Tested: 2023 Chevrolet Corvette Z06

From the November 2022 difficulty of Automotive and Driver.

Round right here, we sit via loads of shows about automotive tendencies. Charts and speeches element the long-term march to electrification and the way the transfer towards small-displacement, turbocharged engines is bridging the hole till we get there.

We hear boasts about platform sharing and manufacturing efficiencies realized. What no firm ever says is, “You understand what we determined to do? Draw up a big-ass V-8 that revs to one million and can solely go in a single model of 1 model. We’ll construct it by hand, and just about not a single half will likely be appropriate with anything. It will have approach much less torque than its predecessor, and it will worsen gasoline economic system. However no person will care as a result of it’s going to sound so righteous at 8500 rpm that you will overlook your personal identify.” We is perhaps paraphrasing slightly, however that primarily is Chevy’s pitch for the 2023 Corvette Z06 and its singular LT6 V-8. We will not imagine Basic Motors really constructed this factor, and possibly neither can GM.

Chevrolet might have powered the brand new Z06 with an evolution of its supercharged 6.2-liter V-8, which made as a lot as 755 horsepower within the previous-generation Corvette. That may have been straightforward and efficient, the plain transfer. As a substitute, engineers began from scratch on a naturally aspirated 5.5-liter screamer with a flat-plane crankshaft and 32 valves. At a heady 8400 rpm, the LT6 generates 670 horsepower the all-natural approach, and it makes its 460 pound-feet of torque at 6300 rpm, almost the redline in a daily Stingray.

From the second the engine barks to life, it sounds impatient, its ragged flat-plane idle suggesting a pit stall on the Rolex 24 at Daytona or maybe a pair of Suzuki Hayabusas sitting at a stoplight. Whereas the Stingray’s pushrod LT2 V-8 makes use of bimodal muffler valves—loud or quiet, a binary determination—the Z06’s muffler valves can frequently modify in two-degree increments, fine-tuning the sound. Huge open, it appears like a Ferrari 458 Italia that hit puberty. An engineer instructed us that in testing on the Nürburgring, the Z06’s wail may very well be heard all the best way round its lap. The Nürburgring, we must always level out, is sort of 13 miles lengthy.

The LT6 was code-named Gemini throughout growth, however not as an homage to the Chevy Gemini offered in South America within the Nineteen Eighties and recognized hereabouts because the Chevrolet/Geo Spectrum. No, it is a reference to the moon-shot NASA program, as a result of that is what this engine represents for the Corvette. There is a steep studying curve when your new V-8 is able to 573 combustion occasions each second on the 8600-rpm gasoline minimize. For those who’re compiling a listing of GM V-8 firsts, loads of them from the previous 30 years or so belong to the LT6. Twin throttle our bodies and consumption plenums. Gasoline injectors on the exhaust facet of the cylinders to assist high-speed air-fuel mixing. An 8500-rpm redline. The LT6 revs so quick that Chevy in-built a mode to tranquilize the throttle whenever you’re choosing the rpm for launch-control begins, lest you blow previous your supposed goal by 1000 rpm. Once we congratulated one GM engineer on the LT6, the response was, “Congratulate me if it nonetheless runs after 150,000 miles.” However, this engine has seen loads of sturdiness testing whereas powering the C8.R race automobile for 2 seasons.

We did not put 150,000 miles on it, however we ran this Z06 seventieth Anniversary convertible loads exhausting with nary a hiccup, and boy, did it put up some numbers. Its 2.7-second 60-mph time is a snapshot of a celebration that is simply getting began, as evidenced by the Z06’s 10.7-second quarter-mile at 129 mph. The Z06’s quick 5.56:1 final-drive ratio helps fireplace it off the road, however we’ll have an interest to see whether or not a automobile with the usual Aero package deal will get to, say, 160 mph faster—this automobile wore the $8495 Carbon Aero package deal that helps generate 734 kilos of downforce at 186 mph, and people spoilers and underbody strakes precise a toll in drag at greater speeds. One clue on that entrance: Commonplace Z06s get a $2600 gas-guzzler tax, whereas vehicles with the Aero package deal are hit with a $3000 penalty. We averaged 12 mpg (the EPA metropolis determine), making the 19-mpg EPA freeway score appear mighty optimistic.

