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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.

Chevy confirms Corvette Stingray Convertible for Geneva

Want proof that General Motors has increased global ambitions for its 2014 Chevrolet Corvette Stingray? It's staging the world premiere of the model's convertible variant at the Geneva Motor Show early next month.
As previously rumored, the droptop rendered above will debut at the Swiss show, making its first appearance anywhere on March 5. According to Susan Docherty, president and managing director of Chevrolet, the location makes sense because Corvette "...is an icon that has long been recognized and admired even in countries where it's never officially been offered."
While neither Chevrolet nor the Corvette has a major sales presence in Switzerland, the Bowtie's European headquarters is located in Zurich (about three hours to the northeast of Geneva) and GM has made it clear that it wants to build the Chevrolet brand up across Europe.

Chevy Volt 'Drive My Way' test cuts out the dealership

Last month, the 2016 Chevrolet Volt won the 2016 Green Car of the Year Award at the Los Angeles Auto Show. Awards are nice, but General Motors is now offering to make some folks' familiarity with the second-generation Volt a little more personal. Chevy is enacting what it calls the "Drive My Way" program, where the automaker brings a 2016 Volt directly to some prospective buyers for a 30-minute test drive with no dealer required, according to Hybrid Cars. Kind of like Tesla, only different. RedCap Valet is administering the program and is helping to track drivers' behind-the-wheel behavior, including keeping records on speed, acceleration, and braking habits. General Motors representatives didn't respond to a our request for further details about how many people will be chosen for the program or how these folks were picked to participate in "Drive My Way." Through November, the Volt's sales were down 23 percent from a year earlier to about 13,000 units, so any momentum for the 2016 version is a good thing. If you're just looking for numerical improvements, the new version has got you covered. It can go as far as 53 miles on electricity alone (about 15 miles further than the previous generation model) and it's got better miles per gallon and MPGe ratings as well. Of course, numbers alone aren't usually enough sell a car. Experience counts. So we ask, dear readers, if having a 2016 Volt brought to you for a half-hour test drive might make it more likely that you'll buy one of these extended-range plug-in vehicles. While you're waiting for a new Volt to arrive at your house, you can take a look here for our First Drive review. Related Video: Featured Gallery 2016 Chevrolet Volt: First Drive View 24 Photos News Source: Hybrid Cars Green Chevrolet GM test drive volt extended-range plug-in