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Next-gen Cadillac CTS-Vs caught in parking lot

A pair of camouflaged Cadillac CTS prototypes were spotted, and thankfully photographed, outside a grocery store in Southern California. From the image above - there are plenty more if you click over to TotalCarScore.com - it appears these could be testers for the 2014 CTS-V, but that is just speculation. We've seen the obvious "V" motif in the grille before, and there's what could be another "V" in the design of the side mirrors.
The hood on the car in the background appears to include two bulges, but the single shot that affords a tiny peek under the hood shows reveals only the airbox. Plenty of rumors, and the sight of an engine cover inscribed with the words "Twin Turbo," have caused people to wonder if a twin-turbo V6 will live under the production car's hood instead of the V8 currently there. In back, instead of the round tailpipes found outboard on all the CTS sedans, there's a pair of integrated tips in a parallelogram shape. A new shifter with contrasting stitching was spied in the cabin.
If predictions hold up it will arrive later this year. When it does, expect the body underneath all that camo to be softer on the eye compared to the current car - less science and more art. For now, hit the link to see more spy shots of what's coming.

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

Autoblog Podcast #408

Episode #408 of the Autoblog Podcast is here, and this week, Dan Roth, Steven Ewing, and Brandon Turkus talk about the possibility of France banning diesel, Cadillac putting Porsche in its sights, and the lineup of high-performance Fords potentially coming to the Detroit Auto Show. We start with what's in the garage and finish up with some of your questions, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Check out the rundown below with times for topics, and you can follow along down below with our Q&A. Thanks for listening! Autoblog Podcast #408: The video meant to be presented here is no longer available. Sorry for the inconvenience. Topics: France to ban diesel? Cadillac to go Porsche hunting Ford NAIAS lineup In The Autoblog Garage: 2015 Cadillac ATS Coupe 2015 Audi S3 Long-Term 2014 Jeep Cherokee Hosts: Dan Roth, Steven Ewing, Brandon Turkus Runtime: 01:04:56 Rundown: Intro and Garage - 00:00 France Diesel Ban - 27:13 Cadillac vs. Porsche - 34:32 Ford Performance at NAIAS - 42:23 Q&A - 49:46 Get the podcast: [UStream] Listen live on Mondays at 10 PM Eastern at UStream [iTunes] Subscribe to the Autoblog Podcast in iTunes [RSS] Add the Autoblog Podcast feed to your RSS aggregator [MP3] Download the MP3 directly Feedback: Email: Podcast at Autoblog dot com Review the show in iTunes Podcasts Detroit Auto Show Audi Cadillac Ford Jeep