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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).

Is this '47 Chevrolet a rat rod or a sports car?

These days there are plenty of vehicles that blur the conventional automotive class structures. For instance, was the Honda Crosstour a wagon or an SUV? And what exactly was the Nissan Murano CrossCabriolet? Regardless, those line-blurring cars (or trucks) are out there, and though this one didn't roll off a production line, it's still quite the automotive head-scratcher. Hailing from Missouri, this epic creation is one part mad science experiment, one part 1947 Chevrolet pickup, and one part '95 Mercury Cougar. Add it all up and you get an awesome truck-sports-car hybrid, complete with an outrageous wing and a V8 to boot. And interestingly enough, it's up for sale . RELATED: Check out this Wild-Styled Lamborghini Rat Rod So how does it all come together? According to the listing, the Chevrolet truck cab (which had previously been chopped) was sanded down to bare metal and given a thorough shellacking of clear coat. It was then melded together with the front end of a 1995 Chevrolet S10 pickup truck, and set low to the ground on Bilstein suspension drop spindles. Stance achieved. But instead of fielding an engine from either of those pickups, it pulls its heart from a 2005 Chevrolet Tahoe SUV—a big 5.3-liter V8 heart, that is. It comes backed-up to a GM Turbo 400 automatic transmission. Towards the rear however is where things get really interesting. A Copper Pearl coated tube frame chassis both attaches the rear independent suspension (a la Mercury Cougar) to the racy spoiler, as well as secures the rat rod's rear-mounted radiator, fan, and fuel tank. I'm not quite sure why, but it just looks glorious. RELATED: Reports Say Mid-Engine Corvette Will Arrive in 2018 Inside the vintage cab, the Chevrolet furthers its racing proclivities (it's said to have won burnout and auto-cross events) with a pair of harnessed racing seats, a drift brake, a detachable steering wheel, and a tachometer with oil and temperature gauges, but oddly no speedometer. The shifter is a crescent wrench. And its shift boot? That's a Crown Royal Purple bag. All in all, this grin-worthy Frankenstein creation tallies up bits and pieces from four different vehicles (five if you include the Camaro wheels), which make it truly a mash-up of epic proportions. Internet, what do you think? Related Video: This article by Zach Doell originally appeared on Boldride. Design/Style Chevrolet Mercury Auctions Coupe Special and Limited Editions Classics eBay rat rod

Ranking full-size pickup trucks by the size of their discounts

Each and every month, full-size pickup trucks dominate the new-car sales reports in America. It's been that way for years — the Ford F-Series has been America's best-selling vehicle for 38 consecutive years — and it's not going to change any time soon. With that in mind, we've compiled this list of discounts on brand-new full-size pickup trucks using data provided by Truecar, including their average retail prices, average transaction prices and discounts in dollars and percentage off list price. We've also created a visualization of the best deals Americans are scoring on the three best-selling models in America. If you're looking for the absolute biggest discount you can find on a new truck, look no further than your nearest Ram dealership, then scour the lot for a leftover 2019 1500 model. Buyers are averaging nearly 13% off the cost of the 2019 Ram, paying an average transaction cost of $41,667. That's $6,071 off the average retail price, which equals the best truck deal in October. The 2020 edition isn't discounted nearly as far, averaging $2,852 off for an average transaction price of $48,904. The next best deal is on the 2019 Ford F-150; its average transaction price of $43,064 equals $3,843 off its sticker price. The 2020 F-150's $2,810 discount means buyers are paying around $47,300. They should know, though, that a brand-new model is coming for 2021, so we'd expect bigger discounts on remaining 2020 inventory in the coming months. Moving to General Motors, the best deal you'll find is on leftover 2019 Chevy Silverado 1500s, which are selling for an average of $47,043. That's $2,852 off the sticker price. Interestingly, 2020 Silverados are seeing slightly lower transaction prices at $46,009, but with a smaller average discount of $1,693. The 2020 GMC Sierra is mechanically similar to the Chevy, but aimed at buyers who want a bit more luxury. That's reflected in the 2020 Sierra 1500's average transaction price of $54,491, which is $2,131 off its sticker. If pickup trucks aren't your thing, take a look at this list of the best new car deals in America based on the percentage discount off their suggested asking prices here. And when you're ready to buy, click here for the Autoblog Smart Buy program, which brings you a hassle-free buying experience with over 9,000 Certified Dealers nationwide.