Brake cooling

[bman]

Great info Peter, thanks!

I've been following your threads on rotors, pads and cooling anticipating the need to upgade my components. But I've had an "unusual" experience with my car.

I switched from PCCB's this past March. I replaced with a lightly used set of '10 Cup rotors and calipers. The rotors are the same as the stock .2 GT3 steel. The front rotors had a moderate amount of cracking but nothing near the edge or interconnecting between holes. Assuming they wouldn't last long I purchased a backup pair of front rotors at the same time. Surprisingly I have not changed the original USED rotors and have about 18-20 days on them. Cracking has grown but still not at the point where I would replace. Granted I don't have the harsh Florida heat but I have run many days with ambient temps above 95f.

I am baffled by this......I fully expected to have replaced the original rotors and the replacement set by now. I don't know if it's a fluke, something to do with the GT2 cooling or the CUP caliper. Hopefully someone will come to my defense when it comes to driving hard....... I have stopped late braking every corner, not sure that makes a difference.

FWIW, I had converted my Cayman to GT3 rotors and calipers and would go through stock drilled rotors in less than 10 days with RS19 pads. I switched to AP and they've held up for 1yr and half. Although my wife drives it mostly now.

I ran RS19's most of this year and experience a lot of tapering. I flip them often. I've just switched to RS14 and will be watching the tapering. I will likely be trying some PFC 08s thanks to your feedback.