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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.

VW, Jeep and Cadillac top list of most-tattooed car brands

Most car enthusiasts own at least one piece of gear with their favorite brand's logo on it. It can be a T-shirt, a pen, a hat, or a garage sign, for example. It takes a much greater degree of dedication to get a car-themed tattoo, and a study suggests this sky-scraping level of obsession is most often found in Volkswagen, Jeep, and Cadillac fans. Compare the Market analyzed Instagram hashtags and posts to compile a list of the most commonly tattooed brands. Volkswagen came out on top, with 5,507 posts; note that anything related to the Wolfsburg-based brand earns it a point, whether it's a logo, a cutaway diagram of the Beetle's air-cooled flat-four engine, or a Touareg V10's firing order. Jeep finished second with 2,139 posts, followed by Cadillac at 1,775 posts. Surprisingly, the fourth spot is occupied by Pontiac, which appeared in 1,609 posts in spite of the fact that it hasn't built a car since 2010. Holden appears near the very bottom of the top-20 chart, ahead of Lamborghini, and its result might be influenced by the fact that General Motors announced plans to shutter it earlier in 2020. BMW and Mercedes-Benz are in sixth and 12th place, respectively. Alfa Romeo doesn't appear in the top 20, though its decades-old Quadrifoglio logo (pictured) can easily be mistaken for a symbol of Irish luck. Searching for posts that show a tattoo of a specific model uncovered even bigger surprises. According to the same study, the most-tattoed nameplate is the Chevrolet Impala, which appears in 823 posts. Odds are the earlier generations, like Dr. Dre's famous six-four, are more often tattooed than the final-generation model, which unceremoniously went out of production in February 2020 without a direct replacement waiting in the wings. Second place goes to the DeLorean DMC-12, which has transcended its status as an esoteric fiasco on wheels thanks to its role as a time machine in "Back to the Future." It appeared in 800 posts. Chevrolet's Corvette takes a distant third with 180 posts, followed by the Volkswagen Beetle (147 posts) and the Mini Cooper (116 posts). All told, car-themed tattoos are relatively rare. To put some of the aforementioned numbers into context, searching Instagram for the hashtag Volkswagen yields over 15 million posts, while the hashtag tattoo appears in over three million publications. Auto News Cadillac Chevrolet Jeep

Burt Reynolds' vehicles up for auction at Barrett-Jackson

Burt Reynolds' influence on car culture cannot be overstated. Be it "Smokey and the Bandit" or "Cannonball Run," his films inspired a generation of car enthusiasts. He died a few weeks back from cardiac arrest at age 82. This weekend, four vehicles from Reynolds' personal collection — three Pontiacs and a Chevy — will go up for auction at Barrett-Jackson in Las Vegas. It seems Reynolds had plans to sell the cars before he passed. He even filmed a short teaser for the auction and planned to attend the event himself. Three of the cars are Pontiac Trans Ams. Two are re-creations of the cars he drove in "Bandit" and the film "Hooper." Both are 1978 models. The third Trans Am is from 1984 and was used to promote Reynolds' USFL team, the Tampa Bay Bandits. The fourth vehicle is a 1978 Chevy R30 pickup truck. It's styled like the truck he drove in "Cannonball Run." None of the vehicles were actually used in the movies. But they were registered in his name, making them far more legitimate than some other movie-inspired clones. It's unclear how many Bandit Trans Ams Reynolds has owned over the years. Another car connected to him sold for $450,000 back in 2014. His death is sure to drive the price of these new cars even higher. Related Video: Image Credit: Barrett-Jackson Celebrities Chevrolet Pontiac Auctions Truck Coupe pontiac trans am burt reynolds