Which master cylinder are you guys running with 4 wheel disc brakes? I have a 72 GS with stock front disc, and 85 Monte SS rears. I still have original non power master for 4 wheel drums. I have a ton of drag on my fronts when I try to spin front wheels when car is jacked up. I' m thinking of going with a Wilwood master cylinder, but wondering what you guys are running. Also, this is a mid to low 10 second 3900 lb car. Thank you. Tom
I bought a 4 wheel disc master from Right Stuff and it works very well. It will stop on a dime and give you a nickel and a penny change back. It looks just like a standard front disc master but my original front disc master wouldn't apply the rear calipers enough to actually do anything.
I am no authority. But. All Corvettes after 1965 are 4 wheel disc. It seems like a master cylinder for say a 1980 Corvette should be a good fit. http://www.ebay.com/sch/i.html?_fro...0&_nkw=1980+corvette+master+cylinder&_sacat=0 Also, a lot of the early Vette's, like 1967 were not power brakes, so both are available. Mike
Pseudo related to this thread... Late in 2014 I went with a Ford 9" rear with disc on our 71 Skylark. (Front was converted to disc several years ago) The place I purchased the rear from provided few instructions for the brakes. I got everything hooked up and the rear brakes would not engage to save by butt. So I changed the proportioning valve from Summit. (Did I mention I am a automotive rookie) lol. Anyway, change the valve. Did nothing, rear would not engage to stop the car. Researched the master cylinder. Went with a corvette model as noted already in the responses. Same problem, still no rear brakes. Bleed the lines with quarts of fluid still same problem. Reached out to the company that I purchased the rear from and explained the problem. When he finally stopped laughing, he said; Steve, did you ever engage the e-Brake? just 1 time..." I said no, it's not attached. He then said I need to engage it... one time, use pliers or muscles or whatever, but the brakes need to engage once... then they will sit perfectly and work as designed. I did... they do... Sucks being a rookie sometimes. But to the point, I can mash the pedal or hold the brake a little with my other foot if desired for a much more intense spin and the rear tires will spin as needed, then while driving, car will stop as needed. Can't say I have any issues with the Corvette Master cylinder. I have not noticed any drag on the front.
