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Thread: sealing scoop to carb.

  1. #1

    sealing scoop to carb.

    is there big gains sealing the scoop to the carb? curently running 388 sbc vega 2300lbs [email protected] the scoop is wide open on the bottom.

  2. #2
    Senior Member RACING JUNKIE
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    If it's unsealed, not really much use in having it, is there?

    The whole idea is to get some 'natural' supercharging going on by ramming air into the carb.

    Right now, all you have is a big parachute on the hood.
    -WJ Birmingham

    OneBadGMC.com

  3. #3
    Administrator RACING JUNKIE bjuice's Avatar
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    I have a 6 inch outlaw hood on my 67 camaro and i used foam that i cut out about 6 inches in the deeper parts and 4 inches elsewhere,,used some good emblem glue and get-er-done..

    the cowl hood is designed to pull air down from the winshield across top of the motor..you need to channel the air to your carb..the foam or whatever you use will also help create a barrier from the carb sucking down the hot air from exhaust etcc..


    a snorkle type scoop i would seal up 100 %..( i did on my vette)

    yes it helps
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  4. #4
    Senior Member RACING JUNKIE lively's Avatar
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    SEAL IT---ENGINE HOT AIR ISN'T GOOD 8) 8) 8) AND LIKE IT WAS SAID -WHY PUT A PARACHUTE ON THE FRONT ops: ops: ---DENNIS

  5. #5
    Senior Member DYNO OPERATOR
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    In my opinion, big gains, no. But it's worth it anyway. When I first started sealing the scoop, I didn't pick up at all, but consistency definately improved. I assume because the engine wasn't getting hot air from under the hood....

  6. #6
    Administrator RACING JUNKIE bjuice's Avatar
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    here is a pic of the insulator pan i made for my 632ci...notice the escap holes on the duck tail out the back this keeps the scoop from blowing apart with 180 mph winds channling thru the scoop.

    next pic is the entrance of the scoop..

    [img][/img]




    [img][/img]
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  7. #7
    Senior Member MASTER BUILDER
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    hey bjuice, is that a diverter? in front of the carb on the front inside of the scoop? does it help smooth the flow to the carbs?

  8. #8
    Administrator RACING JUNKIE bjuice's Avatar
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    yes ..that's what it is..a RAMP that feeds and diverts the air too the carbs creating a forced induction type situation...there has been some heavy reported gains in HP with the proper insulators pan set up..

    same watered down version of how a blow thru supercharger works.
    not to mention the isolation of engine heat from carbs.
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  9. #9
    Senior Member DYNO OPERATOR
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    I have a customer that was not running his scoop sealed and the insides on his engine was trashy every time I tore it down. I Finally made them seal the hood scoop. Bammo, next tear down engine was fairly clean. I have one now that refuses to use a hood scoop at all with an injected EFI engine. We will see what happens there.

    It is my theory that a good hood scoop increases ambient atmospheric pressure levels.

    Ed
    " Let all things that hath breath, praise the Lord. Praise Ye the Lord" Psalms 150 vs 6.

  10. #10
    Senior Member MASTER BUILDER
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    on my s10 i took the head lites out and made a ram air system for it . which is actually better, hood scoop or ram air?


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