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  1. #1
    Senior Member cheyenne580's Avatar
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    Default blocks

    What's the pro's and con's on aluim.{SP} blocks over cast iron block's besides the weight difference?




    Jim S

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  3. #2
    gn7
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    con--less horse power, expensive
    pro--repairable, available in wide choice of deck heights and and bore centers



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    steelcomp was here
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    Quote Originally Posted by gn7 View Post
    con--less horse power, expensive
    pro--repairable, available in wide choice of deck heights and and bore centers
    X2, but it seems that in a lightweight drag boat, the weight savings may be more significant then the HP loss.

    Hey GN...is that nail gun CA legal?
    If God is your co-pilot, change seats!
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    Highaboosta Unchained's Avatar
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    I've heard the HP disadvantage point before.
    Does anyone have any data on how much of a % factor that would actually
    be ?

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
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    I think I could run more boost but it's a real hand full right now

  7. #5
    gn7
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    Quote Originally Posted by steelcomp View Post

    Hey GN..is that nail gun CA legal?
    That's pending, but you just Arnold has one But then again, he has Hummers you and I aren't allowed to have



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    Quote Originally Posted by gn7 View Post
    That's pending, but you just Arnold has one But then again, he gets Hummers you and I aren't allowed to get
    You mean like from Maria?
    If God is your co-pilot, change seats!
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  10. #8
    Precision Craft Marine
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    We have always had a better handling, quicker accelerating boat with an aluminum block. Remember that drag boats do not ever have enough heat in the motors when we actually run the boat. Even with our totally enclosed cooling system, the difference between the iron block and the aluminum block is not much, but the extra weight is huge.

  11. #9
    Senior Member wizbang's Avatar
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    I personally used a Bowtie block for a ProStock engine. 500 inch Pontiac Kinsler injector. All I changed was the block to a Merlin-Lite. Same "everything" except the rings were new. Same brand and style rings, just new. Same guy doing the machine work too. + 38 hp on the same dyno !!!

    Gordy told me the same story, that I'd lose power ! I call BS !

  12. #10
    Senior Member wagspe208's Avatar
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    Quote Originally Posted by wizbang View Post
    Same "everything" except the rings were new. Same brand and style rings, just new. Same guy doing the machine work too. + 38 hp on the same dyno !!!

    Gordy told me the same story, that I'd lose power ! I call BS !
    I am pretty sure new rings cannot make a difference. Hell, almost no reason to ever replace them anyway.
    Wags

  13. #11
    steelcomp was here
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    Quote Originally Posted by wizbang View Post
    I personally used a Bowtie block for a ProStock engine. 500 inch Pontiac Kinsler injector. All I changed was the block to a Merlin-Lite. Same "everything" except the rings were new. Same brand and style rings, just new. Same guy doing the machine work too. + 38 hp on the same dyno !!!

    Gordy told me the same story, that I'd lose power ! I call BS !
    Couple of questions. Do you think an aluminum block can hold it's shape as well as an iron block? Do you think there's a reason NHRA Pro Stock engine builders will sacrafice more weight in an already iron block, because it'll make more power than something lighter?
    This is an old debate, and it'll go on forever. Your example is more the exception than the rule, and I'd venture a guess that something changed during the rebuild, because while in some cases it may be a wash, there's no way an aluminum block is going to make 38 more HP on it's own, over a good iron block.
    JMO.
    Last edited by scott foxwell; 12-23-2008 at 09:20 PM.
    If God is your co-pilot, change seats!
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  14. #12
    Highaboosta Unchained's Avatar
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    Quote Originally Posted by wizbang View Post
    I personally used a Bowtie block for a ProStock engine. 500 inch Pontiac Kinsler injector. All I changed was the block to a Merlin-Lite. Same "everything" except the rings were new. Same brand and style rings, just new. Same guy doing the machine work too. + 38 hp on the same dyno !!!
    Gordy told me the same story, that I'd lose power ! I call BS !
    There's some solid results. Now that's settled.

    Whenever I heard the old story about aluminum blocks not making the same HP as cast iron it was always from someone who didn't have one.

    I also heard that my aluminum block would be corroded down to dust after using it in a boat. I've got 9 seasons on my Arias aluminum block and it's still in great shape.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  15. #13
    steelcomp was here
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    Quote Originally Posted by Unchained View Post
    There's some solid results. Now that's settled.

    Whenever I heard the old story about aluminum blocks not making the same HP as cast iron it was always from someone who didn't have one.

    I also heard that my aluminum block would be corroded down to dust after using it in a boat. I've got 9 seasons on my Arias aluminum block and it's still in great shape.
    LOL...you go, unchained.
    I don't have an alligator, but I know not to stick my hand in one's mouth.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  16. #14
    "The" masheenist wsuwrhr's Avatar
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    Oh HERE WE GO AGAIN.......................
    SB Products:Inspiring metal to change shape, one chip at a time.
    Good labor isn't cheap, cheap labor isn't good.
    The United States, the new and improved Roman Empire.
    Buy American made goods whenever you can, the job you save may be your own.


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