This past weekend at Buttonwillow we were boiling the fluid after halfway into our hotlap. The problem has gotten worse and we attribute that to the pads getting thinner and transfering more heat into to the piston/fluid quicker. We're just about at the end of our useable life of the Hawk HT-10's now.
We built ducting on our MR2 which helped with the fade. Scott, did the ducting solve your brake fade? And do you have some more pictures of how they did it?