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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!"

Jeep Grand Cherokee, Dodge Durango still catching fire after recall

Automakers issue recalls all the time. It's part of the cost of doing business. We just assume that once the recall has been carried out, the problem in question has been fixed. But that's not always the case, as this latest investigation being undertaken by the National Highway Traffic Safety Administration goes to show. The problem stems back to a recall issued by Chrysler last summer. It revolved rather the sun visor in the SUVs it makes at its Jefferson North Assembly Plant – specifically, the screw affixing the sun visor could end up rubbing against the wiring for the lamp in the vanity mirror, potentially causing an electrical short and even a fire. 62 such short circuits, 38 fires and three injuries reported, prompting Chrysler to recall nearly 900,000 units of the 2011-2014 Jeep Grand Cherokee and Dodge Durango (over 650,000 of them in the United States). The plastic spacers they installed to rectify the problem, however, may not have done the trick. Eight reports (but none involving injuries) have been filed with the NHTSA regarding the same issue recurring, spurring the government agency to open a new investigation into the matter. If deemed necessary, the NHTSA could ask FCA to issue another recall to fix the issue again, which we may necessitate the installation of a fuze to prevent any such the electric short. Related Video: INVESTIGATION Subject : Headliner Fires Date Investigation Opened: MAY 01, 2015 Date Investigation Closed: Open NHTSA Action Number: RQ15003 Component(s): ELECTRICAL SYSTEM , INTERIOR LIGHTING Manufacturer: Chrysler (FCA US LLC) SUMMARY: On July 1st, 2014 Chrysler (FCA US LLC) issued safety recall 14V-391 to remedy a wiring-related fire hazard on the headliner of approximately 661,888 model year (MY) 2011-2014 Jeep Grand Cherokee and Dodge Durango vehicles manufactured between January 5, 2010 and December 11, 2013. The recall was in response to the Office of Defects Investigation (ODI) investigation EA14-001 during which data provided by Chrysler indicates that the fire is caused by an electrical short in the vanity lamp wiring for either one of the sun visors mounted on the vehicle. The sun visors are mounted to the roof of the vehicle through the headliner with three metal screws.

2015 Dodge Viper getting small increase in power

The Viper is used to being the most powerful car in the Dodge and SRT stables, but the arrival of the 2015 Dodge Challenger SRT Hellcat means that's no longer the case. The serpentine supercar is, however, reportedly getting a small boost in output for 2015, amounting to all of five horsepower.
The increase was uncovered by Road & Track courtesy of the SAE J1349 certification process to which Detroit's Big Three automakers submit themselves and which reports the Viper's output at 645 hp instead of the 640 it was rated at until now. There are a hundred factors that could have contributed to the relatively mild boost in output (best guess? nothing at all changed...), but we doubt anyone's going to complain about some extra horses under the hood.
The five-horsepower boost brings the Viper that much closer to the 650-hp Chevy Corvette Z06, not to mention the 707-hp Hellcat, but the Viper's impressive power-to-weight ratio ought to mean it'll have little problem keeping up in a straight line - which is just one of the reasons why Chrysler won't shoe-horn the Hellcat into the Viper: as R&T points out, the supercharged engine is too heavy and the blower makes it too tall to fit in the Viper's engine bay.