A centri runs away on the big end. PD sprints ahead down low, but is it enough to hold off the charge of a centri up high? After all, for the majority of any race you spend more time in the upper RPM's then down low.
http://www.mustangandfords.com/project-vehicles/mmfp-0501-ford-modular-motor-forced-induction/
Ummmmm....yeah, nice try. The stock Eaton M112 and The Vortech T-Trim aren't exactly the same class of supercharger by any stretch.
A Vortech S-Trim would be a lot more even comparison with the Eaton M112, but of course there wasn't one offered in their "unbais testing".
Ironically, even still the Eaton stayed ahead of the much bigger T-Trim in torque production until 5,250RPM, where the Vortech's deeper breathing nature finally took over. Curious to note at 2,500RPM the Vortech was only seeing 1.9psi vs the Eaton's 12.3? As far as street driving goes....well, by 5,450RPM, you're already about 80% through your usable RPM range....so you're really gonna have to leg that one out if you want to let that T-Trim shine.
I did however noticed that you conveniently left out the the Kenne Bell 2.2L (which even itself has now been outdated for years) vs the Vortech T-trim comparison that also went head to head in this showdown.
The horsepower and torque peaks between these two similarly size blowers are what was outlined by Will and myself, within 21hp of one and other (which in the 700hp range , is pretty much a wash really), but the Kenne Bell makes a much fatter torque much lower and longer in the power band with a higher peak to boot. By the time that 21-extra horsepower the T-Trim is noticed, the race is over and the Kenne Bell equipped car is on it's way back to the pits!
*they didn't do a Vortech Vs Kenne Bell comparison, so you'll just have to look at the two and compare*
And since were're taking excerpts from this article, I was particularly fond of this one...
In terms of bolt-ons, the Kenne Bell twin-screw is tough to beat. Offering a considerable chunk of additional boost and power potential combined with the immediate boost response you've come to love, the twin-screw can easily push your Cobra into the 10s. The Vortech centrifugal supercharger will easily produce more peak power than the Eaton (by a solid 200 hp or more), but that explosive top end charge is going to come with a penalty in low speed torque.
Fans of the centrifugal will love the never ending power surge, but whether Cobra owners will be willing to give up all that glorious torque remains to be seen.