I don't know about BMW, but I worked on a Porsche RSR and all we had to do to disengage the ABS for the track was pull the ABS fuse. I also did this to my old 928s4 and it did it.
FYI I don't recomend it if you don't have the LSD our cars run open diff and the DSC actually makes a huge difference in our rides.
I am fan of ABS myself, but I prefer not to have it on the track.
Originally Posted by Born Again
relax kiddies ur 10 year old car is still god on this forum