Thread: brake booster
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Old 02-02-2004, 05:43 AM
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TonyMadrid TonyMadrid is offline
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Join Date: Apr 2003
Location: Sparrowbush, NY
Cobra Make, Engine: A&C 351W, C4
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Jerry,

I have dual wilwood master cylinders with a wilwood pedal setup with a balance bar. I find that it is hard braking and I was considering converting to a power setup. However, before I do that, once the weather warms up, I want to fine tune the system that I have. When running manual brakes it is important to have the correct pedal to rod to pivot ratio for greatest coefficiency of energy. The distance from where the MC rod attaches to the pedal to the pedal end should be 5X the distance from the pedal pivot point to where the MC attaches.

I also want to make some adjustments to the balance bar as I don't believe I am anywhere near the correct bias. Rule of thumb is 75% Fronts and 25% rears.

Regarding a power setup, with 4 wheel 11" discs, A&C recommends using a booster and MC from an "84 Vette. Using this unit will necessitate cutting a relief hole in the inner fender to allow clearance for the front of the MC. With some fiberglass material you can enclose the relief hole to prevent dirt from being flung up and onto the MC.

Also, according to Joe at A&C, if you use the '84 Vette setup, you will not need to use a proportioning valve as the vette MC has an integral proportioning valve.

Joe told me that some guys have used a booster and MC from an '87 to '89 Mercury Tracer and that it fits without having to cut the inner fender. However, Joe also informed me that they (A&C) have not tested the Tracer setup.

Tony
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