Deep dive: 2023 Chevy Corvette Z06 V-8 features most powerful naturally aspirated production V-8 ever

Deep dive: 2023 Chevy Corvette Z06 V-8 features most powerful naturally aspirated production V-8 ever

The 2023 Chevrolet Corvette Z06 debuted earlier this week with some impressive features, including the most powerful naturally aspirated production V-8 ever. Engineering Explained host Jason Fenske provides a deep dive into this 5.5-liter V-8, and compares it to the old Z06’s supercharged engine.

Code-named LT6, the C8 Z06 engine produces 670 hp at 8,400 rpm and 460 lb-ft of torque at at 6,300 rpm. It also boasts double overhead cams, dry-sump lubrication, and a flat-plane crankshaft. It can also rev to 8,600 rpm, giving off a wail that’s more Italian supercar than American muscle while doing so.

The horsepower figure is remarkable because it beats the 6.2-liter supercharged LT4 V-8 used in the previous-generation C7 Z06. That engine was larger and boasted forced induction, but maxed out at 650 hp (at 6,400 rpm).

2023 Chevrolet Corvette Z06

2023 Chevrolet Corvette Z06

A top-speed figure hasn’t been verified, but Chevy spokesman Trevor Thompkins told Motor Authority that the 0-60 mph time will be 2.6 seconds.

Granted, the LT4 had more torque—650 lb-ft at 3,600 rpm—but Fenske noted in the video comment section that the difference can be made up via gearing. The 2023 Z06 has a 5.56:1 final-drive ratio, compared to 2.41:1 for the previous Z06.

Regardless, the LT6 V-8 is an impressive engineering achievement. Horsepower is largely restricted by how much air can be crammed into an engine, and this one can only take in air at atmospheric pressure, Fenske noted.

2023 Chevrolet Corvette Z06

2023 Chevrolet Corvette Z06

Fenske also points out some interesting details, like the hollow camshafts (to reduce inertia) and dual valve springs (for more precise valve control). The cam lobes also act directly on the finger followers with no hydraulics, providing more direct valve motion. Lack of hydraulics would normally require periodic adjustment of the valve lash (the space between the rocker arm and the top of the valve stem), but Chevy eliminated the need for that with a precisely-engineered shim that’s installed at the factory, Fenske said.

Chevy also put the direct fuel injectors on the exhaust side rather than the intake side, which allows for larger intake valves and helps with emissions, Fenske said. The intake manifold was designed to account for Hemholtz Resonance. The term describes waves of air pressure that can cause annoying sounds when a car window is rolled down or, in this case, maximize torque output.

The full video has even more details and helpful explanations of the engineering terms, so it’s definitely worth a watch.

2022 Cadillac CT5

What kind of vehicle is the 2022 Cadillac CT5? What does it compare to?

The 2022 CT5 is a stylish sport sedan with a fastback shape that ranges from entry luxury to high-end performance. It competes against strong rivals like the BMW 5-Series, Mercedes-Benz E-Class, and Audi A6, plus the Acura TLX and Lexus ES. 

Is the 2022 Cadillac CT5 a good car?

Review continues below

The CT5 is fun to drive, presents a value against its German rivals, and the new CT5-V Blackwing is a screaming performance machine. We give it a TCC Rating of 6.8 out of 10. (Read more about how we rate cars.)

What’s new for the 2022 Cadillac CT5?

The big news for 2022 is the addition of the CT5-V Blackwing model, which boasts the most-powerful Cadillac engine ever: a 668-hp supercharged 6.2-liter V-8. It also comes with a 6-speed manual or a 10-speed automatic transmission, a magnetic ride suspension, a strengthened structure, available carbon-ceramic brakes, and 19-inch summer performance tires. The Blackwing is capable of a 0-60 mph run of 3.4 seconds and a top speed in excess of 200 mph.

Also for 2022, the CT5 gets additional safety features. The automatic emergency braking system adds pedestrian detection, and the car also comes standard with rear parking sensors and a rear-seat reminder.

The CT5 cuts a sleek fastback shape with short front and rear overhangs and a bold and attractive version of Cadillac’s shield grille. Inside, a pair of digital screens for the instrument cluster and infotainment system provide a modern feel, while soft-touch surfaces accented by wood, aluminum, or carbon-fiber trim create a luxurious and sporty environment. With its mid-size dimensions, the CT5 carries four adults well, but the trunk is rather small for the class.

Buyers have a choice of three engines: The base engine is a 237-hp 2.0-liter turbo-4; an available twin-turbo 3.6-liter V-6 makes 335 hp in the Premium Luxury model or 360 hp in the CT5-V; the supercharged V-8s helps drivers rip up the pavement. All are paired with a 10-speed automatic, except for the optional manual for the CT5-V Blackwing. Fuel economy tops out at 27 mpg combined, and suffers as power rises, culminating in the very thirsty Blackwing’s 15 mpg combined.

Every CT5 handles well and offers a compliant ride thanks to a stiff, well-balanced structure inherited from the CT5’s predecessor, the CTS. Rear-wheel drive comes standard and all but CT5-V Blackwing buyers can opt for a rear-biased all-wheel-drive system. 

How much does the 2022 Cadillac CT5 cost?

The CT5 is offered in Luxury, Premium Luxury, Sport, V-Series, and V-Series Blackwing trim levels. A CT5 Luxury starts at around $38,000 and runs up to $84,990 for a CT5-V Blackwing, which can top $100,000 with options. Depending on your taste, expect to spend in the mid-$40,000s for a luxury-oriented CT5 or the mid-$50,000 range for a sportier CT5-V.

Standard equipment on the base CT5 includes synthetic leather upholstery, power front seats, a 12.0-inch digital instrument cluster, a 10.0-inch infotainment touchscreen with wireless Apple CarPlay and Android Auto, and 18-inch alloy wheels. 

