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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.

nuTonomy beats Uber to market with self-driving taxi rides, and the latest Corvette ZR1spy shots | Autoblog Minute

Software developer nuTonomy beats Uber to market with self-driving taxi rides in Singapore. A 124 Coupe could soon join Fiat's roadster lineup, and we have the latest spy shots of the new Corvette ZR!. Senior Editor Greg Migliore reports on this edition of Autoblog Mintue. Senior Editor Greg Migliore reports on this edition of Autoblog Mintue. Show full video transcript text [00:00:00] Massachusetts based software company, nuTonomy, launched its self-driving taxi service in Singapore this week. nuTonomy specializes in developing software for self-driving cars. Testing of the companies ride-hailing smartphone app occurred in Singapore, where riders were able to book a free driverless ride. nuTonomy's robo-taxi fleet is comprised of Renault Zoes and Mitsubishi i-MiEVs. Engineers from nuTonomy were present at this public launch as a safety measure. [00:00:30] The company will now continue to collect data and conduct more testing with its self-driving cars in Singapore, Michigan and the United Kingdom. nuTonomy has plans to offer widely-available commercial service in Singapore in 2018. nuTonomy's aggressive play in Singapore has put Uber and its partner Volvo in the unlikely position of playing catch-up. Autocar reported this week that we should expect FCA to add a Coupe [00:01:00] to it's 124 roadster lineup. When? Well, seeing as the 124 Spider just recently made it US dealers we may have to wait until next year to see a hardtop Fiata. It's tough to predict what kind of performance we can expect out of a 124 Coupe but in the U.S. the Spider has 160hp using a 1.4-l turbocharged engine. So the car you see in these pictures is actually Fiat's 124 Rally car that will be used for competition. [00:01:30] Now that's not exactly how the street car will look but it gives you an idea of what a 124 with a fixed roof is gonna look like. This week we got another look at what we think is the Chevy Corvette ZR1 and its massive rear wing. Now to be clear, the images that we're seeing are actually demonstrations. The car was actually captured without the rear wing. However, our spy photographers photoshopped the wing, which we've seen before, on some of these new shots just so you could get [00:02:00] a sense of what the car looks like driving around in it's most recent state. Now we think this car will make more than 700hp, which is kind of a magic number. The Hellcats from Chrysler make 707 so certainly GM wants to beat them.

Safety group pans GM’s new Marketplace in-dash shopping

When it comes to our cars, is the Internet of Things a godsend? Or a hidden menace that will create more problems than it will solve? On the same day General Motors announced it will equip newer-model cars with its in-dash Marketplace e-commerce app, a prominent safety group was shooting it down. National Safety Council President Deborah Hersman tells Bloomberg the technology will only contribute to distracted driving and hurt efforts to stem the tide of rising auto fatalities, which grew 5.6 percent to more than 37,000 in the U.S. in 2016. The National Highway Traffic Safety Administration says distracted driving was responsible for 3,477 fatalities and 391,000 injuries in 2015, the most recent year for which it has data. "There's nothing about this that's safe," Hersman told Bloomberg. "If this is why they want WiFi in the car, we're going to see fatality numbers go up even higher than they are now." Marketplace, developed with IBM, will allow drivers — or more often, one hopes, their passengers — to order coffee or food, find gas stations and reserve hotel rooms from their dashboard screens. The technology is set to be uploaded automatically to nearly 1.9 million GM vehicles model-year 2017 and later that are equipped with WiFi hotspots and compatible systems. By the end of 2018, about 4 million Chevrolet, Buick, GMC and Cadillac vehicles will be equipped with Marketplace. The app will debut with a limited number of participating retailers, including TGI Fridays, Shell, Exxon Mobil and Starbucks, with more likely to join later. Online retail giant Amazon is also partnering with automakers such as Ford to bring e-commerce capabilities inside the car through its Alexa personal assistant. While convenience is nice, one other thing is becoming clear as the IoT wedges its way into our cars: It's taking aim at some decidedly first-world problems.Related Video: Image Credit: GM Buick Cadillac Chevrolet GM GMC Technology Infotainment in-car entertainment marketplace e-commerce