Though this explicit automobile embodies a traditionally mellow Corvette spec—an automated convertible—the Z06 construction is so stiff that the suspension calibrations match the coupe’s. And on its Michelin Pilot Sport 4S ZP tires (275/30ZR-20 up entrance and comically monstrous 345/25ZR-21 in again), the Z06 pulled 1.12 g’s on the skidpad and stopped from 70 mph in 144 ft. So go forward and deal with your self to the droptop. You are not precisely buying and selling efficiency for type, though you do miss out on gawking on the LT6. As with the Stingray, Z06 coupes show their engine underneath glass. Convertibles have a canopy for the highest mechanism that hides the engine, even with the convertible tonneau raised. As recompense, you are handled to an extra-loud serenade from the LT6 in case you put the highest up or down whereas the automobile is in movement (at as much as 30 mph), because you’re primarily driving with the hood open.

As with earlier Z06s, this one is a holistic track-attack particular, with plentiful chassis upgrades to reap the benefits of the newfound horsepower. The physique is 3.6 inches wider than the Stingray’s, making room for these big tires and a wider monitor. The cooling system is upgraded with two additional warmth exchangers, one in every of which is entrance and heart and features a detachable grille panel to maximise airflow throughout monitor classes. Six-piston brake calipers squeeze Brembo 14.6-inch rotors up entrance, and the rear finish will get 15.0-inch rotors. The optionally available carbon-ceramic brakes ($8495) on our take a look at automobile are even greater—15.7 inches in entrance and 15.4 out again—and completely indefatigable on a monitor. Put the automobile in Tour mode with the highest down, gently blast some Gordon Lightfoot with the seat heaters blazing on a recent fall night, and it is easy to overlook you are on the wheel of a hardcore monitor maniac, a automobile that may flip unapologetically sociopathic with the change of a few settings.

It recalibrates your expectations, the Z06. At first, 8500 rpm appears nutty, however quickly sufficient you end up hitting the 8600-rpm rev limiter as a result of it is pulling exhausting all the best way there (the LT6 looks like it might be blissful to go to the far facet of 10,000 rpm, had been it not for guarantee concerns). There’s a lot lateral stick that you just’re nearly shocked when it seems to have limits, and the entrance and rear ends start a dance to see who’ll relinquish grip first. It is just like the Z06 channels the high-winding spirit of the sixth-gen Z06, however with a lot extra sophistication. That is the Ferrari that Ferrari does not make anymore.

It is priced prefer it too, subsequent to its Bowling Inexperienced brethren. This convertible carries a base worth of $116,795, and choices introduced it to $162,510. The ceiling is greater in case you care to discover the salutary results of carbon-fiber wheels or deal with your self to the complete Z07 Efficiency package deal. However what is the competitors? An Audi R8 Spyder might be the closest factor, and that prices much more and is down almost 100 horsepower.

Corvette engineers might have constructed a forced-induction Z06 that was extra highly effective than this. That may have been straightforward. As a substitute, they chased a subjective expertise, the howling mid-engine unique fantasy all of us carry in our heads. In opposition to all odds, they made it actual.

Counterpoints

Driving the brand new Z06 is slightly just like the scene in Talladega Nights when Will Ferrell shares the cockpit of his ’69 Chevelle with a mountain lion. “For those who’re scared, that lovely loss of life machine will do what God made it to do—specifically, eat you with a smile on its face.” Depart the Z06 in Tour mode and it is nearly as if there is not a mountain lion within the automobile with you. Till you mash the accelerator. Then there are a dozen cougars roaring within the cockpit. —Jack Fitzgerald

It ought to be the quickest factor on earth, however it’s solely actually, actually quick. Then there’s the trip high quality: Do that you must pee? It is worse now. And, as in all eighth-gen Corvettes, the inside appears designed for divorcing {couples}—there is a wall between us emotionally, and likewise within the automobile. As of late, most sports activities vehicles are grand tourers, however not the Z06. Wrestle it into submission. Let ’em hear you with the roar that precedes tornadoes. Each shift is a whip crack, such as you’re Indiana Jones. This can be a bar battle on wheels. Your life has been too straightforward. Tackle a problem. —Elana Scherr