Watch the First 9-Second Quarter Mile by a C8 Corvette Stingray

C8 Corvette is equipped with a twin turbo setup, yielding more than a thousand horsepower.

The LT2 engine computer system in the C8 Chevrolet Corvette is still locked, meaning that shops are unable to properly tune them for more power. That isn’t stopping shops from adding power. We have already seen a few owners run nitrous oxide or small boost turbo systems with the stock tune. The problem with that approach is that the real world gains are fairly limited.

Extreme Turbo Systems has taken a C8 Corvette to the next level of performance, adding the supporting modifications needed to run big boost. As a result, this Torch Red Stingray packs more than double the horsepower. With a few other upgrades, that extra power made this Corvette the first C8 to run a 9-second quarter mile.

Extreme Turbo Systems C8 Corvette

This 2020 Corvette is fitted with a pair of Precision turbochargers with 46-millimeter waste gates, along with an Extreme Turbo Systems intercooler with an ice box. There are other C8s around the country with twin turbo setups that make far less power. That is because this car is also equipped with Mahle pistons, Ferrara valve train parts and a direct port methanol injection system. Those items allow this car to run bigger boost without a proper engine tune – and without melting the engine internals at high RPM. In fact, they have already tested this car with 20 pounds of boost, with the methanol adding the extra fuel needed to mix with the forced air.

In addition to the engine upgrades, this C8 Corvette is equipped with a set of Raybestos prototype clutches in the dual-clutch transmission. This allows the new transmission to stand up to the added power on a hard pull.

Hitting the Dyno

The video below from the Extreme Turbo Systems YouTube channel begins with footage of this Corvette on the dyno. It makes short, quick pulls, but it is enough to get some power numbers.

The first pull is with 13 pounds of boost, resulting in 872 horsepower and 826 lb-ft of torque at the rear wheels. On the second pull, 18 pounds of boost yields 980 horsepower and 883 lb-ft of torque and the final pull, with 20 pounds of boost, leads to 1,021 horsepower and 916 lb-ft of torque.

For comparison, the LT2 in stock form makes around 440 horsepower and 410 lb-ft of torque at the rear wheels. With 13 pounds of boost pressure, without proper tuning, this 2020 Corvette Stingray made nearly twice as much power as a stock car.

Shooting for 9s

The next portion of the video heads to the drag strip. Someone behind the camera is explaining that the transmission isn’t shifting properly from first gear to second, so they have to make that shift manually. They also aren’t doing a burnout, so the drag radial tires aren’t quite as sticky as they could be.

The first run is made on 11 pounds of boost. The driver leaves pretty gently and the 1-2 shift is a little odd, but it still runs a respectable 10.49 at 140 miles per hour. On the second run, they crank the boost up to 13.5 pounds and the driver leaves a little harder, yielding an elapsed time of 10.05 at 145 miles per hour.

Finally, the boost is raised to 15 pounds and the run goes very smoothly. As a result, this Corvette becomes the first C8 to run a 9-second quarter mile. The official time was 9.95 at 144 miles per hour, setting the record as the quickest new Stingray in the world.

This record run is being discussed in the forum. Click here to check out that thread.

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