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Old 11-17-2000, 12:52 AM
P.E.Haiges P.E.Haiges is offline
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Join Date: Jan 2000
Location: PA
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Compression ratio is the volume of combustion chamber with the piston at bottom dead center compared to the volume of the combustion chamber with the piston at top dead center. It cannot be changed by the camshaft. It can be changed by the shape of the piston crown or the shape of the cylinder head in the area above the piston.
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