Next Tuesday (August 31) we plan to dyno our newfound ’11 F-350, scramble to a local Ford dealer and receive the 400hp/800 lb-ft calibration, and get right back on the dyno...

We’ll be keeping an eye on fuel economy too, as we’ve heard the high output version may sacrifice mileage some. Hopefully it will only be a minimal loss, but either way, we’ll report our findings as we get them.

So far, the 390hp version feels just like the other 2011’s we’ve tested: light on its feet, responsive, and is currently getting 18 mpg empty. We also found out that they’re governed to 97 mph from the factory  ☺