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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

Infiniti Q50 Red Sport 400 priced at $48,855, AWD at $50,855

Infiniti's most powerful production model, the new Q50 Red Sport 400, now has a starting price. You'll need at least $48,855 for the rear-drive model or $50,855 for all-wheel drive. (Both figures include the $905 destination charge.) A fully loaded, rear-drive Q50 RS400 with Direct Adaptive Steering, navigation, adaptive cruise control, a heated steering wheel, and Infiniti's entire alphabet soup of safety equipment, tops out at $57,045. (Again, add $2,000 for AWD). When it comes to rear-drive competition, the closest base price to the Q50 is the 320-hp BMW 340i. This German undercuts the Infiniti by two grand, $46,795 to $48,855. But the BMW outprices the Q50 as soon as you start selecting options. A 340i with similar equipment to a loaded Q50 Red Sport 400 costs just under $60,000. All-wheel-drive German competitors also lose out in the price war. Like with the rear-drive models, the BMW 340i xDrive undercuts the Q50 RS400 by around $2,000. Add the options, and the Infiniti becomes a better value. The other two big German rivals, the Audi S4 and Mercedes-Benz C450 AMG start at a higher price and only get more expensive. Technically the S4 starts cheaper than the Q50, but only with the standard manual transmission. Selecting the S-Tronic dual-clutch model kicks the price from $50,125 to $51,125, and going for the top-end Prestige trim will bump potential Audi owners up to $57,025. Throw on must-have S4 options, including adaptive cruise control, adaptive dampers, and a sport differential and you'll be shell out $64,425 for the Audi. The Mercedes-Benz C450 AMG is the priciest choice in this group, starting at $51,725, or roughly $900 more than a base Q50 RS400 with AWD. Options, again, are the downfall here. Building a C450 to match a loaded Infiniti will drive the Mercedes' price up to $64,315. While it occupies something of a weird space relative to these vehicles, it's also worth mentioning the Cadillac CTS VSport. It's the only car in this impromptu pricing comparo that can outgun the Q50, with its 3.6-liter, twin-turbo V6 good for 420 hp and 430 lb-ft of torque. It also starts at $60,950, although that includes plenty of standard equipment. All this means that the Q50 Red Sport 400 represents a relative value. It packs more power than the Germans – 80 more than the 340i, 67 more than the S4, and 38 more than the C450 – and a more comprehensive list of options, too.

Ghostbusters' new Ecto-1 is an oddly uninspiring '82 Caddy

The Ghostbusters, or at least the movie franchise, will emerge from Hollywood's cobwebs this summer, but instead of the iconic 1959 Cadillac known as Ecto-1 that delighted big screen audiences in 1984, the new model may leave some scratching their heads. That's because this latest Ghostbusters draws its vehicular inspiration from a decidedly less interesting period in American automobile production: the 1980s. Starring alongside Kristen Wiig, Melissa McCarthy, Kate McKinnon, and Leslie Jones is a 1982 Cadillac DeVille hearse. The studio dressed up this tired Caddy to look the part, but something's amiss. Instead of the flamboyant fins and shiny chrome, the '82 is decidedly pedestrian and uninteresting. Even in 1982, it was kind of a dull choice for luxury car buyers. There's a reason Murilee Martin deemed the '70s and '80s the "malaise era." Built a couple of years before the original, Academy Award-winning Ghostbusters hit cinemas, the '82 DeVille represents one of Cadillac's lowest points bar the Cimarron. Under its hood might be Cadilac's new-for-1982 HT 4100 V8 engine, which featured what the brand referred to as "digital" fuel injection. With 135 horsepower and 190 pound-feet of torque, the DeVille didn't win stoplight races back then. Oddly, the V6 engine that came standard in the '82 Sedan DeVille produced the same horsepower but delivered an extra 15 torques, which made it both faster and more fuel efficient than the V8. These were bad times for General Motors, clearly, but the gas engines paled in comparison to Cadillac's first diesel. The company's LF9 5.7-liter diesel V8 was optional on the DeVille and we pity the unlucky buyers who checked that box. Generally credited as the engine that made "diesel" a haunted word in Detroit for 30 years, the 350-cubic-inch unit might actually be fitting for the Ghostbusters. On the bright side, the '82 is new enough that it may have carried a box or two of Hi-C's stellar, Ghostbusters-inspired Ecto Cooler. Maybe the mortician took his kid to Kroger one time, you never know. Fitting in In the original 1984 Ghostbusters, the '59 Caddy was a forlorn and forgotten piece of machinery waiting for a new lease on life. Character Dr. Ray Stantz picks it up and admits in the film that it needs "some suspension work and shocks ...