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Callaway debuts its new C7 Stingray at National Corvette Museum

Callaway showed off its first tuned version of the 2014 Corvette Stingray at the National Corvette Museum last week, giving the rampant enthusiasts of America's sports car a look at the roughly 620-horsepower, supercharged rocket.
Unlike the Corvette SC610 we showed you back in January, this Stingray packs a fair bit more oomph. Horsepower is only up ten ponies, but torque has jumped from 556 pound-feet to "at least" 600 pound-feet. Neither horsepower nor torque is official quite yet, although Callaway is expecting to know just what its creation can do once testing and validation is completed later this month.
The 6.2-liter, supercharged V8 now boasts a new, three-element intercooler, which Callaway claims only allowed the inlet air temperature to increase by ten degrees Fahrenheit during dyno runs. Previous designs saw a 35-degree-Fahrenheit jump. The exhaust system has also been fettled with, and now is even less restrictive.

GM reportedly developing 2.5-liter turbo four-cylinder

General Motors is allocating a massive amount of resources to developing electric technology, but it's not forgetting about the gasoline-powered cars that make up the bulk of its sales. It's reportedly designing a new 2.5-liter turbocharged four-cylinder engine based on its 2.7. Citing "sources familiar with the matter," enthusiast website GM Authority wrote that the 2.5-liter four is "in [the] final stages of development," meaning it should be announced sooner rather than later (assuming the report is accurate). Technical details are few and far between as of writing. The publication learned that the 2.5 will be part of the Cylinder Set Strategy (CSS) family of engines and that it will be mechanically related to the 2.7-liter currently found in the Chevrolet Silverado 1500, among several other models. It will feature dual overhead camshafts. It's too early to tell which models the 2.5-liter four-cylinder will end up in, or how much power it will generate. The output will likely depend on the application. For context, the 2.7 delivers 310 horsepower at 5,600 rpm and 348 pound-feet of torque between 1,500 and 4,000 rpm in the Silverado. In the smaller Colorado, it provides anywhere between 237 and 310 horsepower depending on the trim level selected. While this is pure speculation, our crystal ball tells us the engine will end up powering crossovers. It's an easy deduction to make. We can't imagine it will be offered in the Silverado, and seeing it in the Colorado is unlikely because its entry-level engine develops 237 horsepower; there's likely not much of a market for a midsize truck with 200 or so horsepower. Putting it in the Corvette wouldn't make sense and the Camaro has nearly reached the end of its life cycle without a successor planned. This leaves us with Chevrolet's range of crossovers, like the Equinox, as well as their GMC-, Buick-, and Cadillac-branded counterparts. We're not discounting the possibility that the cars set to receive the 2.5 haven't been unveiled, but those are likely crossovers, too; the odds of seeing another big Chevy sedan are very, very low. General Motors hasn't commented on the report, and it hasn't publicly announced plans to expand its CSS family of engines. If the report is accurate, we should learn more about the new turbocharged, 2.5-liter four-cylinder engine in the not-too-distant future. Featured Gallery 2022 Chevrolet Equinox RS View 56 Photos Buick Chevrolet GM GMC

Recharge Wrap-up: Chevy bi-fuel Silverado 3500HD Chassis Cab, VW Car-Net works with Apple Watch

Volkswagen's Car-Net app will be compatible with the Apple Watch. Using the app, owners will be able to lock and unlock their car, check charging status or fuel level, locate their car, flash the lights, and honk the horn of their vehicle remotely from their wrist. E-Golf owners can begin or end charging or operate climate control through their Apple Watch. The app can also monitor other household drivers with speed and boundary alerts - perfect for the parent who lends their car to a teenager. Read more in the press release from Volkswagen. Chevrolet is launching the bi-fuel 2016 Silverado 3500HD Chassis Cab. The work truck will now offer a version that will run on both gasoline and compressed natural gas (CNG). "CNG burns cleaner and costs less at the pump than gasoline, making it an appealing option for fleets," says GM's Ed Peper. Companies like Southern California Gas Co. find that trucks like this meet their work needs and help them achieve their goals of greening up their fleets, GM says. Read more in the press release from GM. UPS has made a deal to buy renewable natural gas from Clean Energy Fuels. This make UPS the biggest user of natural gas in the shipping industry. Clean Energy Fuels, co-founded by T. Boone Pickens, will provide UPS with its Redeem brand natural gas, which uses methane captured from landfills. UPS hopes to log 1 billion miles with its alternative fuel and advanced technology fleet by 2020. "Our rolling laboratory approach provides a unique opportunity for UPS to test different fuels and technologies," says Mitch Nichols of UPS. "Today's RNG agreement will help mature the market for this promising alternative fuel." Read more in the press release below. UPS BECOMES NATION'S LARGEST USER OF RENEWABLE NATURAL GAS IN SHIPPING INDUSTRY New Agreement with Clean Energy Will Help Grow Market for Use of Methane Gas from Landfills as Fuel Atlanta, May 5, 2015 – UPS® (NYSE:UPS) today announced it has entered into an agreement to purchase renewable natural gas (RNG) for its delivery vehicle fleet from Clean Energy Fuels Corp. (NASDAQ: CLNE). The deal signifies UPS's plan to significantly expand its use of renewable natural gas for its alternative fuel and advanced technology fleet. The company has a goal of driving one billion miles using its alternative fuel and advanced technology fleet by the end of 2017. Clean Energy Fuels, co-founded by T.