Originally Posted by Adam Way
Buy an M3. I have literally spent thousands on trying to get my vehicle limp mode proof. It is an expensive ordeal on the 335. Most people on this forum that I have noticed don't really track their car all that much. For those that do, limp mode is a big issue during the summer months for this vehicle. I have have bought every accessory currently offered and had some custom made to 'help' with this issue. I can now lap, but that's 10K later...
A stock M3 is not a solution either. Agreed though that cooling the N54 for track duty is a more expensive ordeal.
Have a look at the M3 track forum, top thread right now is "Overheating at the track" with overheating reports within a few laps and 80F, and discussions on cooling mods...