Author Topic: Free Porting  (Read 2077 times)

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Offline 660magnum

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Re: Free Porting
« on: February 07, 2014, 09:38:23 am »

Small exhaust port openings @ TDC are acceptable in the .005" to .010" range, but excessive openings may lead to detonation.

IMHO, there are no advantages in a short circuit or free porting situation only losses, however the looses may be so minimal that they are insignificant in effect to overall performance if controlled to the .005 to .010 range.
That must be my situation for there is nothing wrong with the way the 115i runs? A positive may be that the skirt is short on the intake side too and that must give a lot of duration there?
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