disc brake prop valve question

[moparmaniac10]

I have a 71 Challenger, it originally had front drum brakes on it. I had a 73 parts car that I took the disc brake setup off of. I even took the prop valve too. I have noticed that inline tube and right stuff are remanufacturing the brass 70-71 2 piece prop valves. Can I use this 73 prop valve or is there something I am missing here. I don't care about numbers matching as I have already taken a small block car and put a big block in it. I just wantot make sure I can use the prop valve I already have. I actually have 2 of them.

 

[challenger6pak]

As long as the 73 is a good unit, I know of no reason why you can't use it.

 

[moparleo]

The real advantage to aftermarket proportioning valves is that most allow you to manually adjust the brake pressure bias.

 

[Chryco Psycho]

Wilwood makes a 5 line adjustable prop valve now with 2 lines in & 3 out just like the facfotry ones but it is adjustable , that would be what I would use if you want to replace the prop valve you have

 

[burdar]

If you decide to replace the valve, DO NOT throw it out. The reproduction valves have had many issues. The originals are going to be hard to find.

 

[Scott19_72]

I say give the OEM piece a shot, I just finished the same swap on my 72 YESTERDAY (FINALLY!) and I hate the Willwood. The aluminum is so light it may as well be made out of butter & I'm having sealing issues. Part of that is because I went stainless on the lines and they're so rigid they're forcing tension on the threads, but still. I'm going to have to replace it right away ( its weeping on the RO side) and I wish it was tougher.

 

[moparleo]

Stainless lines have always been prone to have sealing/leaking problems because of the stiffness of the flares. Hard to seat.

 

[Scott19_72]

Word. I'm never doing that again. I haven't sworn and thrown tools in quite a while!

P.S. Inline Tube actually freakin' made my lines PRE-FLARED with the 3/8-24 fittings on the distribution block side that you need to mount a Willwood proportioning valve. Call them if you're attempting a swap with an aftermarket valve and give them sizes. They're like the Chuck Norris of brake line distributors.

 

[moparmaniac10]

Looks like i'm using the 73 prop valve. Too many issues going aftermarket. Thanks guys.

 

[azmoparboy]

I too have had troubles with the after market valve as well. I get an old one off of ebay for $100, then I rebuilt it as good as I could with O-rings from a guy, http://www.MuscleCarResearch.com/, +1 (571) 262-1612. So far so good with the overhaul on the valve. When I did the overhaul, the inside was very dirty. This guys web site is a great help. He has "how to's" as well on his site. Take a look at it, the valve is not that hard to work on. Good Luck

 

[72barracuda]

I have the same situation. I have not been able to find a replacement for the OEM prop valve, inline tube suggested I try to make the old one work. All my new stainless lines are designed around the stock '73 system. Has anyone tried to use one of the GM prop valves?

 

[Chryco Psycho]

Willwood makes a 5 line adjustable prop valve , I would have used it in my car if i had known about it at that time

 

[jeffv21]

I would be interested in buying the other, if it is not pitted inside. Thanks

 

[Yatzee]

OE prop valve will work just fine. If your ambitious you can disassemble it to inspect for cleanliness. to check the
valve for proper operation put a test light on the terminals in static condition. If the bulb lights it's stuck internally.
Pics are online, just Google ( or whatever ) "proportioning valve" images.

 

[azmoparboy]

I know this thread is a little old but this is a very hard item to get. I know one of you guys need this, it's a NOS 73/74 B/E proportional valve, new on eBay. If I needed this valve I'd buy it myself biut don't. Hope this helps one of my fellow E body lovers