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| Proportioning valve identification https://slantsix.org/forum/viewtopic.php?t=10292 |
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| Author: | textoad [ Wed Sep 01, 2004 7:59 am ] |
| Post subject: | Proportioning valve identification |
After reading all about proportioning valves on this site I set off to pull a stock one from the JY yesterday. I like the idea of a direct swap. I don't have good skills at flare fittings. I got one from a '74 Valiant. My car is a '74 Scamp that I'm doing the disc brake conversion on, amongst other things. Anyways. I pulled a prop valve from a 4 door car, mine is a 2 door. Are the prop valves the same from 2 door to 4 door being the 4 door is heavier? The only numbers on the prop valve are some patent numbers. There are 2 numbers on the valve and 2 more on the bracket. There is also a number 5 stamped on the valve. Any idea how to tell what I've got? I pulled it because it was the only one in this yard that looked good. It has a different shape than my stock one. Got it cheap. I don't know for sure the donor had discs because the brakes and spindles were gone. Also the master cylinder was gone but the barke lines to the master cylinder were in a position that looks like it had a booster. I pulled the fender tag numbers as follows. E24 D34 VP41 C5R 262944 Sorry so long. Thanks. |
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| Author: | slafolle [ Fri Sep 03, 2004 10:36 pm ] |
| Post subject: | |
I'm no expert, but as I understand it: prop valves are the same for 2- and 4-door. The weight difference is not an issue. However, you'll need a prop valve from a disc car only, as the hydralic proportioning is set up differently than for a car with drums. If your donor car had the spindles gone, there's a good chance that it had discs. There's a fender tag decoder at: http://www.mymopar.com/tools.htm You'll have to download it for the 1969-1974 version. That might confirm if your donor was disky. Good plan, grabbing the brake lines to avoid having to make and flare them. That's save you some time. Steve |
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| Author: | kesteb [ Sat Sep 04, 2004 2:05 pm ] |
| Post subject: | |
When I bought my first disk brake setup, the person that I bought them from suggested that the best proportioning valve was from a '73 A-body. He had tried several differant ones, from diffreant years, include 1/2 ton trucks, and this one worked the best. I have one in my '65 and the braking is smooth and straight with no lockups. |
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| Author: | Marc [ Thu Sep 16, 2004 7:58 am ] |
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FWIW, I used a prop valve off an Aspen on my 65 Barracuda when I did the disc brake conversion. It has worked perfectly for over 100,000 miles. It is always a crap shoot with JY parts anyway! I had to replumb mine because it had the old single piston master cylinder and I also added a power booster. |
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