Topic: Brake rotors that don't sh*t the bed?
I'm looking for *cost effective* recommendations on brake rotors that can get past a weekend without giving you the warped wiggle jiggle every time you stomp on the no-fast pedal. The current setup is a 2004 Mini Cooper, Porterfield ST-43 pads (front and rear and they are the sh*t!), brake coolers routed to the front rotors (the cooling is ported to the inside face of the rotor), Motul RBF 600 brake fluid (also the sh*t), changed regularly. The car is mostly stock (including the brakes), I am guessing 2800 lbs ish. Direzza 3 tires, 205x50R15.
The first set of rotors used were Brembo and the fronts were giving the warped shimmy partway through the third day of racing. I replaced the those before the next days race with something from a nearby parts store (Raybestos I think) and those they were giving the warped jiggle before the end of the day. I've been running solid non-slotted, non cross drilled rotors as I haven't had much luck with those in the past (and the car has plenty of brake cooling so not convinced those will do anything other than making us delinquents look fast which would be lying).
According to the ST-43 spec sheet it is my understanding the brake pads like to run at a higher temp, could it be there is too much cooling on the inner face of the rotor from the coolers and the constant cycling of heat/cooling causing this? I will add that before I race on the pads I make sure to go out and bed the brakes to the rotors by completing progressively aggressive brake stomps from 65 mph to about 5 mph, then repeat ~8 times.
Anyways, I know there are some brake experts out there so any insight would be rewarded with a high five and an almost guarantee we will lose to you at the next race. See you rascals at Gingerman!