SEMA News—March 2013
By John Stewart
Detroit Auto Show
New Models Take Center Stage
A host of cars and trucks that could be important to SEMA-member retailers and manufacturers were debuted at the North American International Auto Show in Detroit. Among those likely to be of interest to enthusiasts and the companies that serve them are the ’14 Corvette, ’14 Lexus IS and ’14 Jeep Grand Cherokee. Also shown was a concept version of what is thought to be Ford’s next F-Series pickup. If there was a single theme to the show, it was about enhancing mileage without sacrificing performance.
The seventh-generation Corvette is said to be the fastest, most powerful standard Corvette in history. The car is powered by an all-new LT1 6.2L small-block V8, which produces an estimated 450 hp and 450 lb.-ft. of torque. The engine also generates 50 lb.-ft. more low-end torque than the previous 6.2L engine and can match the 7.0L LS7 engine from the ’13 Corvette Z06 from 1,000 to 4,000 rpm. The engine’s performance comes from advanced technologies, such as direct injection, Active Fuel Management and continuously variable valve timing.
The LT1 will be mated to either a six-speed paddle-shift automatic transmission or a TREMEC TR6070 seven-speed manual with Active Rev Matching. The Corvette retains its distinctive rear-transaxle layout for optimal 50/50 weight balance. The car is expected to be capable of accelerating to 60 mph in under 4 seconds.
The LT1 will be backed by a choice of active exhaust systems. 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 V4 mode. An optional dual-mode active exhaust system offers a 27% improvement in airflow through the use of two valves that open a lower-restriction path through the mufflers.
According to Chevrolet spokesmen, the latest Corvette represents a completely new design, sharing virtually no parts with its predecessor. Compared to the previous generation, which used hydroformed main framerails with a constant 2mm wall thickness, the new Corvette’s frame features main rails composed of five customized aluminum segments. Each segment is tuned, varying in thickness from 2 mm to 11 mm to tailor the gauge, shape and strength properties to optimize each section with minimal weight. The frame will be assembled at a new welding shop at the Bowling Green, Kentucky, assembly plant using a unique laser welding process with very fine tolerances of about 0.001-in.
Brembo will provide calipers and discs and assemble those components for each corner at its newly expanded site in Homer, Michigan. The four-piston, two-piece aluminum calipers were designed specifically for weight savings and drag reduction, with virtually no distortion from high thermal and torque loads even under the most demanding conditions. The calipers are anodized for superior corrosion resistance.
The new Corvette’s wheelbase is approximately an inch longer than the previous generation’s, with front and rear tracks that are almost an inch wider. Those changes are designed to provide greater stability, especially at high speeds, while the turning radius is decreased by approximately 2 ft. to allow for quicker turning.
The ’14 Corvette will have five driving modes that alter 12 different systems, including the optional electronic limited-slip differential that’s part of the Z51 track package. In Eco mode, the all-new V8 will shut off four cylinders for maximum fuel economy, while in Track mode, the new Corvette will pull more than 1.0 g of cornering force, Chevy engineers say.
The ’14 Corvette is expected to launch this fall. Prices probably won’t be announced until late summer.
’14 Lexus IS
The new IS offers up to four switchable driving modes—Eco, Normal, Sport and Sport S+ (S+ available on IS 350 only)—to optimize vehicle systems to suit the driver’s preferred combination of fuel economy, comfort, performance and handling characteristics.
The IS 350 RWD features the eight-speed, Sport Direct Shift automatic transmission from the IS F high-performance sedan, with quicker shifts, full torque-converter lockup and throttle blips in manual mode. The new IS is the first Lexus model to adopt G force Artificial Intelligence control in Sport mode. This system automatically selects the optimal gear and downshift pattern in response to G force and maintains the selected gear through a corner.
The all-new Lexus IS will go on sale in mid-2013.
Ford Atlas Concept
It has been widely reported that Ford intends to make extensive use of aluminum in order to make the truck about 700 lbs. lighter for fuel-economy reasons. Also to enhance fuel economy, expect that a version of the twin-turbo EcoBoost V6 will be offered along with a start-stop ignition.
