Quote:
Originally Posted by Dimman
Is the situation that the ratio that gets slightly less friction also has less peak acceleration? Because then you can get a mass reduction with going to a lighter connecting rod. And then slightly lighter crank counter-weights, slightly lighter crank damper, etc...
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So just thinking physically from the engine, if the crank diameter does not change, the stroke does not change. Suppose if you do not change the blocks, by increasing the rod length, you need to change the piston head with less length or use a different piston head. Doing so, you also need to see if the longer rod length can clear the rotation to see if the rod will hit the wall surrounding the crank.
That is, if you do not change the displacement.
One thing I know, based on the calculation of mean piston speed, is that if you want to get high-rev, you need to reduce the stroke so that your rod will not break under high-rev. Motocycle and F-1 engine with high rev but pretty small stroke.
However, I do not know the benefit of going with a longer rod (or shorter for that matter). Can someone explain it?