Gmc Yukon Denali on 2040-cars

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Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

2018 GMC Terrain Drivers' Notes Review | Summon the Druids, it's a better Equinox

We've had plenty of time in the all-new Chevrolet Equinox, testing it with all three of its available turbocharged four-cylinders: the 1.5-liter, the 2.0-liter performance upgrade and the diesel fuel economy upgrade. Finally, however, we get a turn behind the wheel of its brother from a different corporate mother: the 2018 GMC Terrain. This duo is certainly one of the most disparate pairings in GM's long badge-engineering past, with virtually no visual similarities inside and out. They're even less similar than the last Equinox-Terrain, which themselves were a far-cry from the Blazer-Jimmy days. They're largely the same under the skin, however, including their selection of engines. For the 2018 Terrain, we sampled the 1.6-liter four-cylinder turbodiesel good for 137 horsepower and 240 pound-feet of torque. It's an unusual powertrain to be sure, as no other compact crossover SUV in this country offers one (though Mazda has been threatening to do so for years now), but boasts an EPA-estimated fuel economy rating of 28 mpg city, 39 mpg highway and 32 mpg combined with front-wheel drive. It's basically the same with all-wheel drive. The as-tested price of the SLT Diesel was a rather hefty $39,605. It did, however, have most options, including the Infotainment Package II and Driver Alert Package II that together include all the extra entertainment and safety gadgets. Contributing Editor James Riswick: Let's be honest, the main difference between the 2018 GMC Terrain and its Equinox sibling is the way they look. As such, I can definitively say I prefer the Terrain. It's far more cohesive and better proportioned than the rather dumpy Equinox. It also avoids the garish over-adornment of the last Terrain even if the floating roofline D pillar has passed its expiry date. I think the interior looks better too. As for the way it drives, the 2018 Terrain demonstrates great improvements from one generation to the next. The steering in particular is greatly superior in its feel and feedback. Body motions are also kept nicely in check. Is it a Mazda CX-5 or Ford Escape beater? No, but it's far more confidence inspiring now. So that's the good. Now, the extremely bad. This diesel engine vibrates so much I can't imagine anyone taking one for a test drive and choosing it over the 1.5-liter gasoline turbo. You feel it through the wheel, the pedals and the seat of your pants constantly. It's particularly bad when stopped and even present when just cruising on the highway.

Supercharged 2015 GMC Yukon Denali sounds evil, runs 0-60 in 4.5 seconds

Speeding along in a sports car is undoubtedly a ton of fun, but some owners need the ability to carry a lot of people and their stuff and don't want to sacrifice the ability to put the power down. The tuners over at Hennessey have that demographic covered with their growling, supercharged power kits for the GMC Yukon Denali. The upgrades come in three forms for the SUV's 6.2-liter V8: HPE550 with 557 horsepower, HPE600 with 605 hp and HPE650 with 665 hp. This video showcases the full-bore version, and this Denali can definitely hustle in a straight line. The power bump comes courtesy of a 2.9-liter supercharger, intercooler and high-flow cylinder heads to add over 200 horsepower compared to stock, and the final result is a bellowing SUV that rears up off he line to throw the driver back into the seat. The sprint to 60 miles per hour lasts just 4.5 seconds. Check out this hasty hauler in action in the video above.