I went in July for a 30% discount IIRC. The first day I was using 2nd and 3rd gear on the course.
The coolant hit about 240F without me watching it until I got a warning on the dash. I mentioned it to the instructor and he recommended I try to just use 3rd gear to help keep the engine revs lower. I still got over 235, now with the gauge up on the center display, so they swapped me to another car that ran at least 10F cooler.
My 2nd issue was with the Power stop Track Day pads. Even on this short course I could over temp them after the straight leading into the chicane. They completely changed my brakes and rotors and fluid at lunch and it was no real help. I just had to take it easy on braking for that turn. I was wishing for some Hawk DTC70 pads.
I don't think they want you to really time attack these cars and of course you don't have to, to get a lot of benefit from the class.
It was my first experience on a track that made me feel like a pro racer. If something was wrong I got a backup car or a pit crew that just did all the work for me. Made me think . . .