Superformance 1963 Corvette Grand Sport revealed

Article by Christian Andrei, on August 29, 2010

Superformance has formed a sub-brand, Duntov Motors, LLC, to develop a spot-on licensed replica of one of the most famous Corvette models of all time - the hardcore, race-spec 1963 Corvette Grand Sport.

Superformance is famous for building replicas of vintage Shelby Cobras (including Pete Brock's slippery Daytona coupe) and Ford GT40s.

Back in the 1960s, the original Grand Sport project was kept under wraps and was known only be a select few. Corvette chief engineer Zora Arkus Duntov spearheaded the project in 1962 that resulted to five examples of a race-ready 'Vette. These were quietly designed and built by Chevrolet's engineering staff.

Duntov held hopes that the GS would evolve into a factory-backed racer (and even a homologation-special production car).

But as soon as corporate directors knew of the program, they put a stop to it and sold the cars off to private race teams. All the five cars are still around today but each is worth far too much to actively drive or race.

Superformance views its Grand Sport, which closely adheres to the original car, as a continuation series.

Original blueprints for the car were obtained and the engineers crafted body molds from Grand Sport #002, which was converted into a roadster by Chevy engineers shortly before the program ended.

Press Release

1963 Corvette Grand Sport Replica Features GM Performance Parts' New E-Rod LSA Crate Engine Package

Under the leadership of the legendary Zora Arkus-Duntov, the Corvette Grand Sports took the racing world by storm in 1963. They gave Cobra drivers fits, with powerful and exotic engines created inside Chevrolet, such as an all-aluminum 377-cubic-inch powerplant. The special engines delivered stunning speed in the lightweight, purpose-built chassis.

Only five Grand Sport race cars were built, but their legacy lives on in countless replicas created in the decades since the originals rolled into the paddock for the last time. The most authentic Grand Sport recreation models – including coupe and roadster versions – are the GM Official Licensed Products examples built by Superformance LLC (www.superformance.com), which offers a variety of GM Performance Parts (GMPP) crate engines in them.

At the 2010 SEMA Show, GM Performance Parts (GMPP) introduced the new E-ROD LSA crate engine package (part number 19257460) in a Superformance Corvette Grand Sport coupe. Packing 556 supercharged horsepower, the E-ROD LSA exemplifies the extreme performance that is available with the E-ROD portfolio.

The E-ROD LSA system will be available after the first quarter of 2011. GMPP is working with the California Air Resources Board (CARB) to secure an Executive Order to allow the E-ROD LSA to be used in pre-OBD-II vehicles (1995 and earlier). GMPP engineers are working with CARB to develop a process to have E-ROD systems, including the E-ROD LSA, approved for specially constructed vehicles – such as the Superformance Grand Sport – in California.

"The Grand Sport Corvette is such an iconic vehicle, that it's great to see Superformance bring back this classic as a kit car," said Dr. Jamie Meyer, product integration manager for GM Performance Parts. "It offers the same styling and raw performance feeling as the original, and when outfitted with an E-ROD engine, the end consumer gets a much more modern ride. The performance of this car is amazing."

Indeed, with a curb weight of about 2,500 pounds, the E-ROD LSA's 556 horsepower gives the car a power-to-weight ratio of only 4.5:1 – or, 1 horsepower for every 4.5 pounds of mass. That's better than Ferrari 599 GTO's 5.3:1 ratio.

The E-ROD LSA brings a modern level of driving ease and comfort to the classic Grand Sport design. That's complemented with other amenities including air conditioning, leather upholstery and a smooth-shifting Tremec six-speed manual transmission.

On the outside, the Grand Sport re-creation wears historically inspired Admiral Blue paint and bright white stripes, along with wheels based on the design of the original Grand Sport race cars. Also authentic to the originals is the set of side exhausts, which emit a suitable rumble for this barely tamed street car.

Working with Superformance LLC and Duntov Motor Company, the replica parts have been painstakingly reproduced including the chassis, body parts and all accessories needed to replicate the original Grand Sports theme. With the support of GM Performance Parts and GM Official Licensed Products, the coupe and roadster editions are offered in street and racing versions. Each GS is available as a complete TKM (turn key minus) vehicle, awaiting the customer's choice of engine and transmission.

Vehicle highlights include:

  • GMPP E-ROD LSA supercharged 6.2L engine rated at 556 hp and 551 lb-ft of torque
  • Tremec six-speed manual transmission
  • Custom rear axle housing, with Dana 3.36:1 gears
  • Ceramic-coated custom headers and side pipes
  • Four-wheel disc brake system, with four-piston calipers at all corners
  • Period-correct Grand Sport racing wheels
  • Exterior paint in Admiral Blue, with bright white stripes
  • GM gauge cluster with 200-mph speedometer
  • Leather-appointed seating.

The Grand Sport Replica and its 556-hp supercharged crate engine deliver the hard-driving excitement of the original race cars, with all of the performance-minded, hand-built enthusiasm that created them in the first place.

Zora would be proud.

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