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Helicopter crashes on Top Gear Korea set while chasing Corvette ZR1

The formula of Top Gear Korea is seemingly about the same as it is everywhere else in the world, including the flagship British original: involve interesting cars in fantastical situations with charismatic hosts. That prescription has proved to be pretty reliable over the years, and has lead to some truly memorable and exciting pieces of television.
Something like that was undoubtedly what the Korean producers were after when they lined up this segment - a drag race between a Chevrolet Corvette ZR1 and an AH1 Cobra military helicopter. The planners almost certainly did not expect the filming of the segment to go quite as wrong as it actually did, with the helicopter actually crashing into the dirt after the "drag race" had been completed. Thankfully, we're told that no one was seriously injured in the crash, but the footage, in the video below, is pretty damn chilling to watch, nevertheless.

Recharge Wrap-up: Renault Zoe recall, Proterra buses log 2M miles

Renault is recalling 10,649 examples of its Zoe electric car for potential brake hose failure. Cars built at the company's Flins factory between the Zoe's 2012 introduction and October 6, 2014 - a quarter of all Zoes ever built - are subject to the recall, though no accidents have been reported from rupturing brake lines. Recalled vehicles will have the brake hose positions inspected and, if need be, fixed. Read more from Reuters. Proposed legislation in Massachusetts would make the state even more EV friendly. While the state already encourages EV adoption with a $2,500 rebate incentive, the new bill would give battery electric vehicle drivers HOV lane access. Additionally it would set up a standard building code for EV chargers, and allow EV-only parking spaces. "With decreased gas prices, a 10 percent increase in vehicle miles traveled over the last 20 years, and a carpool rate below the national average, we must address personal vehicle use directly as part of our transportation emissions reduction strategy," says Rep. Frank Smizik. Read more from Teslarati. The New York Daily News has named the 2016 Chevrolet Volt as its "Green Machine of the Year." Seamless operation, peppiness, and a nice suite of equipment make it a top choice for the publication. "The 2016 Chevrolet Volt is all new, inside and out, and takes the plug-in hybrid segment to another level, thanks to its increased EV range, updated cabin, and more efficient gas-powered engine," writes Daily News Autos writer (and all-around good guy) Nick Kurczewski. Honorable mentions go to the Tesla Model S, BMW i3, Toyota Prius, and the hydrogen-powered Toyota Mirai. Read more from the Daily News, or at Clean Technica. Proterra electric buses have accumulated 2 million miles of revenue service. That equals 3,800 tons of carbon emissions that have been prevented and 420,000 gallons of fuel unburned. Proterra says it has 63 buses in service in 15 cities, and that it is ramping up production to meet growing demand. "This latest milestone exemplifies the economic, environmental and civic value of electric mass transit," says Proterra CEO Ryan Popple, "and demonstrates to the transit agencies that diesel - often viewed as a necessary evil - is no longer necessary." Read more at Inside EVs. Evercar, a unique EV carsharing service, has found success in Los Angeles. Evercar bills itself as carsharing for rideshare and delivery drivers.

'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).