7424 11 5 5 7596 22 42 12 6600 12 ADV 922 922 12 ADV 7552 12 6 7729 23 43 13 7150 132 ADV 956 956 13 ADV 7780 13 6 5 7862 24 44 14 7700 14 ADV 990 990 14 ADV 7808 14 7 8000 25
4. for single fire operation use for front coil Mode Selectable Switch B Computer Interface Connection Mode Selectable Switch A 1 800 976 1066 www vthunder com FAX 901 366 1807 1 800 976 1066 www vthunder com FAX 901 366 1807
5. CONTROLLER NOTE On 1980 1983 models replace the original rotor with the newer style found on later models and on 1980 1987 models replace the original sensor with the newer style found on later models DUAL FIRE MODE 1 Install the Controller ignition computer in position where the O E ignition module was and con nect to the O E harness If you have purchased the correct part number the connectors on the 0 harness and the Controller will mate 2 Disconnect purple white wire to the V O E S if not used We recommend using the V O E S SINGLE FIRE MODE Note Most single fire motorcycle coils have the terminals marked one terminal for Coil positive and the other for Coil negative Dual Fire motorcycle coils typically do not mark so either may be used for negative or positive 1 1 800 976 1066 www vthunder com FAX 901 366 1807 1 Connect the Controller loose blue wire to the Coil negative terminal on the coil for the front cylin der harness coil negative wire will go to the rear cylinder coil 2 Use a jumper wire from the positive terminal of the front coil to the positive terminal of the rear coil 3 Disconnect purple white wire to the V O E S if not used We recommend using the V 0 E S The V O E S is normally an open circuit that closes and grounds the circuit input above 3 5 inches of vacuum This increases total advance and should improve part throttle drivability and fue
6. EFORE ATTEMPTING TO PROGRAM The Controller Super Performance Ignition Computer is a fully programmable unit designed to replace the O E original equipment ignition system on 1970 and later Harley Davidson motorcycles The Controller features high tech programming capabili ties with ease of operation and allows single or dual fire capabilities with the late model O E electronic pickup and rotor A timing LED also indicates 1 static timing via top dead center 2 switch selectable programming mode 3 diagnostic information when programming the computer 4 operational readiness NOTE For full software programmability purchase V Thunder ProFire Controller soft ware and interface module part VTPM2100 1 800 976 1066 www vthunder com FAX 901 366 1807 __ INSTRUCTIONS COIL AND SPARK PLUG CABLE RECOMMENDATIONS We recommend replacing the coil with a coil delivering higher output Coils used with the Controller must have at least 2 ohms primary resistance If a lower ohm coil is desired purchase of the V Thunder ProFire software is necessary to change settings to accommodate the lower ohm coil The Controller will operate either in single or dual fire modes with one or two spark plugs per head Do not use solid core or braided spark plug cables they will cause interference with your ignition computer and accessories REMOVAL COMPONENTS NOTE Before working on any part of your motorcycle it is necessary
7. N OF TERMS amp COMMON USAGE V 0 E S RETARD The V O E S stock on Harley V Twins from 1983 to present is used to retard the spark timing under high load conditions The V O E S signal is a normally open switch which when open the ignition module responds by retarding the spark advance based on the value in the V 0 E S RETARD MAP for the current RPM The switch will close when more than 4 5 inches of vacuum is evident thereby eliminating the retard With the Controller the user may program the correct amount of V O E S retard in 500 rpm increments With the factory Controller settings there is a flat correction of 52 for all rpm ranges Improvements in fuel economy and response may be found by increasing both base advance and 0 5 retard so that full load timing is unaffected but light load timing is increased NOTE High Vacuum Light Load ACCELERATION ADVANCE This corrections mainly intended for high performance engines which can have very high accelera tion rates Electronic ignition systems calculate engine rpm and position by measuring the time peri od between 2 known positions Under steady state conditions steady rpm and throttle position this method is highly accurate Acceleration introduces an error which tends to retard spark timing Also an engine which is accelerating can tolerate an increased spark advance which would normal ly cause detonation under steady state conditions The increase in spark advance under tran
