1969 Superbee A12 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!"

Chop the top of your new Dodge Viper for $35,000

We have good news, and we have bad news. First, the good: It's now possible to get a brand-new Dodge Viper roadster, which is nice, considering we're in the dead of summer and many of us like wind-in-the-hair motoring. Now, the bad: This is not a factory option from the automaker, instead coming courtesy of an aftermarket company called Prefix Performance, and that means it's going to cost you some serious coin.
Called Medusa, this drop-top Viper was created without the knowledge or consent of Dodge, but that's probably fine because Prefix works with the automaker already for the final preparation of the American supercar, including paint. According to the company, the current, fifth-gen Viper was built with a convertible version in mind, so no chassis strengthening is required. From the looks of the somewhat grainy photos available, the conversion appears of very high quality.
Want one? Well, that means you're going to need to procure a Viper - Prefix has 10 units ready for transformation as it stands - and that's going to cost at the very least $102,485. Then, you'll need to write a check for an additional $35,000 for Prefix to surgically remove the car's roof. Thing is, for that kind of cash, a prospective owner could buy, among other very nice options, a Viper hardtop and a loaded Miata, or a Corvette Stingray convertible and several pockets full of change. Or, perhaps a new Viper hardtop and a used, first-gen Viper convertible?

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.