2002 Ford F-150 5.4l Supercharged Boss on 2040-cars

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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.

2015 Ford Mustang spied on video for the first time

Not many cars will continue to hold our rapt attention quite like the upcoming redesigned 2015 Ford Mustang, codenamed S550 internally. Earlier this month, we brought you the first spy photos of a next-gen Mustang prototype out testing, and even though expertly placed cladding concealed the pony car's new shape, we could tell that underneath was hiding an altogether new form inspired by the Evos Concept from 2011.
Today we give you some video of what looks to be the same Mustang prototype, which you can watch below, and while the budding director behind the camera wasn't able to capture much in the way of the engine's audio signature, we can see the car in motion for the first time and compare its relative size and shape to the S197 Mustang GT that's on its tail.

Hennessey Ford GT sets 267.6-MPH record at Texas Mile [w/videos]

The record-setting Hennessey-powered camouflage Ford GT we showed you at this time last year headed back to the Texas Mile and managed to bring home yet another record. As you may recollect, last year saw Mark Heidraker's machine sprint to a record 257.7 mph thanks to propulsion from its twin-turbo 5.7-liter V8. The big mill sucks down race gas, and this year the creation pulled off a 267.6-mph run over the weekend. That feat set a new record for the event. Something tells us neither Heidraker nor Hennessey are done squeezing more thrust from this machine.
This particular Ford GT has already gone through a number of permutations. Hennessey started by tweaking the factory supercharger set up before abandoning the blower in favor of two turbos. Since then, the crew has poked and prodded it to coerce as much grunt as possible out of the car. We expect Hennessey will probably come out with a video of the record-setting run shortly, but in the meantime, you can see a couple of videos of the car's runs in Texas below (one of which actually captures the record run). Enjoy.