Aftermarket Tuning News

GeigerCars Corvette Grand Sport Exposed

German tuning for an American legend.

When the first Corvette Grand Sports were built in 1963, they were the ultimate factory-built racers from Chevrolet. The five cars that were made were designed to take down Shelby’s Cobras and win Sebring and the 24 Hours of Le Mans. In 1996, the historic Grand Sport name was revived with the C4 Corvette with a limited production of 1,000. The Grand Sport name again found it’s way back into production with the 2010 Corvette, and sports many high-performance Z06 upgrades. The GeigerCars team in Munich thought the new Grand Sport needed more racecar-like performance.

Powering the GeigerCars Corvette Grand Sport is the GM LS3 6.2-liter V-8, pumping out an impressive 430 horsepower and 424 lb-ft. of torque. To up the power, GeigerCars added a 2.3-liter supercharger with a charging pressure of 0.6 BAR (8.7 PSI). With a high-pitched whine, the supercharged LS3 produces 588 horsepower and 544 lb-ft. of tire shredding torque, sending the Grand Sport to 62 mph in under 4 seconds. Top speed is drag limited to 209 mph. To handle the immense power, both fifth and sixth gears had to be overhauled, along with the installation of a dry sump oil system and differential cooler.

The GeigerCars Corvette Grand Sport also benefits from improved aerodynamics to accommodate the increase in performance. At the front and rear axles, the fenders have been widened and include additional vents for optimum brake cooling. A larger rear spoiler and front diffuser are borrowed from the Z06 model for better downforce. Along with the factory fender stripes, GeigerCars have also added graphics to the fenders, hood, and trunk for a more distinct appearance.

To give the Grand Sport better driving dynamics, the suspension had to be overhauled. The springs, shock absorbers, and sway bars have all been improved, while the battery was relocated to the rear for better weight distribution. The 355 mm six-piston front, and 340 mm four-piston rear brakes of the Grand Sport were also borrowed from the Z06, for better stopping power. New 18-inch front and 19-inch rear wheels wearing 275/35 ZR18 front and 325/30 ZR19 rubber at the rear provide enhanced traction and put all 588 horses to the road.

The base model GeigerCars Corvette Grand Sport will be available for € 66,900 (+/- 89,500 USD). For the added 588 horsepower performance upgrade, expect to shell out € 16,450 (+/- 22,000 USD), while the modified transmission ratios are an additional € 2,800 (+/-3,700 USD).



Type: LS3
Displacement: 6.2 liters
Number of Cylinders: V-8
Aspiration: Supercharged
Supercharger Displacement: 2.3 liters
Maximum Boost Pressure: 0.6 BAR (8.7 PSI)
Maximum Horsepower: 588 at 6,490 RPM
Maximum Torque: 544 lb-ft. at 4,030 RPM

Type: Six-speed manual
Drive: Rear-wheel
Optional: Revised fifth and sixth gear ratios

Acceleration 0-62 mph: Less than 4 seconds
Top Speed: 209 mph (drag limited)

Wheels and Brakes:
Front Wheels: 18-inch light alloy
Rear Wheels: 19-inch light alloy
Front Tires: 275/35 ZR18
Rear Tires: 325/30 ZR19
Front Brakes: Six-piston, 355 mm discs
Rear Brakes: Four-piston, 340 mm discs

-Wider front and rear fenders
-Additional brake vents
-Z06 front diffuser
-Z06 rear spoiler
-Factory installed fender emblems
-GeigerCars fender, hood, and trunk graphics


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