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Old 01-31-2008, 11:54 PM   #9
Back Road Runner
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Member#: 60082
Join Date: Apr 2004
Chapter/Region: MWSOC
Location: Minnesota
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2004 Forester STI
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But this is what you want. You need that flow from the intake side to clear out the spent charge from the combustion chamber. This is the whole idea behind scavenging.

Backpressure is always bad. You're running a big air pump. You don't want restrictions. Restriction = inefficiency.
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