We have the 2 worst tracks in the country for brakes. Blackhawk is 5 threshhold brakes per lap. 4 from top of 4th gear and 1 from top of 3rd gear. And we have Road Aamerica. Fast speeds, fairly slow corners build lots of heat in the brakes. Then the long straight allows everything to cool. You end up with brakes that go super hot, to cool to super hot, to cool again. The constant temp change causes cracking and warping. By using top quality rotors, l prefer the Brembo's, I have almost eliminated rotor issues.
Typical parts store rotors won't last a day at Blackhawk
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2014 Central Division Champion, ITS (Wheeler)
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Over 200 race wins and counting.