The track-ready Chevrolet Corvette Z06 has been unwrapped today at the North American International Auto Show (NAIAS) in Detroit. Packed with a massive 466 kW and 861 Nm of firepower, the Z06 is the most track capable Corvette the company has ever built.
The 2015 Corvette Z06 is the first model to get a supercharged engine, an automatic transmission and, thanks to a stronger aluminum frame, a removable roof panel. Under the bulging bonnet is a new, supercharged 6.2-litre LT4 engine matched with either a seven-speed manual or an all-new, high-performance eight-speed automatic transmission with paddle shifters for manual control. The aluminum frame carries over from the Corvette Stingray and will also be used essentially unchanged for the Corvette Racing C7.R.
To balance performance and efficiency, the LT4 leverages the same trio of advanced technologies introduced on the Corvette Stingray: Direct injection, Active Fuel Management (cylinder deactivation) and continuously variable valve timing.
The LT4 engine also has several unique features designed to support its higher output and the greater cylinder pressures created by forced induction, including:
- Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional heads
- Lightweight titanium intake valves and machined connecting rods for reduced reciprocating mass
- High 10.0:1 compression ratio – for a forced-induction engine – enhances performance and efficiency; enabled by direct injection
- Forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures
- Stainless steel exhaust headers and aluminum balancer that are lighter than their LT1 counterparts
- Standard dry-sump oiling system with larger cooler capacity than Z51; used with dual-pressure-control oil pump.
“The new Z06 delivers levels of performance, technology and design that rival the most exotic supercars in the world,” said Mark Reuss, president, General Motors North America. “And the Z06 leverages the engineering expertise of GM, offering the choice of two world-class transmissions, supercar performance without supercar fuel consumption, and technologies that make it easier to fully enjoy the incredible experience of driving it.”
The Z06’s seven-speed manual incorporates rev-matching technology for upshifts and downshifts, while the eight-speed automatic is tuned for fast shift-response times and smaller steps between gears to keep the LT4 within the sweet spot of the rpm band.
Putting the power to the ground is a set of Michelin Pilot Sport tyres (Sport Cup tyres with the Z07 package). The P285/30ZR19 front tires are 1.5 inches wider than the tires on the Stingray, while the 335/25ZR20 rear tires are two inches wider. The tyres are mounted on lightweight, spin-cast aluminum wheels that are also wider than the Stingray (19 x 10 inches in front and 20 x 12 inches in the rear).
The Z06 will be offered in three, increasing levels of aerodynamic downforce:
- The standard Z06 features a front splitter, spats around the front wheel openings, a unique carbon-fiber hood with a larger vent, and the rear spoiler from the Corvette Stingray’s Z51 Performance Package
- An available carbon-fiber aero package (in either black or a visible carbon-fiber finish) adds a carbon fiber front splitter with aviation-style winglets, carbon fiber rocker panels, and a larger rear spoiler with a fixed wickerbill – a small, vertical tab at the edge of the spoiler that significantly increases downforce
- The available Z07 package adds a larger winglets to the front splitter, along with an adjustable, see-through center section on the rear spoiler for track use; with this package, the Corvette Z06 delivers the most amount of aerodynamic downforce of any production car that GM has tested.
“The Corvette Z06 is a great example of the technology transfer between racing and production Corvettes,” said Tadge Juechter, Corvette chief engineer. “First, we took what we learned on the Corvette Racing C6.R and applied that to the all-new Corvette Stingray. Then, using the Stingray as a foundation, the Z06 and C7.R were developed to push the envelope of performance on the street and the track.”
The 2015 Chevrolet Corvette Z06 goes on sale in the US in early 2015.