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Jul 08

Callaway Corvette Stingray to have 627hp. The folks at SRT are unimpressed

When you hear Callaway you think power. Like Sledgehammer power. Of course we all knew it would be a matter of time before the Callaway gang hopped up the new Corvette Stingray. At 450hp from the factory the Stingray is no slouch. Callaway have managed to squeeze out almost 200 more hp. Almost. That brings the Callaway Corvette Stingray to 627hp. Two weeks ago we would have been impressed, but the guys over at SRT are pumping out 707 from the factory. I just thought I should point that out.
calaway stingray
Callaway has always been the expensive way to get more power from your Vette. Still for those of you that just want to have the legendary name plate on your car here’s your chance.

More pics, a fancy dynomometer print out and the details after the jump.

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.
Calaway Z28
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.
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Source: Newspress USA