And not just the horsepower. I'm getting my 3650 lb mostly-stock Mustang up to about 125 (on a good day with a tailwind) on the front straight at Heartland. His car was even heavier and was probably seeing 150-160 mph there. I have to start braking about 300 feet from the entrance to the first turn (which is absolutely terrifying) and I'm sure he had to start around 500-600 feet because of the much higher inertia he had to scrub off.
The guys with the 700hp motors can get away with that kind of power because they're *much* lighter. Even my racecar, at 3050 lbs and 380hp lets me brake a lot later because it's so light. Well, that and the fact that the chassis is so solid the back brakes actually *do* something.
The only way I know the 91 has worn out rear brakes is when I hear them scraping. Under heavy braking, the rear tires on that one are barely touching the ground, which is why it's so terrifying -- trying not to let it do a violent spin while I'm doing triple digits about a foot away from a concrete wall.
I hate that layout because you have to scrub off a ton of speed to get ready for an extremely slow right-hander. It wears out brakes and driver very quickly. There's a configuration, though, that's an 85-mph left turn at that location, and it's a LOT more fun. I've actually had to slow that turn down because I can carry so much speed through it I can't get it all scrubbed off for the next one. I remember trying out some autocross tires (even stickier than road-race tires) there once and after a few laps had starting getting some really serious speed through that turn (near 100) only to suddenly find that I was going into the next one WAY too hot. Flat-spotted a pair of brand new tires after only about 5 laps. At $160 per tire. I put most of my used-up tires at the turns on our dirt track, but these occupy a "wall of shame" in my garage.
I've gotten so used to the Hoosiers that if I'm driving that car on street tires, I keep thinking something's wrong. Feels like I'm driving on ice.
I know I've got a pic somewhere showing what I do with my used-up race tires before putting them on the dirt track. Need to find that one.
As you can see, don't get me started on the racing stuff. <g> It's the only thing I'm even more passionate about than online message boards.
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