Shelby GT 500 Upgrade by Kennedy’s Dynotune
Pictured above is our customer John Tobin’s 2007 Shelby GT500. John, never one to be satisfied with the ordinary, brought this car to us brand new in the search for even more performance. As received, it made 457rwhp on our Dynojet. As with the Ford GT, Ford underrated the GT500 – this translates to well over the 500 engine hp claimed by Ford. John has us install a Steeda pulley and perform a dynotune. The results are graphed below. As you can see, after the upgrade the car made 513rwhp – a gain of 56rwhp, more than 12%. This is with a conservative tune, the drivability is even better than stock!
457 Rear Wheel Horsepower
453 Ft.-Lbs. of Torque
513 Rear Wheel Horsepower (12% increase)
515 Ft. Lbs. of Torque (13% increase)