Converting to rear disc brakes

So why couldnt I get a set of front disk brakes just like my car from a j-yard and do a transformation using thoughs brackets valves lines and so on and so forth?

umm what kind of truck?

actualy a car... Cavalier

actualy a car... Cavalier

I'd suggest getting some smaller brakes in the rear.

i remember reading some thing that said the master cylnder puts out less presure to drum and it wouldnt be enough for disc. not sure i also want to know answer to this for my altima becuse the SE comes with it and i have the cheap GXE

Originally posted by 200bodydroppedrangr



i remember reading some thing that said the master cylnder puts out less presure to drum and it wouldnt be enough for disc. not sure i also want to know answer to this for my altima becuse the SE comes with it and i have the cheap GXE

You need the proportioning valve out of the brake cylinder to make it work.

proportioning valve in a car? I'm always know for them to be on light trucks for load dependency... and i am aware of the front needing 80% of stopping powing and only 20 for the rear... but if I could just use a proportioning valve to accomedate for the need of less braking power? with less pressure in the brake line would there be enough to bring the pistion bag to it's original position or would I be dealing with some brake drag and lag issues as well?

sorry for spelling

Every vehicle with discs on the front and drums in the rear have a proprtioning valve. it can and is usually mounted on the frame or firewall. sometimes its built into the master cylinder.

the ones that are usually on trucks is a bias valve.

if you run rear disc you definitely need a disc brake proportioning valve. you can go with a stock unti off a vehicle of the same approximate weight and 4 wheel discs, or get the aftermarket adjustable valve. thats the best way, then you can adjust it to make the amount of pressure you need in the back.
speedwaymotors.com sells one. you also need smaller brakes on the rear of a car like that. many GM small cars had rear discs, so id start there at the wrecking yard first.