1923 T-bucket 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!"

NHTSA opens investigation into Ford Explorer PI brakes

This year more than most, it's pleasant when we can string together a few days without word of an automaker or the National Highway Traffic Safety Administration announcing a bunch of new recalls. It's seemingly been a little quiet on this front lately (barring a spider-related Suzuki issue revealed early today), but now we have word of the government safety agency opening a Preliminary Evaluation into the 2013 Ford Explorer Police Interceptor, a probe that could potentially affect an estimated 20,000 vehicles.
The issue being investigated concerns failures of the front brake hose on the vehicle that show "small splits in the hoses near the body side ferrule of the hose assembly," according to the agency, and the issue could result in longer stopping distances. The feds have reports of 13 malfunctions affecting 11 Explorer units. However, it's important to note that all of the incidents come from a single, unnamed metropolitan police fleet that operates 46 of them. According to The Detroit News, the failures generally took place between December and July.
NHTSA is investigating further to find if this is a more widespread issue than just this one fleet. Ford spokesperson Kelli Felker confirmed to us, "We are cooperating with NHTSA on this investigation, as we always do." Scroll down to read the agency's report.

2013 Shelby GT350

Shelby is a name as synonymous with the Ford Mustang as marshmallows are with campfires. But unlike the short-lived sugary confection that is prepared on a stick, the late Carroll Shelby's name on the placard means added performance and exclusivity. Launched in 1965, the automaker's celebrated early cars were in production for a limited run - today, a mint concours-quality 1965 Shelby GT350 can sell for upwards of $350,000.
To coincide with the 45th anniversary of the original Shelby GT350, Shelby American reintroduced the GT350 in 2011. Like the original, it was only offered in white with blue stripes. Customers were offered a choice between naturally aspirated (440 horsepower) and two levels of supercharging (525 horsepower with a warranty or 624 horsepower without). The manufacturer calls the GT350 a "post-title" package, a term that means it starts out life as a stock Mustang and is modified outside Ford's factory (this is in contrast to the Shelby GT500, which is a standard Ford production car).
As the GT350 enters its third year, Shelby has made several changes. Mechanically, Wilwood brakes replace Baer units and Recaro seats and a tinted glass roof are on the options list. Cosmetically, the vehicle is now offered in most of the Blue Oval's factory colors, new multispoke wheels are available in Satin Black or Bright Silver Metallic finish, and customers can choose between Satin Black, Silver or Gloss White stripes (or Azure Blue Metallic on Performance White or Ingot Silver). Aesthetically, the look of the car has also changed somewhat - keen eyes will note that it actually appears more 'stock' than it did last year.