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Brake proportioning valves

Discussion in 'Modified Alpine' started by phyrman, May 23, 2020.

  1. phyrman

    phyrman SAOCA Secretary Diamond Level Sponsor

    Who here has installed a proportioning valve with upgraded disc brakes?
    Pros & cons if any?

  2. Toyanvil

    Toyanvil Gold Level Sponsor

  3. phyrman

    phyrman SAOCA Secretary Diamond Level Sponsor

    Cool thanks John.
    Now answer your phone!!!! LOL
  4. Bill Blue

    Bill Blue Diamond Level Sponsor

    Not really any pros and cons. If your system can experience premature rear wheel lockup, they are a potential life saving necessity. Get one. If your system does not have the lockup problem, they are a waste of money.

  5. Barry

    Barry Platinum Level Sponsor

    FWIW, an adjustable proportioning valve can also be used to address excessive front brake lockup. Probably not an issue with a stock Series Alpine brake system, but upgrading the front calipers could result in too much of a good thing.
  6. Charles Johns

    Charles Johns Platinum Level Sponsor

    I have a prop-valve in case I need it, but many don't if a dual chamber master system. My 65 Mustang was changed to front discs and a dual chamber master, and did not need a proportioning valve.
  7. Bill Blue

    Bill Blue Diamond Level Sponsor

    My original disc brake system, with 10" rotors in front with 2 3/8" gm metric calipers and Saturn rear brakes had a proportioning valve, but was quickly removed as it was not needed. Phase two brakes, with 11" rotors and 2 1/2" gm metric calipers and 2007 Miata rear calipers has a proportioning valve, cranked up about 50% because it is very much needed.

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