2006 Chevrolet Silverado 1500 C1500 on 2040-cars

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Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

General Motors CEO Provides Few Details In Appearance Before Congress

It was only two months ago that Mary Barra, freshly crowned as the new General Motors chief executive officer, visited Washington DC as an esteemed guest of First Lady Michelle Obama for the State of the Union address. On Tuesday, Barra returned to the Capitol under more strained circumstances. For more than two contentious hours, she took questions from members of a House of Representatives subcommittee investigating General Motors years-long delay in initiating a recall of millions of vehicles that contained a defect that has killed at least 13 people. Why did GM accept faulty ignition switches that were below the company's set specfications? Why did GM learn about the problem in 2001 yet take no action until 2014? Will GM compensate victims' families even though the company's bankruptcy may limit its liability? Those were a few of the questions members of the House Oversight and Investigations Subcommittee asked. Few concrete answers were forthcoming. For her part, Barra sidestepped most of the questions, saying she wouldn't have information needed to answer them until an internal review is completed. David Friedman, the administrator of the National Highway Traffic Safety Administration, testified after Barra. The biggest news that emerged from the hearing was that General Motors has retained attorney Kenneth Feinberg to advise the company on its civil and legal responsibilities. He has made a career of resolving disputes and serving in a 'fixer' role, serving as the chief of the federal government's September 11th Victim Compensation Fund, as an administrator of compensation fund for victims of the BP Deepwater Horizon disaster and a similar fund for victims of the Boston Marathon bombing. Barra, who has been GM's CEO since January but been with the company since 1980, expects to meet with Feinberg on Friday, and have a concrete plan within the next 30-60 days. Yet Barra would not say for certain Tuesday that GM would compensate the victims at all. Despite repeated questions from Rep. Diana DeGette (D-Colo.), Barra did not outline the company's intentions. "I assume GM is hiring (Feinberg) to help identify the size of claims and then compensate the victims? Is that right," DeGette asked. "Is GM willing to put together some kind of a compensation fund for these victims that Mr. Feinberg will then administer?" "We've hired him to help assess the situation," Barra replied. "So really, there's no money involved at this point," DeGette asked.

EcoCar2 is on the hunt for a better, cleaner Chevy Malibu [w/video]

The students spent three years transforming an ordinary Chevy Malibu into a revolutionary vehicle. Not far from the building where General Motors once invented the Chevy Volt, a dozen or so college students are standing on the blacktop alongside a test track, watching a professional driver push the limits of a plug-in hybrid car they've built that's far more radical. These students, from Colorado State University, have spent the past three years transforming an ordinary Chevy Malibu into a revolutionary vehicle. At first glance, it still looks like a regular sedan. But under the hood, they've installed a hybrid powertrain that contains both hydrogen and electric power sources. Even by the standards of the Department of Energy competition they're participating in, it's an outlier. That's exactly what they had in mind. "We didn't want to come here and tell them how to build a better Volt," said Tom Bradley, faculty adviser for the Colorado State team. "They already know how to do that. We can tell them how to think about these possibilities in a whole new way." After three years of work, it all comes down to this. The Colorado State team was one of 15 that came to GM's Milford Proving Grounds last week for the final stretch of the EcoCar2 competition, which challenges regular college students who have no automotive experience to do nothing less than reinvent the American car. The teams have come from across North America, and include schools like Ohio State and Virginia Tech that have a long history of participating in similar competitions, and schools like the University of Washington and Embry-Riddle Aeronautical University that are here for the first time. After three years of work, it all comes down to this. The teams have operated 24 hours a day for almost two weeks here at the Proving Grounds, running a gamut of tests that include a 310-point safety inspection, emissions and energy-consumption tests and road tests, in which professional GM drivers ensure they're road worthy. The winning team will be announced tonight in Washington D.C. Revolutionary cars, ordinary package While other green-car competitions encourage extreme designs, this one comes with a somewhat constraining twist: Yes, students must improve fuel economy and reduce emissions, but in the end, they still have to have a car that would appeal to mainstream customers. In practical terms, that means they must keep conveniences like air conditioning and trunk space.