OK, I am going to try to make a long story short.
I bouhgt this car because I have been wanting an s197 since I first saw one.
I have a 95 5.0L mustang that runs great but I don't like the body style.
Now I have an 06 that I love how it looks but hate how it runs.

I bought it completaly stock. I then added a roush supercharger.
Still very slow.

I then added the smaller pulley and had it dyno tuned.

it put out 370 hp at the wheels on a mustang dyno ( they said ) 382 hp WCF
it put 327 torque at the wheels 340 torque WCF

I just got back for the track and it ran 8.7's at 82 mph With Slicks on it!!! ( 1/8 th mile of course )
and the rearend gear is stock.

The car feels very smooth and gets good milage, and I checked and I am getting 7psi of boost.

This seems very slow to me, my 95 will run much faster and it is running a centrifugal supercharger instead of the roots, so I thought the roots would make way more torque then this one does. and it only gets about 5 psi of boost.

My 95 had only 300 hp on a dynojet dyno and yet it put out 346 ft lb of torque.

Why is the 2006 putting out more hp than torque?

My tuners say the fuel and ignition are right.

anyone have some comparable hp to E/T anyone have a similar set that has been dynoed on a mustang dyno I can compare to?

what could it be? Cam timing???

I have done a leak down test on the engine ( only 36,000 miles ) and it shows perfect,
all the plugs look fine.
I have cleaned the MAF and the Throttle Body and checked for any leaks. I am at a loss.

Please help if you can

I hate loving this car and hating it at the same time.
I has put me in the poor house and I got nothing in return.

 

Something you need to remember is the 95 style is fairly lighter then the 2006 style. I would beef up the rear and hope your clutch doesnt go. the S197 platform (with the right stuff) can get low 13's to mid 12's in the 1/4 without a whole lot of stuff. You just have to be willing to shave some weight off at the track and have the right suspension set up. The car can run the times, its just not as easy as the your older vehicle