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Matt_'77_2.7 Matt_'77_2.7 is offline
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Join Date: Oct 2003
Location: KC, MO
Posts: 32
A longer stroke motor will produce more torque absolutely with a few qualifications. The indicated mean effective pressure in the cylinder over the time span of one half cycle must average to the same value as the smaller stroke motor. If this is true the engine must produce more torque. The lever arm of the crankshaft is longer.

Just changing the stroke of the engine will not ensure this result. There are so many open variables in an engine that a major change like stroke must be made with many other changes. Possible intake/exhaust runner length, camshaft, and valve changes just to name a few. This would take a pretty hefty R&D budget.

Stroke vs. bore changes seem to be like turbo vs supercharge, a personal ideology. Don't even get into the long vs short rod debate.

Matt
Old 12-12-2003, 10:34 AM
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