2014 Corvette Stingray engine is SAE-certified at 455 hp

Article by Anita Panait, on June 10, 2013

The LT1 6.2L V-8 engine that powers the 2014 Corvette Stingray is now SAE-certified at 455 hp (339 kW) and 460 lb-ft (624 Nm) with the standard exhaust system, Chevrolet has disclosed.  The same engine boosted by the available performance exhaust system is also now SAE-certified at 460 hp (343 kW) at 6,000 rpm and 465 lb-ft of torque (630 Nm) at 4,600 rpm.

The LT1 6.2L V-8 engine now holds the highest standard power ratings ever for the Corvette. Aside from that, the LT1 engine boasts of fuel efficiency that is expected to exceed 26 mpg on the highway. Jordan Lee, Small Block chief engineer, described that the LT1 engine of the 2014 Corvette Stingray as “a triumph of advanced technology,” as it delivers more power and torque with greater efficiency.

He remarked that the engine’s performance complements the Corvette’s low mass with “a tremendous feeling of power that builds as the rpm climbs.” This results to a driving experience that involves more power and acceleration than ever before. He noted that the power and torque of the LT1 surpasses many up-level engines offered by rivals.

The LT1 engine boasts of providing 74hp per liter, which it offers greater power density than the C6 Corvette’s LS3 6.2L engine and the C6 Z06’s racing-derived 7.0L LS7. Its torque is also comparable to the LS7 at up to 4,700 rpm, with a peak within 5 lb-ft of the 7.0L engine. The LT1 generates this torque early and sustains it across the rpm band, with 316 lb-ft available at only 1,000 rpm and 90 percent of peak torque available from 3,000 rpm to 5,500 rpm.

This amount of torque is more than enough to endow the Corvette Stingray with superb acceleration at all speeds. According to Chevrolet estimates, the Corvette Stingray could accelerate from zero to 60 mph in less than four seconds. This exceptional performance and fuel efficiency could be attributed several advanced technologies like direct injection, Active Fuel Management and continuously variable valve timing.

Ed Welburn, GM vice-president of global design, noted that the "Stingray” is considered as one of the hallowed names in automotive history. Thus, GM couldn't use such a moniker unless the new car is deserving of the legacy. This led to the creation of a new Corvette Stingray that disrupts tradition while still being recognizable as a Corvette.

Chevrolet is planning to build the new Corvette Stingray at GM's assembly facility in Bowling Green, Ky. To prepare for the production, GM spent $131 million to upgrade this assembly site, including around $52 million to build a new body shop for the in-house production of the aluminum frame. Chevrolet

Tadge Juechter, Corvette chief engineer, remarked that the new vehicle represents the future of modern performance cars as it offers higher levels of power, fuel efficiency and driving excitement – for a greater degree of performance. He added that the 2014 Corvette Stingray boasts of offering the best among any standard Corvette -- acceleration, braking performance, track capability, cornering grip and even fuel economy.

Helen Emsley, interior design director, quipped that the interior of the new Chevrolet Corvette Stingray offers more connected and more engaging driving experience thanks to the harmonious fusion of fine materials, craftsmanship and advanced technologies.

Press Release

2014 Corvette Stingray Cranks Out 460 Horsepower

The 2014 Corvette Stingray’s all-new LT1 6.2L V-8 engine is SAE-certified at 460 horsepower (343 kW) at 6,000 rpm and 465 lb-ft of torque (630 Nm) at 4,600 rpm, with the available performance exhaust system, Chevrolet announced today.

The Stingray is SAE-certified at 455 horsepower (339 kW) and 460 lb-ft (624 Nm) with the standard exhaust system. They are the highest standard power ratings ever for the Corvette, delivered with efficiency that is expected to exceed 26 mpg on the highway.

“The 2014 Corvette Stingray’s LT1 engine is a triumph of advanced technology, delivering more power and torque than ever before with greater efficiency,” said Jordan Lee, Small Block chief engineer.

“The LT1’s performance complements the Corvette’s low mass with a tremendous feeling of power that builds as the rpm climbs. Drivers will experience more power and acceleration than ever before with the standard engine – in fact, its power and torque surpass many uplevel engines offered by competitors.”

At 74 horsepower per liter, the LT1 has greater power density than the C6 Corvette’s LS3 6.2L engine and even the C6 Z06’s racing-derived 7.0L LS7. It also produces comparable torque to the LS7 – up to 4,700 rpm – and its peak torque is within 5 lb-ft of the 7.0L engine. That torque is generated early and sustained across the rpm band, with 316 lb-ft available at only 1,000 rpm and 90 percent of peak torque available from 3,000 rpm to 5,500 rpm – giving the lightweight Corvette Stingray excellent acceleration at all speeds.

Chevrolet estimates the Corvette will run from 0 to 60 mph in less than four seconds.

The new LT1 engine’s high output, and high power density and efficiency are due to several advanced technologies, including direct injection, Active Fuel Management and continuously variable valve timing, which support an advanced combustion system.

Direct injection is a primary contributor to the engine’s combustion efficiency, ensuring a more complete burn of the fuel in the air-fuel mixture. That’s achieved by precisely controlling the mixture motion and fuel injection spray pattern. Direct injection also keeps the combustion chamber cooler, which allows for a higher compression ratio. Emissions are also reduced, particularly cold-start hydrocarbon emissions, which are cut by about 25 percent.

Active Fuel Management, or cylinder deactivation, is a first-ever application on Corvette. It helps save fuel by imperceptibly shutting down half of the engine’s cylinders in light-load driving. Continuously variable valve timing is refined to support the LT1 AFM and direct injection systems to further optimize performance, efficiency and emissions.

These technologies support the all-new, advanced combustion system, which incorporates a new cylinder-head design and a new, sculpted piston design that is an integral contributor to the high-compression, mixture motion parameters enabled by direct injection.

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