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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.

Plug In 2014: VIA makes the case for 'free' plug-in hybrid work vans, trucks

If you're a fleet manager who's been waiting anxiously for the chance to buy a plug-in hybrid van from Via Motors, your wait is almost over. If you work for the right fleet, anyway. David West, the chief marketing efficer for VIA Motors, took AutoblogGreen for a ride around the San Jose Convention Center in a Via van sporting an Electric Blue paint job as part of the Plug In 2014 Conference this week and gave us an update on how things are coming along. The big news is that the Via PHEV van production is going to start by the end of September. Via can currently build two vans an hour at its production plant in Mexico, or about 16 a day and could easily double that. "That would get us to 20,000 a year with two full lines running," West said. "We have the capacity." "There is no way gas can compete with electric." – David West, Via Motors But they can't sell that many quite yet. By the end of December, around 350 Vans will be made, mostly for a $20-million program from the Department of Energy (DOE) and the South Coast Air Quality Management District that will see the vehicles used by fleets that will report energy data to the Idaho National Lab. Via is also finishing up CARB certification for both the van and the company's plug-in hybrid pick-up truck. About 50 percent of Via's technology in the truck will not need to be tested again, since it's the same as what's in the van, but things like crash tests will need to be done twice. Despite the progress, this is not where Via hoped it would be today. The bankruptcy of battery supplier A123, "took about a year off our timeline," West said. "It's been getting a little slow getting it to market, there have been some challenges, particuarly since we had the country's worst recession right in the middle of this wrap up, but it's inevitable in my mind. There is no way gas can compete with electric." Maybe that's why FedEx has expressed an interest in buying around 5,000 units, West said. FedEx already has some pilot vehicles, just like Verizon does, and PG&E wants to replace all of their gas trucks with electric vehicles, which would be another 3,000 sales, he said. Besides the fuel savings, vehicles like these, with easy on-site power generation, could also work wonders in post-disaster situations, he said, since they could replace the need for generators.

Kia Seltos, electric Cadillac and a looming Bronco | Autoblog Podcast #615

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder, and Associate Editor Byron Hurd makes his ABP debut. This week, they start with the cars they've been driving: the Jaguar XE, Kia Seltos, Hyundai Venue and Ford Escape. Then they dig into the news, including an upcoming Cadillac EV, Lincoln and Chevy sedans and the Ford Bronco. Finally, they help a listener replace his Jeep Patriot in the Spend My Money segment. Autoblog Podcast #615 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving: Jaguar XE 300 R-Dynamic S Kia Seltos Hyundai Venue Ford Escape Cadillac bringing EV to New York Auto Show Chevy and Lincoln dealers say they still want sedans Ford tells dealers the Bronco is weeks away from its global debut Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: 2020 Ford Escape 2.0T #POV drive