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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).

2016 Camaro gets most revealing tease yet

Chevrolet started its long teaser campaign for the 2016 Camaro by just revealing the exhaust manifold and front frame, but as time has passed the company has slowly unveiled more. In the latest glimpse ahead of the pony car's May 16 debut, we're actually getting to see the model's profile completely undisguised. As suggested by the recent tease of the rear and hood, the 2016 Camaro wears a sharper, more angular design than the current model. This is especially the case when you look at the taut lines making up the rear. Chevy claims that the new shape underwent 350 hours of wind tunnel tests to be able to generate left lift, improve cooling and reduce wind noise in the cabin. A smooth underbody pan is among the aerodynamic tweaks, and it runs from underneath the front grille to the center of the Camaro. Chevy asserts that all of the changes at the front help reduce lift by 30 percent. Related VIdeo: 2016 Camaro is all about the Aero Total aerodynamic lift improved by 30 percent for improved stability 2015-05-11 DETROIT – After 350 hours of wind tunnel testing – often 24 hours a day – the new Camaro will slip more easily through the wind, and drivers of the Camaro SS will experience a marked improvement in reduced aerodynamic lift. These changes illustrate the lengths the aerodynamics team went to for improved performance, stability, cooling and lower wind noise intrusion "The importance of aerodynamics increases exponentially as we increase vehicle performance," said Kirk Bennion, Exterior Design manager. "As engine output increases, we need more engine cooling. As acceleration and top speeds climb, we need to reduce lift for better high-speed stability. However, we cannot make any changes at the expense of increasing drag, which can hurt fuel economy. "To balance these different aerodynamic targets, we tested literally hundreds of changes on the new Camaro, millimeters at a time." For example, the initial design called for the lower grille bars to be set at a 20-degree angle to the horizon. However, after meticulous testing, the team improved engine-cooling airflow by 1 percent by shifting the angle to 13 degrees – a change that achieved the airflow target while maintaining the original grille design. And rather than a traditional front air dam to reduce aerodynamic lift, the team developed a flush belly pan that stretches from the front grille to the center of the vehicle.

VW, Jeep and Cadillac top list of most-tattooed car brands

Most car enthusiasts own at least one piece of gear with their favorite brand's logo on it. It can be a T-shirt, a pen, a hat, or a garage sign, for example. It takes a much greater degree of dedication to get a car-themed tattoo, and a study suggests this sky-scraping level of obsession is most often found in Volkswagen, Jeep, and Cadillac fans. Compare the Market analyzed Instagram hashtags and posts to compile a list of the most commonly tattooed brands. Volkswagen came out on top, with 5,507 posts; note that anything related to the Wolfsburg-based brand earns it a point, whether it's a logo, a cutaway diagram of the Beetle's air-cooled flat-four engine, or a Touareg V10's firing order. Jeep finished second with 2,139 posts, followed by Cadillac at 1,775 posts. Surprisingly, the fourth spot is occupied by Pontiac, which appeared in 1,609 posts in spite of the fact that it hasn't built a car since 2010. Holden appears near the very bottom of the top-20 chart, ahead of Lamborghini, and its result might be influenced by the fact that General Motors announced plans to shutter it earlier in 2020. BMW and Mercedes-Benz are in sixth and 12th place, respectively. Alfa Romeo doesn't appear in the top 20, though its decades-old Quadrifoglio logo (pictured) can easily be mistaken for a symbol of Irish luck. Searching for posts that show a tattoo of a specific model uncovered even bigger surprises. According to the same study, the most-tattoed nameplate is the Chevrolet Impala, which appears in 823 posts. Odds are the earlier generations, like Dr. Dre's famous six-four, are more often tattooed than the final-generation model, which unceremoniously went out of production in February 2020 without a direct replacement waiting in the wings. Second place goes to the DeLorean DMC-12, which has transcended its status as an esoteric fiasco on wheels thanks to its role as a time machine in "Back to the Future." It appeared in 800 posts. Chevrolet's Corvette takes a distant third with 180 posts, followed by the Volkswagen Beetle (147 posts) and the Mini Cooper (116 posts). All told, car-themed tattoos are relatively rare. To put some of the aforementioned numbers into context, searching Instagram for the hashtag Volkswagen yields over 15 million posts, while the hashtag tattoo appears in over three million publications. Auto News Cadillac Chevrolet Jeep