8. chargers or high gear retard The RPM switch combines a switch activated by RPM with a timing retard feature both being programmable via the mode selectable switches or the V Thunder ProFire Controller Software Use of the RPM switch requires harness kit part VTE2200 INSTALLATION FOR RPM SWITCH see figure 1 1 VO E S wire to 0 5 or any type trigger switch 2 Use VTE2200 harness with micro relay and any type master arm switch OPERATION 1 Set nitrous arming RPM delay to desired settings with mode selectable switches or software 2 Enable the system by turning the master arm switch to on When the arming RPM is reached the delay begins counting down then the nitrous solenoid is opened Once the engine RPM goes below the arming RPM the nitrous solenoid will close If you are using the auxiliary rev limit with the nitrous program you will need to use a momentary contact type switch on the 0 5 wire As long as you keep the switch depressed the auxiliary RPM will be in effect Once you release the momentary contact switch the timing will return to normal set tings then the nitrous program will begin if the master arm switch for the solenoid is on Then the Controller will look for the programmed Nitrous Aming RPM Mode and when it is exceeded the pre programmed Nitrous Delay countdown starts When the delay is satisfied the nitrous solenoid will open and the timing will retard via the V O E S curve DEFINITIO
9. e timing and a positive number in this field will correct for retarded spark Another advantage of the Cam Sensor Sync is in helping to eliminate starter kickback When you have determined that the overall advance curve is where you are deriving the best performance but you are having a starter kickback problem the following steps can be taken Physically retard the cam sensor plate a few degrees at a time 3 42 maximum until the bike starts without kickback With the bike running reset the timing with a timing light but use the Cam Sensor Sync to get the advance mark dead center in the timing inspection hole The bike will now crank with a slightly retarded spark but when the motor fires the Cam Sensor Sync will take out the retarded spark CAM SENSOR OFFSET All hall effect and optical sensors have a delay time between the trigger action rotor wheel notch and the output signal This delay is usually negligible at low rpm but may not be at higher speeds If spark timing retards at high speed even though programmed timing is constant then a larger value may correct the problem REV LIMIT RATE This is the softness of the rev limit Larger values will make a smoother rev limit If the value is too high the rev limiter may not stop engine acceleration and the rpm will overshoot the desired limit Higher performance engines will require smaller values IGNITION DELAY For kickstart bikes this value should be 0 Higher values may prevent sta
10. ed with high compression to avoid backfire Factory setting 0 10 START MODE EXIT RPM F O rpm 0 500mm F 1000rpm Engine speed above which special start mode spark operation stops and normal operation begins Should be below idle speed but above cranking speed Factory setting 500rpm 11 START MODE ENTER RPM F 0 rpm 0 500rpm F 1000rpm Engine speed below which special start mode spark operation resumes and normal operation ends Should be below start mode exit rpm Factory setting 300rpm 12 CAM SENSOR SYNC F retard 15 0 no correction adv 15 Offset correction for cam sensor installation error Factory setting 0 13 AUX RPM LIMIT 0 0mm 8000 Auxiliary RPM limit setting 2 step limiter Factory setting 4 4000 RPM 1 800 976 1066 www vthunder com FAX 901 366 1807 _ INSTRUCTIONS see 14 BASE DWELL 1 1 5 F 15mS Coil saturation time at 12 volts Higher values may increase spark energy depending on rpm voltage etc Lower numbers conserve battery power Factory setting A 10 mS 15 NITROUS DELAY Range 0 0 seconds F 7 5 seconds Delay for nitrous to kick in after RPM switch activates Factory setting 8 Denotes advanced programming option Use factory settings in most cases Changes to base dwell can result in damage to the Controller and or coils Reading The Current Value Reading the Current Value function gives the actual value of the A switch setting i e X amoun
