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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.

2014 Chevrolet Corvette Stingray convertible headed for Geneva debut

While most of the world is still coming down from all the hype surrounding the debut of the 2014 Chevrolet Corvette Stingray at the Detroit Auto Show earlier this month, we're already looking to the future. And according to Autoweek, the next chapter in the C7 story will unfold at the Geneva Motor Show in March. That's right, General Motors is reportedly using the Swiss stage as its venue to debut the Corvette Stingray convertible.
If this strikes you as odd, you aren't alone. After all, with a car that's such an American icon, we'd fully expect Chevrolet to unveil it here on our shores in either Chicago or New York. But according to Autoweek, GM is looking to boost export sales of its halo car, and since the C7 was engineered to compete with the world's best and brightest, showing it off in Geneva is somewhat of a smart move. What's more, those with sharp memories will recall that GM used the Geneva expo to debut the sixth-generation C6 Corvette convertible back in March 2004, so there's also a precedent.
Details surrounding the Corvette Stingray convertible are still slim, though we fully expect the 6.2-liter V8 and choice of either six-speed automatic or seven-speed manual transmissions to carry over unchanged. Prototypes spotted on the road showed the car fitted with a cloth convertible roof, as well.

GM starting to talk seriously about 200-mile EV

We've been hearing word of a 200-mile EV from Chevrolet for a while now. First, there was General Motors then-CEO Dan Akerson hinting at a $30,000, 200-mile EV that would take the competition by surprise. Then Akerson confirmed that GM is working on a 200-mile EV in a speech in March. LG Chem, which supplies batteries to GM and other automakers, recently said it was working on batteries for EVs with a range of 200 miles. GM's head of global product development Mark Reuss just re-confirmed that there are plans for an EV with a 200-mile range, and sources have told Automotive News what that car will be. While Reuss didn't mention anything about a specific model or platform, two undisclosed sources with knowledge of GM's plans have said that an EV with a range of about 200 miles is indeed in the works, and that it will be based on the Chevrolet Sonic. The sources also gave a timeline for the car, saying it is slated for sometime in 2017. According to Reuss, the plan is for Chevy to offer a lineup of electric cars, with the 200-mile EV joining ranks of the Chevrolet Volt and the Spark EV. He didn't hint at a timeline, but if the sources are correct, we could see a Sonic EV being built within a few years. Reuss sees demand for it, too. When speaking of the Spark EV, currently only available in California and Oregon, he says that "people wish we would sell it all around the country." If he's right about that, it's not difficult to imagine people taking interest in Chevrolet's 200-mile electric car, whether or not it's a Sonic.