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searcher
Senior Member
Username: searcher
Post Number: 390
Registered: 10-2004
| | Posted on Monday, December 07, 2009 - 09:27 pm: | 
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I was just getting some understanding of two port and three port engines, now this five port shows up. How did that work?
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gregoryan
Advanced Member
Username: gregoryan
Post Number: 49
Registered: 09-2004
| | Posted on Monday, December 07, 2009 - 11:51 pm: |
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just write to them for the catalogue offered!
heh heh
maybe they're just adding the amount of transfer ducts, or port windows, rather than piston covered port designations??? |
ernie
Senior Member
Username: ernie
Post Number: 1126
Registered: 01-2002
| | Posted on Tuesday, December 08, 2009 - 08:02 am: |
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Most likely a 2-3 port engine.
Erd and Acadia except the 3hp Acadia and some others. And Oh yea Yamaha motorcycles in the 70s. They called it "torque induction"
These engines have 2 passages from the carb to the crankcase. 1 uses a check valve to seal the crankcase on the down stroke of the piston 2 port and one uses the piston skirt to close the intake passage 3 port.
Hence the 5 port designation 2 port plus 3 port
Maybe..... |
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