Brake data logging yields surprising results

[parsonsj]

This data comes from a Stack MFR (multi-function recorder), with their brake pressure sensor. And you're right: it is expensive.



Yes, the data is plucked around points of max G, and I tried to threshold on the edge of ABS, but it was difficult with kit2. Here's a response from the manufacturer of kit1 (Wilwood... from this morning):

You're absolutely correct, the coefficient of friction on a C/SiC rotor simply isn't there. Our experience is that there is no pad that can create a Mu that matches a cast iron rotor. The problem is that C/SiC is slippery. That's one reason why all of the manufacturers that put C/SiC rotors on their cars from the factory use a 15" disc. They're really trying to create brake torque by increasing the lever length. All of these reasons are why people don't usually race on C/SiC rotors. The reduced weight is really their only benefit. If you're looking for ultimate brake torque, it's hard to beat a cast iron rotor with our Polymatrix A compound pad squeezing it.

All that being said, as you can see the C/SiC gets the car stopped with the same level of deceleration, it just takes more PSI in the caliper to get there.