Question regarding TQ on blown 99/01 Cobra's and 03 Cobra's

[Sonic Storm]

These 2 questions have been lingering in my mind for some time now.

First, why is it that when you supercharge a 99/01 Cobra, it yields upwards off 400+rwhp (most between 420-460rwhp) on minimal boost (i.e 8-10lbs.). However, most 03 Cobra's only dyno between 360-390rwhp stock on 8psi?? It seems the 99/01 Cobra's yield more HP when supercharged....????

Second, why is it that when you supercharge 99/01 Cobra's on minimal boost (8-10psi), HP is way up near 420-450rwhp, but torque stays down to around 400rwtq? When you up the boost on 03 Cobra's, HP and TQ usually hang near each other (i.e 450rwhp/460rwtq)? It seems that 03 Cobra's yield more TQ????

:shrug:

 

[SVTman74]

On 99-01 cobras they are using centrifugal type blowers, and the 03 are using positive displacement blowers, I am no enginner, but I believe intake charge temp is a key factor regardless of inter cooling. one is cooler than the other, though for some reason the centri acts like a turbo, and the roots type acts differently giving you more torque, hell my sc came with 330 ft-lbs of tq stock but only 230 HP with the m-90 roots from eaton. It is also in the tuning and heads and cam . FORD tuned the cobra to be near 400 hp

 

[TTAFB_SVT]

Not to mention the 03 has heads and cams designed specifically for torque.