1977 Chevrolet 1/2 Ton Pick Up Frame Off V8 Auto on 2040-cars

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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.

Chevy working on production Impala Midnight Edition

To put together the Impala Blackout concept for SEMA, Chevrolet didn't need to go much further than its accessories catalog. The in-house connection is what could make it possible for Chevy to get a production version of the Blackout into dealers this model year, with its few bits of chrome trim and dark detailing on the 19-inch aluminum wheels set into an abyss of gloss black paint, black Bowtie, grille surround, rear spoiler and mirror caps. The interior is black leather, with stainless steel for the sill plates and pedals, and an 11-speaker Bose audio system, and it gets the optional 305-horsepower, 3.6-liter V6. The brand's marketing director for cars and crossovers, Steve Majoros, told Edmunds that it could come in late spring, and that it will be called "Midnight Edition." Majoros didn't give any indication of pricing or if the production car will be spec'd out like the concept. If you simply don't want to wait for late spring, you could work your DIY mojo by putting one together the same way Chevrolet did: give the accessories catalog a workout. Related Video:

Ford Mustang chief engineer, mid-engine Corvette | Autoblog Podcast #488

Note: There were some technical difficulties that prevented some of you from downloading this week's podcast. The player and link below should be working now, and the file has reached iTunes and other feeds as well. Thanks to everyone who wrote in to let us know of the issues! On the podcast this week, we have some questions for Ford Chief Engineer Carl Widman. Plus, Associate Editor Reese Counts joins Mike Austin to talk about the latest news, most notably the spy photos of the upcoming mid-engine Corvette. We also chat about the Jaguar F-Type Coupe, the Nissan Armada, and why 0-60 mph is a stupid performance figure. And, of course, we get into some Spend My Money advice, telling strangers what car to buy. And new this week is a cost-no-object what-cars-would-you-buy game. The rundown is below. And don't forget to send us your questions, money-spend or otherwise, to podcast at autoblog dot com. Autoblog Podcast #488 The video meant to be presented here is no longer available. Sorry for the inconvenience. Topics and stories we mention Mid-engine Chevrolet Corvette spied Chevy Bolt EV comes with 238 miles of range Ford will sell self-driving cars by 2025 Jaguar F-Type Coupe 2017 Nissan Armada (yes, Mike knows it's not a Patrol) Ford Mustang Chief Engineer Carl Widman interview Spend My Money - we give purchase advice Why 0–60 mph is a stupid performance test Rundown Intro - 00:00 The news - 03:30 What we've been driving - 16:20 Carl Widman - 26:44 Spend my money - 37:03 New fun game - 51:48 0–60 mph is overrated - 56:50 Total Duration: 1:04:57 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 Feedback Email – Podcast at Autoblog dot com Review the show in iTunes Podcasts Chevrolet Ford Jaguar Nissan Car Buying nissan armada mid-engine corvette jaguar f-type coupe