Originally Posted by bkleeman

^ what he said.

I nearly lost the car at Long Beach this weekend to this exact problem. The fluid boils and you have no pedal. For 10 laps everything was good, then I had 2 soft stops and then it was *gone*.

Well routed ducting is what you need. Duct intakes that are inside the frame rails have to make too many turns to get good airflow to the brakes - you need something that starts outside the frame rails (requires cutting holes in the front facia) or comes in from underneath the car.