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Proportion valve on an SN95

Discussion in 'Non-Turbo Tech questions' started by BoostedGT, Jun 26, 2008.

  1. BoostedGT

    Joined:
    Feb 6, 2003
    Hey guys,
    I did some searching through various threads on here to try and find the answer to my braking question but didn't have much luck. Right now I am trying to spool the turbo up with the footbrake to "stage" the car instead of just rolling into the beams and sitting on the transbrake. My question is, I can get right at about 1 to 2 psi on the gauge and I start sliding the front tires. I've always known about proportioning valves and how they can limit the brake pressure to the front or increase the pressure to the back. My question is, how can I use this manual proportioning valve to achieve what I'm trying to do? I have stock sn-95 brakes on the car with the ABS removed. Do I need to put the valve on the front brake lines to "limit" the pressure going to them or do I put the valve on the rear brake line to "increase" the pressure going back there? I know on fox body cars there is a fitting on the passenger side firewall that most people put the valve on... Where would I put it on this sn95? Thanks for any help you can provide.

    -Chris
     
    BoostedGT, Jun 26, 2008
    #1

  2. TT_05_Stang

    Joined:
    Jan 13, 2005
    Wouldnt that get a little hairs when the back slides out breaking at the end of a run?

    Will
     
    TT_05_Stang, Jun 26, 2008
    #2

  3. BoostedGT

    Joined:
    Feb 6, 2003
    I guess it could. My thought was that the larger width of the tire out back would be less apt to lock up versus the skinny tires up front. You could be right and yeah that would suck majorly!
     
    BoostedGT, Jun 26, 2008
    #3

  4. TryingtoLearn

    Joined:
    Feb 4, 2008
    Sorry if I missed something, but why not just use a line lock?
     
    TryingtoLearn, Jun 26, 2008
    #4

  5. BoostedGT

    Joined:
    Feb 6, 2003
    I have a linelock... I use it for a burnout, but staging the car wouldn't exactly work very well. It is sliding the front tires.
     
    BoostedGT, Jun 26, 2008
    #5

  6. BigTurboNotch

    Joined:
    May 4, 2006
    id also like to know whether to put it in front or rear, mines ready to be installed just need to know where.
     
    BigTurboNotch, Jun 26, 2008
    #6

  7. BoostedGT

    Joined:
    Feb 6, 2003
    Yup hehe.. I have mine sitting there down at the shop.
     
    BoostedGT, Jun 27, 2008
    #7

  8. Gen1SVE

    Joined:
    Sep 13, 2006
    The prop valve goes in the rear brake line to adjust the pressure to the rear brakes. Also try a 3 step while rolling into the staging lanes. It will limit the RPM and give you more boost, whyle limiting the rpm's which want to push the car forwad. Set up the next step for the trans brake after you are staged. With the boost on deck from the first step your car should build boost alot faster.
     
    Gen1SVE, Jun 27, 2008
    #8

  9. BoostedGT

    Joined:
    Feb 6, 2003
    I guess I need to get a box with a 3-step... >:(
     
    BoostedGT, Jun 30, 2008
    #9

  10. cobrasan

    Joined:
    Mar 12, 2006
    with all this talk of putting it in the front or rear does this thread belong on the after dark forum?
     
    cobrasan, Jun 30, 2008
    #10
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