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Old 09-20-2010, 08:26 PM   #14 (permalink)
Daox
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Its pretty accurate. If you compress too much air in the engine you have problems with preignition and pinging, thus the need for most super/turbocharged engines to use higher octane fuel. If you don't use this higher octane fuel you have to sacrifice optimal ignition timing and thus efficiency. Another remedy for this problem is to reduce the compression ratio which also lowers efficiency.
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