The Atlas concept also sported active aerodynamic elements to clean up airflow, which is a primary culprit affecting highway mileage in boxy vehicles like pickup trucks. These elements included active grille shutters that automatically close on the highway, a drop-down air dam, and power running boards that retract when the truck is running. Active wheel shutters capable of closing at highway speeds use self-charging batteries that collect energy from the wheels’ motion. All of these ideas, and others, would save more than 2 mpg on the highway without diminishing towing or hauling capacity.
Other features showcased on the Ford Atlas concept were based on utility. There is a dual-purpose tailgate step and a dynamic hitch assist that can precisely line up the truck’s hitch with a trailer coupling. Headlamps and taillights are LED lights that are brighter and longer lasting than halogen or HID lights. The concept Atlas also has hidden cargo ramps that stow beneath the cargo box and can be quickly set up to enable easy loading of wheeled cargo.
Other utility features included multiple tie-down points integrated within the cargo box walls and load floor as well as 110-volt electrical outlets in the cargo box to charge power tools. An integrated roof carrying system adds functionality and cargo capacity.
The interior features thin, lightweight seating in comfortable leather to create extra legroom for rear passengers. “Floating” instrument pods and glove-friendly buttons and controls keep the interior functional, with rugged yet stylish design elements.
It’s not clear how many of these features will make the production version of the new F-Series pickup or what the cost will be, but it seems obvious that Ford is intent on exploring every possible option as it maneuvers to retain its lead in pickup truck sales. GM’s updated Sierra and Silverado will be on the market this summer, and the Ram 1500, recently named North American Truck of the Year, already is on dealer lots.
Jeep Grand Cherokee
The Grand Cherokee will also be offered with the 5.7L V8, which has been enhanced with variable valve timing and cylinder-deactivation technology to improve fuel economy by 5%, bringing its economy figure up to 21 mpg on the highway.
There will also be a new, eight-speed automatic transmission that boosts fuel efficiency across all powertrains while improving Grand Cherokee’s 4x4 performance with a lower crawl ratio. Further improving fuel economy is a new Eco Mode for 2014. Eco Mode optimizes the transmission’s shift schedule and, in V8 models, enables cylinder deactivation. In addition, Eco Mode activates the Grand Cherokee’s air suspension system, lowering it to Aero Ride height when the vehicle speed remains between 52 mph and 56 mph or exceeds 56 mph.
Jeep also announced that the ’14 Grand Cherokee will continue with three 4x4 systems as well as the Quadra-Lift air suspension and Selec-Terrain traction management system with a new Selec-Speed control.
Shelby Wide Body and Focus ST
Shelby American Inc. held a press conference to promote the new 850hp ’13 Shelby GT500 Super Snake Wide Body as well as the new performance-tuned Shelby Focus ST. The two cars are the newest high-performance vehicles available from Shelby American and had been previously revealed in the weeks leading up to the auto show.To produce a GT 500 Super Snake Wide Body, Shelby American boosts the performance of a stock, 662hp ’13 GT500 to a street-legal 850 hp while keeping it 50-state emissions legal and tuned to run on 91-octane pump gas. Adding Shelby’s new Wide Body option makes room for tires that can put that kind of power to the pavement. The optional Wide Body package will allow buyers to put a 345- or even a 355-profile tire at the rear, giving the Super Snake much more traction.
|Shelby American has produced a budget-minded performance car in the Shelby Focus ST.||Shelby American now offers a street-legal, 850hp GT500 Super Snake Wide Body.|
Even though the new Wide Body Super Snake will have Mustang lovers drooling, it is the return of the idea of Carroll Shelby’s beloved “pocket rocket” that may be the biggest news for driving enthusiasts. Designed in the Shelby facility next to the Las Vegas Motor Speedway, the front-wheel-drive Shelby Focus ST is a driver’s performance car with an affordable price.
A set of new Ford Racing suspension pieces lower the car, and wheel and tire upgrades improve grip and traction. Bigger Shelby spec brakes with drilled rotors enhance stopping power. The exhaust is a product of a Shelby/Borla collaboration.
According to reports, the post-title package for the ’13 Shelby GT500 Super Snake starts at $28,995 (662 hp) and $39,995 (850 hp). The Wide Body option adds another $14,995, not including the base GT500. The ’13 Shelby Focus ST post-title package begins at $14,995, not including the Ford Focus ST, and will be limited to 500 per model year.