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Old 12-11-2009, 07:30 PM
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Dwight Dwight is offline
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Join Date: May 2001
Location: Florence, AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
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Keith Craft told me that a 20% loss was average for Cobras. He had dyno'ed motors and then installed them it Cobras. Then dyno'ed the car.

I think because of the way they are made, sidepipes are the largest contributories to horsepower loss. Some have an 1 7/8" core with a lot of packing. Other have 3" core and little to no packing.

Dwight
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