I just did the front disc swap on my 70 maverick, rear drums, Im also doing the Biondo line lock, my question is do I need to replaced the brake proportioning valve? Car was all 4 drums before. Looking for ideas. Thanks
It depends. The prop valve keeps the rear wheels from locking up before the fronts. With stock or near stock rear wheels/tires lockup could be a problem when changing to disc/drum setup. With bigger, heavier rear tires and wheels they often have enough inertia to keep from locking up and a prop valve isn't needed. I changed to discs in the front, too. In my car with 15X8 wheels and 255 60 15 tires on the rear it's not a problem. When I had smaller wheels and tires on the rear I would sometimes notice the rear braking harder than the front.
the race shop that did the specs on my disc/disc setup said no prop valve was need as Barry said. they said the larger rear tires would be the bias for the system......
