I'm trying to put together my braking system geared toward autocross but I don't quite know what to shoot for besides a 70/30 split -- or even if that is desirable for autox?

I've got stock GM calipers front and '97 Camaro calipers rear, and the split can be seen as I've calculated it in the attached shot of my spreadsheet. I'm assuming a coefficient of friction of .3 for OEM pads but that's just a ballpark that I read somewhere.

- How can I find friction coefficients for pads, especially OEM type?
- I get that bore size and pedal ratio are linked, but how do each of these affect pedal feel?
- If I do go OEM on the rears, what material would dissipate heat best?

 

Ok so I've been thinking about this plan of attack:

1) Calculate the minimum bore required to move the needed volume of fluid to the calipers -- bore area x stroke
2) Based on the bore from 1) calculate the pedal ratio needed to get a desired psi output from the master.

#2 is sort of tricky, because why would I not want as much psi output as possible and thus the largest ratio that I can get? I understand that I want my pedal to achieve a full MC stroke, and the ratio will affect that ability. Am I shooting for the largest ratio that gives me a full MC stroke?