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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.

Autoline streaming live from Detroit Auto Show right now

As you can already see, the Autoblog team is digging deep to bring you everything from the Detroit Auto Show media days today and tomorrow, with obsessive coverage of all of the new sheetmetal, hot concepts and industry news. But we're hardly alone in Cobo Hall, and our friend John McElroy and his Autoline team have fired up a live video webcast with interviews from the show floor that you can watch right now by scrolling below. The daily streaming broadcasts start at 1:00 PM Eastern today and tomorrow, with a large number of A-list executives, designers, and product planners from both domestic and foreign automakers are expected to sit in. Interviewees scheduled to appear include Al Gardner, President and CEO of Chrysler; David Zuchowski, brand-new President and CEO of Hyundai Motor America; Doug Scott, Truck Group Marketing Manager at Ford; and Peter Schreyer, President and Chief Design Officer at Kia. For the live feed and a full list of guests for both days, scroll below. Live broadcast by Ustream [Pop-out Chat Window] Day One Al Gardner, President and CEO, Chrysler Brand Ludwig Willisch, President and CEO, BMW of North America Doug Scott, Truck Group Marketing Manager, Ford Tim Mahoney, Chief Marketing Officer, Global Chevrolet Heiko Schmidt, Head of C-Class Product Planning, Mercedes-Benz USA Filip Brabec, Product Planning Manager, Audi of America Day Two Bob Ferguson, Senior Vice President, Global Cadillac Dave Zuchowski, President and CEO, Hyundai Motor America Mike Manley, President & CEO, Jeep Brand Peter Schreyer, President and Chief Design Officer, Kia Tom Kearns, Chief Designer, Kia Design Center America Jim Lentz, COO, Toyota Motor NA Tony Nicolosi, President & CEO, Volvo Cars North America Jose Munoz, Executive VP & Chairman, Nissan Americas Auto News Detroit Auto Show Audi BMW Chrysler Ford Kia Videos Detroit Autoblog 2014 Detroit Auto Show autoline Peter Schreyer

Which is more fuel efficient, driving with a pickup's tailgate up or down?

Thanks to the smoke wand in the wind tunnel, you can actually see the difference in our video.
Should you drive with your pickup truck's tailgate up or down? It's an age-old controversy that's divided drivers for decades. Traditionalists will swear you should leave the tailgate down. Makes sense, right? It would seem to let the air flow more cleanly over the body and through the bed. But there's also a school of thought that argues trucks are designed to look and operate in a specific manner, and modern design techniques can help channel the airflow properly. So don't mess with all of that: Leave the tailgate up.