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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).

GM investing $439 million in Corvette plant

General Motors is slowly trickling out announcements about its $5.4 billion in US plant upgrades over the next three years. The latest one is something that fans of one of America's most beloved sports car will be happy about. The Bowling Green, KY, factory that assembles the Chevrolet Corvette is receiving $439 million of those funds to build a new paint shop. Covering 450,000 square-feet, the site will make painting the 'Vette more efficient and environmentally friendly. The upgrades there include robots that use paint more effectively, technology to eliminate sludge water, LED lighting to improve inspections, and less energy-intensive baking ovens. While the groundbreaking is already complete for the building, full construction is expected to begin this summer and take two years. This is the biggest upgrade for the Kentucky factory in a few years. In preparation for the latest Corvette, the Bowling Green plant received $131 million in 2011 for upgrades and to add more workers there. Related Video: Chevrolet Corvette Plant Gets $439 Million in Upgrades New, environment-friendly paint shop drives efficient production, retains 150 jobs 2015-05-21 BOWLING GREEN, Ky. – Torch Red, Shark Gray Metallic and Laguna Blue Tintcoat, three popular palate choices on the 2015 Corvette, kept the marketers who make up names working late. Now they can dream about more painstakingly precise pigments, thanks to a new paint shop that is among $439 million being invested at the only plant in the world that builds Chevrolet's iconic sports car. General Motors announced the moves today that include retaining 150 jobs and building the 450,000 square-foot paint shop that is almost half the size of the entire current production facility. The investment builds on approximately $135 million GM has invested in the plant over the last four years for the new Corvette Stingray and Performance Build Center. The announcement was followed by a groundbreaking event for the new paint shop. "The Corvette is one of Kentucky's most-cherished icons," said. Lt. Gov. Crit Luallen. "Such a significant expansion of the Bowling Green Assembly Plant will help the company remain competitive in the region and around the world." Construction of the new paint shop, which includes substantial technology upgrades, is planned to begin this summer and take approximately two years to complete. Corvette production schedules will be unaffected by the construction.

China's rise, global restructuring wither GM's Korea division

An article in the Daily Kanban suggests the sun is setting on GM Korea, and it could already be well into dusk. GM Korea came about when General Motors, along with co-investors SAIC and Suzuki, bought Daewoo Motors from parent company Daewoo Group in 2001; it had a previous tie-up with GM, a joint venture that ended in 1992, although Daewoo cars were based on GM cars until 1996. Over the decade following the purchase, it became such an important part of operations that it was renamed GM Korea in 2011, "to reflect its heightened status in [the] global operations of GM." Just two years later, the printed rumors were that the subsidiary responsible for a fifth of Chevrolet's global production could be shutting down. The division's sales were down almost 21 percent through November of last year, counting domestic South Korean sales, exports, and CKD – Complete Knock Down – products. That makes the labor strife, already an issue for four years, even more acute, reports say the subsidiary will lose $36 million a year if it can't get the job and wage cuts it wants, and government concessions can't make up for the losses. And it gets worse, so head over to Daily Kanban to read the rest of the story.