2000 Chevrolet Z71 Extra Cab Ls Truck 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.

2015 Chevy Tahoe gets Police Patrol Vehicle treatment

That was fast. Mere days after showing a Police Concept based on the 2015 Tahoe at the SEMA Show, Chevrolet has announced that it will build a PPV model based on the SUV to do battle with the Ford Police Interceptor Utility (Explorer) and Dodge Durango Special Service.
You'll recall that the Tahoe has been police staple for several years, predating both the Explorer and Durango police variants, so the fact that the new model would spawn a police variant is hardly surprising. Like the civilian model, the 2015 PPV benefits from a more efficient 5.3-liter, direct-injection V8 that pumps out 355 horsepower and 383 pound-feet of torque. It also features more high-strength steel, offering better crash protection, on top of optional safety items like lane departure warning, forward collision alert and a Safety Alert Seat.
The press release is rather light on police-specific items, aside from the auxiliary battery, which keeps the myriad of electronics in a modern police car running even when the engine isn't. Lightbars, 17-inch steel wheels on Goodyear Eagle RS-A tires and a push bar round out the mods for the Tahoe PPV. The cabin features a revised center console and room for laptop and other equipment mounts.

Recharge Wrap-up: Chevy Volt's new, improved powertrain; Inabikari wants to build Tesla Model X fighter

We knew the 2016 Chevrolet Volt's new powertrain would provide more range, but we didn't know how much. According to GM's Executive Director Larry Nitz, it is about 12 percent more, overall. "I can't think of a powertrain we've re-engineered more extensively within a five-year period than this one," he said. The battery, electric drive system and gasoline generator have all been reworked to allow for an overall driving range of up to 425 miles, with electric range speculated to reach 42 miles or more. The new Volt will also benefit from 20 percent quicker low-end acceleration, weight reductions and improvements in NVH. Read more at Hybrid Cars and at the SAE website. Hyundai's FCEV research and development boss, Dr. Sae-Hoon Kim, is optimistic about the future of hydrogen mobility in Japan. With the Tucson Fuel Cell already in production ahead of Toyota's FCV, Hyundai has a foothold in the hydrogen car scene. Kim believes that since the Fukushima disaster, Japan's attitudes toward energy make it friendly to a growing hydrogen economy. He also says that hydrogen won't be limited to Hyundai, with Kia getting all the battery EVs. "Both types are for both companies," Kim says. "For the moment, volumes are small and it is not wise to have Hyundai and Kia competing." Read more at Just Auto. The Latvian/German startup Inabikari is using crowdfunding to build an electric crossover for Europe. The Rev.01 EV hopes to compete with Tesla's upcoming Model X with a range of over 400 miles and a five-second 0-60 time. The group currently is trying to raise initial funds through an Indiegogo campaign, with hopes of more investment in the future and sales beginning in 2017. See the video below, and read more at Hybrid Cars and at the Inabikari website. Fuel economy and emissions regulations could lead to some interesting design changes to automobiles. The World Light Duty Test Procedure, set to replace the New European Driving Cycle in 2017, will push automakers to find new ways to reduce drag on their vehicles. For better aerodynamics, we could see traditional side-view mirrors replaced by cameras that display what they see on screens inside the vehicle. Another likely change will be the introduction of smaller, narrower wheels. Improving the average drag coefficient from 0.32 to 0.20 could reduce CO2 emissions by as much as 20 percent. Read more at Automotive News Europe.