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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).

The cars and trucks of 'Transformers: Rise of the Beasts'

The latest spectacle in the Transformers franchise is about to hit the theaters. The final trailer was released, giving us peeks at what appears to be a pretty boilerplate story about the end of the world. There's some kind of ancient interplanetary war brewing and it's up to some teenagers to sort it out with the help of their robot buddies. But this is Autoblog, so we're not even going to try to suss out a plot so thin it won't hold a spittle globule's worth of water. We'll just go over the cars. Transformers: Rise of the Beasts | Official Final Trailer (2023 Movie) Porsche 911 Carrera RS 3.8: Mirage So far the star of the film, car-wise, looks to be a blue-on-silver 964 Porsche named Mirage that is voiced by Pete Davidson. It's been the most promoted of the movie cars, even more so than formerly central characters like Bumblebee and Optimus Prime. Except, this isn't just any ordinary 911; it's a Carrera RS 3.8, a European-exclusive model of which Porsche only built 55 units. As the name implies, it came with a bored-out M64 turbo flat-six as opposed to the 964 Turbo's 3.6. It wore the Turbo's wide-body badonk with a bi-level rear wing, but Porsche reportedly stripped out 570 pounds' worth of weight despite embiggening key performance parts like brakes and wheels. Fortunately, no actual RS 3.8s were used in the movie. Producers instead built five cars for different purposes — shooting closeups of actors, jumps, the obligatory driving backwards real fast — out of lesser 911s. However, the sound department did record the engine note of an actual RS 3.8 for accuracy, as the higher crank speeds of the 3.8 have a distinctive sound.  In the original 1984 Transformers lineup Mirage was a Ligier JS11 Formula 1 car, complete with faux Gitanes cigarette branding (on a children's toy!). An F1 racer would raise an eyebrow on the streets, so it made sense to update to a street-legal sports car. If you're wondering why this Porsche isn't the character Jazz, whose original vehicle mode was an ultra-cool Martini-liveried Porsche 935, well, he was remade into a Pontiac Solstice voiced by Darius McCrary during the GM product placement rewrite in 2007's Transformers reboot, then unceremoniously killed. 1977 Chevrolet Camaro: Bumblebee Formerly the franchise star, Bumblebee gets far less screen time in the trailers. He's still a Camaro, but because Transformers: Rise of the Beasts takes place in 1994 he's not a fith-gen.

2019 Toyota Avalon vs. full-size sedans: How they compare on paper

Full-size sedans aren't exactly in great demand at the moment, and at least one of the vehicles in this comparison has been rumored to be on the endangered species list. Yet, we've just had our first drive in the 2019 Toyota Avalon, and if anything has a chance of rejuvenating the segment a bit, it's an all-new version of what has long been the segment's benchmark. To see how the new Avalon compares, we've put together the below spreadsheet featuring the Avalon's primary apples-to-apples rivals, the Buick LaCrosse and Chevy Impala. We also included the Nissan Maxima, which is comparable in price, sales and non-luxury badge, and which offers the sort of increased driver engagement promised by the new Avalon XSE and Touring trim levels. We also included the outgoing Avalon for reference as well as that car's luxury cousin, the Lexus ES, which can definitely be cross-shopped with the luxuriously trimmed Avalon Limited. You can use our Compare Cars tool to create your own comparison, such as one featuring the rear-wheel-drive Chrysler 300, Dodge Charger or even Kia Stinger. Alright, enough chit chat. On to the spreadsheet. Performance and fuel economy The GM sedans may come standard with four cylinders, including a mild hybrid system in the LaCrosse, but puh-lease. The V6 is the name of the game in this segment, with outputs now surpassing the 300-horsepower mark. The LaCrosse is the horsepower and torque champ, though it also weighs a bit more than the new 2019 Avalon, so acceleration is likely to be comparable. The Impala weighs a lot more and has only a six-speed automatic, so despite having a wee bit more power, one should expect it to be pokier (not a good sign for a car rumored to be on the chopping block). One would expect the Maxima's 300 hp and lowest curb weight to result in the quickest acceleration, but then it's also strapped to a CVT, which despite being better than ever, is still a CVT. Things get worse for Chevy when you consider the Impala's base four-cylinder gets the same 25 mpg combined as the Avalon's V6 — once again a segment best. Now, should you really prioritize fuel economy, the 2019 Toyota Avalon Hybrid really stands out with a 43 mpg rating (or 44 with the base XLE trim) that bests the outgoing Avalon Hybrid. Honestly, after driving this new Hybrid, it actually seems like it would be the best bet for most buyers. There's sufficient power, and it only costs $1,000 more than the comparable V6 version.