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Drum / Drum brake line size

Discussion in 'The Hokey Ass Message Board' started by Jmountainjr, Nov 2, 2011.

  1. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 886


    I need some opinions on brake line size. I'm running drum / drum - Buick 12" fronts (Wilson Welding backing plates) and Ford 11" on the rear (Ford 9" rear axle). I have a drum master cylinder (Chevy '62 pickup clutch / brake combo). So far, so good. I've read conflicting information on the correct brake line size to use on a drum / drum setup like this - 3/16" or 1/4". Any fact based insight appreciated. Thanks.
  2. I used 3/16 all the way for the drum/drum setup in my 1936 Ford Truck.
    Seems to work ok. Got 2500 miles on it now.
  3. stubbsrodandcustom
    Joined: Dec 28, 2010
    Posts: 1,170

    from Spring tx

    personally i say run the same brake size... 3/16 with a proportioning valve for the rears and your good as gold
  4. The line size does not matter so much, it is pressure that does the work. Yes, you do get a small amount of fluid moving in the line, but 3/16 is fine.
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  5. 26 roadster
    Joined: Apr 21, 2008
    Posts: 2,015

    26 roadster

    used 3/16 on the last 20-30 cars with no probs, MUCH easier to bend by hand!

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