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    2014 Chevrolet Corvette Stingray Gets Its SAE Certification



    By William Maley

    Staff Writer - CheersandGears.com

    May 28, 2013

    When General Motors unveiled the new 2014 Chevrolet Corvette Stingray at the 2013 Detroit Auto Show, the 6.2L LT1 V8 was producing 450 horsepower and 450 pound-feet of torque. However, the 6.2L wasn't certified by the SAE.

    That has changed today as the 6.2L has received its SAE certification and the numbers are official: 455 horsepower and 460 pound-feet of torque. If you equip the available performance exhaust, those numbers jump to 460 horsepower and 465 pound-feet.

    “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,” said Jordan Lee, Small Block chief engineer.

    Source: General Motors

    William Maley is a staff writer for Cheers & Gears. He can be reached at william.maley@cheersandgears.comor you can follow him on twitter at @realmudmonster.

    Press Release is on Page 2


    2014 Corvette Stingray Cranks Out 460 Horsepower

    SAE certifications confirm new Corvette has most powerful standard engine ever

    2013-05-28

    DETROIT – 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.

    Additional engine features include:

    • Advanced oiling system with oil-spray piston cooling and available dry-sump oiling
    • Engine-mounted, camshaft-driven fuel pump to support the direct injection system
    • Intake manifold with “runners in a box” design that allows for high-efficiency airflow packaged beneath the Corvette’s low hood line
    • High-flow, four-into-one exhaust manifolds based on the design of the LS7 engine.

    Small Block legacy

    The 2014 Corvette Stingray’s LT1 engine is the fifth generation of the Small Block engine family, which debuted in the Corvette in 1955. It displaced 4.3L (265 cubic inches) and was rated at 195 horsepower, drawing air and fuel through a four-barrel carburetor. Five years later, Small Block power helped Corvette secure its first victory at the 24 Hours of Le Mans.

    In 2012, the Small Block-powered Corvette Racing C6.R beat Ferrari, BMW and Porsche to sweep the drivers’, team, and manufacturer championships in production-based American Le Mans Series GT class. These championships make Corvette Racing the most successful team in ALMS history, with a total of 77 class wins, eight drivers’ championships, and nine manufacturer and team championships since 2001.

    The 2014 Corvette Stingray coupe goes on sale this fall, with a convertible following by the end of the year – each sharing an all-new aluminum frame structure and enhanced chassis, as well as completely new exterior and interior designs.

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    It probably won;t make any more power...

    Even though E85 has significantly higher octane ratings, this motor won't be able to capitalize on that without the ability to change its compression ratio. E85 also has a higher specific latent heat of vaporization, which means vaporizing it cools the intake charge more -- again allowing for higher compression but similarly useless if compression cannot be raised. At the same time, E85 has a lower volume specific energy density -- 25600 KJ/liter for E85 vs 36000 KJ/Liter for Premium Gasoline -- meaning you have to burn more E85 for a given air flow rate into the cylinders and fuel economy will be notably worse.

    Turbocharged engines can easily capitalize on the extra octane ratings by simply cranking up the boost (if the ECU is programmed to do so). Naturally aspirated powerplants can't really do much to make use of Ethanol's added anti-detonant properties.

    During WWII many aircraft piston engines feature Methanol and/or water injection. The whole point of that was to increase the anti-detonant characteristics of the mixture and allow higher boost pressures to be used. This is achieved in engines with 2-speed or 3-speed superchargers using a higher supercharger ratio (higher boost) at a lower altitude than normally allowed for that ratio -- because the engine would normally have pinged and detonated at lower altitudes with denser air being forced in by a supercharger ratio intended for operation with higher altitude, thinner air. Without increasing the boost pressure, Methanol-Water systems are of little benefit. At high altitudes, where the engine is already running at the highest supercharger ratio, Methanol-Water systems become essentially useless. High Altitude fighters of the day rely on Nitrous-Oxide injection for power boost at height.

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    thanks dwight. i couldn't find it last night, but i know i saw a power rating for the 5.3L on e-85, and it was comparable to the 6.0L's power output. maybe it'll pop up again sometime...?

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    There are only two scenarios where E85 makes more power in a gasoline engine that is unmodified.

