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If Cadillac’s smart, the CT5 will be a CTS without baggage

Cadillac is, mercifully, about to rationalize its lineup, something that's been a long time coming. The CTS is one of those cars that gets admiration from reviewers, like us, for a concerted effort from GM to engineer an underlying platform that matches the Germans in terms of raw dynamics. From buyers, it gets not even a shrug as they, oblivious to its existence, walk right into BMW and Mercedes dealerships. The reasons for this have a lot to do with the sheer brand recognition, and the image, of the German competitors. You can't really lay that all at GM's feet, but what you can do is critique the uninspired drivetrain selection. The 3.6-liter V6 is a crude implement, making its 335 horsepower roughly. The BMW's equivalent inline six makes its power smoothly, with modern forced induction. There's no directly comparable E-Class sedan until you get into the V-Sport versus E43 situation, but the turbo four is smooth. And the interior? No question. The Mercedes is jaw-slacking. The story for the CTS's turbo four is largely the same. Some blame also has to be leveled at the first- and second-generation CTS sedans, which adopted an odd strategy: sell a slightly larger sedan to folks looking at 3-Series, A4, and C-Class, but at about the same price. Folks weren't interested in a larger car for the same money. Despite the third-gen CTS's growth into the 5-Series size class, the CTS still seems like an odd in-betweener in the sport luxury segment – psychologically, if not physically. CTS sales are in the toilet in 2017, and GM is smart to shake things up. So with the announcement that Cadillac head honcho Johan de Nysschen has finally been allowed to kill off underperforming models, the CTS is toast. (As is the ATS, and much more importantly, the XTS – a shambling dinosaur of a sedan.) What's next is the CT5, and that's what we're interested in now. Cadillac has until 2019 to figure out what the CT5 actually is. That isn't a lot of time, so our money is on it being a repositioned, rationalized CTS. The platform's not bad; it's heavier than the larger CT6, but it's fairly modern. Sadly, it's unlikely that any of the standard powertrain options will get a revamp, but maybe some additional sound deadening or an active engine mount system to reduce NVH will quell the V6's bad habits. View 32 Photos More importantly, Cadillac will get a chance to work on the interior look, almost certainly aligning it more closely with the much improved CT6. That'll help a lot.

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

Cadillac previews upcoming new XT5 crossover [UPDATE]

UPDATE: Cadillac has released another three images, which we've added to the gallery above. Cadillac is gearing up to unveil its new XT5 crossover at the Dubai Motor Show in November. We've already seen what it'll look like - from a couple of angles, anyway - but the all-American luxury automaker has given us another taste of what's to come with a quartet of images released on its official Facebook page. Set to replace the SRX that's now six years old, the all-new XT5 adopts the new design language we've seen on newer Cadillacs of late. That's most particularly emphasized with those vertically integrated LED headlights. The sharply creased styling is also signature Cadillac, as is the egg-crate grille capped by the brand's wreath-less new emblem. The dark brown paint job also looks like it has a deep metallic flake to it, offset by satin brightwork where you might have once expected to see glinting chrome. (Then again, it could just be reflecting a uniform backdrop.) The XT5 is expected to be the first of several new Caddy crossovers to wear the letters XT. A smaller model (likely to be dubbed XT3) is tipped to slot in below, with a larger XT7 to slot in above – but still below the defiantly truck-based Escalade that's not about to go anywhere anytime soon. Sedans will continue to start their nameplates with the letters CT. But after a dozen years, the letters SRX will be retired from the Cadillac lexicon. Related Video: