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Old 08-16-2014, 07:58 PM   #24 (permalink)
Mustang Dave
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Trigger - '07 Ford Mustang V6 Premium Coupe
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Static compression ratio is set by piston displacement and combustion chamber volume. It can't be changed without replacing or modifying parts.
However....
Varying the valve timing can vary the effective compression (and expansion) ratios considerably.
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