MMisencik157

My friend parts out wrecked s2000s. I get the rotors for free from him from low mileage cars, get them turned for free, so free brake rotors...too bad I cracked three of them last weekend.

Like this:


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I did one like that, too. It was the result of a sticky brake caliper and not enough cool-down time before stopping to cool the crazy amount of heat it had built up. Even for calipers that are working right, you gotta give them a lot of time to cool after you come off track before you stop the car.
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How long would you suggest letting them cool down? And how? Just go easy on the last lap and let them cool off before going off the track?
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It depends what pads youre using and how much heat you put into them. I used to think that doing the last lap slowly and not touching the brakes would be fine. After struggling with cracking a rotor every single track day I was told to do at least 2 full laps around the paddock very slowly to let the rotors cool down further. This was with full track pads and no ducting though.

Nline6

i all for turning oem rotors for the most part your not taking off to much material if the rotors are not warped to start with. ive had better luck with oem rotors anyway.

as far as the screws go i strongly suggest putting them back in or replacing them with new ones!! yes they can be a pain but as much as we change/take off tires i would always want to have the screws in the rotors. each time you take of a tire you have the chance for a small sliver of rust or something else getting behind the rotor and getting between the rotor and hub. if this happens you get the feel of a warped rotor and the wear as well. so i would replace the screws!!!!

-Brett

boyguan

i put them back on but i screw it on very very loosely only hand tight