Where is the 2022 Cadillac CT5 made?

In Lansing, Michigan.

The 2021 Ford Mustang Mach-E GT Is an Electric Muscle Car


2021 Ford Mustang Mach-E GT review! The 2021 Ford Mustang Mach-E GT is an electric muscle car — and today I’m reviewing it! First I’ll take you on a tour of the Mach-E GT and show you all of its quirks and features, and then I’ll drive the Mach-E GT and show you what it’s like behind the wheel.



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2022 Land Rover Range Rover, 2022 Mercedes-Benz AMG SL, 1971 Datsun 240Z: This Week’s Top Photos

2022 Land Rover Range Rover, 2022 Mercedes-Benz AMG SL, 1971 Datsun 240Z: This Week’s Top Photos

Land Rover revealed a redesigned Range Rover this week, with the new fifth-generation model to arrive at dealerships next spring as a 2022 model. While the exterior styling hasn’t changed all that much, underneath is a new platform that supports battery-electric powertrains and perhaps eventually hydrogen-electric powertrains.

2023 Chevrolet Corvette Z06

2023 Chevrolet Corvette Z06

Chevrolet’s new Corvette Z06 landed this week. The big news is the car’s 5.5-liter V-8 which features a flat-plane crankshaft and double overhead cams. The engine is related to the unit in the Corvette C8.R race car, and is the most powerful naturally aspirated V-8 in production thanks to its 670-hp output.

2022 Mercedes-Benz AMG SL

2022 Mercedes-Benz AMG SL

A new generation of the iconic SL was also revealed this week. Headed to dealerships in the first half of next year as a 2022 model, the convertible sports car has been developed by the Mercedes-Benz AMG performance skunkworks and at launch will offer the choice of two V-8 options.

Mazzanti Evantra Pura

Mazzanti Evantra Pura

Italy’s Mazzanti returned with a new version of its Evantra supercar. The newest version is designed for purists, with its focus being on low weight and pure driving pleasure.

1971 Datsun 240Z

1971 Datsun 240Z

The 1971 Datsun 240Z provides a beacon for the redesigned 2023 Nissan Z’s driving dynamics. We spent a day with one and can only pray that the modern Z’s dynamics will be influenced by its ancestor.

2023 Toyota BZ4X

2023 Toyota BZ4X

Toyota this week revealed the new BZ4X headed to showrooms in mid-2022. The BZ4X is a RAV4-sized electric crossover, and it’s just the first of seven vehicles that will be added to Toyota’s BZ sub-brand for electric vehicles by 2025.

2023 BMW X7 facelift spy shots - Photo credit: S. Baldauf/SB-Medien

2023 BMW X7 facelift spy shots – Photo credit: S. Baldauf/SB-Medien

BMW’s X7 will soon be updated to match the radical new look pegged for the next-generation 7-Series. Spy shots of a prototype reveal a completely new front-end design for the full-size crossover.

2023 Ford Escape (Kuga) facelift spy shots - Photo credit: S. Baldauf/SB-Medien

2023 Ford Escape (Kuga) facelift spy shots – Photo credit: S. Baldauf/SB-Medien

We also spotted an updated Ford Escape undergoing testing on public roads. The compact crossover is set to undergo a major facelift with updated front and rear fascias, new LED lightning, and a blockier design that ditches the current model’s rounded look.

2022 Lincoln Nautilus

What kind of car is the 2022 Lincoln Nautilus? What does it compare to?

The 2022 Nautilus crossover SUV goes for quiet luxury, with a knockout interior and top-flight tech features in its five-seat cabin. The mid-size utility vehicle rivals vehicles like the Cadillac XT5, Audi Q5, and Lexus RX.

Is the 2022 Lincoln Nautilus a good car?

Review continues below

With last year’s updates inside and out, it’s attractive and spacious, though without any hint of sporty driving feel. We give it a TCC Rating of 7.2 out of 10. (Read more about how we rate cars.)

What’s new for the 2022 Lincoln Nautilus?

Sold in Standard, Reserve, and Black Label spec, the Nautilus receives just a few minor adjustments to features for 2022. The Nautilus still wears a recently penned designer look that’s classic but not too overdone; it’s curved softly, lit with trim and subdued LEDs, and graced with a cabin that walks a fine horizontal line between simple and expressive.

Base SUVs sport a 250-hp turbo-4 and front-wheel drive, with good acceleration and a calm, soothing ride thanks to lots of sound deadening and available adaptive dampers. The 335-hp turbo V-6 on the options list makes the roadside scenery blur more, but it’s not outrageously quick nor is its suspension egregiously stiff, even when it rides on available 21-inch wheels. It’s no land yacht, more like a clipper ship, with a numb feel from the rudder.

The dressy interior tucks in room for five large passengers, and front-seat riders have more power adjustment than they’re likely to need. The cargo hold can expand to more than 66 cubic feet, and with interior Black Label themes, the Nautilus lives up to its luxury billing.

All models get automatic emergency braking, blind-spot monitors, and active lane control, with options for automatic park assist, a surround-view camera system, and adaptive cruise control. Crash-test scores are solid, but the IIHS thinks the Nautilus needs better stock headlights.

How much does the 2022 Lincoln Nautilus cost?

The $43,595 Nautilus Standard comes with front-wheel drive, power heated front seats, digital gauges, and a 13.2-inch touchscreen with wireless Apple CarPlay and Android Auto. We’d take the $49,995 Reserve model and its leather upholstery, navigation, wireless smartphone charging, and heated and cooled front seats, and add on the 13-speaker Revel audio that used to be standard on it.

Where is the 2022 Lincoln Nautilus made?

In Oakville, Ontario, Canada.