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Old 10-13-2008, 06:39 PM
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Join Date: Dec 2006
Cobra Make, Engine: CSX 4000; Shelby aluminum FE with 58mm IDAs
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Quote:
Originally Posted by greg schroeder View Post
Pretty awesome man. That's just a loss of 32 HP from flywheel to rear tires. The Superformance exhaust must really perform well with that engine.

With that wheel HP on drag radials that's easily a mid 10 to high 9 second 1/4 mile and on any tire a nearly 140 mph range trap speed. I'd really like to see your car run at the next SECC drag day if you're up for it?
A loss of only 5% HP seems unrealistic (from flywheel to rear wheel). I believe that Roush advertises this engine as having 600 HP and 625 TQ. Something here doesn't seem to add up.

Greg, I believe you replaced your SPF sidepipes because they were too restrictive (loss of upwards of 100 HP on a big block from what I have been told). And I know others have done this, as well.

Spoooky, have you modified your sidepipes, or are you using the stock SPF pipes?
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