If you're tracking and need power all over the place.. why don't you just turn off the A/C the odd time? Or are you racing for pinks every time you pull out of your driveway?
If you're so race focused.. why do you want the lowly human comforts of A/C period? Just yank that crap out and be gone with it! Will get you some weight reduction as well.
This guy is hardcore.. he drives his 10 second car not in a straight line.. but to push it, and make it through places no one else would take it. He's a real driver!