Does anyone have any prom tuning experience? which programs do you use also i have a tuning backgound with obd1 gms so what chips do you use they look from what pictures ive seen look like 27SF512
I have some experience but not with BMW's. I'm currently trying to find a decent motronic editor that is user friendly for the M42 ecu's. So far, I've only been able to find 1 motronic editor but it cost some $ and isn't M42 specific. You are corect in the 27SF512 type chip.
Based on your sig, I'm assuming you're looking for something like Crome?