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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.

Nissan Leaf, Chevy Volt have best sales month of 2015

Things are trending upwards for the two best-selling plug-in vehicles in the US. Both the Chevy Volt and the Nissan Leaf had their best sales month of 2015 in May, with the Volt selling 1,618 units and the Leaf moving 2,104. The upward swings come at an interesting time, with lots of excess first-gen Volts waiting for buyers and some buyers already ordering their second-gen Volts. So far in 2015, the Leaf has outsold the Volt 7,742 to 4,397. While 7,700 Leafs is respectable, it's nowhere near the numbers that Nissan will have to hit to reach the 50,000 annual sales that CEO Carlos Ghosn says is possible in the US. Still, the Leaf had its best sales month since December 2014 (when it sold 3,102 units) in May, but last month was still down 32.5 percent compared to May 2014. Despite the smaller overall number, May represents a big positive for Chevy, which has seen sluggish sales for the Volt for a long while now. The 1,618 Volts sold last month are only 3.9 percent lower than the 1,684 sold in May 2014 and May 2015 was the best month for Volt sales since August 2014. Perhaps salesmen are ready to make deals, what with thousands sitting around on dealer lots right now. The next-gen Volt is due this fall, and the order books (in California, at least) opened up this week. Like every month, our full wrap-up of green car sales in the US is coming soon (the VW e-Golf, for example, hit a best-ever high of 410 sales). Until then, feel free to discuss the Volt and Leaf sales figures in the Comments. Green Chevrolet Nissan Electric Hybrid ev sales hybrid sales

GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging