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Technical What Dual Master Cylinder ?

Discussion in 'The Hokey Ass Message Board' started by lake_harley, Jan 28, 2019.

  1. lake_harley
    Joined: Jun 4, 2017
    Posts: 1,057

    lake_harley
    Member

    What is a relatively compact dual master cylinder to use for an under floor mounted master cylinder? I plan to build a mount for my '31 Coupe and intend to duplicate the pivot position and height of stock Model A pedals so the pedals come through the floor and work basically the same as stock. Obviously, I don't want the brake master cylinder lid to interfere with the floorboards. For my clutch, I plan to use a compact Wilwood or CNC master cylinder and don't expect any clearance problems. Speedway's dual brake master cylinder just looks quite tall, and another supplier's "Corvette" MC looks quite large as well, so I wanted to get some options based on what others have used.

    Thanks, in advance.

    Lynn
     
  2. Don't use a dual.
     
  3. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    I'm running a 67/8 mustang for my 40 drum brake setup.
     
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  4. 1oldtimer
    Joined: Aug 21, 2003
    Posts: 7,491

    1oldtimer
    ALLIANCE MEMBER

    I'm using a American Motors 1976-63, Jeep 1975-66 1" bore. One of the few that had right side ports. I made an adapter to the '39 pedals for my '28 Tudor.

    [​IMG]
     
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  5. lake_harley
    Joined: Jun 4, 2017
    Posts: 1,057

    lake_harley
    Member

    That '67/8 Mustang MC looks quite compact. Did you use the manual brake version with the 1" bore? Since I envision my bracket/pedal setup will have the brake rod push to the rear of the car with the MC behind the pedals, the outlets appear they would face toward the center of the car, and that would be perfect. I'd imagine in the stock Mustang location it would have been a firewall mount and the lines would have connected on the outward side of the MC?

    I'm curious, 1927graham, why not a dual MC? I clicked on your build link hoping to find what you used on your pickup, but didn't see a MC mentioned during my really quick scan.

    Thanks!

    Lynn
     
    Last edited: Jan 28, 2019
  6. Gasolinefed
    Joined: Apr 17, 2018
    Posts: 105

    Gasolinefed
    Member
    from OR

    I don’t know if the size is right but I usually run a 69 nova drum drum master.. 1” bore..

    But my cars aren’t known for there stellar brakes

    Edit - I’ve got one in my 29 and pedal pressure is the concern..
     
    Last edited: Mar 11, 2019
  7. s55mercury66
    Joined: Jul 6, 2009
    Posts: 3,980

    s55mercury66
    Member
    from SW Wyoming

    I need to file that away for future use. It looks like a mirror image to the '67 Mustang 1".
     
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  8. lumpy 63
    Joined: Aug 2, 2010
    Posts: 1,304

    lumpy 63
    Member

    I'm using the jeep master on my stude Its mounted under the floor so I removed the residual pressure valve's from the master and installed in line valves. 2lbs for the front discs and 10lbs for the rear drums...Stops like a charm.
     
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  9. 1oldtimer
    Joined: Aug 21, 2003
    Posts: 7,491

    1oldtimer
    ALLIANCE MEMBER

    I also used it on my girlfriends '60 Lark wagon.
     
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  10. butch27
    Joined: Dec 10, 2004
    Posts: 2,831

    butch27
    Member

    I 'm using a Dodge truck..Under the floor. and made a remote fill for it to fill under the seat..
     
  11. AMC360
    Joined: Jul 24, 2007
    Posts: 76

    AMC360
    Member
    from Canada

  12. RacingRoger
    Joined: Sep 11, 2017
    Posts: 196

    RacingRoger
    Member

    Why not use a dual? Just curious....
     
  13. Hey, I'm from Northeast, IN.
     
  14. 29moonshine
    Joined: Dec 30, 2006
    Posts: 1,294

    29moonshine
    Member

    I used a 67 nova on my 29 chevy stops good
     

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