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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 to squeeze out more production capacity for midsize trucks

General Motors was predicting a strong showing for the Chevrolet Colorado and GMC Canyon before they debuted, and demand among dealers for the midsize trucks even exceeded company's expectations. The positive situation has left GM with a problem, though: finding ways to increase capacity for the pickups at the Wentzville Assembly plant in Missiouri. With a third shift already running, GM has continued to look for ways to build just a few more of the trucks at the plant. The company has plans to hire as many as 1,000 more workers for the Saturday and Sunday shifts to construct an additional 2,000 pickups a month, according to unnamed insiders at the factory speaking to Automotive News. The little adjustments even extend to getting rid of an unpaid break to add 18 minute of assembly time over the course of a day, which equals about 3,500 more vehicles a year. All of this effort comes because the trucks are in such high demand. According to GM's figures, the company has delivered a combined 35,720 units of the Colorado and Canyon from January through April 2015, and the Chevy was the fastest-selling truck in the US for the previous three months. In May, it spent an average of just 12 days in showrooms before being snapped up. And even better for the company, 43 percent of these buyers came from other brands. According to Automotive News, the most popular trade-ins have included the Ford F-150, Toyota Tacoma, and Dodge Dakota. Related Video:

Corvette Stingray gets optional Z06 components

If you've got a Corvette Stingray in the garage and have been tempted by some of the upgrades incorporated into the Z06, but can't quite bring yourself to trade up, Chevy has got some good news for you. The Bowtie brand has announced a series of performance parts derived from those in the Z06, but applicable to the base Stingray. The list of parts includes new cooling elements, prop shafts, brakes, suspension components, and underbody braces. They can all be fitted to Stingray models with or without the Z51 performance kit, and promise to raise the Corvette's game if not quite to Z06 levels, then closer to them. And for Z06 owners interested in gaining a bit more advantage, Chevy is offering a new Level 3 aero kit as well. The parts were demonstrated on upgraded 'Vettes at the Ron Fellows driving school at Spring Mountain. The school is also serving as technical partner and the track as the location for a new spec racing series built around the C7 Corvette. Dubbed the Michelin Corvette Challenge, the calendar is composed of fifteen half-hour races held in pairs over eight weekends, all on the six-mile circuit near Las Vegas. The cars to be used in the series will be close to showroom stock and feature many of the new Z06-derived upgrades, with Michelin racing slicks for dry weather and Pilot Super Sport tires in the wet. Perhaps most compelling of all will be the payment plan that will allow participating amateur racers to pay in installments across the season and take home their Corvette after the season's conclusion in December. New Z06 Parts Enhance Corvette Stingray Performance Broad range of chassis, suspension and aero components enhance capability 2015-11-02 PAHRUMP, Nev. – Chevrolet today and drivers from the Ron Fellows Corvette high-performance driving school at the Spring Mountain track demonstrated Stingray models enhanced with components from a new lineup of Z06-based performance parts. They're designed for 2014+ Stingray models, including Z51-equipped cars. "We've selected specific components from the Corvette Z06 and engineered them to fit the award-winning Stingray," said Jim Campbell, Chevrolet U.S. vice president of Performance Vehicles and Motorsports. "These Z06 parts enhance the handling, braking, cooling and downforce performance of the Stingray." Ron Fellows, champion Corvette Racing driver, collaborated with Chevrolet Performance engineers on the all-new portfolio.