1971 Gmc Jimmy Base Sport Utility 2-door 4 Wheel Drive Hard Top Convertible on 2040-cars

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Roadkill pits every project car against each other

The guys behind Motor Trend's monthly Roadkill series have collected nine of their favorite project cars from their videos and pitted them against each other in a battle royale to determine a winner. It's 44 minutes long, but it's completely worth the investment of time.
The cars run the gamut from a 1973 Chevrolet Ramp Truck, a 1975 AMC Pacer and a legitimately impressive 1967 Chevy Camaro, and they are pitted against each other to see which is the fastest around an autocross course. The drivers include Roadkill's two hosts and Motor Trend's Johnny Lieberman and Carlos Lago. It's reminiscent of the best episodes of Top Gear and worth a watch.
So it's the weekend - the perfect time to relax. Grab your preferred beverage, get comfortable and enjoy 44 minutes of some seriously ratty but utterly cool project cars as they are throttled within an inch of their lives (or past it). Scroll down to check out the video.

GMC Hummer EV SUV to be fully revealed during Final Four in April

GMC is going to use another large platform to reveal the next chapter in its Hummer story. The GMC Hummer EV SUV will officially be revealed on Saturday, April 3, at 5 p.m. ET during the Final Four. That’s the SUV, not the truck, which has already been revealed. YouÂ’ll be allowed to place a reservation for the SUV at the same time as itÂ’s unveiled during the basketball games. There are no further details about the SUV, but weÂ’ll point out that a decent preview of what the SUV will look like is already out and can be seen here. ItÂ’s going to look a whole lot like the pickup, but will of course be fully boxed in, as an SUV is. WeÂ’ll know more about what GMC has in store in just under a monthÂ’s time.  In addition to the news about the impending SUV, GMC released video footage of the pickup version undergoing winter testing in MichiganÂ’s snowy Upper Peninsula. You can see the video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. GM says that itÂ’s using this region to dial in and calibrate the truckÂ’s all-wheel-drive torque distribution, traction control system and stability control. Testing is conducted on snow, ice, and steep and split-friction grades. ThatÂ’s all GM is letting us in on for now, but at least we have the second version of the electric Hummer in our scopes now and will be eagerly anticipating its reveal. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

'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).