Derek,
I was pretty short on explanation. I'm considered an engine fundamentally as
a black box that converts fuel/air into work. So many cfm of fuel/air go in
and so much horsepower comes out. This should be the starting point in
comparing engines. If two black boxes have the same horsepower versus cfm
fuel/air, then for all practical purposes they are equal, regardless of
bore, stroke, displacement, etc. Of course, you get cfm by multiplying rpm
times displacement. That's why I said to normalize the hp/torque curves by
the displacement.
Bob Palmer
rpalmer@ucsd.edu
rpalmerbob@adelphia.net
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