2003 Cobra
Somebody call a Dyno service tech... 
Read my posts above. The WS6 package adds a TINY amount of power to an LT1 or LS1. This small amount of power advantage over a Z28 or T/A can be offset by build tolerances. Considering the cars are all M6's, the LS1's(Z28, ss, ws6) will dyno 300+rwhp or 345+ flywheel hp. The LT1's(z28, ss, ws6) will dyno 240-250+ rwhp or 276+ flywheel hp. The LS1 flywheel hp is way underrated by the factory, and the LT1 flywheel hp is close to accurate. Look up dyno's of stock LS1's and LT1's and you'll see what I'm talking about. BTW these #'s are averages, and you'll hear of the stray car dynoing lower or higher than the #'s I've listed. An LS1 is an LS1 is an LS1, no matter what package the car came with.
Somebody call a Dyno service tech...
Now we know why Ford wanted a S/C slapped on just to keep up with a stock LS1 fbody: Case in point LS1/Any fbody for that matter-Head/Cam/Supercharger=God
I was going off of 15% drivetrain loss. I think 20% is a bit high.....
I would hands down take a '03 Cobra over a LT1. There is no comparison
between the two.
The Best V8 Stories One Small Block at Time
Two totally different setups. It doesn't matter what a car's setup is, fast is fast. Stop making whiny ***** *** excuses and acknowledge a fast car. Stock for stock, a Cobra blows an LT1 out of the water, and will almost always run faster than an LS1. Period.
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