Quote:
Originally Posted by CSG Mike
830F is what your rotor temps stabilized at. When you're braking, you're putting a huge heat impulse into the surfaces of your pads and rotors, which then dissipates via conduction into the pad/caliper/fluid, and the rest of the rotor.
This is why you see race cars get glowing brakes when they're stopping, and then the glowing disappears quickly; the heat is being sunk into the rest of the setup. The brakes are not really cooling from 1500F+ to under 800F that quickly.
If your equilibrium temps are that high, you need a BBK. You don't want your caliper getting over 250 or so, or you start rapidly fatiguing the metalurgy, and will eventually suffer a catastrophic failure.
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Mike, I love reading your posts. We've never met, but as far as I can tell, you're experienced with these cars.
I can't get rid of this nagging feeling, though. I have a couple friends that I was at the track with, both of which said with great confidence that I don't need a BBK. One rode with me and knows me very well. He was a pro racer at one point and I trust his judgement. The other is a national champion autocrosser and maybe fender to fender national champ as well. He owns a BRZ and has built several. He also said with confidence there's no need for a BBK. Does this surprise you?
I feel like this has been discussed ad nauseam, but can't stop thinking about it.
I'd love to hear what others have to say on this.