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Thread: Banging out big block

  1. #1
    Junior Member SHOW GUEST
    Join Date
    Mar 2005
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    5

    Banging out big block

    I have a 482 big block that I ran 2 nights last season with my sons holley 1050 carb on it. It ran great. I ordered a new carb that was set up for my engine and it would launch great but would bang out shortly after it launched. We tried bigger jets and several trys with no success. The next week we put his carb back on and it started banging out again. Nothing else changed from last season. We checked plugs, valve settings, timing and a different coil. Nothing was found to be bad. Any ideas?

  2. #2
    Senior Member EXPERT BUILDER
    Join Date
    Dec 2010
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    345
    Did you check fuel. Pressure, volume, ect.

  3. #3
    Junior Member SHOW GUEST
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    Mar 2005
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    Yes, we pulled fuel line and ran pump into a fuel jug untill fuel cell was empty. It ran a full stream the whole time.

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
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    2,998
    Ohm he plug wires, and maybe check the cap and rotor. Seen a rotor crack this weekend, causing a issue like your having.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  5. #5
    Member JUNIOR BUILDER
    Join Date
    Jan 2006
    Posts
    98

    carb

    have you tried a tube from front vent to rear with notch cut at top

  6. #6
    Junior Member SHOW GUEST
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    Mar 2005
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    We have not tried the vent tube-but will. Also, I'll take cap off and inspect for cracks. Thanks guys

  7. #7
    Senior Member EXPERT BUILDER
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    Dec 2010
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    345
    There is something that i have seen before is rpm and retard chips that go bad.

  8. #8
    Junior Member SHOW GUEST
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    Mar 2005
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    5
    I'll try different chips if dist cap looks good. Thanks

  9. #9
    Junior Member SHOW GUEST
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    Mar 2005
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    I found out I have at least 2 broke valve springs. Some check to be a little weak. Thanks for all the help.


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