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Old 12-11-2009, 07:41 PM
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Join Date: Oct 2006
Location: Santa Cruz, CA
Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
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Quote:
Originally Posted by Dwight View Post
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
I'll take a 20% loss...still puts me at about 400 hp at the wheels. One of these days, I'll have to do a dyno to see what a Roush 402 SR/TW (bone stock) with standard SPF pipes will pull.
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