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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.

These were our favorite cars of 2022

Favorite cars is different than best cars. The idea of "best" can speak to value and overall competitiveness in a given vehicle segment. There's lots of objectivity involved and to do a "best" list right, one really must be very thorough and as scientific as possible. This is not that list. This is about our favorites, so objectivity be damned. If we liked a Challenger Hellcat because it made loud noises or a Honda Odyssey because it made for a particularly special family vacation, fair game. These were the cars that most spoke to our collection of editors and the ones that stayed in our minds and hung in our hearts long after they left our driveway. — Senior Editor James Riswick 2022 GMC Hummer EV Senior Editor, Green, John Beltz Snyder: I didn't particularly expect to like the new Hummer. I wasn't a fan of the Hummer H2 or H3, so I wasn't automatically enthusiastic about this electric reboot. Fast EVs aren't hard to come by — and, in fact, may be too easy to come by — so its performance specs weren't enough to win me over. Despite videos to the contrary, pickups aren't my favorite vehicular format. And its excessive size and weight turned me off ... until I finally got behind the wheel.  This thing is wildly entertaining to drive. Watts to Freedom launch control is a neat party trick, sure, but the novelty wears off quickly. The novelty of Crab Walk, however, has staying power. The rear-wheel steering makes this behemoth feel much smaller than it is — the maneuverability is incredible, and useful. The air suspension provides tons of clearance, including a ridiculously high-riding Extract mode. I can't wait for lesser versions of the Hummer to make their way to market. Give me less power (for less money), but keep the off-road tricks onboard, and I'll be a happy camper. Senior Editor, Consumer, Jeremy Korzeniewski: If I could afford to put one of these in my driveway, I would. Sadly, I can't, so I won't (What's that, Janet? I got the lyric wrong?). Still, I love the dumb thing. Thankfully, I have another choice down below. 2022 Porsche 911 GT3 Associate Editor Byron Hurd: Yeah, duh, Porsches are good. But there's good, and then there's GT3. This is the feeling every performance-oriented RWD tuner is trying to replicate. This is hard, precise, surgical and immensely satisfying. To begin to explore this car on a public road is by itself an admission that you believe yourself to be above the rules as they apply to normal drivers.

Why 2015 is going to be a huge year for trucks

Nissan chief executive Carlos Ghosn took center stage to introduce the 2016 Titan last week at the Detroit Auto Show. He spoke of the truck's new features, impressive Cummins V8 diesel engine and the extensive amount of time and money required to build a modern, competitive pickup truck. "We have done all of this because we see opportunity – an opportunity in the unmet needs of today's American truck customers," Ghosn said. He was speaking about the Titan, but his thoughts echo the industry's mindset: When it comes to trucks, find an opportunity and attack. Even with CAFE regulations looming and fickle consumer preferences, investing in trucks is a no-brainer for automakers. Some consumers will always need a truck for their job or lifestyle. And some people will always want one, whether they need it or not. With that in mind, here are four reasons why the pickup-truck sector is more important than ever and poised for growth in 2015. View 24 Photos The Nissan Titan Is Back Okay, it never left, but the Titan hadn't been redesigned since its launch in 2003, and Nissan sold more NV200s than Titans in 2014. It's an understatement to say the truck was languishing. That all changes with the 2016 model. The Titan will come in two variants, a traditional fullsize competitor and the Titan XD. The XD will lead the market launch, and it arrives late this year. It's pitched as a "whitespace" offering, Nissan sales and marketing vice president Fred Diaz said. The idea is to offer something in the general size and price range of a fullsize truck, but also have some of the capability of a heavy-duty truck. The XD uses a fully boxed ladder frame, the chassis design from Nissan's commercial division, and the wheelbase is about 20 inches longer than other Titan models. The XD, which Nissan is calling the flagship of the line, will be the only model with the 5.0-liter Cummins turbodiesel V8. It produces 310 horsepower and 555 pound-feet of torque, while being able to tow 12,000 pounds. V6 and V8 gasoline models will also be offered on the Titan XD and the standard, non-XD model. When production ramps up, the Titan will be sold with several cabs, beds and trims. New features include trailer sway control, an integrated trailer brake controller, more storage options in the cabin and even laminated front and rear side glass to reduce outside noise. All of this has given Nissan fresh confidence in an area where it admittedly has been lacking. "We can compete," Diaz told Autoblog.