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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.

Disabled man realizes dream of driving with converted pickup truck

A man with a devastating illness is mobile once again thanks to a heavily modified pick up truck. He hopes he can help others in his situation gain the freedom of mobility they need to lead a normal life. Chris Sauerbaum has a physical disability resulting from chronic inflammatory polyneuropathy, a form of muscular dystrophy where the sufferer's immune system attacks their nerves. Sauerbaum lost both of his legs and is bound to a wheelchair. After 11 years of trying, he finally has a vehicle that he can drive. "You might as well be driving a Lamborghini," Sauerbaum told the York Dispatch as the driver side door extended to a lift to accommodate Sauerbaum's wheelchair. "Everyone comes up and talks to you. You come out looking like a Transformer." It wasn't easy getting transportation that fit his needs. First he bought a Chrysler PT Cruiser, which wasn't large enough to handle the equipment needed to convert the car for a legless driver. In 2013, Sauerbaum and his wife Heather Sloat appealed to local businesses and friends for donations. They raised $10,000 and were able to put a downpayment on a GMC Sierra. The truck then underwent $91,000 worth of upgrades. It was completely outfitted for Sauerbaum, with a large lift to bring his wheel chair up to the driver's seat and joysticks doing the work of peddles and the steering wheel. New York's Office of Vocational Rehabilitation paid for the conversion. "Think of it as a big remote controlled car. An 8,000 pound R/C car," Sauerbaum told the Dispatch. After a week and a half of learning the controls, Sauerbaum was able to drive with confidence again. He will no long need to rely on his wife to get him two and from work, an 80-mile trip each day. Sauerbaum and Sloat hope to start a nonprofit called Drive for Independence that will assist other wheelchair-bound people with the costs of getting a converted vehicle that suits their needs. "It's just one piece of the puzzle to get people to work," Sloat told the Dispatch. Related Video: Weird Car News GMC Driving Ownership Truck Videos disabled ms

Weekly Recap: Lamborghini fires on all cylinders

Lamborghini added 192 technicians and specialists in 2014 as the Italian automaker expands under the ambitious growth strategy of parent company Volkswagen AG. The additional workers helped Lamborghini increase its sales 19 percent last year to 2,530 supercars, and further expansion is planned for this year. Lambo has added more than 500 people in the last four years, bringing its headcount to 1,175. "Lamborghini is undergoing a strong phase of growth in both sales and in terms of recruitment," CEO Stephan Winkelmann said in a statement. "We invest significantly in our people ... in 2015 we plan to hire further." The supercar maker's solid performance last year came during a time of transition. Lambo sold off the final 265 Gallardos, which were the brand's best-selling models ever. Its 10-cylinder successor, the Huracan, immediately filled the void. It garnered 3,300 orders, and 1,137 of them were delivered in 2014. The other Lamborghini, the 12-cylinder Aventador, saw its sales increase 13 percent to 1,128 copies. The sales leap comes as Volkswagen drives sales expansion across its portfolio of brands. The German carmaker sold 10 million vehicles around the world for the first time last year. Though Lambo will never make supercars in great numbers, it is expected to contribute to VW's bottom line through its image and profitable sales. Look for further growth this year, and a Super Veloce version (shown above) of the Aventador has already been spotted during testing. Lamborghini has been working on a sport utility vehicle for years, though the company has never publicly approved the project. It also showed a hybrid, the Asterion, at last year's Paris Motor show, suggesting the automaker is considering an electric future. Other News and Notes GMC ponders Jeep Wrangler fighter GMC is considering adding a competitor to the Jeep Wrangler and has discussed the idea with its dealers, according to the Wall Street Journal. Details of the vehicle are unclear, but the report suggested the vehicle could have cues from General Motors' old Hummer brand. The move would broaden GMC's lineup of trucks and SUVs and attract new customers. GMC sold 501,853 vehicles in 2014, making it GM's second-best selling brand. GMC had more volume than Cadillac and Buick combined, though it's still well behind Chevrolet's tally of more than two million vehicles. The notion of a "Wrangler fighter" could be a moving target.