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Super Duty's Power Stroke diesel gets 800 lb-ft of torque reflash

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Super Duty's Power Stroke diesel gets 800 lb-ft of torque reflash

by Chris Shunk (RSS feed) on Sep 10th 2010 at 10:58AM

We don't remember feeling at all disappointed when Ford released power figures for its new 6.7-liter Power Stroke diesel engine available in the 2011 Super Duty. After all, who's going to argue with 390 horsepower and 735 pound-feet of torque? Then General Motors published power figures for its new 6.6-liter Duramax Diesel of 397 ponies and 765 stump-pulling lb-ft of twist. Oh snap! That left Ford on the shallow end of the power pool, but engineers were secretly working on a flash update for its in-house oil burner. The engineering tweak is now available and brings the Power Stroke's figures up to 400 horsepower and 800 lb-ft of torque, besting the General's mill by three ponies and 35 pound-feet.

Our friend Mike Levine over at Pickuptrucks.com dyno'd the engine before and after the reflash. The new Power Stroke has a lot more low-end torque than it did before the reflash, with an extra 45 lb-ft available at the rear wheels at a measly 2,000 rpm. But as the power band stretches towards 4,000 revolutions, the torque totals swing back into the favor of the pre-calibration engine by 22.1 lb-ft. Is that a big deal? Probably not to truck drivers, as low-end torque is the name of the game when you're pulling and hauling for a living.

Beyond added capability, Levine tells us that the reflashed Super Duty feels less jumpy, adding "gear shifts were smoother and less noticeable after the update than before getting on the freeway and driving on surface streets." New 2011 models heading down the assembly line will receive the updated mill, but existing customers can get a free reflash from their dealer. For the next 12 months, some early purchasers of the 2011 Power Stroke will also have to visit a dealer for the upgrade. The whole process reportedly takes all of 30 minutes, or enough time to think about what else you can tow with your newfound torque. Head over to pickuptrucks.com to read the extensive review of the new engine calibrations.



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