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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 to reveal new Spark in Seoul and New York

Chevy is preparing to roll out an all-new Spark next month, giving us a taste of things to come with the teaser image above. The new Spark is set to debut simultaneously at car shows in Seoul and in New York on April 2, joining the new Malibu that will also mark its debut at the Manhattan expo. Why introduce the new Spark at the same time in South Korea and in the US, you ask? Probably because those are the two biggest markets for Chevy's smallest car, accounting for the lion's share of the 1.1 million units sold in 71 markets around the world since its introduction in 2009. Chevy hasn't revealed much about the new Spark, except to say that its styling will be more sophisticated than the "youthful whimsy" of the current model. A Spark of Sophistication Chevrolet's redesigned global minicar to debut in Seoul and New York on April 2 2015-03-09 DETROIT – The all-new 2016 Spark will debut on April 2 at the Seoul and New York auto shows, Chevrolet announced today. A sleeker, more aerodynamic profile and a progressive take on Chevrolet's signature design cues will give the redesigned Spark a more sophisticated aesthetic that reflects the changing tastes of the global minicar market. "The new Spark's design has evolved and grown up with the segment," said Michael Simcoe, GM International vice president of Design. "The youthful whimsy of the original Spark is still in its genes, but it is conveyed in more traditional proportions that reinforce the customer's refined expectations." Chevrolet has sold more than 1.1 million Sparks around the world since it went on sale as the Beat in India in late 2009. Today, the Spark is available in 71 markets worldwide, selling the most in South Korea, followed by the United States and Mexico. Spark is attracting younger and first-time car buyers to Chevrolet with 26 percent being under the age of 35. Sales of the Spark in the U.S. are up 32 percent in the first two months of 2015 versus the same period in 2014. Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 115 countries and around 4.8 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.

Join Autoblog editors for a full video tour of the 2019 Detroit Auto Show

The 2019 North American International Auto Show might have been a little more quiet than past years, but there were still some pretty major reveals, including the Toyota Supra, new Ford Explorer, Shelby GT500, Subaru WRX STI S209 and Kia Telluride. We also saw some lovely concepts like the Nissan IMs and Lexus LC Convertible. Senior Editor Alex Kierstein, Consumer Editor Jeremy Korzeniewski and Senior Green Editor John Beltz Snyder join me, Associate Editor Reese Counts — with Social Media Manager Michael Dylan Ferrara behind the camera — on a long walk through the show. We discuss cars, poke around the stands, dress a bloody wound and answer your questions in the Facebook comments. For more Detroit coverage, you can check out Autoblog's picks for the best in show, listen to our podcast or look at the best images from all the reveals. Finally, don't forget to watch Editor-in-Chief Greg Migliore hand over our 2019 Technology of the Year award. Related Video: Green Detroit Auto Show Acura Cadillac Chevrolet Ford GM Hyundai Infiniti Kia Lexus Nissan RAM Subaru Toyota Volkswagen Truck Convertible Coupe Crossover Hatchback Minivan/Van SUV Videos Sedan facebook 2019 detroit auto show live