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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!"

Dodge Challenger Shakedown: '71 body, new guts

While Jeep has created a number of vintage-bodied custom vehicles with modern components, this year's SEMA show plays host to Dodge's take on the idea. The Shakedown concept began life as a 1971 Challenger and ditched almost everything in it, including the engine and chassis. What's left is a modern car with a retro look. The chassis was a particularly complicated part of the job, since the Challenger was originally a unibody car. However, Dodge chose to separate the Challenger's iconic body from its structural parts, and moved it onto a custom, one-off chassis from which the body can be removed as needed. The chassis also carries lowered suspension, Challenger Hellcat brakes, and a 6.4-liter 392 Hemi V8 connected to a six-speed manual transmission from the Viper. Dodge also installed the engine using the new Hemi engine swap kit from Mopar. With the shaker cold-air intake and custom exhaust, the Shakedown's powerplant makes 485 horsepower. View 13 Photos The body itself received plenty of tweaking as well. Dodge shaved off the drip rails, door handles, and turn signals for a cleaner look, and also fitted the grille, headlights, and taillights from a 2017 Challenger. The whole thing is finished in matte black paint with a "vibrating" stripe offset on the left side. The Shakedown also gets 20-inch Slingshot rear wheels and a pair of custom 19-inch versions for the front. On each fender is a bright red "392" decal that uses the same font as the labels on classic Mopars 360 cubic-inch V8s. Inside, the Shakedown gets the same radical upgrade as the chassis. Two Viper seats accompany a Viper steering wheel, and the rear seats are gone altogether. The Viper gearbox is shifted with a Challenger Hellcat gear knob, and carbon-fiber accents and leather adorn the wheel, door panels, instrument panel and center console. Related Video: Image Credit: FCA, Joel Stocksdale SEMA Show Dodge Coupe Concept Cars Performance

Will airbags sandbag the 2017 Dodge Viper?

The Dodge Viper is speeding down the road to cancellation for the 2017 model year, and at least part of the reason for the V10 monster's death is a problem fitting it with federally mandated side curtain airbags. An anonymous source close to FCA US told Motor Trend the automaker can't install the parts because they would further limit the coupe's already tight headroom. The government believes the side curtain airbags can reduce occupant ejections during accidents, and all vehicles must have them for the 2017 model year. The Viper's slow sales also don't provide FCA US much motivation to work out a solution to this problem. The automaker moved just 676 of the handmade sports coupes in the US in 2015, which was down 11 percent from 760 deliveries in 2014. FCA CEO Sergio Marchionne hinted at the Detroit Auto Show that the Viper could return eventually. He doesn't like that the current model has a dedicated platform but indicated a new one could share the underpinnings with another of the company's products. Marchionne's current business plan for FCA stresses building the automaker's value, so it might be a while before we see the sweater-clad CEO focusing on a niche vehicle like the Viper. Related Video: