1997 Cadillac Deville Concours Sedan 4-door 4.6l on 2040-cars

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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

Off-road Cadillac Escalade adds some extra bush country capability

So, you're a dyed-in-the-wool General Motors fan, but like the notion of a machine like the Hennessey Velociraptor. We have good news for you. Behold the Aria Coachworks XPLORE Cadillac Escalade. For a modest fee, Aria will outfit your Escalade with a custom suspension, BF Goodrich all-terrain tires wrapped around aluminum wheels, a Warn winch and a special exhaust. There's even a snorkel option for those of you with aspirations toward deep water crossings. Consider yourself warned, however: unlike other GMT900 SUVs, the Cadillac only has an all-wheel drive system, not the more rugged four-wheel drive setup of the Chevy Tahoe and GMC Yukon). Outside, the luxury SUV gets matte paint, black chrome trim, XPLORE power running boards and a roof rack system.
The interior also receives a few fun changes as well, but we're more interested in the fact that buyers can snag a power roof top tent. You know, in case you need to camp out at Best Buy for the PS4. There's also a matching camp trailer and, our personal favorite, a matching BMW GS motorcycle. Bikes not your bag of tricks? That's fine. Aria will also sell you a matched Airstream trailer or Old Town wooden canoes. As much as we want to hate this, we love the notion of bashing through the woods in a $100,000 Cadillac battlewagon with our GS in tow. Check the press release below for more information.

Next-gen Cadillac Escalade debuting October 7 in NYC

Cadillac will unveil the next Escalade in October, at an event in New York City. It will be the sole member of GM's large SUV family to not get a debut at the Texas State Fair, which we don't think is all that surprising, considering the kind of clientele attracted by the big Caddy.
The new truck, from the few teaser images and spy shots we've seen, has evolved with the rest of the Cadillac range. We've got a glimpse of its tall, thin headlights, which look like an evolution of what's on the current truck. Expect some kind of egg-crate grille, reminiscent of the new CTS and ATS, while Cadillac's CUE system should feature heavily in what we hope is a thoroughly revised cabin.
The event takes place on October 7, so check back then for more info on the all-new Escalade.