11. l economy 4 Connect the Controller loose green wire directly to the tach wire if you are using a tach 5 Reconnect battery ground cable The Controller is grounded through the O E wiring harness OPERATION OF THE CONTROLLER VIA MODE SELECTABLE SWITCHES MODE 1 Operation in Mode 1 is the simplest programming mode The position of the two rotary switches is used to set all operating parameters Each unit is shipped from the factory with a Mode 1 curve 6 program installed Switch A is used to set rev limit RPM and single dual fire mode Switch B sets the ignition parameters for up to 14 pre programmed factory curves Consult Table l Switch A for rev limit and fire mode settings Table 1 Switch B shows ignition curve applications 1 With the ignition switch in the off position set switches A and B to desired position Power igni tion switch on LED will start blinking rapidly signifying successful programming Turn ignition switch off and reset switches to the O position 2 If stock sensor plate has been moved from original position follow procedure for static timing 3 Power up ignition and start engine If response is sluggish use a more aggressive curve If spark knock occurs use a less aggressive curve 4 If more precise control is needed use operation mode 2 to fine tune system After initial start up LED will be constant on If LED continues to blink with the engine running this indicates a problem
12. nt cylinder Set the Controller to position 6 with Switch B Run the engine at 2000 2500 RPM Adjust breaker plate position until advance timing mark is centered in the observation hole Use a O E service manual for your model if you are not sure of the advance timing mark Fasten the standoffs and verify that timing has not shifted Some timing lights with a dial feature may not be compatible with the Harley amp V Twin odd fire engine TROUBLESHOOTING DO NOT install the Controller until problems with the original ignition system have been isolated and fixed When you have determined that the original system and motorcycle are working properly then install the Controller With the Controller installed if the engine will not start or runs rough or intermittently 1 Check that timing LED lights up when ignition key is first turned on If not check for 12 volts on red wire from Controller 2 Check that timing LED blinks while engine is cranked If not the Controller may not be operating properly 3 If the timing LED blinks but engine will not start recheck all wire harness connections and igni tion coil s CHECKING FOR SPARK WARNING NEVER CRANK THE ENGINE WITH ANY SPARK PLUG WIRE DISCONNECTED GROUND ANY UNUSED SPARK PLUG WIRE 1 800 976 1066 www vthunder com FAX 901 366 1807 PROGRAMMABLE RPM SWITCH WITH RETARD The rpm switch can be used for nitrous oxide applications as well as turbo amp super
13. or Controller A Super Performance Ignition Computer for Harley Davidson Motorcycles Part VT 128 Table of Contents Warranty Introduction Installation Mode 1 Operation Mode 1 Switch Functions Mode 2 Operation Mode 2 Switch Functions Reading the Current Value Mode 2 Switch Values Chart Timing Procedures Troubleshooting Programmable RPM Switch Definitions amp Usage 9 11 Wiring Diagram 11 Notes 12 N 1 Warranty Information This V Thunder product is covered by a limited warranty that it is free from defects in material workmanship and against excessive wear for a period of two 2 years V Thunder s obligation under this warranty is limited to the repair or replacement of its product only It is not responsible for incidental and consequential damages property damage or personal injury damages to the extent permitted by law Some states do not allow warranty limitation so the above may not apply to you There is absolutely no warranty on any parts used in racing applications or on products that have been physi cally altered improperly installed or maintained used in improper applications abused or not used in conjunction with the proper parts To make a warranty claim you must return the product with a copy of your invoice prepaid to V Thunder 3406 Democrat Road Memphis TN 38118 1 800 967 1066 CAUTION YOU MUST READ THIS ENTIRE MANUAL B
