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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

Cadillac back on track with 600-hp ATS-V.R racer in FIA GT3 spec [w/video]

There was already a rumor brewing that Cadillac might eschew the CTS as its racecar next season in favor of the ATS Coupe. It turns out that is absolutely the case, and now we know just what this 600-horsepower, future racer looks like. The coupe might not be limited to competing in just the US, though, because it's built to FIA GT3-specifications, meaning that this Caddy is also eligible to race in over 30 series worldwide against the likes of Bentley, McLaren, Audi and other premium brands.
The heart of this massively winged Cadillac is an engine dubbed the LF4.R. It's based around the unit in the production ATS-V and CTS Vsport but with larger turbos, bigger intercoolers, side exhausts and other tricks. Cadillac claims it makes a monstrous 600 hp and 520 pound-feet of torque in unrestricted form.
As the photo above shows, the ATS-V.R also wears an aggressive aero kit with a carbon fiber front splitter, and a wing at the back that could probably double as a picnic table in a pinch. The dry weight of the whole package is quoted at about 2,900 pounds, which is around 700 pounds less than the street version.

Shatner's Rivet motorcycle to enter limited production with CTS-V engine [w/video]

William Shatner has entertained the world for decades, from playing Captain Kirk on Star Trek to covering songs like Rocket Man and Common People. Now in his 80s, Billy Shatz has embarked on one of his weirdest projects yet: helping to design the wild Rivet One trike with motorcycle fabrication company American Wrench. Now, you can order one too with power as crazy as the three-wheeler's design. We last saw the Rivet One's aluminum body with the styling like a menacing, art-deco easy chair a few months ago, but now Shatner has started talking about the trike's powerplant, which is based around the heart of a Cadillac CTS-V. "It's a beast with advanced guts. It's powered by an all-aluminum, computer-controlled, supercharged and intercooled V8 engine – producing over 500 HP," Shatner said to Gizmag. Keep an eye out because Shatner intends to captain the Rivet One from Chicago to Los Angeles later this year. Also, if you want a ride like Captain James T. Kirk, the company is taking requests for the trike, made on a build-to-order basis after completing Shatner's job, according to Gizmag. Prices aren't announced yet but expect the number to be as out of this world as a voyage of the Enterprise. The video below provides a further look at the Rivet One's unconventional design. Superheroes Wanted - A Look At The Machine from Rivet on Vimeo. News Source: Gizmag, Rivet via VimeoImage Credit: Rivet Motors Celebrities Design/Style Cadillac Motorcycle Performance trike William Shatner american wrench