Just lucky I guess.
It's not as rare are you think. There are 4 fixed calipers and 275mm/335mm of R compound that will pull more G's than most sports cars. It stresses everything. I bet a 10 psi residual out back will fix it, I'm just worried about excess heat. I've also considered doing springs behind the caliper pistons like they did in the old days. Wilwood claims it won't work, but I don't think they want the liability of telling me to mod my calipers. The other alternative is a floating rear end. Power brakes with a larger piston would help dramatically but I don't make enough vaccum. A hydraboost unit would also allow a bigger piston and would help dramtically but I like manual brakes on the race track. I know how to fix it, it's just at what compromise and how much money I want to spend.
