Quote:
Originally Posted by drrbc
...As in the two stroke the intake charge is being pulled into the cylinder as the exhaust is being pulled out. Not so in a 4 stroke. ...
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Actually, many 4-stroke engines have intake and exhaust overlap, where both are open at the same time for a bit. This is especially so in higher-performance engines, though they generally don't go as far with it as 2-stroke ones do.
-soD