Quote:
Originally Posted by Megator
Also the M differential in the RWD models is NOT TORQUE VECTORING DAMN IT! 
It has variable lock. This might be against regs or simply no hardcore enough for Motorsport use or maybe to unpredictable as the computer decides when to lock the diff. |
Probably all the above but the unpredictability might be the main reason. A set lockup is more race track friendly when the brake based assist is tuned out.
Check out the 235i below with a M Performance 40% locking diff, notice how linear it is to control around the track.