OnStar Calls John Hennessey While He's Testing 650+ HP Camaro Z/28. Pulling Too Many Gs?

The Camaro Z/28 (yes, we’re talking about the fifth-gen Camaro here) must’ve been built by both GM engineers and illusionists, as this car has the ability to appear well over 1,000 pounds lighter than it really is. This is part of the mantra of a track-savvy muscle car and Hennessey Performance has taken full advantage of the badass contraption’s dynamic abilities with its HPE 650 tuning package.
OnStar calls John Hennessey while he was testing the 650+ HP Camaro Z/28 1 photo
Photo: screenshot from Youtube
In fact, John Hennessey, the founder of the Texan tuner, may have exaggerated a bit. That’s the only conclusion you can draw when OnStar calls the man while he’s out driving the machine on the track, believing John was in an emergency situation.

While John’s “I think I was pulling too many Gs in this bad boy” line is funny, the whole episode might be staged. Let’s be clear, we’re not encouraging fake OnStar calls by any means, but we still find this piece amusing.

Under the massive hood of the Z/28, Chevy has placed the 7-liter LS7 V8, which delivers 505 ponies in factory stock form. Contrary to what you might have believed judging by the “650” in the tuning package’s designation, the actual output offered by Hennessey is even greater.

As John explains after chatting with the amused OnStar operator, the massaged muscle car delivers 570 hp at the rear wheels, which means its crank output sits somewhere around 670 hp.

And for those of you who want to know what the upgrade includes, here’s the full list of goodies:

  • Ported Cylinder Heads
  • Upgraded Valvetrain Parts
  • HPE650 Camshaft
  • Stainless Steel Longtube Headers
  • Professional Installation
  • HPE Engine Management Calibration
  • Dyno Tuning & Road Testing
  • Hennessey Premium Floormats
  • Serial-Numbered Dash & Engine Plaques
  • Hennessey Exterior Badging

We're curious about the fate of the Z/28 now that the sixth-generation Camaro has landed. That's because, despite the badassery injected into the current fifth-gen model, sales of the limited-edition model haven't exactly raised up to the expectations.

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About the author: Andrei Tutu
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In his quest to bring you the most impressive automotive creations, Andrei relies on learning as a superpower. There's quite a bit of room in the garage that is this aficionado's heart, so factory-condition classics and widebody contraptions with turbos poking through the hood can peacefully coexist.
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