Spy Photos: 2013 Ford Mustang ShelbyOnly a month after the unveiling of the 550-plus-hp 2012 Chevrolet Camaro ZL1, word is leaking out that Ford will substantially advance the muscle-car wars with a 2013 Shelby GT500 making a pants-bursting 600-plus horsepower.Our well-informed sources say the stratospheric output figure, which could be as high as 620 horses, is the result of boring out the current 5.4-liter V-8 to 5.8 liters and swapping the existing Eaton M112 supercharger for the same firm’s more-efficient and quieter TVS unit. This supercharger, with its four-lobe rotors, is the blower of choice for the Audi S4, Cadillac CTS-V, Chevrolet Corvette ZR1 and, interestingly, the Camaro ZL1.
Spy Photos: 2013 Ford Mustang ShelbyThe 5.4-liter in the current GT500 makes an already pretty absurd 550 hp. The car rips to 60 mph in 4.1 seconds and through the quarter-mile in 12.4. Based solely on the horsepower increase, we estimate that the 2013 model will drop almost half a second through the quarter, for a 12.0-second run. As it is already traction limited, we don’t see the 0-to-60 number changing much. We do, however, anticipate that it’ll be a straight-up bitch to launch consistently, at least without the addition of a launch-control system. If it isn’t limited to 155 mph, as the current car is, the 2013 GT500 should be capable of topping 190 mph.
