Has anybody run an s38 on megasquirt? I am contemplating it due to the adjustablity it has.
-IAT sensor
-60-2 CPS
- MAF (not AFM)
-55 pin Bosch motronic 1.2 350 ecu
The main difference between other applications would be:
-switch style TPS, either upgrade to vTPS from M50 or use auto e34 TPS
-tune for alpha n or ITBs
-double check wiring diagrams for premade ecu (for m20) vs s38 pinout
Am I missing anything? It seems to me the MS2 would be a worthwhile upgrade of the S38, are M5 owners too much of purists to deviate from the stock ecu?
Page 135 has the ecu pinout for the s38b36 for future reference
E30 M1.3 ECU pinout:
It looks like a few things are different between the ECU pinouts, mainly the following pins related to AFM and an auto trans that came with the m20.
Pin 7 - Mass air flow vs AFM
Pin 12 - Not Used vs AFM Reference
Pin 23 - Air Pump relay vs O2 Sensor Heater
Pin 25 -Preheat MAF vs Not used
Pin 26- MAF ground vs AFM ground
Pin 32 - (maybe) Measuring signal to OBC vs econometer
pin 43 - MAF vs Not used
pin 50 -not used vs ABS fuel cut override
pin 51 - not used vs auto kickdown
pin 54 - fuel coding signal vs torque converter lockup switch
I'm guessing pin 23 is the actuator for the intake plenum valve? It would be nice to keep that feature somehow. I would obviously need a widebad to get it tuned but once that was done it could be set it and forget it, right?
-IAT sensor
-60-2 CPS
- MAF (not AFM)
-55 pin Bosch motronic 1.2 350 ecu
The main difference between other applications would be:
-switch style TPS, either upgrade to vTPS from M50 or use auto e34 TPS
-tune for alpha n or ITBs
-double check wiring diagrams for premade ecu (for m20) vs s38 pinout
Am I missing anything? It seems to me the MS2 would be a worthwhile upgrade of the S38, are M5 owners too much of purists to deviate from the stock ecu?
Page 135 has the ecu pinout for the s38b36 for future reference
E30 M1.3 ECU pinout:
It looks like a few things are different between the ECU pinouts, mainly the following pins related to AFM and an auto trans that came with the m20.
Pin 7 - Mass air flow vs AFM
Pin 12 - Not Used vs AFM Reference
Pin 23 - Air Pump relay vs O2 Sensor Heater
Pin 25 -Preheat MAF vs Not used
Pin 26- MAF ground vs AFM ground
Pin 32 - (maybe) Measuring signal to OBC vs econometer
pin 43 - MAF vs Not used
pin 50 -not used vs ABS fuel cut override
pin 51 - not used vs auto kickdown
pin 54 - fuel coding signal vs torque converter lockup switch
I'm guessing pin 23 is the actuator for the intake plenum valve? It would be nice to keep that feature somehow. I would obviously need a widebad to get it tuned but once that was done it could be set it and forget it, right?
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