My ’91 M5, quite clean of carbon engine responded well to Marks’ chip. The telling difference over the Dinan chip in my car was the fact that all of a sudden, on full throttle, my wheels are breaking loose on initial Acceleration and again at around 6K rpm on up … extremely pleasing to the senses. Objective assessment; no seat of the pants difference at low rpm, significantly increased throttle response, very noticeable increase in power above 4-5k rpm. No flat spots and no pinging that I’ve noticed yet.
Mark, nice job!