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Old 11-20-2014, 10:46 PM   #36 (permalink)
Daox
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If your header is creating more low end torque, wouldn't it make sense that it also creates more knock? Higher charge density = more knock, right?

Higher charge density at the same ignition timing should always mean better efficiency (assuming everything else is constant). However, if your engine must retard timing for a higher charge density, then you can obviously lower efficiency. It sounds like this is what is happening to you ever_green.
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