DFWSBR- I'm sure what you describe may be true for RACE conditions. But I think CLASS would be different.
So, out of curiosity, I asked the following:
Q: For my own car. How much wear and tear on the tires? I have heard some horror stories.
A: Depending on your driving abilities and the type of tire you
have on your car you shouldnft wear much if you are using a higher mileage tire. High tire wear is created from over driving or pushing to the limit lap after lap. Michigan Int'l Speedway is not a tire wear track.
Q: and how safe is the class driving...What could be the top speed at MIS for the perf class?
A: You are assigned an in-car instructor at all times. We start at lower speeds and progress as your instructor sees improvement. Day 1 will be basic track familiarization and car control. Day 2 you will work on smoothness and maximizing your skills.
Looking forward to seeing you at Michigan.
Dan Schmitt
Director Track Time Performance Driving School
BTW here is couple more class where you can take your own car.
www.tracktime.com
www.speedtrialusa.com