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GM debuts 2014 Stingray; direct injection, cylinder deactivation, CVVT contribute to more power and reduced fuel consumption

14 January 2013

2014-Chevrolet-Corvette-043-medium
2014 Corvette Stingray. Click to enlarge.

GM staged the debut of the all-new, 7th generation Chevrolet Corvette Stingray on the eve of the Detroit Auto Show. The 2014 Corvette Stingray is the most powerful standard model ever, with a new LT1 6.2L Small Block V8 delivering an estimated 450 hp (335 kW) and 450 lb-ft of torque (610 Nm). The new LT1 combines advanced technologies, including direct injection, Active Fuel Management (cylinder deactivation), continuously variable valve timing and an advanced combustion system that delivers more power while using less fuel.

The Stingray accelerates from 0-60 in less than four seconds and achieve more than 1g in cornering grip; it is also expected to be the most fuel-efficient Corvette, exceeding the EPA-estimated 26 mpg (9.05 l/100km) of the current model.

The all-new Corvette Stingray shares only two parts with the previous generation Corvette. It incorporates an all-new aluminum frame structure that is 57% stiffer and 99 pounds (45 kg) lighter than the current steel frame structure, as well as a new powertrain and supporting technologies. Highlights include:

  • Cq5dam-1.web.1280.1280
    2014 6.2L V-8 VVT DI (LT1) Direct Injection Fuel System for Chevrolet Corvette. Click to enlarge.

    The new LT1 generates 50 lb-ft more low-end torque than the previous 6.2L engine, matching the 7.0L LS7 engine from the 2013 Corvette Z06 from 1,000 to 4,000 rpm.

    The LT1 is backed by a choice of active exhaust systems that are less restrictive than the previous generation, due in part to an increase in diameter from 2.5 inches to 2.75 inches. The standard system offers a 13%improvement in airflow and features a pair of butterfly valves that contribute to greater refinement at cruising speeds when the engine is operating in fuel-saving V-4 mode.

    An available dual-mode active exhaust system offers a 27% improvement in airflow. It features two additional valves that open to a lower-restriction path through the mufflers. When open, these valves increase engine performance and produce a more powerful exhaust note.

    More than 10 million hours of computational analysis went into the new Small Block’s design, including more than 6 million hours alone on the combustion system.

    The engine is paired with an industry-exclusive seven-speed manual transmission with Active Rev Matching for more precise up and down shifts.

  • Advanced driver technologies, including a five-position Drive Mode Selector that tailors 12 vehicle attributes to the fit the driver’s environment.

  • Lightweight materials, including a carbon fiber hood and removable roof panel; composite fenders, doors and rear quarter panels; carbon-nano composite underbody panels and the new aluminum frame help shift weight rearward for an optimal 50/50 weight balance that supports a world-class power-to-weight ratio.

    use of composite materials, including carbon fiber the hood and roof panels, lightweight Sheet Molded Compound for the fenders, doors and rear quarter panels, and carbon-nano composite for the underbody panels help reduce the weight of the body by a 37 pounds (17 kg).

  • The greater torsional rigidity of the frame reduces unwanted noise and improves ride and handling.

  • An interior that includes carbon fiber, aluminum and hand-wrapped leather materials, two new seat choices—each featuring a lightweight magnesium frame for exceptional support—and dual eight-inch configurable driver/infotainment screens.

The new Corvette Stingray will be built at GM’s Bowling Green, Ky., assembly plant, which underwent a $131-million upgrade, including approximately $52 million for a new body shop to manufacture the aluminum frame in-house for the first time.

The 2014 Corvette Stingray coupe goes on sale in the third quarter of 2013.

January 14, 2013 in Engines, Fuel Efficiency, Materials, Weight reduction | Permalink | Comments (10) | TrackBack (0)

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Comments

It's starting to look like someone took a Camaro and tried to give the front end a European-wanna-be, sports car nose job.

They should make one with a 3L diesel in it.
And then one with a 2L diesel - and see where they end up.

(Just for Europe.)

I'd like to see them put in a 2.0liter I4 with an output in the 320hp range. Also, a rear mounted transmission would be cool as it would give the car better balance while allowing it to be shorter and lighter.

The C7 does have a rear mounted transmission (transaxle).
A 3 L diesel engine is heavier than a LS3 engine.
Most people who would like a fuel efficient car with a diesel engine, wouldn't buy a Corvette. (One could also ask for a Corvette with pedals: http://en.wikipedia.org/wiki/Twike )

It looks too edgy and angry

The "small block" denotation must come from the anti-downsizing maffia in Detroit.

Finally a REALLY green car.

Carbon fiber hood and removable roof panel;
Composite fenders, doors and rear quarter panels;
Carbon-nano composite underbody panels
Aluminum frame
Carbon fiber interior
Magnesium frame seats

Wait.

These " ... help reduce the weight of the body by a 37 pounds (17 kg)."

The Corvette which was built 1955 already had composite fenders, doors and rear quarter panels and it also had a Chevy small block engine.

The aluminum frame of the Z06 saved 200 pounds, the regular Corvette was 3300 pounds versus 4000 pounds for an SL500 Mercedes roadster. So yes, they did save some weight to get better performance.

"Poop-poop!"

-Toad the Terror

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