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Old 09-13-2008, 05:41 AM   #41 (permalink)
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There is a lot of data on retiming the ignition and cam for the Geo Metro if you have a browse, don't know about the others.

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Old 03-28-2009, 02:46 PM   #42 (permalink)
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actually, some engines work more efficiently with a bit of backpressure in the exhaust , but usually anything less than stock is good.

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