Here is a trick for the heat (assuming you have a problem)
Turn on the defroster, turn off A/C, set temp for 85F at full fan. That seems to allow me to run a full session without overheating. Otherwise I get maybe 8 laps before it goes into limp mode.
Mind you this is what I have to do to maintain 1:57ish lap times with a passenger/student, which requires keeping the car close to redline nearly the entire lap and my left foot braced against the a pillar.