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Thread: brake master cylinder options

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    brake master cylinder options

    Hello guys need a bit of advice Ive fitted 350z brakes on my s14 its very front biased under braking I ve bought an proportioning valve and plumbed it in to the cabin. But the brake master cylinder on the s 14 is has an internal proportioning valve so my question is what brake master cylinder would work well and has an external proportion valve so I can remove it and just have the prop valve in the cabin

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    i ran 350z brembos with standard cylinder and rear brakes and the bias seemed fine. eventually upgraded to r34 rear brembos too and a bm57 master cylinder and its spot on

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    does this work with a stock brake servo?

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    on mine the fronts lock way to early what tyres do you run? do you still have abs?

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    I might be wrong but the 260-13621 has only 1 out put I dont want to have to re do all the lines I have just made I found this from willwood https://www.hinsonsupercars.com/p-12...the-240sx.aspx
    i think it has front and rear out puts

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    kept the standard servo and the abs

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    the bm57 is a tried and tested route

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    Try locking out the stock bias first, all it will cost you is time and some cheap brake fluid, put good stuff in once your happy with the setup.
    What rear calipers have you got?
    What front and rear pads?

    http://sxoc.com/vbb/showthread.php?5...out-bias-valve

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    Quote Originally Posted by immy21 View Post
    Try locking out the stock bias first, all it will cost you is time and some cheap brake fluid, put good stuff in once your happy with the setup.
    What rear calipers have you got?
    What front and rear pads?

    http://sxoc.com/vbb/showthread.php?5...out-bias-valve
    thank you this is exactly what I was looking for, looked for ages b 4 I posted, the sticker blends in with the casting have tons of brake fluid will be bench bleeding tomorrow then bleed the rest of the car

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    Quote Originally Posted by mikeyrs View Post
    the bm57 is a tried and tested route
    was thinking bout bm57 but going to try to remove stock bias Ive already removed abs made new hard lines and pumbed in to the cabin where Ive got a prop valve going to the rear

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    Quote Originally Posted by immy21 View Post
    Try locking out the stock bias first, all it will cost you is time and some cheap brake fluid, put good stuff in once your happy with the setup.
    What rear calipers have you got?
    What front and rear pads?

    http://sxoc.com/vbb/showthread.php?5...out-bias-valve
    Ive got standard rear callipers I think they are ferodos but I am not sure its a track car it will have 2500s on f and rear b 4 it goes on track
    do I need to revove the spring an shim the difference thats how I would imagine it to work?

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    Quote Originally Posted by marklee77 View Post
    Ive got standard rear callipers I think they are ferodos but I am not sure its a track car it will have 2500s on f and rear b 4 it goes on track
    do I need to revove the spring an shim the difference thats how I would imagine it to work?
    I leave the spring in, add washers between the bolt and spring until the bolt won't fully seat, then remove one shim and your good. iirc 4 shims meant the bolt wouldn't fully seat so for me 3 shims was good. Carefull not to damage threads when putting bolt back in as the spring tension will be strong.

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    Quote Originally Posted by immy21 View Post
    I leave the spring in, add washers between the bolt and spring until the bolt won't fully seat, then remove one shim and your good. iirc 4 shims meant the bolt wouldn't fully seat so for me 3 shims was good. Carefull not to damage threads when putting bolt back in as the spring tension will be strong.
    cool thank you where did you get your shims?

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    Quote Originally Posted by marklee77 View Post
    cool thank you where did you get your shims?
    They are copper washers out of my assorted metric copper washer set, can't remember what size I used.

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    Quote Originally Posted by immy21 View Post
    They are copper washers out of my assorted metric copper washer set, can't remember what size I used.
    ok to halfords it is then

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    one last question hopefully it ll b done tomorrow what end did you shim? closest to the servo or front of the car?

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    Front of the car
    I put the washers between the bolt and spring.

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    got this sorted today went to a pals house he machined a bar on the lathe and its all back in the car just wanted to say thank you for you help

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