File this one in the “rumor” category, but Car and Driver says the next Shelby GT500 Mustang could have up to 620 horsepower. It’s no secret that Ford has to up the ante on the Shelby, or risk seeing taillights from owners of Camaro ZL1s; in the pony car wars, second place is the first loser. Car and Driver’s “inside sources” say the big jump in power comes from a larger bore on the Shelby’s V8 (up to 5.8 liters from the current 5.4) and a more efficient Eaton TVS supercharger (used, ironically, on Chevy’s Camaro ZL1).
The current Shelby GT500 gets to 60 from a standing start in 4.1 seconds, running the quarter mile in 12.4 seconds. Based on math alone, Car and Driver speculates that the new Shelby GT500 won’t be much faster to 60 due to traction limitations, but should be capable of a 12 second run in the quarter mile. The uber-Camaro ZL1 won’t hit the streets until Q1 2012, which gives Chevy plenty of time to up their ante prior to launch. Since the 2013 Shelby GT500 is still in the development stages and won’t see dealerships until long after the launch of the ZL1, it should be interesting to see who comes out as top dog for horsepower. Never mind “stop the madness”; I say bring it on.