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Thread: Oval vis-a-vis Rectangular Ports

  1. #1
    Senior Member MASTER BUILDER
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    Oval vis-a-vis Rectangular Ports

    Are there any real performance differences between the above on a bbc?

  2. #2
    Senior Member MASTER BUILDER
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    Heads

    Depends on what size engine and weight of car.

  3. #3
    Senior Member SENIOR BUILDER
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    Re: Oval vis-a-vis Rectangular Ports

    Quote Originally Posted by jreiley
    Are there any real performance differences between the above on a bbc?
    NO !

    It's all just hype on a conventional BBC head, .. the port is too close to the deck
    to make use of any real oval port designs. Most of the current oval
    port heads like the Edelbrock / Musi or the Brodix are mostly
    just oval at the gasket and return to a semi oval in the port.

    Good oval port design has to follow the oval port through the entire port
    all the way to the valve to make any real benefit. look at SB2.2, oval
    port big chief or any raised runner head. Good oval ports have to get the
    port entry at least 2" off the deck.

    Curtis
    ----------------------------------------
    Race Flow Development
    Simultaneous 5-axis CNC Porting
    http://www.raceflowdevelopment.com

  4. #4
    Administrator RACING JUNKIE bjuice's Avatar
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    Re: Oval vis-a-vis Rectangular Ports

    Quote Originally Posted by cboggs
    Quote Originally Posted by jreiley
    Are there any real performance differences between the above on a bbc?
    NO !

    It's all just hype on a conventional BBC head, .. the port is too close to the deck
    to make use of any real oval port designs. Most of the current oval
    port heads like the Edelbrock / Musi or the Brodix are mostly
    just oval at the gasket and return to a semi oval in the port.

    Good oval port design has to follow the oval port through the entire port
    all the way to the valve to make any real benefit. look at SB2.2, oval
    port big chief or any raised runner head. Good oval ports have to get the
    port entry at least 2" off the deck.

    Curtis

    makes good sense. :!:
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  5. #5
    Senior Member MASTER BUILDER
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    out of my mind in Kalamazoo, MI
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    179
    ....See Curtis is DA-MAN :wink: :wink:


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