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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).

New Chevy Malibu helps parents monitor teen driver's performance

For teens, a driver's license can represent freedom. For parents, it can represent fear. Now there's a way parents can alleviate some of their worries and monitor their teen drivers. The 2016 Chevy Malibu, which debuted Wednesday at the New York Auto Show, contains a new feature that tracks driving performance and helps inexperienced drivers rein in some of their more dangerous habits. Accessed through a password in the car's infotainment system, parents can learn how far their child has driven, how fast they've gone and how many times they've braked hard, among other features. "It's an in-vehicle report card that gives parents information," says Mary Ann Beebe, one of the lead engineers who designed the system. "It's meant to be used as a teaching tool. Parents can sit down and talk with their teen about, 'Here are some areas where you're doing well, and here's some where you can use improvement.'" Car accidents are the leading cause of death for teens ages 16 to 19, and only last week, AAA released a study that found their driving behavior can leave them particularly susceptible to crashes. General Motors had sought ways to help educate and train younger drivers. In an era where data can be harvested from cars, monitoring performance is one way to provide information. Parents access the Teen Driver system in the car through a PIN-number entered into the Malibu's infotainment system. The report card can only be seen in the car – so far, it's not available via a smartphone app, like some other types of on-board diagnostic information. The system is activated by the use of a specially programmed key fob that lets the system know who is driving the car. Once the vehicle recognizes the key fob, it takes preventive measures to ensure safer conduct behind the wheel: Until the driver and front passenger buckle their seat belts, the radio is muted. Safety systems such as forward-collision assist and electronic stability control are automatically turned on. Parents can preset preferred speed limits, and drivers will hear a warning if that sound is exceeded. "We have these great technologies, and we want to make sure we turn them on for the teen," Beebe said. There are no geo-location aspects of the program, and data is stored on the car, not uploaded to the Cloud or even seen by General Motors, she said.

How real is the Chevy Bolt EV and will it really cost $30,000?

"This is us bragging that we can do this kind of car." That's how Michael Simcoe, GM's executive director for NA exteriors, described the Chevy Bolt EV concept, which made a surprise appearance at the Detroit Auto Show today. While there was talk of a 2017 production debut, this is for sure a concept vehicle. But that means the ideas behind the vehicle are perhaps more important than the details. For example, no one is talking about what size battery might appear in a production Bolt, but Simcoe would talk about how rapid progress in battery improvements made it possible for GM to make the bold Bolt declaration that promises 200 miles and a price tag of around $30,000 (after incentives). But if the Bolt makes it to market, it won't be until 2017 (as rumored) or later, is it really fair to promote the car as being available with a federal tax credit? For one thing, credits for plug-in vehicles may change in the next few years, but if the laws stay the same, each manufacturer is limited to 200,000 vehicles before the credits start to decline. GM is justifiably proud that it's sold over 70,000 Volts thus far, but with a new model coming out later this year and a few years to go until the Bolt potentially arrives, GM could be pushing right up against that 200,000 limit when the Bolt goes on sale. But Volt executive chief engineer Pam Fletcher told AutoblogGreen that, "We're just trying to take some of the confusion out." "Think about talking to the average consumer," she said. "First, going through the explanation of how the federal tax credit was set up, how it's being used and so on. [In the industry, we] have the luxury of understanding the nuances of that regulation, but right now people who aren't in the marketplace, they don't have the luxury of all that. It's already hard to communicate the details so we gave them data in a way that is what they're used to seeing." There was one question that drove the two-year Bolt gestation and design period, Simcoe said: What does a better battery offer a vehicle designer? "We've got a number of spaces we play in for powertrain technology and obviously electrification is one of them," he said. "With Volt 1 and then the Spark EV, with that development and batteries getting better for us, we started doing some practical packaging to deliver a vehicle which was not the traditional aero form which you see around electric vehicles.