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Cadillac ATS coupe and sedan get Midnight Editions

Horror stories and fairy tales make a mint by having the scariest things happen at midnight, but automakers make a mint by marketing midnight. Chevrolet busted out a Silverado Midnight Edition early this year, followed shortly thereafter by an Impala Midnight Edition. In between those two we got the Cadillac CTS Midnight Edition, and now comes an ATS following in the zero-dark-thirty tradition, according to GM Inside News. The ATS Midnight Edition will add $1,695 to the sedan price and $600 to the coupe. For that cash outlay you get black chrome on the grille, around the windows, and on the rear fascia, 18-inch "After Midnight" wheels, "sueded microfiber" trim on the steering wheel and shifter, plus the Cold Weather Package with a heated steering wheel and heated front seats. Just those few exterior changes make a big difference up front, increasing the appeal and aggression of the sports sedan without being ostentatious. You can't go dark with just any old ATS, though. The package is limited to rear- and all-wheel-drive versions of the Performance trim. And the color palette is reduced to four hues: Crystal White Tricoat, Red Obsession Tintcoat, Phantom Gray Metallic, and Black Raven. The three possible interior combos are Light Platinum with Jet Black accents, Morello Red with Jet Black accents, and Jet Black with Jet Black accents. Related Video: Featured Gallery 2015 Cadillac ATS Midnight Edition News Source: GM Inside News Design/Style Cadillac Coupe Luxury Special and Limited Editions Performance Sedan

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

Submit your questions for Autoblog Podcast #325 LIVE!

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Discussion Topics for Autoblog Podcast Episode #325
Twin-turbo Cadillac CTS coming