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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).

2019 Nissan Leaf Plus vs. Chevy Bolt, Hyundai Kona Electric: How they compare on paper

Buying an EV once meant choosing either a reasonably priced model with paltry range and weak power, or a massively expensive one with a decent range. But today we have not one, but three options with reasonable prices and healthy ranges of over 200 miles. The latest of which is the 2019 Nissan Leaf Plus, which brings a bigger battery and a more powerful motor over its entry-level counterpart. The question is, how does it stack up with the defending entries in this segment, the 2019 Chevy Bolt EV and Hyundai Kona Electric? To get an idea, we've gathered up the specifications of each electric hatchback for comparison. We'll take a look at power, torque, electric range, charging options, interior space and the all-important pricing and incentives. You can see the raw numbers in the chart below, and additional insights in the text beyond that. If you'd like to compare these cars with other vehicles, be sure to check out our comparison tools. Range and power No matter how much electric cars improve their overall range, range anxiety is going to be an issue for a while, meaning every mile counts. The Kona Electric is the hands-down winner, managing 258 miles from its 64-kWh battery. Next is the Chevy Bolt EV at 238 miles from the group's smallest 60-kWh battery, followed by the Leaf Plus with 226 miles from a 62-kWh battery. For those who want to get really deep into energy usage, the Bolt EV and the Kona Electric have the same EPA rating for energy consumption of 28 kWh per 100 miles, meaning they're equally efficient. This is particularly impressive for the Kona, since it weighs nearly 300 pounds more than the Bolt. Something else to consider with these electric cars are charging options. All three have 120-volt level 1 and 240-volt level 2 charging capability standard, but only the Leaf Plus and Kona Electric give you DC fast charging capability for free. To get it on the Bolt EV, you'll spend an extra $750. Speaking from experience, you'll want DC fast charging if you plan on doing any long trips. 2019 Nissan LEAF e+ View 26 Photos As for the motors propelling these EVs, there's very little difference. The Bolt and Kona are neck-and-neck with 200 and 201 horsepower respectively. The Leaf has a few more horses at 216. In the torque department, the Leaf is last with 250 pound-feet, and the Bolt is just ahead at 266. The Kona is a serious twister with 290 pound-feet.

Rumor: 2016 Chevy Volt gets 53 miles EV range, 40% increase

While we're still waiting for the official word from GM, news is creeping around the Internet that the 2016 Chevy Volt will get a big boost in all-electric range and gas-burning efficiency. According to new rumors out today, the second-gen Volt will be able to go 53 miles on a full charge, have 106 MPGe and be able to get 42 miles per gallon on the official EPA numbers. Compared to the outgoing first-gen Volt (38 miles EV range, 98 MPGe, and 37 mpg) these are all impressive increases. The all-electric range boost of almost 40 percent is the biggest surprise, though. We knew the new Volt would get better numbers than the first-gen model, but when GM debuted the car in Detroit earlier this year, it said it suspected the Volt would get a 50-mile range, 41 mpg and 102 MPGe. We'll be keeping an eye out for official confirmation of all these new numbers. Volt drivers are already making most of their driving miles electric. The number sits at about 80 percent currently, and GM has said it expects this to climb to 90 percent in the new model. GM said in May that the 2016 Volt will start at $33,995, a bit lower than the current Volt's MSRP of $34,170 before any tax breaks. So, for less money you'll be getting much better fuel economy. What's not to like about that? Preorders are already open for interested buyers in some parts of the country. Related Video: Featured Gallery 2016 Chevy Volt View 16 Photos News Source: GM Authority, Autoguide Green Chevrolet Fuel Efficiency mpg ev range