GM ZZ572 components
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GM ZZ572 components

  1. #1
    Some guy obnoxious001's Avatar
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    Default GM ZZ572 components

    Anyone have a definative answer as to what crank and rods GM uses in their 572 crate engines? Someone is telling me they use a big name H beam rod, but descriptions I have seen just call them 4340 H beams.

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    Super Moderator HammerDown's Avatar
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    I have the article from Hot Rod magazine 2004...it 'appears' to say Manley on the Rods, no info on the crank.
    Scoggin Dickey Performance should be able to answer all your questions >1800-456-0211
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    Some guy obnoxious001's Avatar
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    Could you post the photos a little larger,, pretty hard to read! lol

    Thanks, guess that confirms what I am being told, appreciate the effort to post photos for me.

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    Damn, 787hp on 91 octane. That's impressive!.



    Darrell.
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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by obnoxious001 View Post
    Could you post the photos a little larger,, pretty hard to read! lol

    Thanks, guess that confirms what I am being told, appreciate the effort to post photos for me.
    I left them LARGE so you could read/view the print...now that you did I'll knock'em down.
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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by HammerDown View Post
    I left them LARGE so you could read/view the print...now that you did I'll knock'em down.
    Thanks again, obviously I was just poking fun!

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    cfm
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    Quote Originally Posted by DMOORE View Post
    Damn, 787hp on 91 octane. That's impressive!.

    Darrell.

    Who did the dynoing ?

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    See if Hammerdown can expand the artical again. Pretty interesting stuff, and they actually talked about the dyno session compared to the factory dyno results/claims. It made 800+hp in factory tune and recommended fuel. The 720hp number has to do with the factory correction factor, which is different than the "accepted" factor by most speed shops. Good read.


    Darrell.
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    Super Moderator HammerDown's Avatar
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    Here ya go...






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    cfm
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    Quote Originally Posted by cfm View Post
    Who did the dynoing ?
    Thanks Hammerdown for blowing it up. So, the answer is Westech. Got it.

    So, probably a 730-740hp motor on more typical 'speed shop' dynos.

    801 x .90 = 720.9

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    Quote Originally Posted by cfm View Post
    Thanks Hammerdown for blowing it up. So, the answer is Westech. Got it.

    So, probably a 730-740hp motor on more typical 'speed shop' dynos.

    801 x .90 = 720.9

    What make you say that? It seems the GM numbers are way low, and the correction factors of the article are much closer to what people are using.



    Darrell.
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