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Max Sluiter
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Join Date: Mar 2006
Location: So Cal
Posts: 19,574
Unequal lengths can be theoretically "tuned" to provide a more linear power curve than equal length headers in regards to flat spots. The different lengths each have different resonant frequencies (provided they are not different in length by multiples of wavelengths) for standing low pressure waves at the exhaust valves. Therefore, the rev range where one makes power can be canceled out by others not. The curve will be smoother but a little less powerful at peak than the equal length headers.
1971 chassis, 2.7RS spec MFI engine, suspension mods, lightened

Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
Old 06-19-2009, 01:19 PM
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