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dual port master

Discussion in 'The Hokey Ass Message Board' started by Big Khaunaa, Oct 13, 2010.

  1. Big Khaunaa
    Joined: Sep 1, 2008
    Posts: 217

    Big Khaunaa
    Member

    i need to find a dual port master desinged for a car with power brakes and 4 wheel drum brakes anyone have any ideas thanks guys
     
  2. Late 60's early 70's Chevy's with your description will work. Like 69 Chevelle, Nova, Camaro with all drum power brakes.
     
  3. krylon32
    Joined: Jan 29, 2006
    Posts: 6,185

    krylon32
    Alliance Vendor
    from Nebraska

    You really need to check to get the right diameter for each seperate installation as they are different.
     
  4. Double Caddy
    Joined: Feb 2, 2009
    Posts: 689

    Double Caddy
    Member
    from virginia

    I used a dualport M/C and power booster from Pirate Jacks for my Caddy with drums all around. Really good customer service.
     
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  5. Cabbage
    Joined: Apr 17, 2006
    Posts: 728

    Cabbage
    Member
    1. S.F.C.C.

    i agree witk krylon, dogpatch just installed a 1 1/8 bore and its like a rock, being resleeved to smaller size now.
     
  6. Big Khaunaa
    Joined: Sep 1, 2008
    Posts: 217

    Big Khaunaa
    Member

    the car is a 58 edsel that someone put a boster on with what looks like a vete master the car has a very hard brake pedel with very little movement a guy from mp brakes told me the master bore is to big
     
  7. Have you taken it off to see what bore it is ?
     
  8. Big Khaunaa
    Joined: Sep 1, 2008
    Posts: 217

    Big Khaunaa
    Member

  9. ECIGUY
    Joined: Feb 24, 2009
    Posts: 111

    ECIGUY
    Member

    Take a read on our reply to matt2491 on his corvette m/cyl. it also applies to your problem.
     
  10. Big Khaunaa
    Joined: Sep 1, 2008
    Posts: 217

    Big Khaunaa
    Member


    woldnt the need of a rpv give a pedel you need to pump
     
  11. Thats why its so hard. General rule 1" bore for manual brakes and 1 1/8" bore for power brakes.
     
  12. edsel.fi
    Joined: Sep 7, 2008
    Posts: 242

    edsel.fi
    Member

    power brakes always do have smaller diamter bore....
     
  13. 53sled
    Joined: Jul 5, 2005
    Posts: 5,819

    53sled
    Member
    from KCMO


    Perhaps something was lost in translation, or its a metric thing. But by the 60s, the automakers all settled on 1" manual or 1 1/8" power master cylinders. Then the cars got smaller and all the rules changed. But for what we do, this is a good start.
     
  14. Cabbage
    Joined: Apr 17, 2006
    Posts: 728

    Cabbage
    Member
    1. S.F.C.C.

    I may be wrong and im no rocket scientist ;) but i think its the opposite, manual brakes have the smaller bore
     
  15. Lotek_Racing
    Joined: Sep 6, 2006
    Posts: 690

    Lotek_Racing
    Member

    Yup, the smaller bore gives more line pressure but less volume.

    I could post up the math on the hydraulic principles involved but it's morning and I have to go to work.

    Try google if you need more info. I found some really good stuff on a couple of the aftermarket brake company websites.

    Shawn
     

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