header size?
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Racetracks
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Re: header size?
Generally speaking, yes. Smaller diameter keeps velocity high for good scavenging, but then becomes a flow restriction at higher flow (higher RPM). Larger diameter has better flow at high RPM, but has poor velocity at lower flow rates (lower RPM). Primary length tuning is very important too.
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Silver Sube 01
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11-10-2002 11:08 AM