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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).

Porsche 911 tops a list of must-have classics, but No. 2 is more of a surprise

No surprise here: In Europe, the Porsche 911 is the most sought-after classic car. Surprise here: Slip-streaming the 911 in the most sought-after chart compiled by the Car & Classic marketplace is the Ford Mustang. Using the Google search engine as a means to pick the winners, as well as the average prices achieved on the “Car and Classic” website, the venerable 911 was tagged 1.45 million times per month according to data stretching back 15 years. The number of 911Â’s sold though the C&C marketplace was 21,141, at an average price of 58,409 pounds, or $74,300. FordÂ’s pony car, still a popular choice for buyers in Europe, placed second on the list with 1.2 million monthly searches. The average sales price over 15 years was 31,107 pounds ($39,570), and the number of older Mustangs sold reached a total of 8,332. Models that also finished among the charted top 10 include the Land Rover Range Rover, the Corvette, the ultra-classic British favorite Jaguar E-Type and the BMW 3 Series. “Whilst a 1973 Porsche 911 Carrera 2.7 RS could set you back the best part of GBP500,000 ($636,000), there are many more affordable models, which bring the average sale price of a 911 on Car & Classic to GBP58,000 ($73,800) – the third highest average selling price of any make and model on the site,” explained Dale Vinten of Car & Classic. According to the site, the Jaguar fetched the highest average selling price: a whopping 89,000 pounds, or $113,000. But thatÂ’s peanuts compared to a Series 1 Roadster in excellent condition, said Vinten. For that, “you can expect to spend up to GBP250,000 ($318,000), A Series 2 or 3 will cost less, as they are not as desirable, but in decent condition you can expect to pay around GBP40,000-GBP50,000. Even a barn find 1969 E-Type Series 2 Roadster can set you back to the tune of GBP33,000 ($42,000)." Launched in 2005, Car & Classic is among EuropeÂ’s most popular classic car clearinghouses. It also runs a stand-alone auction site.

GM announces $7 billion Michigan factory investment, most going to EVs

GM announced a $7 billion investment in Michigan manufacturing, much of which is earmarked for EV production. Four sites are included, but the key elements are a new battery cell plant in Lansing and the conversion of GM's existing Orion Township facility to expand production of the forthcoming Chevrolet Silverado EV and its GMC Sierra sibling.  GM says it is the largest investment announcement in company history and that it will create 4,000 new jobs. It also says 1,000 jobs will be retained. "We are building on the positive consumer response and reservations for our recent EV launches and debuts, including the GMC Hummer EV, Cadillac Lyriq, Chevrolet Equinox EV and Chevrolet Silverado EV," said GM CEO Mary Barra.  GM says the Orion expansion and new battery plant will support an increase in full-size electric truck production capacity to 600,000 units. This is in addition to the Factory ZERO facility in Detroit that will also be constructing the electric Silverado and Sierra.  The Orion Township factory current builds the Chevrolet Bolt EV and EUV, and will continue to do so during the plant's conversion. GM did not indicate what will happen with the Bolts once that conversion is complete or whether all will continue to be built at Orion. They do not use the Ultium vehicle architecture. GM will build other EV models at three other factories that are under construction or being converted. They are located in Spring Hill, Tennessee, Ingersoll, Ontario, and Ramos Arizpe, Mexico. GM says that it will have the ability to produce 1 million electric vehicles by 2025. The Ultium Cells Lansing facility is a $2.6 billion joint investment by GM and LG Energy Solution. GM says it alone will create 1,700 jobs once fully operational by late 2024. It will join two other GM Ultium Cells battery factories currently under construction in the United States, one in Ohio and the other in Tennessee.  Not all of the $7 billion investment will be for EVs. It also announced $510 million of the total will go toward upgrading the Lansing Delta Township Assembly to produce the next-generation Chevrolet Traverse and Buick Enclave. Money will also go to upgrading Lansing Grand River Assembly.