Originally Posted by Porschefile
That's very hard to believe. Normal rotor temps are 1000+. Are you pulling into the pits after a cool down lap and seeing 500? If you think about it, rotors frequently get to 1000+; iron does not glow orange at 500 degrees.
Also, if the temps are the same as last event with no cooling but ambient temps are 20 degrees higher, that is not a good sign for the ducts. Ambient has little effect on rotor temps. Ambient has a major effect on tire temp because they only get to ~200, but since rotors get way way hotter than that the ambient being 20 deg off doesn't matter so much.
Well I'm running a brembo 380gt kit so heat was never an issue. I check temps in the paddock right after my session is over and around 500 degrees is what my rotors read. Track layout makes a big difference in how much braking you are doing as well. I'm not hitting speeds over 115-120 at Laguna Seca.
My rotors aren't glowing either. Those are just a very bright yellow caliper.