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Need help choosing a proportioning valve for rear discs

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Old 03 May 2014, 04:21 PM
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bflan2001
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Default Need help choosing a proportioning valve for rear discs

I'm trying to figure out which valve I need and the information currently floating around the web is sketchy at best. I have an '02 Forester with rear drums and ABS. I bought a 2.5RS rear end and some Legacy GT calipers and rotors. Some people say I need a proportioning valve from a WRX, some say it has to be from a Forester, others say it has to be from a Legacy GT. In addition to the model, I also need to know whether the proportioning valve needs to be from an ABS model or not.

I noticed several people referring to both the master cylinder and the ABS pump as the proportioning valve, which is probably why good information has been so hard to find. I am talking about the actual proportioning valve that sits on the passenger side front strut tower, and controls brake fluid pressure between the front and rear axles.
Old 03 May 2014, 04:28 PM
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JGlanzaV
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Can you not get a manual brake bias valve and set it up how you like?
Old 03 May 2014, 04:36 PM
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I could but I'm trying to avoid replacing the hard lines as I do not have the tools to bend new lines and having a shop do it would be expensive. I'm looking for a stock proportioning valve that will bolt up to the existing hard lines.
Old 03 May 2014, 04:39 PM
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JGlanzaV
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The tools are about $35 off of ebay so it might save you a load of hassle
Old 03 May 2014, 04:50 PM
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bflan2001
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I wouldn't mind having an adjustable valve but it seems like a lot more work. Have you done it before? I have no experience bending brake lines but it seems like between the tool, the materials, and the labor involved it is a big investment compared to just swapping in the proper stock valve. Especially since I would likely mess up on my first attempt and would end up doing the job twice. If it's not as difficult as I'm thinking maybe I will go that route.
Old 03 May 2014, 05:11 PM
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bflan2001
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I just did a little searching for a manual valve, there are so many different sizes and options I have no idea where to begin. Wilwood makes 7 different valves.
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