Senin, 13 Januari 2014

NAIAS 2014 Highlights: 2015 Chevrolet Corvette Z06

The new Chevrolet Corvette C7 Z06, an uprated version of the Corvette C7, has been unveiled at the Detroit motor show.

Chevrolet's high-performance Z06 moniker first appeared on the C2 generation of Corvette, in 1963. It was followed, decades later, by the C5 Z06 and C6 Z06.

This generation of Z06, however, is the first with a removable roof, optional eight-speed automatic transmission and - more notably - a supercharged V8 engine.

Power comes from Chevy's new supercharged 6.2-litre 'LT4' V8. It utilises direct injection and variable valve timing to help produce "at least" 625bhp and 635lb ft.

In line with its high-performance nature, the LT4 in the Z06 benefits from a dry sump oiling system, ensuring the correct oil pressure is maintained in strenuous conditions.

Other notable design features of the engine include a 10:1 compression ratio, titanium intake valves, forged aluminium pistons and machined connecting rods.

Thanks to the use of a compact 1.7-litre Eaton supercharger, the LT4 is only 25mm taller than the standard LT1 engine. This helps keep the Corvette's centre of gravity low, improving its handling characteristics.

Chevrolet is yet to announce any official performance statistics for the C7 Z06, but it's likely that it'll perform in a similar fashion to the 638bhp ZR1, which accelerates from 0-60mph in 3.4sec and can reach a top speed of 205mph.

No official fuel consumption figures have been released either, but the use of cylinder deactivation should help the Z06 return acceptable figures. The standard naturally aspirated C7 is currently claimed to average 28mpg, while the outgoing supercharged ZR1 returns 19.2mpg.

In classic Corvette style, the Z06 retains the C7's standard transverse-mounted composite springs, while magnetorheological electrically adjustable dampers serve to reputedly improve both handling and ride quality. Double-wishbone suspension is used all round, with cast aluminium control arms helping reduce weight.

A 'Driver Mode Selector' offers customisable stability control, launch control, variable traction control and adjustments to the way the electronically controlled limited-slip differential locks up.

Braking power is provided by six-piston aluminium front calipers, four-piston rear calipers and steel disc brakes. Michelin Pilot Sport Cup 2 run-flat tyres are standard, mounted on 19x10 alloys at the front and 20x12 alloys at the rear.

Thanks to: Autocar

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