brake proportion valve

[Lunar-tic]

Stupid question, I am converting to front disk brakes and am compiling a list of necessary parts. I currently have the dual reservoir MC. Why would I need a proportioning valve if that MC feeds the front and rear independently?

Thanks

Bill

 

[knack]

I installed a '76 disk brake front end in my '70 model with manual master cylinder (actually I've done this twice - once many years ago) and didn't use a proportioning valve either time. No problems. Front and rear seem pretty well balanced.
I'd try it first and see how it works out.

 

[rwill]

brake

x2 on what knack said

 

[chrlsful]

once n awhile a resudial valve is needed. R U disc/disc or keepin the drum in back? what sz (equal) R the 2 resevours, sometimes the disc 1 needs to B bigger.
Good Luck w/the project. Testing seems to wrk best w/adaptation when needed. Let us know how it goes as U proceed.

 

[broncnaz]

X3 most people dont need a prop valv on there conversion. The only time you need a prop valve is if the rear brakes lock up before the front brakes do. If you want or need one I have a brand new prop valve that I didnt use on my disc conversion. I'd let it go for about 1/2 price.

 

[Lunar-tic]

Thanks guys, I appreciate the info. Broncnaz, I'll let you know about the valve. I can't wait to get discs in the front. The thing drives like a tractor now, I can make a hard right just by stomping the brakes.

 

[DirtDonk]

Another thing the prop valves have (some anyway) is a delay valve built into the fronts, to let the rears come in a little quicker, though at their lower pressure.

But x4 on what they all said. I didn't even swap master cylinders on my '71. Still using the stock one and it works fantastic. Pulled the residual pressure valve out of the front system of course, but other than that, it's stock.

Paul