[NOT A TA]

Those particular ones were Raybestos "heavy Duty" semi metallic. I've used 3 sets of those on the current rotors. Tried Ceramics before that which didn't even last a day at Road Atlanta.

This is a stock size setup with single piston front calipers and rear drums. Trying to haul down 4000 lbs over and over on a road track in 100 degree heat puts a tremendous amount of heat into the brakes. The rear shoes usually crack down the middle although switching to finned drums helped that a bit.

I'm going to try to finish up some brake ducting I've been working on and see if that helps. Thinking of trying Willwood and Hawk pads next (with new rotors for each) at the next couple tracks.

The simple answer is to put big 4 wheel discs on. However that would also require buying all new wheels because the brake change will push the wheels out and I'm already at the limit. So not only would I have to spend a couple grand on the brakes, then I'd also need new custom made wheels.