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Thread: {CARB-SWAP} fuel pressure too high,,,

  1. #1
    GMN Founder Grand Marquis GT's Avatar
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    Default {CARB-SWAP} fuel pressure too high,,,

    It wraps the needle around on the 15 psi gauge a idle! :hairrais: Looks like its time for a low pressure pump...
    1983 Grand Marquis 2Dr Sedan "Mercules"
    Tremec TKO conversion, hydraulic clutch, HURST equipped!


  2. #2
    Domestic Tourist Lincolnmania's Avatar
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    yes not good

    1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
    2006 Lincoln Town Car Signature. Stock for now
    1989 Ford F-250 4x4 much much more to come, sefi converted so far.
    1986 Toyota pickup with LSC wheels and 225/60/16 tires.
    2008 Hyundai Elantra future Revcon toad
    1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

    please be patient, rebuilding an empire!


  3. #3
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    That or a fuel pressure regulator with HI-flow capacity! Figure the most your carb should ever see if 4-6 PSI.
    Car: 2004 Mercury Marauder
    Engine/Tranny: 49k miles and bone stock....for now


  4. #4

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    I like my mechanical fuel pump. Simpler to setup than an external electric pump.

    Supposedly the Mallory fuel regulator is a return style regulator that some guys have used with in tank EFI pumps on carb conversions. It is a little pricey though.

    Tom

  5. #5
    GMN Founder Grand Marquis GT's Avatar
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    Im just gonna run a justin-style fuel setup.
    1983 Grand Marquis 2Dr Sedan "Mercules"
    Tremec TKO conversion, hydraulic clutch, HURST equipped!


  6. #6
    Certified Yeti Trainer grandpaslincoln's Avatar
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    The max pressure before it overwhelms the needle is around 7. I run 4, and it works good. If it's running that much pressure, there would be an indication of it doing so. Like, fuel spraying from between the carb body and the top of the fuel bowl. On that other carb I had, the needle stuck open, and fuel poured out of it, and it was only 4 PSI, so there should be fuel spraying everywhere.

  7. #7
    Cheese Nazi phayzer5's Avatar
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    Default



    When I first installed the Holley Red I'm currently using, this is the pressure i had to drive home with:



    Disconected fuel pump power, started it up to run the carb dry, reconnected power and stayed in 3rd for most of the 20 miles home to keep the rpms up high enough for it to stay running. When the cheapo mr gasket regulator went bad recently, fuel was pouring out the carb and the gauge was maxed out. With the Holley regulator I have now (same one provided with the holley blue), I have it set at 5psi deadheading the rest of the fuel. I call it a Holley "Purple" fp...Holley red with the attitude of a blue

    RIP Jason P Harril, we'll miss ya bro

    '80 Town Coupé
    '84 Towncar - Teh Cobra TC, 408w powered
    '16 Ram 1500 CC Outdoorsman, Hemi/3.92/8sp 4x4

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