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Thread: stock FPR

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    the BOSS of jellow supporter Feedback Score 0 a2j's Avatar
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    stock FPR

    does it need to know the intake manifold pressure? should I leave the vac hose connected? top part of my firewall is pretty clean now...
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    Better than that "other" place Not Verified Feedback Score 2 (100%) x2xtreme360's Avatar
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    Yes, but you don't need the crap solenoid it routes to. That's only used for hot starts. Send the line straight to the font plenum port by the throttle body.

    Vacuum reduction, Powdercoated misc, cruise relocate, Evo9 BOV, Custom catch cans, Russell fuel filter, SS braided fuel lines, High flow fuel loop, Autogage fuel gauge, Catless DP, DNP Y-pipe, Fuel pump hotwire.

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    Forum User Not Verified Feedback Score 4 (100%) TUFFTR's Avatar
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    xtreame360 - could you elaborate on any more info you know on this? why does the TT need a solenoid for hot starts but the NA's dont? very strange.

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    I AM IMPORT POWER Feedback Score 1 (100%)
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    Quote Originally Posted by a2j View Post
    does it need to know the intake manifold pressure? should I leave the vac hose connected? top part of my firewall is pretty clean now...
    Yes, the FPR is a 1:1 rise FPR. For every 1psi manifold pressure the FPR rises 1psi. Without a vac/boost reference your fuel pressure will not rise and you will not have the fuel you need.

    -Chris

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    Better than that "other" place Not Verified Feedback Score 2 (100%) x2xtreme360's Avatar
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    Quote Originally Posted by TUFFTR View Post
    xtreame360 - could you elaborate on any more info you know on this? why does the TT need a solenoid for hot starts but the NA's dont? very strange.
    The solenoid is supposed to dump fuel or lean it out (can't remember which one) for hot starts. You don't need it though.

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    the BOSS of jellow supporter Feedback Score 0 a2j's Avatar
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    Quote Originally Posted by Ninja Performance View Post
    Yes, the FPR is a 1:1 rise FPR. For every 1psi manifold pressure the FPR rises 1psi. Without a vac/boost reference your fuel pressure will not rise and you will not have the fuel you need.

    -Chris
    yes, this sounds familiar, that is why I was asking. does this apply also for the aftermarket AFPR?

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    Quote Originally Posted by TUFFTR View Post
    xtreame360 - could you elaborate on any more info you know on this? why does the TT need a solenoid for hot starts but the NA's dont? very strange.
    It is actually for warm starts not hot. And you can remove it. I have never seen a negative effect from removing it.

    -Chris

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    Quote Originally Posted by a2j View Post
    yes, this sounds familiar, that is why I was asking. does this apply also for the aftermarket AFPR?
    Yes, and for the same reason.

    -Chris

  9. #9
    the BOSS of jellow supporter Feedback Score 0 a2j's Avatar
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    Quote Originally Posted by Ninja Performance View Post
    It is actually for warm starts not hot. And you can remove it. I have never seen a negative effect from removing it.

    -Chris
    so, without it, I should not have problem staring in cold/hot with e85?

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    Quote Originally Posted by a2j View Post
    so, without it, I should not have problem staring in cold/hot with e85?
    Not in warm, hot weather. However Ethanol does not vaporize down in cold temps like gasoline so it will be harder to start in cold temps. That has nothing to do with the FPR solenoid.

    -Chris

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