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Thread: What RPM range should you build your engine

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    What RPM range should you build your engine

    I'm looking to rebuild this Ford 460 (don't believe its run since 2001). Will find out this weekend if its rusted through.
    But if its okay to rebuild what range rpm would be ideal to shoot for when selecting part$$ for it?
    It's going into a 1980 20' SleekcraftClick image for larger version. 

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  2. #2
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    Re: What RPM range should you build your engine

    Your hull will handle whatever power you can afford to throw at it so build for what your intended use of the boat will be. Glad your having fun on this project!
    Heavy Lake Lay Up Family Boat Ready To Race Any Takers

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  4. #3

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    Re: What RPM range should you build your engine

    Quote Originally Posted by azjimbob View Post
    I'm looking to rebuild this Ford 460...what range rpm would be ideal to shoot for when selecting part$$ for it?
    It's going into a 1980 20' Sleekcraft
    it really depends on desired horsepower, intended usage and application, budget, etc. Most people these days are turning to larger displacement stroker engines and turning them slower while using larger impellers, but if 500 hp or less is what you want then there are far less expensive ways to make 500 hp while using mostly factory 460 parts.

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  6. #4

    Re: What RPM range should you build your engine

    I’d suggest right about as high as to the point where she blows up...then back off it 300 RPM!!!
    AG6= Amazing Grace VI *
    1980 BIESEMEYER 27' VIKING

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  8. #5

    Re: What RPM range should you build your engine

    With 1/4 stringer boat, like yours, should clip along pretty well, with an "A" Impeller, and freshen up with a midsize cam, decent intake and carb. BBF engines like fuel, 850 DP Carb. with the log style exhaust prolly run about 4800 RPM, 60 ish, with OT headers maybe get 5000 rpm flat on good water, speed around 65.
    It's Impossible to Lose Your Footing, If Your On Your Knees"

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    Re: What RPM range should you build your engine

    Here is food for thought Steve, yes the Sleek is quarter stringer but with the glassed sub floor it is super stiff! Mine is anyway kinda like a unibody frame without the GM shuffle
    Heavy Lake Lay Up Family Boat Ready To Race Any Takers

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    Re: What RPM range should you build your engine

    My 460 stroked to 545 spins 5500 with a smallish cam. 55mph tops in good water with A impeller. Posted for real world numbers.
    FIVE HUNDRED AND FORTY FIVE CUBIC INCHES BABY
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