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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 veteran Bryan Nesbitt tapped to head Buick design

General Motors styling veteran Bryan Nesbitt (pictured above) took over a new role on Monday as executive director of global Buick design and global architectures. Andrew Smith, who previously did that job and also coordinated the look for Cadillac, has remained in charge of the pen at Caddy with this shift. Nesbitt rose to prominence when he designed the Chrysler PT Cruiser, according to Automotive News. He joined GM in 2001 and has been there ever since in multiple high-level roles. In 2007, he was appointed vice president of design for North America and was later briefly general manager of Cadillac in 2009-2010. Nesbitt took over as the vice president of GM's international operations design in China in 2011. This shuffle also moves Ken Parkinson, currently styling boss for Chevrolet trucks, to China as design vice president there. In addition, John Cafaro becomes the person in charge of the look for Chevy globally, rather than previously splitting that role between cars and trucks with Parkinson. GM Global Design Leadership Changes – effective June 1, 2015. Bryan Nesbitt, Design Vice President, GM China will repatriate to North America and assume the position of Executive Director, Global Buick and Global Architectures. He will be located in Warren, MI. Bryan will be the design Champion for Buick in the US and China. Ken Parkinson, Executive Director, Global Chevrolet Trucks and Global Architecture will assume the position of Design Vice President, GM China. He will be based in Shanghai, China. Andrew Smith, Executive Director, Global Cadillac and Buick Design will assume the position of Executive Director, Global Cadillac. He will continue to be the design Champion for the Cadillac brand. In addition, he will continue to lead the Global Color & Trim team. He will be based in Warren, Michigan. John Cafaro, Executive Director, Global Chevrolet Cars will assume the position of Executive Director, Global Chevrolet. He will be the design Champion for Chevrolet. In addition, John will lead the exterior components and accessories team. He will continue to be based in Warren, MI. The roles and responsibilities of Helen Emsley, Mark Adams, Carlos Barba, Clay Dean, Michael Simcoe, and Teckla Rhoades remain the same. Related Video: The video meant to be presented here is no longer available. Sorry for the inconvenience.

Survey says $25k barrier is a problem for EVs

The majority of consumers are more or less priced out of the market.
Electric cars are gaining popularity with the general public, but are they still too expensive? According to a survey 1,084 consumers by Navigant Research, a consulting firm located in Boulder, CO, 71 percent want their next car to cost under $25,000, while 41 percent won't go a cent above $20K. Looks like people are even thriftier than we'd originally thought.