John Hennessey has been able to extract incredible amounts of power from Chevrolet’s V8, which he uses for the Venom Supercar. The fifth generation engine debuted in the 2014 Stingray, and Hennessey quickly developed upgrade packages ranging from 500 to 650 horsepower. As the new Silverados began to arrive, it became evident that the truck engines can use most of the same hardware to achieve unprecedented power levels in a pickup.
Now on a tour of AutoNation dealers throughout the southeast is a new HPE550 Supercharged Silverado pulling an HPE650 Supercharged Stingray. The truck features a 1.9L TVS supercharger on top of the 6.2L V8. An upgraded fuel system and dyno tuning help to create 448 horsepower at the rear wheels, which translates to more than 550 at the engine. Check out the dyno in this video, posted to YouTube by hpedesign Sept. 8:[youtube id=”dg3a4kZ3qOA” align=”center” mode=”normal” autoplay=”no”]
For the Stingray, they pulled out all the stops. The supercharger is a TVS unit measuring 2.3L, which is larger than most four cylinder engines. The 6.2L V8 is not internally modified, and the stock exhaust system is retained. With just the supercharger and engine management upgrades it produces a rubber destroying 532 HP and 539 lb-ft of torque to the wheels. Turn up your volume and check out this video of the Corvette’s dyno, uploaded to YouTube by hpedesign May 21:[youtube id=”NG8GkZ47P-c” align=”center” mode=”normal” autoplay=”no”]
What is so amazing about both of these is that the engines are not internally modified. These numbers are made using the stock camshaft, heads, exhausts and emissions control systems. Each vehicle includes Hennessey numbered badges and a 3 year/36,000 warranty. Both will be available for a ride and drive at various spots along their tour, so monitor Autofluence and Hennessey’s social media for updates.
(Source: Hennessey Performance)