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Old 06-06-2009, 01:59 PM   #12 (permalink)
aerohead
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the look

The rule of thumb from Walter Korff,is that the grille opening be as wide as the radiator and no less than 1/4 height of the radiator,with the inlet opening at least 1-radiator core height' distance ahead of radiator,and a completely air-tight duct in between.There is a diagram of it in the Phil Knox aerodynamic photos archive.
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