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Thread: New motor?

  1. #16
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    Quote Originally Posted by chip w View Post
    If I understand correctly I could bolt my exhaust manifolds and risers onto a 377 long block. Would my flywheel fit or do I need to pick up a new one?
    Yes the manifold will bolt on. If you go with a GM Performance block which is used by Mercruiser and it's a one piece main seal hydraulic roller block . the fly wheel will bolt on. The rotating assembly you have is an internal balance on the front and external balance on the rear. You can get a 377 internal on both sides.In that case you'd have to get a zero balance flywheel. So That's something you have to ask, from whom ever you get the long block from. What I suggest is going with the short block with a compression ratio based on 64 CC aluminum heads and a HR 270 high duration camshaft. Then buy a good set of USA made aluminum heads and a marine roller cam
    machinist ,bore it deeper,ream it bigger, and lap it to a fine finish



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  2. #17
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    Well I don't have to tell what motor I think you should use...

    Quote Originally Posted by chip w View Post
    If money weren't an object it would be fun to put one of the new LS3 motors in with the full system but $16k seem a little pricey.
    $16k for an LS3?. Someone is making some serious money on that.

    $6750 for LS3 from Summit. $1000 for aluminum manifolds/risers from Marine Power. $1500 for a Holley computer and you're at $9250.

    Go for it.............!!!!!
    Why is faster never fast enough.

  3. #18
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    Thank you to all for the ideas. I have a lot to ponder over the weekend. The idea of building the short block has some appeal to it, especially if I can reuse my block and save some money that could be put towards the cam and heads. I'll keep everyone posted.

    '07 22 Classic Shelby GT
    '96 18 Classic - sold
    '69 16 Ski & Sport - sold


  4. #19
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    Quote Originally Posted by chip w View Post
    Thank you to all for the ideas. I have a lot to ponder over the weekend. The idea of building the short block has some appeal to it, especially if I can reuse my block and save some money that could be put towards the cam and heads. I'll keep everyone posted.
    If you lost a head due to corrosion there's NO way I'd reuse that block. Shoot, I don't think I could be talked into rebuilding a raw-water-cooled marine block in almost any circumstances. New block or refurb'd automotive block isn't a lot of $$ in the grand scheme of things, and allows you to upgrade to four-bolt mains and factory roller cam.
    "Speed's fine, but accuracy is final."
    - Bill Jordan

    1998 Donzi 21LXR
    1971 Boston Whaler 13

  5. #20
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    Quote Originally Posted by duckhunter View Post
    If you lost a head due to corrosion there's NO way I'd reuse that block. Shoot, I don't think I could be talked into rebuilding a raw-water-cooled marine block in almost any circumstances. New block or refurb'd automotive block isn't a lot of $$ in the grand scheme of things, and allows you to upgrade to four-bolt mains and factory roller cam.
    I'm glad you said that Duck, because I didn't want to be the one to!
    A good 4 bolt main truck engine isn't that hard to find.
    George Carter
    Central Florida
    gcarter763@aol.com
    http://kineticocentralfl.com/


    “If you have to argue your science by using fraud, your science is not valid"
    Professor Ian Plimer, Adilaide and Melbourne Universities

  6. #21
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    Quote Originally Posted by gcarter View Post
    I'm glad you said that Duck, because I didn't want to be the one to!
    A good 4 bolt main truck engine isn't that hard to find.
    I agree. It will be a new block. Just have to decide what platform we will build from.

    '07 22 Classic Shelby GT
    '96 18 Classic - sold
    '69 16 Ski & Sport - sold


  7. #22
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    I installed a full system on mine, got plenty of advise
    from these same guys. The full system fit like it was
    factory equipped. Block, heads, an manifolds. Question
    about the 377,,, fuel injection or carb??? The 377 is a hell
    of an engine
    FISH HARD

  8. #23
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    Thinking carb.

    '07 22 Classic Shelby GT
    '96 18 Classic - sold
    '69 16 Ski & Sport - sold


  9. #24
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    Quote Originally Posted by chip w View Post
    Thinking carb.
    Then I vote again for an LS3. No computer needed. Sell the FI intake and throttle body to pay for the carb intake.
    Why is faster never fast enough.

  10. #25
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    There may be a 3rd option that I'm considering. I'm looking at a 2004 22 Anniversary edition with a fresh Merlin 509 and also a 2006 Shelby. If I do that it will make a difference on what I do with the 18. The 22 is appealing for the open water. The 18 is great for the lake. Lots to consider.

    '07 22 Classic Shelby GT
    '96 18 Classic - sold
    '69 16 Ski & Sport - sold


  11. #26
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    Well that changes things. Now I vote Shelby. By far the nicest 22 Donzi ever made imo
    Why is faster never fast enough.

  12. #27
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    Quote Originally Posted by yeller View Post
    Well that changes things. Now I vote Shelby. By far the nicest 22 Donzi ever made imo
    I'm leaning that way. Business is off to a good start this year and that makes a difference. It's blue with the white deck stripes. Sure would look good in the new garage once it's finished! IMHO, it will look good with me in it too. Even better with Jen in it!

    '07 22 Classic Shelby GT
    '96 18 Classic - sold
    '69 16 Ski & Sport - sold


  13. #28
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    '07 22 Classic Shelby GT
    '96 18 Classic - sold
    '69 16 Ski & Sport - sold


  14. #29
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    That's a beautiful blue Shelby, my favorite.

  15. #30
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    That's hot!
    "Speed's fine, but accuracy is final."
    - Bill Jordan

    1998 Donzi 21LXR
    1971 Boston Whaler 13

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