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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).

Next-gen Chevy Silverado and GMC Sierra may use carbon fiber

It's been generally accepted that the next generation of full-size GM trucks will use some sort of strong, lightweight material for the beds while retaining steel for the cab. While aluminum seems like the most obvious choice, according to Automotive News, the Chevy Silverado and GMC Sierra will incorporate both aluminum and carbon fiber in their beds. The publication cites sources from within GM, though it seems the introduction of this comparatively exotic material mix is still a few years off. While carbon fiber is both stronger and lighter than steel and aluminum, it takes significantly more time and money to produce, essentially relegating the material to small-volume cars. The main benefit for trucks is the resulting reduction in weight to improve fuel economy without sacrificing the tough, rugged capabilities truck buyers expect. The Ford F-150 made the switch to aluminum for the 2015 model year and it's proved highly successful. It seemed like it was only a matter of time before the competition followed suit. Automotive News says that the next-gen trucks will launch with aluminum beds and that it will take a couple of years before we'll see any carbon fiber incorporated into the design. Even then, only look for the composite material on higher-trim models, with a trickle down to lower-spec trucks possible further in the future. In 2011, GM announced it was working with Japan-based Teijin Limited on a carbon fiber reinforced thermoplastic. There's a good chance that material's introduction will be on trucks. Related Video: News Source: Automotive News Plants/Manufacturing Rumormill Chevrolet GM GMC Truck

Full-size trucks are the best and worst vehicles in America

You don’t need me to tell you that Americans love pickup trucks. And the bigger the truck, the more likely it seems to be seen as an object of desire. Monthly and yearly sales charts are something of a broken record; track one is the Ford F-Series, followed by the Chevy Silverado, RamÂ’s line of haulers, and somewhere not far down the line, the GMC Sierra. The big Japanese players fall in place a bit further below — not that thereÂ’s anything wrong with a hundred thousand Toyota Tundra sales — and one-size-smaller trucks like the Toyota Tacoma, Ford Ranger and Chevy Colorado have proven awfully popular, too. Along with their sales numbers, the average cost of new trucks has similarly been on the rise. Now, I donÂ’t pretend to have the right to tell people what they should or shouldnÂ’t buy with their own money. But I just canÂ’t wrap my head around why a growing number of Americans are choosing to spend huge sums of money on super luxurious pickup trucks. Let me first say I do understand the appeal. People like nice things, after all. I know I do. I myself am willing to spend way more than the average American on all sorts of discretionary things, from wine and liquor to cameras and lenses. IÂ’ve even spent my own money on vehicles that I donÂ’t need but want anyway. A certain vintage VW camper van certainly qualifies. I also currently own a big, inefficient SUV with a 454-cubic-inch big block V8. So if your answer to the question IÂ’m posing here is that youÂ’re willing to pay the better part of a hundred grand on a chromed-out and leather-lined pickup simply because you want to, then by all means — not that you need my permission — go buy one. The part I donÂ’t understand is this: Why wouldn't you, as a rational person, rather split your garage in half? On one side would sit a nice car that is quiet, rides and handles equally well and gets above average fuel mileage. Maybe it has a few hundred gasoline-fueled horsepower, or heck, maybe itÂ’s electric. On the other side (or even outside) is parked a decent pickup truck. One that can tow 10,000 pounds, haul something near a ton in the bed, and has all the goodies most Americans want in their cars, like cruise control, power windows and locks, keyless entry, and a decent infotainment screen.