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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.

Here's the production Chevy Bolt

"It looks like a Volt had an evening of regrets with an i3." That's AutoblogGreen editor-in-chief Sebastian Blanco talking about the car you see here, the 2017 Chevy Bolt. Our trusty spy photographers caught the new Bolt EV fully uncovered at a photo shoot, ahead of its official debut at the Consumer Electronics Show in January. To say the styling looks familiar would be an understatement. There's a lot of Volt elements here, and the nod to the BMW i3 is definitely valid. It's not unattractive, it's just sort of, well, there. Never mind, the Bolt will have a lot going for it when it launches, should earlier rumors come to fruition. The hatchback is expected to have a 200-mile electric range, and should cost right around $30,000 after incentives. The Bolt will be built in Michigan, and will likely arrive at dealers in early 2017. Chevy knows this one's going to be huge, and the company is fully committed to launching and marketing the Bolt the right way. We'll have the full details in January at CES. For now, feast your eyes on His Boltness in the gallery above. Let us know what you think about it, in the Comments.

New Toyota Tacoma, Ranger, Colorado/Canyon fight for midsize truck dominance

Sam Wedll has been driving his Toyota Tacoma pickup on the rugged roads of Northern California for seven trouble-free years, racking up almost 100,000 miles, so he’s interested in the redesigned version of the truck coming later this year. He paid $34,000 for his truck in 2016, loading it with plenty of options. HeÂ’s eyeing the new gas-electric hybrid Toyota Motor Corp. is going to offer, but Wedll, who does his own repairs, isnÂ’t interested in paying luxury prices. “The hybrid is pretty interesting to me because I like the idea of the fuel efficiency,” says Wedll, 47, a casino operations manager in Blue Lake, California. “IÂ’m just trying to save some costs wherever possible.” The Tacoma, known as the Taco to its legions of loyalists, is the leader of the pack in midsize pickups, one of the fastest-growing auto markets of the past decade. With outdoorsy weekend warriors and do-it-yourselfers looking for a truck that could fit in their garage, sales of midsize pickups more than doubled from 2010 to 2020. General Motors Co. and Ford Motor Co., which abandoned the market segment when sales slowed early this century, returned with new trucks to take on the Tacoma, which has dominated the medium truck market for almost two decades. Although it's easy to predict that the most lushly appointed versions of the new Taco could approach $50,000 (prices wonÂ’t be announced until later this year), Toyota insists it isnÂ’t backing away from budget buyers even as it rolls out fancier trucks. The current Tacoma starts at $28,030, and the company says affordability is critical to its success. In fact, Toyota will continue to offer the Taco with an old-school stick shift. The Tacoma controls 42% of the midsize truck market and outsells FordÂ’s offering 4 to 1. ThatÂ’s a role reversal from the full-size pickup market, where FordÂ’s F-Series has ruled the road for 46 years. Tacoma sales in the U.S. surpassed 237,000 last year, more than twice the number of GMÂ’s No. 2-ranked Chevrolet Colorado, according to consultant LMC Automotive. But as growth in the overall segment slows, the midsize market is developing into more of a turf war, with manufacturers vying for the sweetest highest-margin spots. “This segment is likely past its prime growth spurt,” says Jeff Schuster, president of the Americas for LMC Automotive.