New-used owner.
25,000 miles on a stock car.
I've owned the car for a mere 8 weeks and was looking forward to seeing what 330hp would equate to in speed down the long RA back straightaway as my little BMW race car tops out at 120mph (a Spec e30 car with a whopping 150hp).

Long story short version...Max speed was 135mph but it fell off before the end of the straightaway. That was the 1 good lap. One good lap out of about 25 before I parked the (deleted) thing and vowed to get the answer(s) from a group that has experience (that's this forum).

For the balance of the weekend it would fall off (just miserable low power) and it was good for a whopping 110mph.

Likely there is something in the engine management system that is causing it to fall off in power.

Likely you guys have answered this before,but please help this newby.

Regards, Robert Patton

PS, to noavail, the ABS and ESC fuses were pulled out in one of the run sessions.