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Old 10-29-2007, 01:33 AM   #7
Homemade WRX
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Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: 3MI Racing LLC
96 bastard child
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longer runners increase lower rpm volumetric efficiencies which translates into low end torque..the trade off is top end volumetric loss. This trade off can be reduced someif the manifold is properly designed to then catch another reflective wave at a higher rpm.
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