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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!"

Callaway debuts its new C7 Stingray at National Corvette Museum

Callaway showed off its first tuned version of the 2014 Corvette Stingray at the National Corvette Museum last week, giving the rampant enthusiasts of America's sports car a look at the roughly 620-horsepower, supercharged rocket.
Unlike the Corvette SC610 we showed you back in January, this Stingray packs a fair bit more oomph. Horsepower is only up ten ponies, but torque has jumped from 556 pound-feet to "at least" 600 pound-feet. Neither horsepower nor torque is official quite yet, although Callaway is expecting to know just what its creation can do once testing and validation is completed later this month.
The 6.2-liter, supercharged V8 now boasts a new, three-element intercooler, which Callaway claims only allowed the inlet air temperature to increase by ten degrees Fahrenheit during dyno runs. Previous designs saw a 35-degree-Fahrenheit jump. The exhaust system has also been fettled with, and now is even less restrictive.

2014 Chevy Silverado, GMC Sierra full configurators truck in

You can now put prices to your wildest option-sheet dreams of the 2014 Chevrolet Silverado and GMC Sierra. A microsite for the full-size pickup truck twins has been up since January, and now the full-blown configurator is live and ready to take your virtual orders. The only two chassis configurations available at the moment are the Crew Cab with either a short or standard bed - Regular and Double Cab versions will come later. In Silverado flavors that will run you $32,710 for the short box, $33,010 for the standard box, while the Sierra adds a $1,500 premium to both of those prices, and destination and handling for both models adds another $995.
Since these are American pickups the list of modifications is lengthy, but we added $11,450 in just two steps by starting with the Silverado Crew Cab and standard bed, then checking four-wheel drive and the LTZ Z71 package. Our final truck, resplendent in Brownstone Metallic paint, heated and cooled Cocoa/Dune perforated leather seating and tasty details like chrome recovery hooks, and engine block heater and LED cargo box lighting, rang up $57,285 at the candy store.
They'll be on dealer lots sometime this summer, so now's a good time to start practicing your box-checking.