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Ford updates Power Stroke diesel V8, strengthens F-450, tweaks King Ranch

Ford is giving its F-Series Super Duty trucks some upgrades for 2015, and we're happy to say that one of them is an improved Power Stroke diesel V8. Also, Ford is strengthening the top-of-the-line F-450 to handle more abuse. And if wild west-style luxury is your thing, the automaker has performed minor cosmetic updates to its King Ranch Edition trucks, as well.
The turbocharged 6.7-liter Power Stroke V8 is currently rated at 400 horsepower and 800 pound-feet of torque, and Ford only tells us the new and improved Power Stroke can "produce power beyond today's" engine. What, then, did Ford actually improve upon? First, the Blue Oval swapped in a new, larger turbocharger. The new Garrett GT37 turbine unit is 72.5 millimeters in diameter, eclipsing the old GT32's 64-mm diameter piece. Ford states output increases with the new turbo setup, but since the new turbocharger operates at a lower peak pressure than the old one, the automaker was able to eliminate the wastegate system and reduce the engine's complexity. Ford even redesigned the turbo's oil and cooling lines to make the powerplant simpler. A byproduct of the larger turbo is better engine exhaust braking, which is controlled manually by a button on the dashboard.
Ford claims the upgraded diesel engine is more powerful, more robust, more efficient and more refined than before.

Shelby GT500 and Roush Stage 3 go head to head at the drag strip

The Ford Mustang is a brilliantly affordable source of horsepower, with a base 300-plus-horsepower version available for well under $30,000. Jumping up to about $35,000 will get you a solid 420 horsepower from a high-revving V8, while those with some extra disposable income can get a pair of 600-plus-horsepower monsters. Both the Roush Stage 3 with its Phase 3 package and Ford's factory Shelby GT500 even crest the 650-horsepower mark, with 675 and 662 ponies, respectively.
Naturally, someone needed to find out which of these hi-po Mustangs was the quickest. And while this video is quite obviously a dealership commercial, at least there's some solid drag racing between two of the most powerful performance machines available for under $100,000.
With two NHRA drag racers at the wheel, the Stage 3 and GT500 go head to head for three races. Scroll down below to see the results in the full video.

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.