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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

2018 Mazda6, Porsche Panamera and Nissan Titan | Autoblog Podcast #541

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Green Editor John Beltz Snyder and Associate Editor Reese Counts. We talk about driving the updated, turbocharged 2018 Mazda6, 2018 Porsche Panamera Sport Turismo 4S Sport Turismo and the 2018 Nissan Titan S 4x4 King Cab. We also discuss aftermarket parts for the Chevy Colorado, pick our favorite 50th Anniversary Hot Wheels and, as always, help a listener buy a new car in our "Spend My Money" segment. Autoblog Podcast #541 Your browser does not support the audio element. Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we've been driving: Mazda6, Porsche Panamera, Nissan Titan The aftermarket takes on the Chevy Colorado 50th Anniversary Hot Wheels Spend my money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Aftermarket Podcasts Chevrolet Mazda Nissan Porsche Car Buying Truck Wagon Sedan Hot Wheels porsche panamera sport turismo

2016 Chevy Camaro performance figures released

If you want to make a car faster, there are two sure-fire ways to get the job done – add power and/or reduce weight. Chevy has done both for the 2016 Camaro, putting as much as 455 horsepower into its muscle coupe and shaving a few hundred pounds from every trim. That range-topping power comes courtesy of a 6.2-liter V8 engine, and it's enough grunt to push an automatic-equipped Camaro SS to 60 miles per hour in just 4.0 seconds flat (4.3 seconds with a manual) and down the quarter mile in 12.3 seconds at 116 mph (12.5 at 115 for the stick). Not coincidentally, those acceleration specs, at least on paper, put the V8-powered Camaro SS just above the Mustang GT on the muscle-car pecking order. When the road gets twisty, Chevy claims the Camaro SS can generate as much as .97 g on the skidpad. And, thanks in part to its Goodyear Eagle F1 summer tires, the SS can stop from 60 in as little as 117 feet. We look forward to finding out how nimble the new Camaro feels when compared to its primary competitors. <p>Your browser does not support iframes.</p> Moving down one notch to the 335-hp 3.6-liter V6, properly equipped 2016 Camaro coupes can hit 60 in as few as 5.1 seconds and cover the quarter in 13.5 at 103. Perhaps even more intriguingly, the 2.0-liter turbocharged four-cylinder and its 275 horsepower (the only configuration quicker with a manual transmission, incidentally) can propel the Camaro to 60 in 5.4 seconds and through the 'ol 1320 in 14 seconds flat. That's seriously quick, but buyers comparing the Camaro to the Mustang will find that the EcoBoost 2.3-liter is a bit more powerful (310 hp and 320 lb-ft) and quicker (5.1 seconds to 60). Chevy is making lots of noise about the efforts its engineers went through to shed weight from the 2016 Camaro, going so far as to shave down suspension bolts so that no thread went unthreaded. The weight-saving obsession pays off – base Camaro models are down 390 pounds while the SS model drops 223 pounds over the 2015. The 2016 Camaro SS boasts a power-to-weight ratio of 8.1 lbs per pony, a 14-percent improvement over the last-gen. Even though weight is down, chassis stiffness is said to be up by 28 percent over the fifth-gen Camaro coupe. Also of note: The Camaro is now lighter than the Mustang across the board when comparing like-to-like configuration levels. The 2016 Chevy Camaro starts at $26,695 (including $995 for destination).