454 Carb Recommendation
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454 Carb Recommendation

  1. #1
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    Default 454 Carb Recommendation

    I have a Gen V 454 that I'm getting ready to place back in my 1996 Mirage Jaguar Jet boat. The engine is stock from everything that I know about it. I just placed a new Edlebrock Victor Jr. high rise open plenum intake on it. I'm looking to put a new carb on it. I have an older Holley 750CFM carb but was told that carb would be a disservice to the new intake in getting full performance out of it. What do you all recommend. I contacted CP Performance and Hardin and they said they highly recommend the Quick Fuel 750CFM. Would there be issues going to an 800CFM?

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  3. #2
    Some guy obnoxious001's Avatar
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    With a "stock" 454 engine in a jet boat that may turn 5000 rpm, the 750 is the correct size carb, and probably no advantage at all in ditching the Holley for a Quickfuel, unless yours is in poor working condition.

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    My Holley carb is an older one with vacuum secondary's. I was told the mechanical secondary's would be much better performance wise (more responsive). I'm new to this car engine stuff. I'm more of an outboard guy.

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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by kcoleman10 View Post
    My Holley carb is an older one with vacuum secondary's. I was told the mechanical secondary's would be much better performance wise (more responsive). I'm new to this car engine stuff. I'm more of an outboard guy.
    I am trying to save you a fistful of money, if your 750 vacuum carb is right, you won't see much benefit, if any, going to mechanical secondaries with your "stock" engine, but it will probably use more fuel.

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    Village Idiot fc-Pilot's Avatar
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    Quote Originally Posted by obnoxious001 View Post
    I am trying to save you a fistful of money, if your 750 vacuum carb is right, you won't see much benefit, if any, going to mechanical secondaries with your "stock" engine, but it will probably use more fuel.
    X2

    Paul

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    Senior Member ol guy's Avatar
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    Quote Originally Posted by obnoxious001 View Post
    I am trying to save you a fistful of money, if your 750 vacuum carb is right, you won't see much benefit, if any, going to mechanical secondaries with your "stock" engine, but it will probably use more fuel.
    you said the right words there! If it is right. L3310 holleys will work good on a stock 454 "if they are right" It takes alittle tuning to make them "RIGHT". Most times I have tuned them for a marine application requires vacuum spring and jetting changes. They were designed for an over the road application and put into a boat may need a little tweek here and there. MLAO M

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