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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).

2015 Chevy Silverado Custom Sport is subtle in black

In a world where trucks are growing bigger, bolder grilles and more muscle-bound looks, Chevrolet is trying something a bit different with its recently revealed Custom Sport edition for the 2015 Silverado at the this year's Detroit Auto Show. The edition leans on being understated, instead of screaming about its abilities. The design is supposed to be a throwback to the Chevy Custom Sport Trucks of the late '60s that brought a touch of elegance to these usually utilitarian vehicles at the time. The heart of the package is its monochromatic body-color touches for the bumpers and grille surround. The one on display at the show is especially attractive with a chrome-accented black grille that fits perfectly with the rest of the body. The edition does get a bit more shine with chrome covering the 20-inch wheels, door handles, mirror caps and side moldings. In addition, buyers get projector beam headlights, tow hooks and heated power mirrors. The custom package is available on the LT trim in black or white and on the LTZ in black or White Diamond Tricoat. Take a look at this monochromatic take on the Silverado as it sits in the Motor City. 2015 SILVERADO OFFERS CUSTOM SPORT PACKAGE Inspired by Chevy Custom Sport Trucks that helped launch personal-use pickups DETROIT, 07/01/15 – With the new 2015 Silverado Custom Sport special edition, Chevrolet pays homage to one of its most iconic pickups, adding a sophisticated monochromatic look to double- and crew-cab Silverados. The Custom Sport package features body-colored front and rear bumpers and a body-colored grille surround with a chrome-accented black grille. Other accents include 20-inch chrome wheels, chrome door handles and mirror caps, and chrome body-side moldings. The package also includes projector beam headlamps, tow hooks and heated power-adjusted mirrors. "The Custom Sport special edition was inspired by Chevy Custom Sport Trucks of the late 1960s," said Sandor Piszar, Chevrolet Trucks marketing director. "Those CST models added a touch of elegance to a great all-around truck, just like the Custom Sport package for the new Silverado." The redesigned 1967 Chevrolet pickup entered the market at a time when trucks were starting to move off the jobsites and into the driveways of cities and suburbs. The 1967 Custom Sport Truck, with its bright trim, plush carpet and bucket seats, helped launch a wave of personal use pickups that continues today.

Performance cars overpower the Detroit Auto Show

At precisely the stroke of noon on Monday, the 2016 Acura NSX rolled on stage at the Detroit Auto Show amid plumes of smoke and dancing lights. The sounds of the powerful engine revving soared to the rafters. It was the second coming of Acura's iconic sports car, and the reveal had all of the expected trappings. Afterwards, champagne corks popped and the bubbly flowed. It was noon in Detroit, but for the green-car movement, it seemed like the clock had struck midnight. That's an exaggeration, but performance was the overwhelming theme of North America's most important show. Ford – which has helped lead the way in smaller displacement engines and early adoption of hybrid powertrains – had more than 1,500 horsepower on stage one point after it revealed the GT concept, the new F-150 Raptor and the Shelby Mustang GT350R. The NSX is technically a hybrid (it has three electric motors), but with 550-plus hp, there's no doubt this Acura was bred on the track. The theme continued throughout the show at nearly every stand. Alfa Romeo showed off the 4C Spider, which is the open-air version of a car that purports to be the spiritual successor of the high-performance 33 Stradale from 1967. On Tuesday, Cadillac is scheduled to reveal the 640-hp CTS-V with the V8 transplanted from the Corvette Z06, and the Lexus was expected to roll out its own V8-powered beast, the 467-hp GS F. For enthusiasts – especially enthusiasts with money – these are halcyon days. But make no mistake, all of this power has a purpose. Ford product chief Raj Nair said the Blue Oval uses high performance cars to develop technologies, like aerodynamics and materials, which are then shared across its lineup. "It's another proof point about how serious we are in developing innovation through performance," he said. Ford, which is rolling out at least 12 performance cars by 2020, said the sporty cars attract younger and more influential buyers to its fold, which can help burnish its image beyond adding sales volume. Toyota is taking a similar approach, senior vice president Bob Carter said, noting the Lexus RC coupe draws people into showrooms and gets them excited about the brand, even if they don't end up buying one. "They provide an aspiration and a halo that provides the attention that gets you noticed in a cluttered market," he said.