14. rter kickback by allowing engine inertia to build before firing the ignition Each increment equals on flywheel revolution START MODE EXIT RPM Under start up conditions the ignition stimulates point ignition which produces highly accurate but retarded spark timing no calculations just precise timing Start Mode Exit RPM is the RPM at which the transition from start mode occurs This should be set just above the lowest idling speed This helps to ensure that the bike starts properly and will keep the bike from stalling at very low RPM EXAMPLE With the Start Mode Exit RPM set at 500 RPM the motor has to turn at least 10 revolutions at 501 RPM or greater for the exit start mode to and enter run mode With the Start Mode Enter RPM set at 350 RPM the motor must drop below 350 RPM to return to the start mode START MODE ENTER RPM Once the engine has entered Run mode if the engine speed drops below this rpm it reenters Start mode to prevent stall from occurring This value should normally be set between 100 200 rpm less than Start Mode Exit Rpm AUXILIARY REV LIMIT Mainly for drag racing this is a secondary rev limit which is actuated by grounding the 0 5 wire When the ground is disconnected from the V O E S line the normal rev limit takes over again Typically a momentary contact switch should be used 1 800 976 1066 www vthunder com FAX 901 366 1807 80 INSTRUCTIONS COMES NITROUS ARMING RPM RPM that m
15. sient conditions temporary changes in rpm and throttle position can make the engine more responsive It should be noted however that large corrections at low acceleration rates can cause erratic behavior in the engine ACCELERATION DWELL This correction increases coil saturation time under acceleration conditions to ensure the highest spark energy is available The amount of correction required will vary for different coils 1 800 976 1066 www vthunder com FAX 901 366 1807 __ INSTRUCTIONS BASE DWELL This correction is used to maintain a balance between spark energy and power consumption coil and ignition module temperature As battery voltage is increased dwell requirement decreases Also different coils require different dwell for maximum energy output This allows flexibility for dif ferent applications EXTREME CAUTION must be used when making changes to the base dwell as damage to the coil and or ignition computer can result DO NOT change this setting without factory guidelines CAM SENSOR SYNC This function corrects for a misaligned sensor plate When using a timing light if you do not see the advance timing mark in the timing inspection hole you must static time the engine first If you do see the advance mark in the timing inspection hole but it is not centered in the window you can use the cam sensor sync function to correct the problem without moving the sensor plate A nega tive value can correct for advanc
16. t of advance X amount of RPM etc To determine the value attached to the number of times the LED blinks refer to Table 2 Mode 2 Switch Functions 1 With the ignition switch in the off position set switches A and B to zero 2 Move the ignition switch to the on position 3 Rotate switch A in the counterclockwise direction to the desired option While rotating the switch do not stop for more than one 1 second before reaching the desired option number or the switch will take a reading 4 New value will now be echoed back by led blinks Example 3 blinks positive 3 1 long blink 3 blinks negative 3 5 After LED stops blinking ignition switch in On or OFF position set switch A back to 0 to conclude read operation NOTE For the 0 switch position the LED will issue one long blink For the 1 position the LED will issue one short blink 1 800 976 1066 www vthunder com FAX 901 366 1807 Table 3 Mode Switch B Values 990T 9 6 008 T WOJVIPUNYIA MMM 108779967106 gt MAIN MIN MAX CURVE VO ES NOS REARCYL VO E S START START AUX BASE NOS REVLIMIT ADV ADV SHAPE ARM TIMING RET MODE MODE SENS RPM DWELL DELAY RPM DEG DEG DEG RPM DEG DEG EXIT ENTER SYNC LIMIT mS SEC RPM RPM DEG RPM 4000 15 RET 152RET 4096 4133 142 RET 34 34 142RET 4224 4266 13 68
17. to remove the ground cable from the battery frame POINTS IGNITION 1970 TO 1977 1 Disconnect wire going from breaker points to Coil negative terminal 2 Remove ignition cover plate gasket and hardware 3 Mark the position of breaker plate with the V notch When you install the Controller you should align the V notch in the same position which will set the timing close enough to start the engine Remove and save the two standoffs and washers then remove the breaker plate assembly wiring breaker cam and advance assembly unit 4 Replace with O E pickup part 32400 80A rotor 32402 83 and adapter harness 32408 90 O E ELECTRONIC IGNITION 1978 AND 1979 1 Disconnect wires going from ignition module to coil 2 Remove ignition cover plate and hardware Remove ignition module 3 Mark the position of the timer plate with the V notch When you install the Controller you should align the V notch in the same position which will set the timing close enough to start the engine Remove and save the two standoffs and washers Remove the sensor shield timer plate trigger rotor and advance assembly 4 Replace with O E pickup part 32400 80A rotor 32402 83 and adapter harness 32408 90 On 1970 1979 models it will be necessary to select a location and fabricate a mount on the frame for The Controller O E ELECTRONIC IGNITION 1980 AND LATER 1 Remove the ignition module only INSTALLATION OF THE
