Quote:

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The thing with the intake closing is thats the last
thing to happen as the piston is starting up the cyl... you
wont start to make compression until the intake closes...
the dynamic compression starts when the intake closes
but it determines where the piston is in the upward
stroke... if you look at the wallace site(dynamic
compression) you will see that it gives you the
EFFECTIVE STROKE... thats the length of compression
you have

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oh wups duh....got to really over thinking things.
was thinking backwards about overlap.