Hello all:

As in another post, I lost brakes at a recent track event. After some commentary and research, I am adding the phaeton duct (thanks Jim and Ben of course!).

Second, I spoke with Carbotech (and sent pics) and they stated the following:

"You need to switch to the XP12 or RP2 compounds. You are going over the temp limits of the XP10, the pads did well to keep you safe as long as they did. I would recommend the RP2."

I don't know what temps the rotors were hitting, but they were certainly warm. Carbotech's site says this about their XP10 and XP12. I didn't see a description of the RP2 compound.

Carbotech™ XP10™ (1110™)
When Carbotech unleashed the XP10™ to the general public, and it was an instant success, gathering multiple regional, divisional, and national championships. The XP10™ is a very high initial bite friction material, with a coefficient of friction and rotor friendliness unmatched in the industry. Fade resistance is in excess of 1650°F. Due to the high level of friction and bite, this material is recommended for cars weighing around 2,000lbs or more, not including formula cars and cars with brake bias bars weighing less than 2,000lbs. This is the preferred compound for the front of Spec Miata racers, SSC,SSB, T3, SRF, ITS, ITE, H1,H2, H3, H4, 944 Cup, ST, GS, Factory Five Cobra’s and many more Grand-Am/ALMS/SCCA/NASA classes. XP10™ is also ideal for advanced/instructor level HPDE drivers. XP10™ still maintains the highly praised release and excellent modulation, rotor friendliness, and 100% non-corrosive dust that have made all Carbotech compounds so successful. XP10™ is not recommended as a daily-driven street pad due to possible elevated levels of dust and noise.

Carbotech™ XP12™ (1112™)
The latest iteration of the highly successful XP™ series of compounds with an extremely high initial bite, torque and fade resistance than compound XP10™. XP12™ is a world leading friction compound that is unmatched as a Ceramic racing compound, with a temperature range of 250°F to 2000°F+. The XP12™ still has that excellent Carbotech release and modulation that has made all other Carbotech compounds so successful. The XP12™ is the most rotor aggressive compound Carbotech offers, but compared to the competition the XP12™ is still very rotor friendly and contains 100% non-corrosive dust. XP12™ is recommended only for expert/very advanced drivers. XP12™ is found to be most affective on race cars weighing 2,400lbs or more using R-Compound tires; or street cars weighing 3,200lbs or more for track use only. Ideal for LMP1, LMP2, DP, T1, T2, T3, H1, H2, GT1, GT2, GT3, TC, GT, ST, GS, MX-5 Cup, etc… XP12™ is NOT recommended for use as a daily driven street pad due to possible elevated levels of dust and noise.

The STaSis folks had actually recommended the XP8 compounds after telling them my car info and brake kit... After they recommended the XP8, I sent them some info on the car's weight and they said "oops- the XP8 would not have been a good choice). Second, the price STaSis was quoting was over a 1/3 more than the other bids I received for the same pads.

In summary, I hope the resolution is to install the Phaeton duct to reduce the temps, and go up to the RP2 compound as recommended by Carbotech. With some luck, I'll be able to try them out in the near and report back that all is well.