Proportioning Valve

[1949P17BC]

I think I spelled it right. Disc brake conversion on the 47, drum in the rear, orginal master cylinder rebuilt and resleeved. What size valve and where would you buy one???

[greg g]

most of the street rod suppliers have them. Do you need one? HAve you tried the set up without it? Rear brakes locking up prematurely?

[claybill]

i think they are 60 bucks from ot rod houses...but it is nuthin but a piece of aluminum with 4 holes and a brass nut. what a rip!..

i have one here rollin around someplace. no instructions with it. as they usually come with the disc kit.

bill

[claybill]

that's right...for power brakes.

bill

[Joe Flanagan]

I got mine from Jegs. 2 pounds goes to the front, 10 to the rear. I understand they are used because the master cylinder is lower than the brake cylinders and this keeps pressure in the lines so you don't have a lot of pedal travel before the brakes engage. Of course, I could be all wet on this. It wouldn't be the first time. Here's a picture of my setup. Thanks to Don Coatney for his guidance. In fact, Don has a much better picture than mine.

[1949P17BC]

So, do I need a proportioning or a residual valve 2 & 10.. I need them because I have a low peddle

[martybose]

You only need the residual valves if you do not have "power" brakes.

That's only true if you can make the assumption that all power brakes have built-in residual valves, which I seriously doubt.

Marty