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Thread: Finger ports, how to find where to put them

  1. #1
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    Default Finger ports, how to find where to put them

    be talkin about finger ports, how to find where they go, port on the piston, and any other important measurement that you would need to know to install them with a good outcome.

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    ok see how this looks
    Attached Images Attached Images  

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    ok, the intake side, no matter who's looper you are runnin, this is more or less the intake ports you are runnin

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    so boost in the center and two side tranfurs, on a used cyl wall some times you can see where the ring gaps run, if not or fresh, you will need to mark the pins to the crown and reinstall ( you don't need the rings on) makin shots of said marks .............

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    mark the piston pin with pencil up the side then to the crown
    Attached Images Attached Images    

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

  6. #6
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    then install, no rings, with bearin, snug is good, at TDC transfer the marks from the crown to the deck of the block.....

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    Do you have a dyno or access to one?

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    love to see

  9. #9
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    on a Stinger, or Yamaha 70 or a SST60 , it's about 10, 10hp total . on a 30hp be less. on a 90hp Yam be more.

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    Is this part of your 56er six pack build thread Fast? Or is that thread dead
    Never liked where the ring pins line up, after marking the pistons and cylinder walls I always shied away from cutting into it .

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