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2014 Cadillac CTS Vsport [w/video]

Bridging The Gap With Power And Poise
As you read these words, West Coast Editor Michael Harley is preparing to drive the brand-new 2014 Cadillac CTS along the gorgeous, sun-drenched roads of Southern California. And while I'll wait for Harley's full report before I put words in his mouth, I'm willing to bet he enjoys the hell out of Cadillac's new CTS. In fact, I'm sure of it.
I say this with confidence because, about a month ago, I spent the better part of a day flogging the new CTS Vsport around the 2.9-mile Milford Road Course - a challenging circuit laid out in the infield of an oval test track at GM's proving grounds in southeast Michigan. The MRC was built about a decade ago after Bob Lutz was lured out of retirement to work closely with GM's product development team, and thus, this circuit is known informally as the "Lutz Ring." The main objective of the MRC was to have an in-house facility for engineers to fine-tune vehicle dynamics, without having to constantly schlep cars over to Germany's infamous Nürburgring. (Of course, they still do.)

Cadillac shows dealers convertible rendering

Cadillac is getting serious about revitalizing and expanding its lineup, and to that end, a new report claims that brand boss Johan de Nysschen has been showing plans for several new models to the marque's dealer body - among them, a new convertible.
The droptop which Cadillac reportedly showed its dealers in sketch form, would be based on the same platform as the ATS and CTS, those it's unclear to which (if either) of those model lines the new convertible would be added, or whether the design features a canvas or folding hardtop roof. One way or another, it would be the first time Cadillac would offer a convertible since the Corvette-based XLR roadster was discontinued more than five years ago.
Quoting an unnamed brand spokesperson, Cadillac would "like to introduce an open car to the portfolio at some point," however, "it's not likely to be one of the near-term portfolio additions."

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