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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 Recalls 218,000 Chevy Aveo Models Over Fire-Prone Lighting

The recall train keeps on rolling for General Motors. Hot on the heels of its recent 2.4 million-vehicle recall of various models, it's now calling in 218,000 Chevrolet Aveo units from the 2004-2008 model years because they could catch fire. The problem concerns the daytime running light module in the instrument panel. It could overheat, melt and cause a fire. According to GM spokesperson Alan Adler, "We are aware of some fires," and the company "is still investigating." Adler wouldn't comment about how many fires were reported or when the automaker was first aware of this issue because of the ongoing analysis. However, he said the issue has not caused any injuries or fatalities. GM also doesn't have a fix for the problem with the DRL module yet. The company says in its recall statement to the National Highway Traffic Safety Administration that the remedy "is still under development." Adler wasn't sure when it would be ready, but he said Aveo owners would receive notification in the mail "relatively soon." They will receive a second letter later to schedule the repair. In a separate letter about the Aveo's problem to NHTSA (viewable here as a PDF), GM said its Executive Field Action Decision Committee decided to conduct the recall on May 16. Scroll down for the recall report. RECALL Subject : Daytime Running Light Module Overheating Report Receipt Date: MAY 19, 2014 NHTSA Campaign Number: 14V261000 Component(s): Potential Number of Units Affected: 218,000 Manufacturer: General Motors LLC SUMMARY: General Motors is recalling certain model year 2004-2008 Chevrolet Aveo vehicles equipped with daytime running lights (DRL). In the affected vehicles, there may be heat generated within the DRL module located in the center console in the instrument panel, which could melt the DRL module. CONSEQUENCE: If the DRL module melts due to the heat generation, it could cause a vehicle fire. REMEDY: The remedy for this recall campaign is still under development. The manufacturer has not yet provided a notification schedule. Owners may contact General Motors customer service at 1-800-222-1020 (Chevrolet). General Motors recall number for this campaign is 14236. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Watch how Corvette Racing's new collision-avoidance radar system works

When it comes to technology used in racecars, we generally expect it to trickle down to production cars, not the other way around. Well, Pratt & Miller has developed a new rear-facing radar that operates in a similar fashion to what we're used to in modern blind spot detection systems, only it is also capable of tracking cars as they approach and relaying vital information to the driver via a large display screen.
The innovative radar system debuted at last weekend's 12 Hours of Sebring for Corvette Racing, and this system makes perfect sense for endurance races like this since the cars sometimes have to drive through the night and in poor weather conditions.
The radar can detect cars even with poor visibility, and uses easy-to-distinguish symbols for the driver to identify.