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Old 09-15-2020, 04:52 PM   #9
Jim Brierley
Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 3,434
Default Re: Lack of power/rpm

Lower compression engines need more spark advance in comparison to higher compression. The mixture burns slower, in higher compression engines, the fuel molecules are closer together, so burn faster.
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