    (1) The engine is turbocharged and is capable of not just advancing ignition timing, but increasing boost pressures when it detects the use of Ethanol as the fuel.

    (2) The engine normally runs hot and loses some amount of power due to the high temperature of the cylinder walls and heads. Ethanol (or E85) burns at a lower temp. This increases power by causing the engine to operate at a lower temperature -- it's like your engine making more power in the morning than in the noon heat on a summer day.

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    • By William Maley
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      Press Release is on Page 2


      DALLAS — Chevrolet today announced the redesigned Duramax 6.6L V-8 turbo-diesel offered on the 2017 Silverado HD. This next-generation redesign offers more horsepower and torque than ever — an SAE-certified 445 horsepower (332 kW) and 910 lb.-ft. (1,234 Nm) — to enable easier, more confident hauling and trailering.
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      The intake design is another example of the advanced integration included in the 2017 Silverado HD that makes it over-the-road capable.   
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      The new engine block incorporates larger-diameter crankshaft connecting rod journals than the current engine, enabling the placement of a stronger crankshaft and increased bearing area to handle higher cylinder loads.
      An enhanced oiling circuit, with higher flow capacity and a dedicated feed for the turbocharger, provides increased pressure at the turbo and faster oil delivery. Larger piston-cooling oil jets at the bottom of the cylinder bores spray up to twice the amount of engine oil into oil galleries under the crown of the pistons, contributing to lower engine temperature and greater durability.
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      There’s also an integrated oil cooler with 50 percent greater capacity than the current engine’s, ensuring more consistent temperatures at higher engine loads.
      Segment firsts
      Re-melt piston bowl rim Venturi Jet Drain Oil Separator Closed-loop glow plug temperature control Stronger pistons with remelt
      A tough, forged micro-alloy steel crankshaft anchors the new Duramax’s stronger rotating assembly. Cut-then-rolled journal fillets contribute to its durability by strengthening the junction where the journals — the round sections on which the bearings slide — meet the webs that separate the main and rod journals.
      The connecting rods are stronger, too, and incorporate a new 45-degree split-angle design to allow the larger-diameter rod bearings to pass through the cylinder bores during engine assembly. They’re forged and sintered with a durable powdered metal alloy, with a fractured-cap design enabling more precise cap-to-rod fitment. 
      A new, stronger cast-aluminum piston design tops off the rotating assembly. It features a taller crown area and a remelted combustion bowl rim for greater strength. Remelting is an additional manufacturing process for aluminum pistons in which the bowl rim area is reheated after casting and pre-machining, creating a much finer and more consistent metal grain structure that greatly enhances thermal fatigue properties.
      Additionally, the Duramax’s pistons don’t use pin bushings, reducing reciprocating weight to help the engine rev quicker and respond faster to throttle changes.
      Lightweight cylinder heads, solenoid injectors
      The redesigned engine retains the Duramax’s signature first-in-class aluminum cylinder head design, with six head bolts per cylinder and four valves per cylinder. The aluminum construction helps reduce the engine’s overall weight, while the six-bolt design provides exceptional head-clamping strength — a must in a high-compression, turbocharged application.
      A new aluminum head casting uses a new double-layer water core design that separates and arranges water cores in layers to create a stiffer head structure with more precise coolant flow control. The heads’ airflow passages are also heavily revised to enhance airflow, contributing to the engine’s increased horsepower and torque.
      The Duramax employs a common-rail direct injection fuel system with new high-capability solenoid-type injectors. High fuel pressure of 29,000 psi (2,000 bar) promotes excellent fuel atomization for a cleaner burn that promotes reduced particulate emissions. The new injectors also support up to seven fuel delivery events per combustion event, contributing to lower noise, greater efficiency and lower emissions. Technology advancements enable less-complex solenoid injectors to deliver comparable performance to piezo-type injectors.
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      The integrated exhaust brake system makes towing less stressful by creating added backpressure in the exhaust, resulting in negative torque during deceleration and downhill driving, enhancing driver control and prolonging brake pad life.
      Venturi Jet Drain Oil Separator
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      The exhaust is cooled in a unique heat exchanger before it’s fed into the intake stream through a patented EGR mixing device, further improving emissions and performance capability. An integrated bypass allows non-cooled exhaust gas to be fed back into the system to help the engine more quickly achieve optimal operating temperature when cold.
      B20 Biodiesel Capability
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      Manufacturing
      The new Duramax 6.6L turbo-diesel engine is produced with locally and globally sourced parts at the DMAX Ltd. (GM’s joint venture with Isuzu) manufacturing facility in Moraine, Ohio.
      Allison 1000 Automatic Transmission
      The proven Allison 1000 six-speed automatic transmission is matched with the new Duramax 6.6L. A number of refinements have been made to accommodate the engine’s higher torque capacity, including a new torque converter.
      The Allison 1000’s technologically advanced control features, such as driver shift control with manual shift feature and a patented elevated idle mode cab warm-up feature, haven’t changed. Also, the Tow/Haul mode reduces shift cycling for better control and improved cooling when towing or hauling heavy loads.
      There’s also a smart diesel exhaust brake feature that enhances control when descending steep grades.
    • By William Maley
      The seemingly never-ending diesel heavy-duty truck war is back in force with Ford announcing the power figures for the F-Series Super Duty back in the summer. We were wondering when either FCA or GM would strike back. Well GM did this over the weekend by accidently and then subsequently deleting the figures for the next-generation Duramax V8 diesel.
      Truck Trend got screenshots of GM Powertrain's website where the details of the L5P 6.6L Duramax turbodiesel are there to see: 445 horsepower and 910 pound-feet of torque. Compared the 6.7L PowerStoke V8 found in the 2017 F-Series Super Duty, the updated Duramax produces 5 more horsepower but is slight behind in torque (15 down from the PowerStroke's 925 pound-feet).
      We know for sure that the new Duramax will debut a new air intake system (you can see the new hood scoop in the picture above). More air is a good thing as it means better cooling and more power.
      The Texas State Fair is this week and it has become a showplace for the various truck manufacturers to make big announcements. We wouldn't be shocked if General Motors debuts the new Duramax there.
      Source: Truck Trend

