Our Scat Pack was a base model with just the extra eight-speed TorqueFlite, so you can order one with a lot more gear, including a variety of seating, technology, convenience, and entertainment options. (See the sidebar.) You can even step up to the Scat Pack Shaker package, which adds the inspired legacy hood scoop with a functional cold-air intake.
Once in Fourth, all that’s left is to ride it out. With 3.73 and a few mods, it may be necessary to upshift one more time into Fifth. This always makes us nervous because we don’t want to mess up the last shift, plus Fifth gear can be fragile and we don’t want to break the trans. Our test car did not require shifting into Fifth, but we’ve had to do so in 2011-2014 5.0 Mustangs.
The driving experience is not altogether different than Hellcat. In fact, the first third of throttle travel feels more alert and aggressive than the more powerful SRT. Moreover, full-throttle shifts sound like artillery going off with the Scat Pack’s Hellcat-inspired active exhaust system. The power comes on quickly, and when gears are shifted manually through the steering wheel paddle shifters, you better be on your game—the rev-limiter comes up quick in the first few gears. Pulling away from the intersection, you’ve got to be ginger with the gas pedal, as the tires will erupt with squealing and chirping during what we’d call normal driving.
We noticed a slight amount of wheelhop when doing a burnout in the 2015 Mustang. This seems to be common, but it can be reduced with stiffer rear bushing. In the name of proper reporting, we tried doing burnouts both ways and found both methods to be effective.
Meanwhile, a Daimler-era Chrysler rounded up all their horsepower-junkie engineers, locked them in a room, and slapped an SRT badge on the door. Like a grenade going off in a small closet, it didn’t take long for these modern-day Ramchargers to scatter buckshot through the performance ranks at GM and Ford.
If you’re looking for a good elapsed time, shallow staging is a must. Prestage, stop, collect yourself, and then carefully inch forward until you barely turn on the Stage beam. I’ve seen lots of racers dump the car in both beams in one motion, which usually results in the car being “deep” staged. Since your time starts when your front tires break the stage beam, shallow staging gives you a running start on the timing system. Shallow versus deep can be worth as much as two-tenths of a second!
To get started, select “Line Lock” in the Track Apps and follow the prompts. Once engaged, you get 15 seconds to smoke the tires—but you probably only need a third or half that time to get the job done. Be sure you have the engine revved above 4,000 when you dump the clutch; this will prevent the engine from bogging and overloading the clutch.
While the new S550 platform is a huge improvement over the previous generation when it comes to gripping through the curves and making use of all the power, Shelby American knew they could make the 2015 Ford Mustang 5.0 GT even better. Naturally, they did just that and built what you could honestly call a track ready daily driver, the 2015 Shelby GT—a 650hp supercharged beast that will shove you into the seat if you mash on the throttle or cruise all day long on the highway without a hitch.