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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

Danica Patrick hands over keys to first 2016 Chevy Camaro

Alican "Turk" Boyacioglu got more than he expected this weekend when he picked up his new 2016 Chevy Camaro, the very first sixth-gen Camaro to be delivered to a private customer. That's because racer Danica Patrick was on hand for the delivery. The handing over of the keys took place at Texas Motor Speedway – a stop along the brand's Find New Roads trip. The journey is being conducted to introduce America to five new Chevy models: the Camaro and also the new Malibu, Cruze, Volt, and Spark. The road trip kicked off on October 19 and will conclude next week on November 14. Boyacioglu ordered up a red Camaro SS from Huffines Chevrolet in Lewisville, TX, north of Dallas. When he headed from Kansas to northern Texas to take delivery, he was pleasantly surprised to see Danica climb out of the car to hand him the keys. Though she may have raced under Honda power during her IndyCar days, Danica's NASCAR stock cars have always been powered by Chevrolet. She even drove a Camaro in the Nationwide Series. The smile on Turk's face ought to last him the nearly five-hour drive home to Wichita. For everyone else, deliveries are set to commence in earnest in the middle of this month. The first models to be delivered will be V6 coupes. Convertibles and turbo-four models will start shipping early in the new year. Customers will be able to choose between six powertrain combinations, made up of the 2.0-liter turbo four, the 3.6-liter V6, and the 6.2-liter V8, each available with a six-speed manual or eight-speed automatic. Pricing starts at $26,695 for the base 1LT trim and extends up to $37,295 for the 1SS. DANICA PATRICK SURPRISES CUSTOMER WITH 2016 CAMARO Huffines Chevrolet delivers first 2016 Camaro to Alican 'Turk' Boyacioglu DALLAS – Racecar driver Danica Patrick helped the team at Huffines Chevrolet deliver the first sixth-generation Camaro to a customer from Wichita, Kan., at the Texas Motor Speedway stop of Chevrolet's Find New Roads Trip today. Alican "Turk" Boyacioglu had been eagerly tracking the build of his 2016 Camaro SS and could not contain his excitement when Patrick emerged from the car and handed him the keys. "This whole experience was surreal," Boyacioglu said.

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"