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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.

How Ford secretly used customers to test its aluminum F-150 [w/video]

Automakers getting clever about disguising development vehicles isn't anything new. Between mules wearing the sheetmetal of other cars and prototypes decked out in as much camouflage as is practical, automakers know how to make it very difficult for the general public to get an exact idea of what kind of vehicle is in development. Ford, though, is rapidly becoming the master.
We knew that the Blue Oval originally tested the durability of the aluminum construction being used for the 2015 F-150 by building an all-aluminum 2014 truck and entering it in the Baja 1000 off-road race. That's no longer a secret. What we didn't know, though, is that the aluminum development dates back to before even that, and that some of the people in question had no idea what it was they were working with.
Ford says this is the first time prototypes have ever been handed over to the public.

Submit your questions for Autoblog Podcast #310 LIVE!

We record Autoblog Podcast #310 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
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