Callaway has been making production cars faster since the 1970s with a special focus on Corvettes . The company’s latest beast is this 2014 C7 Stingray SC627 modified with a supercharger and an innovative intercooler setup for maximum thermal efficiency. Jumping right to the good stuff, the supercharger pushes the 6.2-liter, small block V-8 to 627 horsepower and 610 pound-feet of torque. What’s more, those numbers are SAE certified. In comparison with the stock LT1 V-8, the SC627 Vette makes 167 more horsepower and 145 more pound-feet of torque.
Callaway does this by not only throwing a supercharger in the LT1’s vee, but also by keeping temperatures in check. The system uses three liquid-to-air intercoolers and a totally revised air intake system help keep things cool under heavy throttle. Callaway’s supercharger also extends past the hood, allowing for generous airflow over its top. Not to mention its size wouldn’t fit under the stock C7 hood.
The 2.3-liter supercharger has a high helix angle in a four-lobe rotor pack for compressing incoming air. A new long-runner manifold helps increase the LT1’s mid-range torque. This helps the engine make an impressive 500 pound-feet of toque at only 2,200 rpm. Its full torque peak of 610 pound-feet happens at 4,400 rpm, well within the engine’s usable rev range. For the full 627 ponies, the LT1 needs to rev to 6,400 rpm. If you’re keeping score, that’s only 23 horsepower and 40 pound-feet less than the upcoming Corvette Z06 .
Performance comes at a price, though, and the Callaway’s supercharger package starts at $22,995 – not including the cost of the stock C7 Stingray .
Click past the jump to read more about the Chevrolet Corvette SC627 By Callaway Cars.
Chevrolet Corvette SC627 By Callaway Cars
The regular C7 Corvette Stingray is no slow poke. Its naturally aspirated, 6.2-liter V-8 makes 460 horsepower and 465 pound-feet of torque when fitted with its optional performance exhaust. Zero to 60 mph times are in the high 3-second range with its top speed nearing 200 mph.
With a new look inside and out, along with a completely new chassis, the C7 Stingray is an all-new beast for Chevrolet. The new interior affords it street cred against its European and Japanese rivals it previously didn’t have. The new exterior makes it instantly desirable for onlookers.
The Stingray enjoys a relatively modest starting price of $53,000. Even when every option box is checked on the highest trim level, the price stays within the $70,000 range. Amazingly the Stingray competes with, and in most cases outperforms, its competition that sometimes cost double or triple its MSRP.
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.
NEW CALLAWAY CORVETTES IN PRODUCTION
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.