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I use VEMS V3.6 on my dragcar powered by a cbr1100xx engine. Until now the engine was running on four carburetors plus nitrous and the performance was very good (8.7sec@402m). I turned to fuel injection and VEMS in order to use all the extra racing features (like launch control, shift cut, etc) and be able to have a more precise engine control. IMPORTANT NOTE: USE MAP SENSOR FOR ENGINE LOAD AND TPS FOR ACCELERATION ENRICHMENT. EVEN WITH 4 THROTTLE BODIES INDUCTION SYSTEMS (ONE THROTTLE BODY PER CYLINDER) AVOID USING TPS FOR ENGINE LOAD. ---- Firing sequence: 1,3,4,2 '''Ignition outputs''' (wasted spark/2 coils): cyl2 EC36-pin36 cyl4 EC36-pin34 cyl3 EC36-pin36 cyl1 EC36-pin34 '''Injector outputs''' cyl2 EC36-pin19 cyl4 EC36-pin20 cyl3 EC36-pin8 cyl1 EC36-pin7 '''Other outputs in use:''' '''fuel pump relay''' EC36-pin15 NO idle air valve because injection bodies have special air valves for idle controled by water temp (almost all injection CBR engines). '''Shifter relay''' EC36-pin4 '''TPS''' original pinout (EC36-pin1/29/AN.GND) '''CLT IN''' original pinout (EC36-pin14) '''Prim. Trigger''' original pinout (EC36-pin27/AN. GND/ Shield) '''MAP Sensor''' original input (EC18-pin6) No other inputs/outputs are used. ---- '''SOFT/FIRM''' In the past (1.0.73 firmware) '''I was using MegaTune software with no problem.''' '''answer this questions please''' I configured the ecu myself from the start and it was almost as easy as any other ecu I have used until now. I have not saved the config file (my fault). I used also the VemsTune0.10.20(2010.03.08) and the firmware uploaded on VEMS V3.6 is '''1.0.73.''' * that is good. Stick with 1.0.x because the 12-3 pattern is supported only by 1.0.x firmware. (1.1.x works with N-1 or N-2 but not with N-3 !) ---- '''TRIGGER''' I use the original trigger wheel and VR sensor of the cbr1100xx with no problem. The cbr1100xx (carburated model) uses a 9teeth trigger wheel with one big missing tooth (later injection model had a 12teeth trigger wheel with no missing teeth). http://www.vems.hu/files/AutoVeltiosis/cbr1100_trigger.jpg '''It's a 12-3''' pattern (toothwidth=30 degrees). Unfortunately this is not supported with 1.1.x firmware, you can only use N-2 or N-1 pattern as set in the primary trigger options. You might need to use '''1.0.x firmware for now with this pattern.''' The following Trigger Setting were tested as long as I use the Megatune and were proven to work fine with 1.0.x firmware. Now I use Firm 1.0.73 and everything works fine. Engine fires up and is tuned easy. I have uploaded my working config in the files area. * plan to change to N-1 or N-2 trigger wheel (which one would you recomend?) ** '''12-2 recommended''', as 12-1 sometimes sees so quick RPM changes during cranking that "advanced filter" must be used and adjusted. Otherwise 24-1, 36-1 or 60-2 are common (and good) setups. ** note: 4-1 is the simplest trigger for a 4cyl. * I will try to move on a newer firmware. ** See the latest released on GenBoard/UnderDevelopment/FirmwareChanges (currently 1.1.70). Don't attempt it without following the instructions! Config '''MUST''' be uploaded after upgrade. ** please postpone this if possible. There are much more settings in 1.1.x and there is little to gain. ---- I use the original honda MAP sensor thta is attached on the throttle bodies. To adjust the sensor range in VemsTune set Offset: Range: ---- '''Coolant temperature sensor''' ECU is not responding on coolant bins/firm 1.0.73 because '''the internal pullup (2k7) is ment for appr 2000 .. 2252 .. 3000 Ohm sensor''', not a low resistance sensor like the CBR1100 has: '''Stock Water Temp Sensor (CBR1100XX)''' '''C/Ohm''' 15/785 20/570 25/440 '''Surprisingly low resistance.''' Appr 19.5% of standard 2252 ohm. 30/355 40/237 50/157 60/107 70/74 80/55 90/40 100/29 Thanx for the precise specification in your query (3..4 points are usually OK with NTC sensor; the 25C point helps a LOT. Thanx!) * A '''656 Ohm (650 ohm should be perfect) pullup resistor''' (in parallel with the onboard 2700 Ohm) ** gives effective 528 Ohm (which is 19.5% of the default 2700 Ohm). ** That gives same curve as the standard sensor and standard pullup.
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