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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!"

2015 Chevy Tahoe gets Police Patrol Vehicle treatment

That was fast. Mere days after showing a Police Concept based on the 2015 Tahoe at the SEMA Show, Chevrolet has announced that it will build a PPV model based on the SUV to do battle with the Ford Police Interceptor Utility (Explorer) and Dodge Durango Special Service.
You'll recall that the Tahoe has been police staple for several years, predating both the Explorer and Durango police variants, so the fact that the new model would spawn a police variant is hardly surprising. Like the civilian model, the 2015 PPV benefits from a more efficient 5.3-liter, direct-injection V8 that pumps out 355 horsepower and 383 pound-feet of torque. It also features more high-strength steel, offering better crash protection, on top of optional safety items like lane departure warning, forward collision alert and a Safety Alert Seat.
The press release is rather light on police-specific items, aside from the auxiliary battery, which keeps the myriad of electronics in a modern police car running even when the engine isn't. Lightbars, 17-inch steel wheels on Goodyear Eagle RS-A tires and a push bar round out the mods for the Tahoe PPV. The cabin features a revised center console and room for laptop and other equipment mounts.

What we know, and think we know, about the 2016 Chevy Volt

With the next-gen Chevy Volt due to make an appearance at the Detroit Auto Show early next year, bits and pieces about the new car are making their way into the press. Perhaps most importantly, the new Volt is going to have better "fuel economy and efficiency," according to GM executive vice president Mark Reuss. The current Volt gets 98 MPGe and 37 miles per gallon on premium fuel. It also has a 38-mile electric-only range. We don't know how GM will improve the efficiency or to what degree, but the logical options include making the car lighter, giving it better aerodynamics and/or improving the powertrain. To that end, one of the big things we don't know for sure includes information on the new gas-powered engine. Forbes says it will be a downsized 1.0-liter, three-cylinder mill instead of the 1.4-liter, four-cylinder used in the current model, which could certainly help the car be more efficient. The new Volt is also going to have more technology, which shouldn't surprise anyone. GM is now openly talking about how it will change the way it markets the Volt, shifting away from the mass-market mentality to focus on the regions where the car is already popular. "There's a Northeast and West Coast market for Volt, and there's nothing wrong with that," Chevy chief marketing officer Tim Mahoney told Forbes. There are rumors that the new Volt will have seating for five by adding a seat in the back. This is something a lot of current Volt owners would love, but we've heard nothing official hinting that this would be the case. We expect the battery to be the new 17.1-kWh version, or maybe even have a capacity increase, so GM would have to seriously repackage the pack to eliminate the ridge that runs from between the front seats and then back to the rear two seats. If you've heard anything official, do let us know.