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    • By William Maley
      The seemingly never-ending diesel heavy-duty truck war is back in force with Ford announcing the power figures for the F-Series Super Duty back in the summer. We were wondering when either FCA or GM would strike back. Well GM did this over the weekend by accidently and then subsequently deleting the figures for the next-generation Duramax V8 diesel.
      Truck Trend got screenshots of GM Powertrain's website where the details of the L5P 6.6L Duramax turbodiesel are there to see: 445 horsepower and 910 pound-feet of torque. Compared the 6.7L PowerStoke V8 found in the 2017 F-Series Super Duty, the updated Duramax produces 5 more horsepower but is slight behind in torque (15 down from the PowerStroke's 925 pound-feet).
      We know for sure that the new Duramax will debut a new air intake system (you can see the new hood scoop in the picture above). More air is a good thing as it means better cooling and more power.
      The Texas State Fair is this week and it has become a showplace for the various truck manufacturers to make big announcements. We wouldn't be shocked if General Motors debuts the new Duramax there.
      Source: Truck Trend
    • By William Maley
      Previous Page Next Page We weren't expecting this, but Chevrolet has revealed the all-new 2018 Equinox tonight in Chicago. 
      The exterior borrows heavily from the Cruze and Malibu designs. Up front is a revised grille (similar to the one seen on the Cruze) with new headlights and LED daytime running lights. Around the side is a character line that swoops down and 'Equinox' name on the front doors. The back features a restyled tailgate, blacked-out pillars to give the impression of wrap-around glass, and horizontal taillights. The interior matches up with newer Chevrolet models with a floating screen (either seven or eight-inches) and either cloth or leather covering bits of the dash. One key item Chevrolet is quick to point is the dashboard is lower to provide better visibility.
      There will be three turbocharged four-cylinders on offer; a 1.5L, 2.0L, and a 1.6L diesel. The 2.0L turbo will come paired with GM's new nine-speed automatic. We're guessing the 1.5 and 1.6 will get a six-speed automatic. Front-wheel drive will come standard and an all-wheel drive system with a disconnecting rear axle when not in use will be optional. One item we're glad to see is Chevrolet dropping 400 pounds out of the Equinox.
      On the safety front, the Equinox will feature the options of surround-view camera system, forward collision warning, autonomous emergency braking, lane keep assist, and blind spot monitoring with rear cross traffic alert. Two new features will be Teen Driver (can set limits on speed and volume for your young driver) and Rear Seat Reminder (reminds you to check the back seat to prevent kids from overheating on a hot day).
      No word on pricing, but Chevrolet says the 2018 Equinox will arrive at dealers in the first quarter of 2017.
      Source: Chevrolet
      Press Release is on Page 2
      CHEVROLET INTRODUCES ALL-NEW 2018 EQUINOX
      The perfect balance of design and technology DETROIT — Call it the right balance. On the autumnal equinox today, Chevrolet introduced the all-new 2018 Equinox, a fresh and modern SUV sized and designed to meet the needs of the compact SUV customer.
      “We’ve got the strongest truck business in the industry and we’ve reinvigorated our car lineup with Volt, Cruze and Malibu,” said Alan Batey, Global Chevrolet president. “We’re applying the same customer focus to grow our crossover/SUV business — starting with the Chevrolet Equinox.”
      Today’s compact SUV customers want a vehicle that meets all of their needs, from design, connectivity and safety perspectives. The Equinox delivers on all fronts, starting with its fresh new design and all-new propulsion systems.
      Fresh, new design
      The new Equinox’s expressive exterior has a lean, muscular skin echoing the global Chevrolet design cues and sculpted shapes seen in the Volt, Malibu and Cruze. Extensive aero development in the wind tunnel influenced the sleek shape.
