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Technical Brake Plumbing Question

Discussion in 'Traditional Hot Rods' started by texag09, Dec 23, 2015.

  1. Now Boys, let's try to get along. I realize it's a stressful time of year, but, lets not air our Red and White laundry in public. TEHE
     
  2. designs that work
    Joined: Aug 29, 2005
    Posts: 411

    designs that work
    Member

    As we try to get along Texag09 asked three questions. Lets forget the diagrams and answer his questions as simply as we can. My light weight car 1840 pounds has 56 f100 front brakes mid 70's Ford dual bowel master cylinder under the floor boards and early Ford rear brakes. Yes I run 10 psi residuals front and rear. No I do not run a proporsitioning valve, he may have to but he will not know that until he drives the car and does some testing in a vacant parking lot. What we have not told him is that Master cylinder bore size and brake pedal arm length or ratio are very important.
     
  3. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,396

    sunbeam
    Member

    Bendix style brakes are some what self energizing and take less pressure than disk or locked style.
     
  4. Robbie Rod
    Joined: Oct 23, 2023
    Posts: 4

    Robbie Rod

    i have my
    mast
     
  5. Robbie Rod
    Joined: Oct 23, 2023
    Posts: 4

    Robbie Rod

    hello I have an issue with my brakes, i have a 1 inch bore single master cylinder on firewall, with a wilwood paportion valve i have my lines rear are drum with a 10psi residual valve, with my front going to disk brakes, with a 2psi valve, but i still have spongy brakes, after installing new calipers new line going to front, its all pretty much brand new. I still dont know what could be wrong, I've bled and bled. Can i install a 10psi residual valve for front just to get more pressure ?
     
  6. squirrel
    Joined: Sep 23, 2004
    Posts: 59,999

    squirrel
    Member

    are the bleeders on the calipers at the top?

    A residual pressure valve should not affect pressure when you press the pedal...it just leaves a little bit of pressure in the system when you are NOT pushing the pedal, to keep the wheel cylinder seal against the bore.
     

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