Head question?
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Head question?

  1. #1
    Senior Member Nordic78's Avatar
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    Default Head question?

    Could anyone tell me if 290cc Intake Ports ,110cc Combustion Chambers would respond well in a jet boat 454?

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    Senior Member hotbo's Avatar
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    yes it will do just fine.

    the 290cc is gonna limit how much power you are gonna put out,but on the flip side,imo unless you have a big inch mill then you will be just fine.


    there are plenty of guys i know making decent power with the 781or049 cast heads.and they have i think 250s on the intake runner.


    the 110cc chamber is good for a small dome piston to make some decent compression.anyway hope this helps,travis

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by Nordic78 View Post
    Head Question?

    Well...it usually starts by her getting down on her knees...

    AW SHIT! Sorry...wrong thread

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  6. #4
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    You can do 600 hp 496 motors with pocket ported factory ovalports. More with the darts. TIMINATOR
    MODESTY IS A CRUTCH FOR THE INCOMPETENT!

  7. #5
    Senior Member HKROB's Avatar
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    I have a set of Edlebrock heads with 290cc intake runners on my 454 it made 600hp with a flat tappet cam & 10-1 CR .

  8. #6
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Yes Nordic, those should do just fine on a 454. 781/049's do well, very well with a bit of porting, on what are nominally 255cc ports.

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