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'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).

Top Gear names BMW i8 Car of the Year, Corvette, Ferrari, Mercedes also win big

The lads at Top Gear have released their listing of the finest cars of the past year, handing the ultimate honor to BMW's revolutionary i8 plug-in-hybrid supercar. "The i8 is a milestone in the annals of automotive history and a glorious statement for an exciting and positive future. The i8 delivers - and then some," the British mag wrote. The i8, though, was far from the only hybridized car to take victories. James May and Richard Hammond both highlighted hybrids as their personal cars of the year, with May saluting the Ferrari LaFerrari and the Hamster, unsurprisingly, heaping praise on the Porsche 918 Spyder. Jeremy Clarkson, meanwhile, opted to shock many by selecting not only an American car as his best of 2014, but giving the honor to of all things, a Corvette. Clarkson wasn't the only person to honor the USA's iconic sports car, with the new, 650-horsepower Z06 variant being named TG's Muscle Car of the Year. Other big winners include Mercedes-Benz, which TG honored for S-Class Coupe (Luxury Car of the Year), the new AMG GT (Sports Car of the Year) and the not-for-US C-Class Estate (Family Car of the Year). The 458 Italia Speciale A snagged a second win for Ferrari. The best of the rest include the Citroen C4 Cactus, Renault Twingo, Volkswagen Golf R, Lamborghini Huracan and Audi TT. Take a look below for the celebratory press blast from BMW. The BMW i8 wins Top Gear Car of the Year The BMW i8 has been named as Top Gear magazine's global Car of the Year 2014. The plug-in hybrid performance vehicle beat off some stiff competition from a host of other premium and luxury manufacturers to win the overall award. The editorial team of Top Gear commended the BMW i8 for its breadth of abilities. Its 1.5-litre three-cylinder turbocharged petrol engine combined with an electric motor gives searing acceleration and driver enjoyment but all wrapped in a package that takes BMW's EfficientDynamics philosophy to the extreme courtesy of CO2 emissions less than 49g/km and a 135mpg combined cycle figure. Charlie Turner, Editor in Chief at Top Gear magazine, said: "The BMW is a milestone in the annals of automotive history and a glorious statement for an exciting and positive future. The i8 delivers – and then some. It's the kind of car we should celebrate, a beautiful vision of the future, delivered now.

McLaren, Koenigsegg, Toyota, Ford, Dodge and Corvette Lego kits announced for 2021

Lego has announced a slew of car-themed sets for 2021. The six kits comprise nine vehicles and fall under the brick pusher's Speed Champion line of official OEM-licensed kits. News of their arrival comes from German toy retailer JB Spielwaren's pre-order listings, which show three single-car sets and three dual-car sets of matched marques. Starting with the McLaren Elva roadster, the kit consists of 263 pieces and is finished in blue. It seems to have a difficult time capturing the curves of the real-life Elva, but there's only so much you can do with a bunch of plastic blocks. Lego has made several other McLaren kits before, including the Senna, 720S, and a more advanced Senna GTR for the Technics line. Next up is the Koenigsegg Jesko, made up of 280 pieces and finished in white. Though the real-life Jesko is still curvy, this kit does a better job of replicating its aggressive maw, vents and cantilevered rear wing. Rounding out the single-car sets is the 299-piece Toyota GR Supra in yellow. This marks the first time Toyota has lent their license to Lego. Again, it struggles a bit to represent the curvy Supra, relying on printed details like logos and headlights to identify. On the other hand, the Chevrolet two-car does a stupendous job with the 1968 Corvette. The C3 is instantly recognizable as such. The C8-R race car it's paired with suffers from the same issues as some of the previous cars, though. The set contains 512 pieces, and funnily enough the C8 driver has short hair while the C3 driver sports a period-correct wavy mane. The next set is a 627-piece Mopar-themed pair, including a purple (Plum Crazy?) 1970 Dodge Challenger T/A and an SRT top fuel dragster. The race car is spot on, but the Challenger was probably tough to make given the width restrictions. It looks a couple of pegs too narrow compared to the wide proportions of the real deal. Last but not least, the Ford set contains a Bronco R and Ford GT Heritage Edition. Consisting of 660 pieces, the set does an excellent job of representing both cars. The GT looks faithful in its Gulf livery, and the Bronco R looks more like a real Bronco than the actual Bronco R race truck. All in all, it's always fun to see more Lego sets with real cars, and we're glad to see more manufacturers added to the roster. The single-car sets are recommended for ages 7 and up, while the double-car sets have an 8 years and up rating. Price in U.S.