Posted by buickanddeere on December 26, 2012 at 11:50:29 from (184.151.61.113):
In Reply to: Re: JOHN DEERE 620 posted by 2-banger on December 26, 2012 at 07:10:38:
I would work of volumetric efficiency and rpm before going to such high compression ratios. The rate of return on conversion of compression pressure vs combustion pressure into work is dropping by 175psi and not worth the rate of return past 200psi. That last 1-2 HP isn't worth the extra 10 octane points required in the fuel.
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