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stock 4.3 crankshaft vs marine 4.3 crankshaft

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  • #16
    Re: stock 4.3 crankshaft vs marine 4.3 crankshaft

    Posting some more pics of Marine versus stock Sy/Ty... marine is much beefier in certain areas. The pointer in these pics is always pointing at the marine crank.







    Stock crank


    Marine crank






    ...Rob
    All my wife can say about it, is that it's really scary
    Sy #1654 Link to my Photobucket page

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    • #17
      Re: stock 4.3 crankshaft vs marine 4.3 crankshaft

      Well done!
      Build is srp pistons, eagle rods ,4 bolt caps,vortechs 2.02 .1.60 ,1.5 roller rockers, gtq67 turbo, 75# inj,415 cam ,mccoy a2a and new tune by phill long also waller trans,caltracs,greendots,Msd Dig 6 with 2 step, Best times so far 1.42 60ft!!!!! 6.783 at 99.56mph
      http://www.cardomain.com/id/cloneman315

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      • #18
        Re: stock 4.3 crankshaft vs marine 4.3 crankshaft

        And just so we have a complete set of picks of all the Crank iterations, here are some picks of the "lightweight" SyTy crank...

        Distinguishing mark of the lightweight is this hole in the number one journal...


        As opposed to these "heavy" cranks (standard left, marine right)...


        And more pics of the lightweight with applicable casting numbers...








        ...Rob
        All my wife can say about it, is that it's really scary
        Sy #1654 Link to my Photobucket page

        Comment


        • #19
          So marine crankshaft work in SyTy engine without any works to block?

          my crank blew 3 pieces but somehow no damage to the block.

          splayer caps held it fine. Rods and pistons are safe.
          John

          91 Syclone #644
          87 Jimmy S15 2wd V8 TPI
          86 Z28 355 high modify

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          • #20
            Sy644,
            You need to get the caps put back on the block and check the line bore. Take a picture of the first and second main cap (from the front) and post it. The amount of heat/damage that I see the mains of the block will most likely need to be replaced and have it honed. Please due yourself a favor and check all of the caps as when they get heat in them as yours did they move around to much when they heat up during normal running after the rebuild.
            Bob

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            • #21
              Another thing I am thinking the two and four rod took some heat also. Post pics of them also please.
              Bob

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