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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.

Watch this time-lapse build of the Chevy SS for NASCAR

There's only about a week left until we get our first look at the production version of the 2014 Chevrolet SS sedan, but Chevrolet NASCAR teams have been looking at the race version of the car all winter. Autoweek has posted a really neat time-lapse video showing just a portion of what it takes to build one of NASCAR's new Gen6 stock cars.
Though the video is quite brief, it does show almost the entire build process starting with just the car's nose, and it gives us a good look at how integral the template is to the final product. As a bonus, Hendrick Motorsports also provided some videos showing two of its teams performing pit stop tests over the winter. The second video shows some of the more detailed aspects of the racecar's rear end, including the stock-looking trunk cutout and a newly mandated rear bumper extension that will be used on super speedways like Daytona and Talladega.
To see what Team Chevy has been up to all off-season, check out all three videos posted after the jump.

2022 Chevrolet Silverado and GMC Sierra now cost more, again

GM Authority put Chevrolet and GMC pickup truck prices under the microscope, spying the same macroscopic issues none of us can avoid seeing: Price increases. The 2022 Chevy Silverado 1500 and 2022 GMC Sierra 1500 have been hit with their third price increases this year. The Heavy Duty versions of those same trucks have been given their fourth price increases this year. Starting with the light-duty options, they've been rung up for another $900 across the board, which breaks down to $800 added to the MSRP and $100 added to the destination charge. The mandatory cost for shipping a truck from the factory to the dealer is now $1,795. That destination fee is now more than 5% of the purchase price of the least expensive 2022 Silverado, the Regular Cab Work Truck trim with a Standard Bed and 2.7-liter turbocharged four-cylinder retailing for $36,395 after destination. And that price is $3,200 more than the initial list price from last December. At the other end, the Silverado ZR2 is up $3,400. Average that out, and the Silverado's MSRP has gone up by nearly $700 every month since initial pricing came out. On the GMC side, the bidding starts at $37,195 for the Regular Cab Pro trim with a Standard Bed, a $4,700 increase over pricing announced last October.  Stepping up a tow rating or two, the Silverado HD is now $1,100 more expensive — $1,000 tacked onto the MSRP, the destination charge plumped another $100 to $1,795. The Silvy 2500 HD now starts at $41,295. The Sierra HD turns the screw a few more degrees, going up by $2,100 after the $100 increase for destination. The low bar for the Sierra 2500 HD is $41,995, a $4,100 rise over the price when it hit dealer lots last summer. Whew. Anyone know where the exit is for this "new normal?" Related video: