When Ford announced the particular 2013 Shelby GT500 back in Nov the new aluminum block 5. 8lt V8 was initially rated at an incredible 650 horsepower. As if that were not enough, Ford updated the ranking last month to 662 hp and 631 lb-ft torque. Nevertheless , it looks like those numbers are not necessarily a true reflection of the brand new GT500′s horsepower rating, as lately found out by Steve Turner, editor-in-chief of 5. 0 Mustang and Super Fords magazine, at the push launch for the car last week.
In between laps at Street Atlanta and making passes in Atlanta Dragway, Turner managed to put one of the cars away for a fast dyno test and found that the 2013 Shelby GT500 put out an astounding 609 rear wheel horsepower. Factor in the fifteen percent drivetrain loss as well as the supercharged 5. 8-liter V8 will be producing closer to 715 horsepower on the crank. Even with a conservative 10 % drivetrain loss figured in, the particular Shelby would still be putting out there over 675 horsepower, well over the state rating.