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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

GM adds 1,200 jobs at Detroit-Hamtramck plant

General Motors is making a big move at its Hamtramck, MI, factory, announcing it will add a second shift and hire over 1,200 workers within the next several months. It's expected that by early 2016, the factory will employ over 2,800 workers to build the Chevrolet Volt, Impala, Malibu, Cadillac ELR, and by early next year, the new CT6. According to GM Hamtramck spokesperson Courtney Zemke, 40 of the 1,200 positions are for salaried employees, while the remainder will be hourly positions. As for where these employees will go, positions are being made available across the factory, so GM isn't focusing on any particular area for its new hires. It's a similar story behind the hiring surge itself. GM said in its press release that the "second shift is necessary to meet forecasted market demand," a position Zemke reiterated. It's a matter of demand across the plant's portfolio, rather than any one particular product seriously outstripping supply. Naturally, the United Auto Workers is happy with the move. "The workforce at Detroit-Hamtramck is second to none," UAW Local 22 Shop Chairman Don LaForest said in the attached release. "We appreciate the opportunity to expand our UAW-GM family." Hiring is going on now, with the second shift slated to get underway in early 2016. GM's Detroit-Hamtramck Assembly to Add Second Shift and More Than 1,200 Jobs Plant will nearly double its workforce by early 2016 2015-10-22 DETROIT – General Motors is nearly doubling its workforce at Detroit-Hamtramck Assembly by adding a second shift and more than 1,200 hourly and salaried jobs. The addition of a second shift will increase the plant's workforce to approximately 2,800 people when hiring is completed. The second shift is necessary to meet forecasted market demand for the five cars produced at Detroit-Hamtramck. "This is the result of the award-winning vehicles Detroit-Hamtramck produces and the confidence GM has in our team to build world-class quality for our customers," said Plant Manager Gary West. Second shift hiring is underway, and the shift is scheduled to begin operations in early 2016. "The workforce at Detroit-Hamtramck is second to none," said UAW Local 22 Shop Chairman Don LaForest. "We appreciate the opportunity to expand our UAW-GM family." The 4.1 million-square-foot Detroit-Hamtramck Assembly opened in 1985. GM has invested $1 billion in the plant over the last six years, making it one of the company's most-agile manufacturing facilities in North America.

Dale Earnhardt, Jr. puts his Callaway Corvette and '55 Chevy on eBay

Dale Earnhardt, Jr. has put a couple of his personal cars up for sale on eBay. The first is a 1955 Chevy Bel Air that Junior had reworked by Funkmaster Flex, a bit of a diversion from Flex's more common Ford efforts. Junior's ride has a replacement chassis from Jim Meyer Racing, a 434 small-block tuned by Sharioff Racing to 500 horsepower, and truly thin rubber on what appear to be aluminum billet rims with Junior's former number 8 on the center caps. The interior is all custom and painted to match the outside, and those seats have been completely reupholstered. The second car is a 1999 Callaway C12, the 18th of 19 C12s built that year and featured in a 2002 issue of AutoWeek. It joined Earnhardt's private collection in 2004. Built on the base of a C5 Chevrolet Corvette and using a lot of technical know-how from Callaway's European racing program, the BMW #287 Blue Pearl C12 had its V8 bored out to 6.2 liters and graced with Callaway's Supernatural upgrade; it also has a Callaway coil-over suspension with adjustable dampers. There's new bodywork all around, and when new it cost about $200,000. At the time of writing bidding on the Bel Air was up to $80,100, the C12 was at $63,100. The auction ends Monday morning, and the winning bidders have the option of having their prizes autographed and retrieving the keys from Dale Jr himself if they're willing to go to Moorseville, NC. Featured Gallery Dale Earnhardt Jr. '55 Chevy Bel-Air View 28 Photos Related Gallery Dale Earnhardt Jr. Callaway C12 View 24 Photos News Source: Dale Earnhardt Jr via eBay [1], [2] Aftermarket Celebrities Chevrolet Auctions Coupe Luxury Special and Limited Editions Performance Classics eBay callaway callaway corvette Chevy Bel Air