Assumed the devs knew of this issue but someone on discord told me to post here. The USF2000 car is able to use 100% grill tape without overheating or blowing up. Thank you.
USF2000 has a few bugs that were never issued. For example: -middle tire temperature is always too high, -rear camber is not enough, -caster should be unlocked as per rules (if I read it correctly), but you can't change it in the setup screen.