I have a stock 03 Cobra Convertible. I plan on doing the following. Add an aftermarket heat exchanger, a 2.76 inch pulley on my eaton, add a lower pulley on my crankshaft, add a larger alternator pulley, add a accufab throttle body and plenum, add a set of JB shorty headers, bassani catted x pipe, borla mufflers, port my eaton supercharger, get it dyno tuned with a chip burned, add a JLT cold air induction. Please tell me what I can expect to achieve in horsepower. Lots of thanks, John.......................

 

I wouldn't know exact because i haven't screwed around with mine yet like that but, i would definately say over 500rwhp.

 

Definately hitting the 500's I'd say

I would look at the sig's around here and estimate based on their mods.

 

How large of a lower are you planning on doing?? You should be in the ball park of 460 – 480 hp with a ported eaton. There are too many variables to give you a persist number. I can tell you to save your money and not to buy the JBA headers they do actually nothing for you the stock exhaust manifolds flow quite well. If you buy a JLT make sure that you buy the Big air unit it actually works way better. Our orange car had

Steg. Stage IV Ported blower
Crowler stage3 cams
18#s of boost 6# lower and a 2.9 upper
accufab Throttle body
all the cooling modifications you could think of
a custom tune
long tube stainless works 3� system
and it only made 530 hp at the wheels
you will need fuel system modifications as well
such as 60# injectors and/ or a BAP

 

Which port you getting and whats the size of the lower pulley? If he's getting a Stage IV port with everything else he mentioned (pending the lower pulley) then 500 rwhp is deffinetly attainable and reasonable. I'm gonna guess anywhere from around 490-510 rwhp.

 

i would think around 490-500, but thats IMO

 

You should have hp equal to mine.