I would be just guessing on it. They could be tuning the traction control system, or modifying the power level itself. During a drag race there's a lot of variables like wheel speed for example. You never want a tire to have 100% traction (called a dead hook) because the jerking will slow you down and usually breaks stuff. You always want a little bit of wheel speed (spinning) but not too much. What that specific limit is on a tesla is, I have no clue. Then you have to adapt that variable to the surface you're on and how your tires are reacting.I just watched the video with jay lenno running 9.2 and the tesla professional driver running 9.23 at 152.16 whats interesting is the 1/8 mile trap speed was 121mph @ 5.99 ...so i dont believe its just due to traction to get 121mph rather more power. I saw a laptop next to the driver and some engineers in the car so its possible for a power boost . Jay lenno running the car full weight and he is not small to run 9.2 requires more power. Your thoughts?
There's a ton of things they could be doing with unrestricted access to the computer, but it's just impossible to know for certain.