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Chevy reveals new IndyCar aero package

The IndyCar Series is not one that demands its participating teams and automakers to design their own chassis as they do in Formula One, but for this season, the organizers have opened it up to allow for custom aero packages. What you're looking at here is the new look of the chassis to be fielded by teams running under Chevy power. Based on the Dallara DW12 chassis – introduced three years ago and named after the late Dan Wheldon – Chevy's new package is designed for road courses and short ovals, with the speedway configuration to be revealed later. The kit features new wings front and rear and more sculpted side pods. It's also got new wedges at the back to envelop the otherwise open wheels that are a hallmark of Indy racing, a more streamlined engine cover and bigger rear bumper pods. The new package will debut at the Grand Prix of St. Petersburg that will kick off this year's championship in Florida on March 29, followed by the road-course grands prix in Louisiana, Long Beach, Alabama and Indianapolis before the new package needs to be ready for the Indy 500 late in May. Half of the teams on the starting grid this season will be running under Chevy power and are expected to use this new aero kit, with the remaining Honda teams slated to run a different package of their own. Chevrolet Debuts All-New 2015 IndyCar Aero Package Chevy-developed bodywork delivers improved aerodynamics 2015-02-17 INDIANAPOLIS – Chevrolet-powered racecars in the 2015 Verizon IndyCar Series will feature Chevrolet-developed aero packages. Chevrolet introduced the road course/short oval body design today at the Indianapolis Motor Speedway. It is distinguished from the previous racecar with new front wing elements, sculpted side pods and a new rear wing. A speedway configuration for the aero kit, designed for high-speed ovals, will be introduced ahead of its competitive debut at Indianapolis in May. "This is an important milestone in Chevrolet's involvement in IndyCar racing," said Jim Campbell, General Motors U.S. vice president of Performance Vehicles and Motorsports. "We focused on developing an aerodynamic package that delivers an balanced combination of downforce and drag, along with integrated engine performance. It's a total performance package." The new Chevy road course aero configuration delivers greater aerodynamic performance than the previous design.

Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video:    

Chevy rolls out Corvette Z06 C7.R Edition at SEMA

It's not just concept vehicles that Chevy is showcasing at SEMA this year. The Bowtie brand is also taking the occasion of the tuner expo to reveal the new Corvette Z06 C7.R Edition. The special edition of the flagship performance model pays tribute to the racing model with a series of special touches and upgrades. The C7.R edition is based on the Z06 in 3LZ trim, and comes equipped with the Z07 Performance Package, including Brembo carbon-ceramic brakes and Michelin Pilot Sport Cup 2 tires. But that's not the end of the story. It also includes special graphics, yellow brake calipers, yellow-striped black wheels, a carbon ground effects package, carbon hood section, metallic gray grilles and vents, and a black leather interior with sueded microfiber trim, Competition Sports seats, and yellow stitching. Buyers will be able to order theirs in black or yellow and in either coupe or convertible body-styles. Only 650 examples will be made, of which 500 will remain in the United States, and each of them is individually numbered starting with the VIN 700001. Of course, being based on the Z06 we already know, it packs a 6.2-liter supercharged V8 engine good for 650 horsepower and an equal measure of torque. With the Z06 pack, that translates to a 0-60 time of under 3 seconds for the automatic version and 3.2 for the manual. Related Video: Corvette Z06 C7.R Edition Pays Tribute to Racing Legacy Distinctive appearance package complements capability with special-edition style LAS VEGAS – When the Z06 rejoined the Corvette lineup in 2015 as the most capable model in the car's long, storied history, it also joined an elite fraternity of the world's most capable supercars – with performance proven on the track, including winning Car and Driver's 2015 Lightning Lap evaluation. The Corvette Z06's capability is derived in no small part from technology and experience leveraged from the championship Corvette Racing program. That connection is celebrated with the 2016 C7.R Edition. It's offered in Corvette Racing's signature yellow livery – or black – with coordinated exterior and interior accents. Only 650 will be built (500 for the U.S. market), all with the Z07 Performance Package with carbon ceramic brakes, and a specially serialized vehicle identification number.