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Cadillac developing stretched ATS-L just for China

To luxury automakers, long-wheelbase sedans are to China that crossovers and SUVs are to the US, so it isn't all that surprising any more when the latest sedan gets an extra couple of inches between the wheels to improve rear-seat comfort. According to Car News China, the next sedan to get the stretch will be the Cadillac ATS, which will increase the wheelbase by 10 centimeters (about four inches) to become the ATS-L.
Designed to go up against rivals like the BMW 335Li and the added-length Mercedes C-Class, the ATS-L will reportedly be built locally in China with an engine list that will grow as well. Currently, only the 2.0-liter turbo engine is offered in the ATS in China, but the ATS-L will get the full spectrum of ATS engines including the base 2.5-liter and the peppier 3.6-liter V6. This isn't the first time Cadillac has offered a China-specific stretched sedan either as the SLS dates back to 2006.

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

Driving the 2016 Cadillac CTS-V at the old Elkhart Lake road course

The placid community around Elkart Lake, WI, looks about as far removed from a glorious motorsport venue as you can imagine. A turn of the century downtown gives way to old-school resorts, beaches, and boat launches around the picturesque lake, with farms framing the rolling hills all around. But it was those very same meandering country lanes that gave birth to one of America's greatest racing circuits, some 65 years ago. Between the first race in 1950 and the opening of the dedicated Road America track in 1956, the roads around Elkhart Lake provided the setting for some great post-war racing. Competing on public streets was ultimately outlawed across the country, but not before drivers risked life and limb in the name of glory in the Wisconsin summer. Cadillac asked us out to the area recently, not to talk racing history, but to look forward at one of the most track capable cars the company has ever offered: the 2016 CTS-V. We got to drive the 640-horsepower beastie for an entire morning of hot laps at Road America, but unfortunately, we're not allowed to tell you about all of that right now. You'll have to wait until the embargo lifts on August 3, at which point we promise a full recounting of our adventure. Having the CTS-V for a full two days though, and in the spirit of the motorsport that imbues the air in Elkhart Lake, we took the Cadillac on a drive around the old 6.5-mile road course. Come for the new Caddy, but stick around to find out what the hell Wacker's Wend is. Cadillac Luxury Performance Videos