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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).

2014 Chevy Cruze Diesel arrives with 42 mpg for $25,695*

The last time General Motors had a diesel passenger car in the US, it was the 1.8-liter 1986 Chevette. At the 2013 Chicago Auto Show today, GM is unveiling the much-anticipated 2014 Chevrolet Cruze Diesel. The compact bows with a 2.0-liter turbo-diesel four-cylinder engine that boasts 148 horsepower and 258 pound-feet of torque, with full twist coming on at just 2,000 rpm. What's more, the common-rail, direct-injection diesel features an overboost function that allows the engine to deliver up to 280 lb-ft of torque for 10 seconds at a time. Even with 10 more horsepower and 110 more pound-feet of torque than the available turbocharged 1.4-liter four-cylinder in the Cruze, the 2.0-liter diesel engine can return up to 42 mpg (highway) bolted to its six-speed automatic transmission.
If you're counting, that figure meets the less powerful Cruze Eco with a six-speed manual transmission. More importantly, the auto transmission Cruze Diesel matches its main competition, the Volkswagen Jetta TDI, in highway fuel economy. The Cruze 2.0 TD (as it will be badged) can also handle up to 20 percent biodiesel (B20), whereas the Jetta is rated only for B5. General Motors has not released city fuel economy for its newest diesel, but we do know how much it will cost you to jump behind the driver's seat.
GM will kindly ask for $25,695, plus an $810 destination fee. That marks a $2,115 premium over a loaded Cruze LTZ Auto and $2,640 more than the Jetta TDI, though the MSRP will net you a leather interior, 17-inch alloy wheels and an Aero Performance Package, as well as a two-year maintenance plan and five-year, 100,000-mile powertrain warranty. Compared to the gas-powered Cruze, you also lose a couple cubic feet of rear cargo space thanks to a 17-liter diesel emission fluid tank. That urea fluid, which helps put the clean in clean diesel, will need to be refilled at least every 10,000 miles.

Chevrolet only automaker to win EPA's 2015 Climate Leadership Awards

Chevrolet was the only automaker to be on the list of entities for the US Environmental Protection Agency (EPA) Climate Leadership Awards. Of course, the accolades had nothing to do with any vehicle's tailpipe emissions, General Motors can still be proud. The automaker is engaging in what it calls the Chevrolet Clean Energy Campus Campaign. Chevy is working with the US Green Building Council, among other groups, to find ways for buildings in primary and secondary schools as well as college campuses to reduce their collective carbon footprint via better design. The EPA pointed out the "carbon performance methodologies" used by Chevrolet to run the program and spur lower emissions from its campus partners. The effort is part of Chevrolet's broader goal to reduce greenhouse-gas emissions by as many as 8 million metric tons of CO2. And it's going to take more than bunch of plug-in Volt and Spark EVs to do that. Other entities feted by the EPA include UPS, Bank of America, the cities of San Francisco and Oakland, Clorox and Tiffany & Co. Yes, Tiffany. Take a look at the EPA's press release below, and find out more information on Chevy's program here. UPS, Bank of America, SC Johnson Among 16 Organizations across the U.S. Recognized for Climate Action / EPA also recognizes Chevrolet Clean Energy Campus Campaign, San Diego Regional Climate Collaborative in new Innovative Partnerships Category WASHINGTON – From an innovative partnership enabling colleges to sell carbon credits to fund clean energy projects on campuses to some of the country's leading corporations setting and exceeding aggressive emission reduction goals, the U.S. Environmental Protection Agency's Climate Leadership Award winners announced today are demonstrating that innovative actions to combat climate change are smart business decisions. Sixteen organizations and one individual representing a wide array of industries from finance and manufacturing to retail and technology show exemplary corporate, organizational, and individual leadership in response to climate change. "I am proud to recognize our Climate Leadership Award winners for their actions to reduce the harmful carbon pollution that's fueling climate change," said EPA Administrator Gina McCarthy. "Our winners are demonstrating that a healthy environment and a strong economy go hand in hand.