I know this has been covered a million times, but this thread would have helped me, so I'm writing it.

I upgraded to 997 rotors and bought some drilled rotors. Have PFC pads. My rotors are cracked and toasted after 4 days at Watkins Glen, and a few hundred miles on the street.

This time around I am buying slotted rotors and the gt3 front ducts (for $11) to try and keep them a bit cooler.

The rears look brand new still interestingly enough...

 

cracking is normal on the drilled rotors, they are safe to continue using until the cracks connect 2 of the holes is the typical guideline. sounds like 4 days at WG would do that

 

Cracked

 

As per repair manual.....

 

while you can try many options and some will work . I run the glen all the time with no brake issues.
Get the cooling ducts from sunocast if there still available. Also call the guys at at www.racingbrake.com. the pads and rotors are the issue.

 

I bought some centric slotted rotors. I use pfc 08 up front and 11 in the rear. I'm told the 11s are more aggressive.

What are you running?

 

I run hats from www.racingbrake.com. pagid yellow & black. i use the larger calipers & rotors from porsche 997 from suncoast.

 

my bad all 4 are hats...