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Thread: Purpose of an exhaust port that isn't flush with the piston at BDC?
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Old 06-24-2018 | 11:52 PM
  #32  
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Roelof
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Joined: Aug 2007
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From: Holland
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If the crankcase is blocking some flow you can always enlargen it w/o touching the sleeve.

I think this is a left over from very old plane engines where the sleeve is placed in a 45 degree position
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