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*AzCivic* · 12-30-2003, 06:59 PM

actually after thinking about it there isnt any more leverage cause with a longer stroke you have to use shorter rods, which would put the rod at a greater angle to the crank, so instead of the piston/rod pushing done on the crank, it would push to the side alot earlier than an engine with a shorter stroke.

yeah a engine with a longer stroke does have a higher piston speed which would create a stronger vacuum when the intake valves open, BUT there wil be less dwell time at BDC/TDC(whereas an engine with a shorter stroke would have more dwell time, or more time for the intake/exhaust to enter/exit. So everything probably evens out.

12-30-2003, 06:59 PM	#31
AzCivic Moderator Join Date: Feb 2002 Location: Az Age: 43 Posts: 3,804	actually after thinking about it there isnt any more leverage cause with a longer stroke you have to use shorter rods, which would put the rod at a greater angle to the crank, so instead of the piston/rod pushing done on the crank, it would push to the side alot earlier than an engine with a shorter stroke. yeah a engine with a longer stroke does have a higher piston speed which would create a stronger vacuum when the intake valves open, BUT there wil be less dwell time at BDC/TDC(whereas an engine with a shorter stroke would have more dwell time, or more time for the intake/exhaust to enter/exit. So everything probably evens out.