Originally Posted by sleepless
I'm constantly impressed by the M3, especially in nearly stock form:
Thanks for posting. Great elevation changes--looks like a fun track.
It was interesting to see your throttle position readout. At what was clearly 100% throttle, flat to the floor, the system was reading 75%. I have the exact same issue with my RaceKeeper system. I assume your system pulls the throttle data from the OBD port like mine does. I had my dealer service dept check the car, and my car runs at 100% throttle, so it has something to do with the way the throttle data is interpreted coming through the OBD port. A more direct CAN connection might end up being more accurate.