      It is a richer, more detailed design featuring chrome trim on all models and Malibu-inspired styling. Projector-beam headlamps are standard, along with LED daytime running lamps. At the rear, horizontal taillamps emphasize the Equinox’s wide stance, while uplevel models feature LED taillamps. 
      “Customers who previewed the vehicle early on had a strong emotional response to the sleek and sophisticated exterior design,” said John Cafaro, executive director, GM Design. “Those same themes are carried through to the interior, making the space beautifully intuitive.”
      The interior takes advantage of the Equinox’s all-new architecture to offer a down-and-away instrument panel, while a low windshield base provides a commanding outward view. New elements such as available denim-style seat fabric blend high style with high durability, while a new “kneeling” rear seat enhances functionality. With it, the bottom cushions tilt forward when the split-folding seatbacks are lowered, allowing a flat floor for easier loading.
      Connectivity
      The 2018 Equinox offers purposeful technology that helps keep passengers safe, comfortable and connected.
      Chevrolet’s latest connectivity technologies are front and center, including 7- and 8-inch-diagonal MyLink infotainment systems designed to support Apple CarPlay and Android Auto, as well as an available OnStar 4G LTE Wi-Fi hotspot. (Apple CarPlay and Android Auto compatibility is subject to their terms, privacy statements and data plan rates, as well as a compatible smartphone.)
      Safety
      The Equinox offers a comprehensive suite of available active safety technologies and adaptive crash-avoidance features that provide ease of use and peace of mind on the road.
      Teen Driver is also offered, allowing parents to set controls and review an in-vehicle report card in order to encourage safer driving habits, even when they are not in the vehicle.  
      Available advanced active safety features to enhance driver awareness on the road include radar- and camera-based adaptive technologies that can provide alerts to potential crash threats, allowing the driver to react and make changes to avoid them, including:
      New Safety Alert Seat New Surround Vision New Forward Collision Alert with Following Distance Indicator New Low-Speed Forward Automatic Braking New Lane Keep Assist with Lane Departure Warning New Rear Seat Reminder Lane Change Alert with Side Blind Zone Alert  Rear Cross Traffic Alert Turbocharged engines and more 
      A range of three turbocharged engines — including the compact SUV segment’s first turbo-diesel in North America — provides customers more choices when it comes to performance, efficiency and capability in the all-new 2018 Chevrolet Equinox.
      They include a 1.5L turbo, a 2.0L turbo — matched with GM’s new nine-speed automatic transmission — and a 1.6L turbo-diesel.
      “With three choices, customers can select an engine that offers more of the attributes that are important to them: efficiency, performance and capability,” said Dan Nicholson, vice president, Global Propulsion Systems. “The advantage for each is the power of a larger engine and the efficiency of a smaller engine.”
      The new Equinox is the first Chevrolet model in North America to use an all-turbocharged, multi-engine powertrain lineup. That includes the expected segment-exclusive 1.6L turbo-diesel that will offer customers excellent efficiency and capability.
      “It is an all-new SUV from the ground up and one that takes on the industry’s biggest competitors with a stronger architecture, greater efficiency and more technology,” said Rick Spina, executive chief engineer. “And it looks great doing it.”
      Additional vehicle highlights:
      Approximately 400 pounds (180 kg) lighter than the current model — a 10 percent weight reduction Switchable AWD system that enhances efficiency by disconnecting from the rear axle when not needed  Unique kneeling rear seat that enables a flat rear load floor and up to 63.5 cubic feet (1,798 liters) of maximum cargo space Equinox sales have reached more than 2 million since its launch and it is Chevrolet’s second-best retail selling vehicle, after the Silverado.
      The 2018 Equinox goes on sale in the first quarter of 2017 in North America. It rolls out to approximately 115 additional global markets later in the year.
      2018 CHEVROLET EQUINOX PRELIMINARY SPECIFICATIONS 
      (NORTH AMERICA)
      Overview

