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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

2016 Hennessey CTS-V is properly ridiculous with 1,000 horsepower

We truly live in a halcyon era of automotive performance with models like the latest Shelby GT350 Mustang and 707-horsepower Challenger Hellcat. And now Hennessey Performance Engineering is bringing something with absolutely obscene power to the world with its tuned 2016 Cadillac CTS-V that packs a ludicrous 1,000 horsepower. The latest CTS-V isn't even on sale yet but should be a powerhouse straight from the factory. Under its carbon fiber hood is a 6.2-liter supercharged LT4 V8 with 640 horsepower and 630 pound-feet of torque that makes the sedan capable of a 200-mile-per-hour top speed. Hennessey's take ditches the blower in favor of two turbos to feed air to the engine. To cope with the extra power, the mill gets upgrades like forged aluminum pistons and forged steel parts for the rods and crankshaft, and transmission upgrades are also necessary to make it all work. Buyers can even spec things like carbon-ceramic brakes and a widebody kit to allow for bigger tires. The crazy numbers are leading to some big performance claims from company founder John Hennessey. "I believe that our 2016 Twin Turbo CTS-V will have a top speed approaching 240 mph," he said in the Caddy's announcement. Hennessey is building just 24 of these 1,000-horsepower sedans for the 2016 model year. However, for those that want to keep the supercharger under the hood, the company is also offering upgrades with 750 hp and 800 hp for the CTS-V too. All of them sound absolutely ridiculous in an utterly fantastic way. 2016 HPE1000 Twin Turbo Cadillac CTS-V Texas Tuner Plans to Build World's Fastest 4-Door Sedan Sealy, Texas-When the next generation Cadillac CTS-V hits the streets later this year, it will have 640+ hp and a top speed of nearly 200 mph. To the team at Hennessey Performance Engineering (HPE), this is a good starting point. The company plans to pick-up where they left off with the last gen CTS-V by producing the world's fastest 4-door sedan: The Hennessey HPE1000 Twin Turbo CTS-V. "A couple of years ago, the State of Texas gave us the opportunity to test one of our specially tuned CTS-Vs – our VR1200 Twin Turbo coupe. It ran 221 mph (356 km/h) on State Highway 130, near the Circuit of the Americas", said company founder, John Hennessey. "It was still pulling on when we ran out of road. I believe that our 2016 Twin Turbo CTS-V will have a top speed approaching 240 mph (386 km/h)". Hennessey plans to offer a limited run of only 24 units for the 2016 model year.

Five awesome Lego car creations

Lego cars are among our favorite toys. They're fun for play, and if built properly, great to display. With that in mind, we've crafted a list of some of the best creations we've seen. Some are on sale now, while others are merely the work of fanciful enthusiasts. There are even a couple that you definitely cannot buy (we'll explain).
Our choices are diverse, including everything from a diminutive 1969 Chevy Corvette to a fullsize Ferrari Formula One racecar. These are just five projects that caught our eye - there are many more out there - so if you don't see your favorite Lego car on the list (or if you have your own creation), please tell us about it, in Comments.