Master Cylinder Upgrade?

[ItBites]

Clois,

Make sure wilwood is aware of your pedal ratio limitations (if any) when they are recommending a 1" bore master cylinder. Many of these cars do not allow a long enough pedal to achieve the 6-7:1 ratio mostly used with these types of master cylinders. In my Cobra, I have just under a 4:1 pedal ratio, which, even when combined with the smallest 5/8 bore master cylinders, results in very high pedal forces to stop the car, given the caliper piston areas I have (C4 Vette calipers).

Just make sure they really understand all the aspects of your application or you can get the "standard" recommendation for what may not be a standard application. They need at least: Pedal ratio, caliper piston areas (front and rear), rotor size. You should also give them: pad type. As I recall you should be able to develop 1200 psi or so at 76 lb of pedal force (thanks for the correction by Richard Hudgins) or something like that. You should do a little sanity check on the wilwood recommendation before you plunk down your cash...