Corvette Stingray whipped up to 627 hp by Callaway

If you under promise and over deliver, you can never disappoint people, and apparently the tuning mavens at Callaway know that lesson well. When the company announced its latest tuned Corvette a few months ago, it said that it would have roughly 620 horsepower and at least 600 pound-feet of torque. That would have been impressive gains over the stock 'Vette by itself, but the new supercharged sports car has actually been rated at 627 hp and 610 lb-ft as its final specs. Job well done.

The key to the latest Callaway Corvette is its 6.2-liter supercharged V8 that gets a redesigned, patent-pending supercharger with a new intake manifold and an intercooler with three liquid-to-air cooling elements. The supercharger housing also protrudes through the hood to aid cooling even more.

According to the dyno (right), Callaway's Corvette reaches its peak 627 hp at 6,400 rpm, an additional 167 hp over the standard car and 23 hp less than the upcoming Z06. The Callaway's max 610 lb-ft comes on about the same time as the stock 'Vette at around 4,400 rpm. However, the supercharged engine has an impressive 145 lb-ft more than normal, but 40 lb-ft less than the Z06. The tuning company claims that it uses the same SAE-certified power correction method as Chevrolet to calculate the specs.

With the numbers official, the latest Callaway Corvette is now in production, and the company is already shipping them out to waiting customers. Prices start at $22,995, plus the cost of the donor car.