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Old 08-03-2009, 04:24 PM   #61 (permalink)
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Originally Posted by Superturnier View Post
Would a smaller diameter piston be better, since there would be less area for the vacuum at the top of the piston?

So a "long stroke" engine would be more economic?
This is what I've always understood, but not as a matter of the vacuum above or below the piston.

See, if you increase the stroke, and decrease the bore, on a linear scale, (to keep things equal) you're still moving the same volume below the piston.

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