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56 omc triple

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  • 56 omc triple

    Im considering building a 56cid omc 3 holer and run it on alky, any thought on piston to wall clearance , carb jetting, oil mix, stuff like that??
    Jeff

  • #2

    Re: 56 omc triple

    for racing or just fun

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    • thetrailergod
      thetrailergod commented
      Editing a comment
      race it in 2 man rbt

  • #3

    Re: 56 omc triple

    Im considering building a 56cid omc 3 holer and run it on alky, any thought on piston to wall clearance , carb jetting, oil mix, stuff like that??
    What pistons are you going to use forged or cast? .004 is usual piston clearance but you can go .003 but will need to break in on bench and cam grind piston at wrist pin area. I would go 16 ccs in the head (some have gone as far as 13ccs) I would also go to adjustable needle in the carbs in place of jets. Use a pulse tuned exhaust (Hustler makes a good set up) and use 50/50 mix of castor oil and synthetic blend for oil.
    These motors have a weak point it is the rods, RPM over 8200 is ventilation due to rod failure.

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