Callaway confirms 627hp tuned Corvette Stingray

Callaway and Chevrolet Corvette go together like Shelby and Ford Mustang and because the new Corvette is still in its early years, Callaway just confirmed their latest line of upgrades that provide the Stingray with a nice dollop of extra power. The result is the Callaway Corvette SC627.

While the base 2015 Chevrolet Corvette Stingray produces 455hp and 460 lb-ft of torque without the performance exhaust, Callaway was able to boost those figures up to 627hp and 610 lb-ft of twist. This is comes thanks to a revised engine-control unit, a completely new supercharger design with a modified exhaust system, an intercooler, and other tweaks to make sure all of additions work together in unison.

For full details, check out the press release after the jump.

2014 CALLAWAY CORVETTE HP, TORQUE UPDATE: 627 bhp, 610 lb-ft

Callaway engineers have finalized Callaway Corvette powertrain management system calibration, following comprehensive vehicle testing and validation. Based on dynamometer testing with production-level components and calibration, the 2014 Callaway Corvette has been rated at 627 horsepower at 6400 RPM, a 167 hp increase over the stock Corvette baseline. Peak torque is rated at 610 lb-ft at 4400 RPM, 145 lb-ft greater than the stock LT1’s output.

Callaway uses SAE certified power correction to compute horsepower and torque for its cars and trucks, employing the same method that Chevrolet and other vehicle manufacturers use. Using standard corrected computation for power and torque, as many aftermarket manufacturers use, the Callaway Corvette SC627 would be rated at 657 hp and 639 lb-ft of torque.

The graph shown below illustrates the power increase produced by Callaway’s unique, new-for-2014 supercharger design (pat. pend.) and single acoustic chamber exhaust system. Note that horsepower increases consistently from idle to maximum engine speed, and avoids peaking at 6000 RPM. Note the broad torque curve, with output exceeding 500 lb-ft (SAE) at only 2200 RPM.

The supercharger system includes Callaway’s new intake manifold design, its new intercooler design, and a 2300cc high helix angle, four-lobe rotor pack. Callaway developed the new long-runner manifold to increase mid-range torque, producing 57 lb-ft (SAE) more than last year’s Callaway Corvette. The engineers also devised a new intercooler system with three discrete liquid-to-air cooling elements, providing unequalled inlet air cooling efficiency. Plus, by extending the supercharger housing through the hood, convective heat transfer yields additional reduction of inlet air temperature. Reducing inlet air temperature provides more oxygen molecules for a given volume of air, increasing power while helping to prevent engine-damaging detonation. However, supercharging inherently increases air temperature as it increases air pressure. Unchecked, this can result in negating the supercharger’s positive effects. Callaway’s new intercooler configuration practically eliminates this temperature increase, as proven repeatedly during product development testing on the dyno and at the race track.


As you can see in the photo below, Callaway technicians haven’t wasted any time. Now that calibration development is completed, Callaway Corvette SC627 production has commenced. Production cars have already begun shipping from Callaway’s Old Lyme Connecticut and Santa Ana California facilities.

Callaway Cars Incorporated is an automotive engineering and manufacturing corporation specializing in high performance applications. Founded in 1976, the corporation’s four core business units include Callaway Cars, Callaway Carbon, Callaway Engineering and Callaway Competition with facilities in California, Connecticut and Germany. The organization produces specialty vehicles, engineering services, and performance products that showcase technological sophistication, artistry in design, and beauty in craftsmanship.


Chris Chin

Chris Chin is the Editor-In-Chief of egmCarTech and is a regular contributor to Automobile Magazine.

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