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Thread: CARB??????

  1. #1
    Junior Member JOURNEYMAN
    Join Date
    Nov 2007


    :? I am building a 383 chevy would like input on the size of carb. Some info 11to1 comp, 250 nitrous, hurricain intake, world heads professionally ported and polished and matched. 1.6 rockers

    cam specs
    Cam Style: Mechanical roller tappet
    Basic Operating RPM Range: 3,000-6,500
    Intake Duration at 050 inch Lift: 255
    Exhaust Duration at 050 inch Lift: 262
    Duration at 050 inch Lift: 255 int./262 exh.
    Advertised Intake Duration: 300
    Advertised Exhaust Duration: 308
    Advertised Duration: 300 int./308 exh.
    Intake Valve Lift with Factory Rocker Arm Ratio: 0.575 in.
    Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.575 in.
    Valve Lift with Factory Rocker Arm Ratio: 0.575 int./0.575 exh. lift
    Lobe Separation (degrees): 114
    Intake Valve Lash: 0.020 in.
    Exhaust Valve Lash: 0.020 in.
    Computer Controlled Compatible: No

    thanks for help :?

  2. #2
    Junior Member APPRENTICE
    Join Date
    Aug 2007
    750 to 800 cfm is nice for your combination

  3. #3
    Join Date
    Dec 2005
    Building shelves for wally's
    Bolaws & Airflow research and others use this formula
    engine cubic inches X maximum RPM

    Example a 383 @ 7000rpm would use 775.75 carb. for a race engine and a rule of thumb is too use the next smaller size if for occasional street driving.


  4. #4
    Senior Member MASTER BUILDER
    Join Date
    Apr 2003
    Brookings South Dakota

    AED carb

    You need the AED 750 HOM carb, we sell them, would work great for your application
    Competition Engines & Hardcore Engine Parts
    [email protected]

  5. Racing Junk

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