John Hennessey Takes His Twin Turbo C8 For A Test Drive

And it's only on low boost for now, too!

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In the past couple of days, John Hennessey has been working on his twin turbo Corvette C8, running it on the dyno and doing some minor tuning.

He has now posted a video of the car out on the Hennessey development track and quarter mile.

Currently running on only 5 PSI of boost, the car is making approximately 643 wheel HP and 579 wheel lbs-ft of torque. And that’s on the stock ECU tune!

In the video, Hennessey does a variety of power tests, from standing launches to roll on power tests.

The most impressive thing throughout is that the car, on the stock tune, with a variety of warning lights from not having a stock exhaust or intake, is extremely driveable and stable.

Hennessey also responds to a classic question that many ask of the performance tuner community: How much power can the transmission handle?

Hennessey Twin Turbo Corvette C8

He responds, honestly, that no one knows. It’s a new car with an untested performance ceiling, and part of what makes his job enjoyable.

He also responded that if needed, they would replace the transmission with a more hefty unit should it be needed.

It is quite a sound to hear the twin turbos spin up alongside the roar from the exhaust in sport mode. We here at Corvsport are excited to see just how far a C8 can be pushed in terms of tuning and performance.

If it’s anything like the C7, we may see in excess of 1,000 wheel HP

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