Which master cylinder?
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  1. #1
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    Which master cylinder?

    Having some trouble with my brakes, and being fairly new to hot rods I'm after some advice on what master cylinder I can replace my current one with and where's best to get one from. I'm in Devon U.K.

    I have a 47 ford running camaro front end with disks and camaro rear end with drum.



    Thanks guys, any help appreciated

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    Official RnS Addict brading's Avatar
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    I would fit a Camaro one like for like think. See if there are some numbers on the cylinder then have a word with these people.

    US Automotive

    What sort of problems are you having with the brakes.

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    Official RnS Addict brading's Avatar
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    If you do get a new master cylinder it would be worth a read of this before fitting it.

    How To Bench Bleed A Master Cylinder

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  6. #4
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    The brakes are intermittently failing completely. Haven't been able to test much but seems to happen more when doing small manoeuvres. That may be just coincidence.
    Pedal goes almost right to the floor then 1-10 pushes later all of a sudden they are fine again. Everything was replaced before I imported it and I've bled and removed a fair amount of air yesterday and checked all lines.
    I've just got to pressume it's a faulty new master cylinder. Any other ideas?

  7. #5
    Off the Xmas card list kapri's Avatar
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    You have to mess about with that pin sticking out the proportioning valve block under the m/c .From memory it centralises some form of shuttle in there and if it's not in the correct place you lose line pressure. Personally I never use any form of proportioning valve .

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    Gym Junkie chrisvs's Avatar
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    Might not be the master cylinder, could be a faulty connector, the shiny connector on the distribution block doesn't look right to me.
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  9. #7
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    So to test whether the proportioning valve is the issue I could just by pass it right?

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    Off the Xmas card list kapri's Avatar
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    I would anyway , they are designed for their specific application generally .

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    Rods 'n' Sods Junkie evildave's Avatar
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    You may still have the drum/drum valve. Best solution is to fit a disc/drum master cylinder and do away with the valve completely. When testing if the rears lock up before the fronts you can add a single proportioning valve into the rear line only.

    Or you could get a disc/drum proportioning valve.

    Also with the 'pin' it's sometimes easy to bleed the system using a vacuum at the caliper/drum end rather than pumping the pedal. If you do use the pedal you have to go really slow.

    I've had loads of brake problems!
    nothing to see here.............move along................move along

  12. #10
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    Gonna try removing and bypassing the proportioning valve tomorrow in the hope that that solves the intermittent complete loss of pressure, then I can move on from there.. Wish me luck

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