The higher compression piston lowers the volume of the combustion chamber.
It's a matter of taking the 0.616 liters (3.7/6)of air/fuel mixure you sucked in on the intake stroke and compressing it into a space that now has less volume. Compressing 0.616 liters into the volume of a golf ball will have higher pressure than compressing into into the volume of a baseball.
Last edited by mcphelps; 08-11-2009 at 10:11 AM.
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