18. ues Programming New Values 1 With the ignition switch in the off position set switches A and to zero 2 Move the ignition switch to the on position 3 Rotate switch A in the clockwise direction to the desired option Led should blink in a repeat ing pattern of 3 on 1 off Rotate switch B to 1 or F to indicate sign or before actual programming Clockwise from 0 is a positive value Counterclockwise from 0 is a negative value Wait for led to stop blinking Rotate switch B to desired value to set actual program Set switch A back to 0 this burns the newly programmed value into memory New value will now be echoed back by LED Example 3 blinks positive 3 1 long blink 3 blinks negative 3 9 After LED stops blinking set switch back to 0 to conclude programming operation gt UI Example Program a rear cylinder offset of 3 degrees retard With the ignition switch in the off position set switches A and B to zero Move the ignition switch to the on position 3 Rotate switch A in the clockwise direction to position 8 to select rear cylinder offset Led should blink in a repeating pattern of 3 on 1 off indicating that the program mode is enabled Rotate switch B to F to indicate a negative value Wait for led to stop blinking Rotate switch B to position 3 Set switch A back to 0 New value should be echoed back by
19. ust be exceeded to enable the nitrous solenoid NITROUS DELAY Time delay before nitrous solenoid activation The delay timer starts after V O E S line is unground ed and after the nitrous arming rpm has been exceeded NOTE Both the nitrous program and the auxiliary rev limit can be used simultaneously as one does not interfere with the other s operation CAUTION Nitrous oxide maximizes the combustion in the cylinder head chamber thereby in creasing the engine s ability to produce large amounts of horsepower This increased perfor mance may reduce engine life and if used without proper safeguards could result in injury WARNING Nitrous oxide should only be used for off street applications with proper safety equipment NOTE Introduction of nitrous oxide into the combustion chamber produces an extreme lean condition This may be addressed by using a fogger with a nitrous and fuel circuit a duel feed fuel valve and a low pressure fuel pump FIGURE 1 Master Arm Switch Operational DO NOT arm until Diagnostical LED Tach output for single fire operation motor is running and nitrous is ready for use Orange Yellow Micro Relay o O Orange Black 12 Volt N O S Enable 2 output trigger 1 0 i g S 8 VO E S Wire violet 0 5 or any trigger switch g 5 e 7 or 8 Pin d Factory Connector E 2nd Ignition coil
20. within the Controller Shut the engine down and restart TABLE 1 Mode 1 Switch Functions Switch A SWITCH A POSITION REV LIMIT RPM FIRE MODE 0 6000 DUAL 1 6250 DUAL 2 6500 DUAL 3 6750 DUAL 4 7000 DUAL 5 7250 DUAL 6 7500 DUAL 7 7750 DUAL 8 6000 SINGLE 9 6250 SINGLE A 6500 SINGLE B 6750 SINGLE 7000 SINGLE D 7250 SINGLE E 7500 SINGLE F 7750 SINGLE 1 800 976 1066 www vthunder com FAX 901 366 1807 SWITCH B SWITCH MIN MAX IN CURVE B Advance Advance AT Type 0 NOT VALID 1 10 36 3500rpm LEAST AGGRESSIVE 2 12 36 3500rpm AGGRESSIVE 3 12 36 3500rpm VERY AGGRESSIVE 4 12 36 3500rpm MOST AGGRESSIVE 5 10 38 3000rpm LEAST AGGRESSIVE 6 12 38 3000rpm AGGRESSIVE Factory Setting 7 14 38 3000rpm VERY AGGRESSIVE 8 14 38 3000rpm MOST AGGRESSIVE 9 12 40 2500rpm AGGRESSIVE A 14 40 2500rpm AGGRESSIVE B 14 40 2500rpm VERY AGGRESSIVE 14 40 2500 VERY AGGRESSIVE D 14 40 2500rpm MOST AGGRESSIVE E 14 40 2000rpm MOST AGGRESSIVE F NOT VALID NOTE The factory setting should be used for initial timing of the motorcycle It must be used with the V 0 E S MODE 2 Operation in Mode 2 allows the advanced user to adjust each operating parameter independently and with more resolution than Mode 1 operation In Mode 2 Switch A selects the parameter to adjust Switch contains the new value and the diagnostic LED blinks to provide user feedback See Table 2 for a listing of programming options and Table 3 for val
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