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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

Burt Reynolds' movie re-creations fetch $379,500 in Vegas

The recent death of Hollywood legend and automotive enthusiast Burt Reynolds helped drive up the value of four of his former cars from the 1970s and '80s, which sold last weekend at Barrett-Jackson's Las Vegas auction for a combined $379,500. Reynolds, who died Sept. 6 at age 82, had offered three Pontiac Trans Ams — two of them re-creations of the cars he drove in "Smokey and the Bandit" and "Hooper" and the third from 1984 used to promote his United States Football League team, the Tampa Bay Bandits. The fourth was a 1978 Chevrolet R30 pickup truck, styled like the one featured in "Cannonball Run." The "Bandit" re-creation, a 1978 Pontiac Firebird Trans Am that Reynolds ordered to be as "movie-correct" as possible but featuring a custom-built 200-4R automatic transmission, sold for $192,500. The car features a freshly built Pontiac 400 cubic-inch V8 mated to a four-speed automatic and featuring all-new Butler Performance parts and air-conditioning components. Reynolds reportedly said this was his favorite car from his films, and it even came with an authentic movie-correct CB radio and CB antenna. The red retro-rocket "Hooper" '78 Firebird, with a 403 cubic-inch V8 and a three-speed automatic, hammered for $88,000. By comparison, a gold 1978 Trans Am also offered at the Las Vegas auction but not connected to Reynolds fetched $27,500. The 1987 Chevy R30 pickup was a re-creation of the Indy Hauler pace truck seen jumping over a moving freight train in "Cannonball Run." It hammered for $49,500. The fourth car never appeared in any of Reynolds' films but is instead the only surviving example of two Trans Ams used to promote the Tampa Bay Bandits of the now-defunct USFL, having been driven out onto the field by Reynolds and his late friend and co-star, Jerry Reed, during opening day one season. It also sold for $49,500. At the Barrett-Jackson Scottsdale Auction in 2016, Reynolds accompanied a 1977 Trans Am used to promote "Bandit" onto the auction block. That car sold for $550,000. Related Video: Featured Gallery Burt Reynolds 2018 Barrett-Jackson Las Vegas Auction Image Credit: Barrett-Jackson Celebrities Chevrolet Pontiac Truck Coupe Performance celebrity pontiac trans am pontiac firebird burt reynolds

GM to idle car production at five factories as Americans continue CUV love affair

In case you needed another reminder that Americans have fallen out of love with sedans, General Motors today announced plans to idle five factories in January in a bid to cut its inventory to 70 days. Detroit-Hamtramck Assembly ( Buick LaCrosse, Cadillac CT6, Chevrolet Volt and Impala) and Fairfax Assembly in Kansas ( Chevy Malibu) will stop production for three weeks. Lansing Grand River ( Cadillac ATS and CTS, and Chevy Camaro) is going down for two weeks, while Lordstown, OH ( Chevy Cruze) and Bowling Green, KY ( Chevy Corvette) will go idle for a week each, Automotive News reports. GM's shutdown reflects a broader problem with the company's supply – at 847,000 vehicles, the company's supply increased unsteadily from a low of 629,000 units in January of 2016. That's more than a 25 percent increase in the past year. Citing information from Autodata, The Detroit News reports that at the end of November, GM had a 168-day supply of LaCrosses, 177 days' worth of Camaro, 170 days of Corvette, 121 days for Cruze, 119 days for ATS, 132 days for CTS, and 110 days of CT6. Meanwhile, inventory of the company's more popular vehicles is actually below the professionally accepted 60- to 70-day supply, The News reports. The Trax, Colorado pickup, and GM's full-size SUVs are sitting below 50 days and experiencing year-over-year sales increases. GM needs a rethink of its inventory levels, which is something that's apparently coming. "We're going to be responsible in managing our inventory levels," GM spokesman Jim Cain told The News. Another unnamed spokesman told Automotive News the company's day-to-day supplies would "fluctuate before moderating at year-end." But at least one analyst thinks this won't be the last time Detroit needs to stop production to level things out. "Incentives are elevated, residuals are declining, and rates are rising," Brian Johnson, an analyst with Barclays, told The News. "And while GM in particular may benefit in the months ahead from new product launches, it's important to recognize that GM's inventory is elevated at the moment, and it wouldn't surprise us if they need to announce another production cut – which could pressure the stock." Related Video: News Source: The Detroit News, Automotive News - sub. req.Image Credit: Paul Sancya / AP Plants/Manufacturing Buick Cadillac Chevrolet GM GMC Crossover SUV Sedan bowling green cadillac xt6 fairfax