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Thread: Carb Question

  1. #1
    Join Date
    Aug 2014
    Posts
    15

    Default Carb Question

    I have a 331 CID SBC with a 750 cfm 4 barrel with vacuum secondaries. There is a guy selling a holley ultra 650 cfm 4 barrel with mechanical secondaries for 500 dollars. Will that carb run my motor fine. We are running race gas 114.

  2. #2
    Join Date
    Sep 2009
    Posts
    832

    Default

    The smaller Carb would probably aid in drivability over the bigger one assuming both were optimized.

  3. #3
    Join Date
    May 2007
    Location
    tulsa america
    Posts
    2,687

    Default

    how many rpm are you turning it? I would think you would have to turn it 8500 to get it to run.

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