Building a 502 your thoughts
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Building a 502 your thoughts

  1. #1
    Senior Member Cobra 02's Avatar
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    Default Building a 502 your thoughts

    Just bought a GM factory 502" (4.466 x 4.00 )(9.80 Deck) short block ( just Block & Pistons) and installing it into a 2110 open bow approx:2250 pound boat, jet drive whats your thoughts on how you would set this up to get max. speed and torgue.( river boat 5,000-6,500 rpm engine) I know its not a speed boat but tired of having the slowest 21' open bow on the river. Your thoughts are greatly appreciated.

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    Renegade jet tunneljet's Avatar
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    Do a search, I remember a thread something like 700hp 502 recipe (spelling)?

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    Senior Member Constant840's Avatar
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    A good set of heads and an aggressive cam will get you in the 7-800hp range all day.

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    Senior Member shimp's Avatar
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    What would be a "good" set of heads? Like some DART heads or something? Just asking, my 454 (468) is in the shop right now being built......

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    Senior Member Constant840's Avatar
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    Brodix, Darrt, AFR.... maybe even some cheap Pro Comps?

    Widowmaker will probably chime in here. He is running a 502 bottom end with really great results.

  8. #6
    Living in a cage of fear thatguy's Avatar
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    I don't have dyno results, but am happy with my set of Brodix 280cc rect. runners. (BB1)

    They are the smallest rect. runner heads that Brodix makes, I believe.

    119cc Chambers.

    Perfect for 500 inch motors at less than 5500 RPM?

    Here is the link:
    http://www.brodix.com/heads/bb1.html
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  9. #7
    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by Cobra 02 View Post
    Just bought a GM factory 502" (4.466 x 4.00 )(9.80 Deck) short block ( just Block & Pistons) and installing it into a 2110 open bow approx:2250 pound boat, jet drive whats your thoughts on how you would set this up to get max. speed and torgue.( river boat 5,000-6,500 rpm engine) I know its not a speed boat but tired of having the slowest 21' open bow on the river. Your thoughts are greatly appreciated.
    I doubt that you're looking for 700+ for your 21' open bow, here's an engine I helped a friend with many mooms ago. He purchased a 502" short block and added Brodix Heads and a small roller cam:




    Sleeper CP
    Last edited by Sleeper CP; 05-21-2009 at 08:35 PM.

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  10. #8
    Senior Member Boat 405's Avatar
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    Default recipe

    2007 GMPP Gen VI 502 bottom end
    AFR heads approx 9.2 to 1 compression
    chris straub solid roller camshaft morel solid lifters
    Boat 405.

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