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Hi! My name is Sam Johnson. I live in Victoria BC, Canada. My project is an Onroad/Offroad Jeep. I am installing a '''GM 4.3L V6 engine''' * sequential EFI (Bosch 0.280.155.968 injectors) * wasted spark ignition (Bosch 3x2 coil) * a single Masterpower MPR R6164-12 turbo, 60mm external wastegate (with 4 way boost control solenoid) ** Air to Water aftercooler. MembersPage/SamJohnson/Pinout MembersPage/SamJohnson/1wire ---- '''Trigger''' * '''60-2 crank''' ** Primary trigger is a Gen4 58x GM sensor (grey in color.) It is a 3-wire sensor with a 5V supply, ground ref and signal output. The hardware is packaged in a round body housing a magnetic sensor and solid state electronics. The electronics convert the AC signal to '''logic level 0-5v square wave signal'''. It outputs a (supposedly) very clean waveform. What do I need to do for the vems to correctly interpret this signal? ** it sounds like a plain '''HALL input''' should suffice ** Here is pic of the crank reluctor (linked from EFI Connection web site.) http://www.eficonnection.com/projects/syty_engine/58xCrankshaftReluctor.jpg * 4x cam sensor (?) ** can you detail this ? Is that a VVTI V6 with 4 cams (2 intake + 2 exhaust sensors ) ? ** or 1 camsensor with 4 pulse-pattern ? How are the pulses timed (they should not be evenly spaced, at least that does not make sense for camsync/secondary trigger) ** secignore can be used to neglect eg. tooth > 13 (just an example), but of course sectrig pulse should only come every 2nd crankrot (tooth 0-12 in the example) There is a single cam sensor with an unevenly spaced 4 pulse-pattern. Here is a picture of the cam reluctor: http://www.eficonnection.com/eficonnection/images/4x_Cam_Reluctor_300w.jpg I am making an effort to find a waveform depicting the cam pulses referenced to crank position. Just capture triggerlog with * '''sectrig=falling''' * and '''sectrig=rising''' It is very likely that with rising or falling edge the first pulse after tooth0 will only be present (say, at tooth6) on every other crank rotation ... than secignore=9 can be used to neglect other sectrig pulses and sync fine. That should be it. Seeing your 2 triggerlogs we can help to configure. ---- Hoping to use VEMS genboard to control the engine with wideband EGO feedback and pre-turbo EGT thermocouple for tuning. I intend to get anti-lag working with my 3 speed automatic transmission (obviously anti-lag NOT required for shifts, only for closed-throttle deceleration and launch.) ---- '''Ion Sensing?''' Is this tech dead? I notice both vems and B&G were developing Ion Sensing boards back in the early 2000's but things seem to have gone quiet since then. What's happening? * it is difficult to reach a sensing resolution that is really useful Is there an opportunity to help with development? * possible, discussing a bit about that on another channel ---- Also hoping to use genboard on-board MAP sensor for '''dynamic BARO correction''' with an engine-mounted Bosch TMAP (2.5 Bar) as the primary MAP sensor. * baro correction can use external sensor (115 kPa, or same range as internal MAP sensor are most common to use, but... ) ** See [http://www.vems.hu/vt/help/v3/v3_engine_setup.html Barometric Pressure Correction] Do you mean to say " baro correction can use INTERNAL sensor " ? * yes, you can request in the order comment "an internally mounted baro pressure sensor connected to mcp3208" (dynamic compensation during running - dynamic baro compensation is required for mountain rally or airplane) * or even internal or external MAP sensor can be used for baro compensation if it's sufficient to sample barometric pressure at boot-time ** a common method for engines rarely driven at a much higher altitude than it was tuned... -20% pressure that requires appr +8.2% fuel can be handled easily by tuning +8% rich and leaning with wideband-lambda-ego. ---- Also of possible interest to the community is my effort to model the engine in Ricardo WAVE. I have a working model now but am still calibrating with dyno logs from similar engines. Once calibration is complete, I hope to link the model to a SIMULINK model of the VEMS. Has anyone modelled the VEMS firmware in SIMULINK? * Probably not
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