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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.

Forza Motorsport 6's new drivable Hot Wheels cars are the best

Each month, Turn 10 Studios releases a new car pack for the latest installment of its Forza Motorsport video game. Sometimes that means less-than-exciting stuff coming to our Xbox Ones – BMW X6M, bleh – but this time our inner seven-year-old is beyond ecstatic. Two of the seven cars are based on actual Hot Wheels models. And. They're. Awesome. First we have the 2011 Hot Wheels Bone Shaker. Yes, there are flames on the side. And yes, there's a giant skull where the grille should be. This one came from the imagination of "Mr. Hot Wheels" Larry Wood, whose design was so popular it inspired an actual real-world creation. Like all good things in this world, it's powered by a small-block Chevy V8. Oh, and it has no roof. This will be a popular one among gamers. The other digitized Hot Wheels creation is a 2005 Ford Mustang. A modest vehicle, sure, but the toy designers have festooned this pony car with a wild paint scheme and the body mods to emphasize it. Originally developed to celebrate the 'Stang's 50th birthday, this Hot Wheels car trades Americana for wild Japanese style. There's just one functioning life-size version of this car in existence as well, but if you look hard, you might be able to find one of the 1:64 scale models that inspired it. Other highlights from this month's car pack include the latest Ford Focus RS – finally time to replace that NASCAR-V8-powered, all-wheel-drive 2009 Focus RS – the 2015 McLaren P1 GTR, the 2016 Chevrolet Camaro SS, the aforementioned X6M, and Alain Prost's 1990 Ferrari 641 F1 car. The Hot Wheels Car Pack is available for download today. Related Video: Featured Gallery Forza Motorsport 6: Hot Wheels Car Pack News Source: Turn 10 Studios via YouTube Toys/Games BMW Chevrolet Ferrari Ford McLaren Racing Vehicles Performance video games Hot Wheels forza motorsport chevy camaro ss forza motorsport 6

Autoblog's guilty pleasure cars

Guilty pleasures are part of life – don't even try to pretend like you don't have one (or two, or six). In the non-automotive space, this could come down to that secret playlist in your iPhone of songs you'll only listen to when you're alone; or think of that one TV show you really do love, but won't admit to your friends. I've got plenty, and so do you. Going back to cars, here's a particularly juicy one for me: several years ago, I had a mad crush on the very last iteration of the Cadillac DTS. Oh yes, the front-wheel-drive, Northstar V8-powered sofa-on-wheels that was the last remaining shred of the elderly-swooning days of Cadillac's past. Every time I had the chance to drive one, I was secretly giddy. Don't hate me, okay? These days, the DTS is gone, but I've still got a mess of other cars that hold a special place in my heart. And in the spirit of camaraderie, I've asked my other Autoblog editors to tell me some of their guilty pleasure cars, as well – Seyth Miersma, as you can see above, has a few choice emotions to share about the Mitsubishi Lancer Evolution. Read on to find out what cars make us secretly happy. Mercedes-Benz SL65 AMG This decadent convertible is the epitome of the guilty pleasure. It's big, powerful, fairly heavy and it's richly appointed inside and out. It's a chocolate eclair with the three-pointed star on the hood. Given my druthers, I'd take the SL65 AMG, which delivers 621 horsepower and 738 pound-feet of torque. That output is borderline absurd for this laid-back convertible. I don't care. You don't need dessert. Sometimes you just crave it. The SL line is about the feel you get on the road. The roof is open. The air, sun and engine sounds all embrace you. It's the same dynamic you could have experienced in a Mercedes a century ago, yet the SL gives you the most modern of luxuries. An Airscarf feature that warms my neck and shoulders through a vent embedded in the seat? Yes, please. Sure, it's an old-guy car. Mr. Burns and Lord Grantham are probably too young and hip for an SL65. I don't care. This is my guilty pleasure. Release the hounds. – Greg Migliore Senior Editor Ford Flex I drove my first Flex in 2009 when my mother let me borrow hers for the summer while I was away at college. The incredibly spacious interior made moving twice that summer a breeze, and the 200-mile trips up north were quite comfortable.