Some of the high diesel compression ratio is just to get the engine started while cranking. Some of the old engines such as the Lister LS series used high compression to start and low compression to run. The direct injection gassers are into the 11 to 1 range now. That is near diesel.
Contrary to popular belief, high compression does not make power. It's the pressure difference between compression and combustion pressure where effective working pressure is derived. 600psi compression and 1100psi combustion does no more work than 200psi compression and 700psi combustion.
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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