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With due respect, I question this formula. Four cycle engines fire every other revolution, on the compression stroke, but not on the exhaust stroke. Thus, it would be only three ignitions per rev; six ignitions would equal 2 revolutions, right?
Bill
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BJ's BlackBox -- 2001 Boxster
1997 SAAB 900S Turbo
1980 Maxda RX-7
1974 Fiat 124 Spider
1976 Datsun 260Z
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