Originally Posted by lucid
The problem with the current MDM setup is that it really cuts the power. I don't know if it completely stops torque delivery or not, but the intervention is severe. Moreover, it lasts a good half second or so, and you kind of get "stuck" in that state coming out of a corner, which actually somewhat unsettles the car if you had it in a controlled slide. I am sure the magnitude and the duration of the intervention can be tweaked though.
You have to remember that an M3 is a mass produced (100,000 models) car and is designed for primarily road use by normal drivers. To have a system like I am suggesting I think it would have to be linked to the Sat-Nav that knows when you are on a known race track and only engage then, much like the speed limiter of the Japanese GTRs.
MDM, isn't a great system, it may be better than before but what is required is something similar to the F430. In it's best setting the car can lap within 0.1~0.2s of the car with all settings turned off, such a system may had cost a lot to develop and that's why it's only currently available on very expensive Ferraris.