Originally Posted by Z K
I was not referring to your post. I was responding to Christopherchenm's post which generalized NA and FI.
I ran Buttonwillow once, didn't time it. IMHO probably wouldn't be too good as it was my first and only time there. My fastest time at Thunderhill was 2:09.4 over the top in my car and 1:50 at Laguna Seca. I've been tracking and instructing for over 10 years so I've done it in many different cars.
But you are right, it is going off topic. In terms of N54 and S65, definitely I'd pick the M3 for track duty.
I can't wait to run Laguna Seca one day.