‘71 Charger Proportioning Valve

Brakes, Steering & Suspension

  1. 71SandbugCharger

    71SandbugCharger FBBO Gold Member FBBO Gold Member

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    Original setup in my ‘71 Charger was drums all around, and now I’m doing disc up front and drums in the year.
    I’m upgrading the booster, but do I need to update the proportioning valve?

    How do I clean it and restore it if I can re-use it?

    Thanks always!

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  2. T2R9

    T2R9 FBBO Gold Member FBBO Gold Member

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    • Thanks! Thanks! x 1
    • moes

      moes Well-Known Member

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      when adding disc up front, no upgrade needed to the factory proportioning valve. Just ad an adjustable brake valve to the rear brake line like T2R9 said. Then go to a big parking lot with out a lot of cars and make some hard braking stops, if the front dips very hard when braking adjust the rear valve so you have more rear braking till you have a good feel between front and rear brakes. You always want the front brakes (75 %) to come on first before the rear brakes (25 %) approximately. To much rear braking and you will have the car sideway before you know it. I did the same procedure when I added discs to my 70 Sport Satellite and the brakes work great now!! It took a few try's at stopping to get the rear valve adjusted right.


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      Last edited: Jun 11, 2021
      • Thanks! Thanks! x 1
      • Floyd

        Floyd Well-Known Member

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        If you want to go with original parts, there are a couple options for rebuilding. Do it yourself or send it to B&E Warehouse in MN: https://brakeandequipment.com/. B&E are great to work with and reasonably priced.

        Either way, the replacement parts will come from here: https://www.musclecarresearch.com/mopar-parts. There is a lot of great info/how-to on that website, you just need to dig through lots of info.

        Can’t speak to the additional parts required or if you’ll need a different p-valve (I think you will)
         
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        • Jc cooper

          Jc cooper Second gear fun! FBBO Gold Member

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          If not mistaken, on an all drum car no factory proportioning valve , what you have pictured is the oem distribution block , so you may have need for a proportion valve!Thats how I see it !
           
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