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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.

Cars with the most reckless drivers are full of surprises

Insurify is a site for comparing auto insurance quotes. Because insurance shoppers need to submit information like the vehicles they're driving and the infractions they've compiled while driving those vehicles, Insurify has quite the database of correlations tying certain models to a habit of breaking certain laws. When the site's data analysts decided to compile a list of the top ten models for reckless driving citations in the decade from 2010 to 2019, the ranking contained a few wild entries. The Dodge Challenger making the countdown will surprise precisely zero people. But the Saturn L200? First, a definition: USLegal.com defines reckless driving as "driving with a willful or wanton disregard for safety. It is the operation of an automobile under such circumstances and in such a manner as to show a willful or reckless disregard of consequences." So this list is a caution about particular drivers more than the cars. For a baseline, according to Insurify data, for any random model, 15 out of 10,000 people who drive that model have picked up one citation for reckless driving. Back to that Challenger, then. No shocker for being here, but it's actually number 10, with 44 out of 10,000 Challenger drivers nabbed for a willful disregard of consequences on the road. That's better than the first surprise entry, the Saturn L200, a sedan only on sale for six years, with the least horsepower on the list, and out of production since 2005. The data set put drivers of GM's extraterrestrial sedan at 45 reckless pilots per 10,000 drivers. There are two pickups on the list, the only modern one being the Ram 1500 at eighth, with a rate of 46 in 10,000. Somehow, drivers of the third-best-selling pickup in the U.S. outrun the overwhelming numerical superiority of the best-selling vehicle in the States, the Ford F-150. The other pickup is the Chevrolet K1500 at number five, with a rate of 56 in 10,000. This is not only the oldest vehicle on the list, it went out of production in 2002, before any other vehicle on the list. Between the trucks, the Volkswagen CC slotted in at seven with 47 in 10,000 reckless driving chits, the Cadillac ATS slipped into sixth with 48 in 10,000.  The top four is a bag of unexpected. The Nissan 370Z is the first hardcore sports car on the list at number four, with 61 in 10,000 Z drivers flaunting their Fairladys in the face of Johnny Law.

Chevy reveals Colorado Z71 Trail Boss Edition

Chevrolet wants to make sure that if people are in the market for a midsize pickup, then there is a Colorado available to fit their desires. For businesses, there's the recently unveiled box delete package and for those looking for a customized look, there's the GearOn Edition. For the latest Z71 Trail Boss version, the automaker is going for folks planning to go off-road. As the name suggests, all Trail Boss versions of the Colorado start with the already off-road-inlined Z71 trim level, including its 305-horsepower, 3.6-liter V6 and six-speed automatic, and the package can be added to practically any body variant: extended or crew cab, long or short bed and rear- or four-wheel drive. To set things apart, there's a locking rear differential, front tow hooks, darkened 17-inch wheels that are shod with Goodyear Wrangler DuraTrac tires and on the four-wheel drive models, a transfer case shield. For some extra style, the Colorado Trail Boss wears black parts for the fender flares, side steps and Bowtie badges. The bed also gets a spray-on liner and a few parts from the GearOn accessory catalog, including the tie-down rings, load bar and cargo divider. The Trail Boss goes on sale in the spring, and to add all of this equipment to a Colorado, it costs $3,320 in addition to the price of any Z71 trim model. Related Video: Chevy Colorado Z71 Trail Boss Edition: On Point, Off Road When adventure calls, the Trail Boss has your back 2015-03-06 CLEVELAND – For those who want to blaze their own trails, Chevrolet introduces the 2015 Colorado Z71 Trail Boss edition today at the Cleveland Auto Show. The Trail Boss combines the capability of Chevrolet's Z71 off-road truck suspension package with more aggressive tires and additional appearance enhancements. It is offered in extended and crew cab configurations, with a choice of a long or short cargo bed and available 4WD. The Trail Boss goes on sale this spring with a starting price of $28,505 plus the package price of $3,320. "The Chevrolet Colorado Z71 Trail Boss Edition is equally at home blazing an urban trail or following one to a favorite remote campground," said Tony Johnson, Colorado marketing manager.