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Thread: ABS delete, with or without bias valve?

  1. #1
    Guest hayell's Avatar
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    ABS delete, with or without bias valve?

    I'm going to doing an ABS delete on my S14 as its shot, but I just wanted to see if anyone had doen one and if so did they do it with or without a bias valve and what would you recommend?

    Thanks,
    H

  2. #2
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    No need for bias valve, works fine without. I just made my own lines up and added a T piece just after bmc for fronts


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  3. #3
    Guest immy21's Avatar
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    Without

    Unless you lock out the stock bias valve, which your not doing by just getting rid of ABS.

  4. #4
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    Quote Originally Posted by immy21 View Post
    Without

    Unless you lock out the stock bias valve, which your not doing by just getting rid of ABS.
    I didnt know there was a stock bias valve. where is it located?

  5. #5
    Guest immy21's Avatar
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    If bmc has External bias valve will be attached to the bottom bmc (iirc), rear line wil be attached to it.

    If bmc has internal bias valve, the rear brake line attaches to side of bmc

    S15r, z32 skyline etc have internal valve, can't remember on s14.

    Remove the sticker on end of bmc to reveal Allan bolt, shim the spring to increase rear pressure knee point or to lock it out and add an aftermarket bias valve. My assorted metric copper washer set had the correct size.
    Bmc needs bench bled after.

    I done this to my old s14a (z32 bmc) with willwood screw bias valve, abs removed
    Also done it to my current s15r (stock bmc) with Tilton lever bias valve and retained abs

    Last edited by immy21; 21-06-2018 at 12:54.

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