One would argue that the 2019 Chevrolet Corvette ZR1 is powerful enough to satisfy any Corvette enthusiast. And if that isn’t enough to quench your thirst for heavy horsepower, you can always drop by at Hennessey Performance to crank things up a notch with the unreal 1,000-horsepower HPE1000 Corvette ZR1.
Nah, that’s old news. How about the HPE1200 Corvette ZR1, currently the most powerful C7 Corvette in the world? Given that we’re just a few weeks away from a mid-engine Corvette reveal, Hennessey seems to want the front-engine model to go out with a bang. And we have no issues with that.
Because you’re addicted to horsepower and always seek more of it, allow us to show you this video of HPE completing dyno validation testing on the aforementioned HPE1200 package for the Corvette ZR1.
As you can see, HPE’s 2019 Corvette ZR1 with the HPE1200 package is good for 1139 rear-wheel horsepower and 994 pound-feet of torque at the rear wheels. However, contrary to the white HPE1000 dyno video we shared back in April, which ran Shell V-Power 93 octane fuel, this orange ZR1 achieves its power figures running Shell E85 pump fuel.
Unsurprisingly, this upgrade kit requires more extreme modifications to the 6.2-liter supercharged LT5 V8 engine, like a ported supercharger, new upper and lower pulleys and a high flow custom throttle body.
The HPE1200 package essentially picks up where the HPE1000 package stops, which already includes a pulley upgrade for the ported supercharger, a custom HPE camshaft, ported cylinder heads, new valve springs and retainers, new intake and exhaust valves, upgraded lifters and pushrods, long-tube headers, a new mid-pipe, and high-flow cats.
While the eight-speed automatic gearbox does require some strengthening upgrades, Hennessey claims the seven-speed manual transmission can withstand this much power and torque.