      Models: 2018 Chevrolet Equinox
      Body style / driveline:
      five-passenger, four-door SUV, front-engine, front- or all-wheel drive
      EPA vehicle class:
      compact SUV
      Powertrains

      Engine / Type: 1.5L turbo DOHC DI
      2.0L turbo DOHC DI
      1.6L turbo-diesel
      Block material:
      cast aluminum
      cast aluminum
      cast aluminum
      Cylinder head material:
      cast aluminum
      cast aluminum
      cast aluminum
      Fuel delivery:
      direct injection
      direct injection
      direct injection
      Horsepower (hp / kW):
      170 / 127 (GM-estimated)
      252 / 188 (GM-estimated)
      136 / 101 (GM-estimated)
      Torque (lb.-ft. / Nm):
      203 / 275 (GM-estimated)
      260 / 353 (GM-estimated)
      236 / 320 (GM-estimated)
      GM-est. fuel economy:
      31 hwy
      28 hwy
      40 hwy
      Transmission:
      Hydra-Matic 6T40 six-speed automatic
      Hydra-Matic 9T50 nine-speed automatic
      Hydra-Matic 6T45 six-speed automatic
      Chassis / Suspension

      Suspension (front): MacPherson strut with side-loaded modules, specifically tuned coil springs, direct-acting stabilizer bar
      Suspension (rear): 
      4 Link Independent Rear Suspension
      Steering type:
      Dual Rack and Pinion Electric Power Steering
      Turning circle (ft / m):
      37.4 / 11.4 (17-inch wheels)
      Brakes & Wheels

      Brake type: four-wheel disc with ABS and ESC; Duralife rotors and low-drag calipers (US)
      Wheel size and type:
      17-, 18- and 19-inch aluminum
      Exterior Dimensions

      Wheelbase (in / mm): 107.3 / 2725
      Overall length (in / mm):
      183.1 / 4652
      Overall width (in / mm):
      72.6 / 1843
      Overall height (in / mm):
      65.4 / 1661
      Track (in / mm):
      front: 62.2 / 1580
      rear: 62.2 / 1581
      Interior Dimensions

      Seating capacity: 2 / 3
      Headroom (in / mm):
      Front - 40.0/1015 (w/o SR), 38.2/970 (w/ Sunroof)
      Rear - 38.5/977 (w/o SR), 36.9/936 (w/ Sunroof)
      Legroom (in / mm):
      40.9 / 1040 (front)
      39.7 / 1008 (rear)
      Shoulder room (in / mm):
      57.2 / 1452 (front)
      55.5 / 1410 (rear)
      Hip room (in / mm):
      54.2 / 1377 (front)
      51.7 / 1314 (rear)
      Weights & Capacities

      Base curb weight (lb / kg): 3327 / 1509 (1.5L w/ FWD)
      Fuel capacity (gal / L):
      14.7 / 55 (FWD)
      TBD (AWD)
      15.5 / 58 (1.6L diesel)
      Max cargo room (cu ft / L):
      29.9 / 846 (behind rear seat)
      63.5 / 1798 (rear seat folded)
      Max trailering (lb / kg):
      3500 / 1585 (2.0L turbo)
      Previous Page Next Page
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