'11 Power Stroke Key Features: 6.7L compacted graphite iron block and aluminum heads Garrett VGT turbo (twin compressor wheels) Bosch piezo CP4 pump-based common-rail injection B20 Biodiesel compatible Air-to-water intercooler All-new engine that shares nothing with outgoing 6.4L Power Stroke '11 Duramax LML Key Features: 6.6L iron block and aluminum heads Garrett VGT turbo (single compressor wheel) Bosch piezo CP4 pump-based common-rail injection B20 Biodiesel compatible Ninth injector used for DPF regeneration Higher-flow oil pump than '10 LMM engine If you aren't old enough to have lived through the muscle car era of the '60s-fear not. You can stop dreaming about the good old days right now. The Torinos, Chevelles, and Road Runners of that bygone era have nothing on the modern-day muscle offered by the diesel pickups coming out of Detroit. You are, in fact, living in the good old days of horsepower and torque-right now. In last month's issue we tested all six '11 diesel trucks ("2011 Pickup Truck Shootout") and showed how GM's new LML 6.6L Duramax engine laid waste to the 6.7L Cummins and 6.7L Power Stroke diesels during our performance testing. The Duramax's advantage (47 hp and 115 lb-ft more than Ram, and 7 hp and 30 lb-ft more than Ford) didn't sound huge going into the test-especially compared to the power numbers diesel enthusiasts are used to-but in practice, the '11 GM trucks felt like they were in a different category altogether. Now that Ford's packing its own in-house-built diesel engine, it isn't about to forfeit the horsepower war. So, to counter GM's attack, Ford has announced it's now uploading Super Dutys with a new calibration that will raise the 6.7L's power output to 400 hp and 800 lb-ft of torque. The new power increase requires no changes to the engine hardware but instead relies on "stretching of the fuel map," according to Chief Engineer of Powertrain Integration Adam Gryglack. Gryglack also reports that the new calibration does not affect urea fluid consumption and only increases the engine's exhaust gas temperature and cylinder pressure slightly. In fact, he said Ford proved this higher output calibration in the new engine's initial development. That leaves us with only two questions: Is 3 hp and 35 lb-ft of torque enough to make the Super Duty quicker than the Silverado? And, Chrysler, are you paying attention? When will you launch your Cummins counteroffensive? Ford has announced it will offer the '11 6.7L Power Stroke engine with a new engine calibration good for 400 hp and 800 lb-ft of torque. That bests the new LML 6.6L Duramax by 3 hp and 35 lb-ft. Super Duty Chief Engineer, Chris Brewer, reports the new engine tuning will also improve fuel economy up to 2 percent because the transmission will now be able to stay in higher gears, more often. Did you already buy an '11 Super Duty? Ford will offer existing customers the opportunity to get the new calibration free of charge. The new high-output tune will be available via a 30-minute upload to the ECU from your local Ford dealer until August 31, 2011. Ford has announced it will offer the '11 6.7L Power Stroke engine with a new engine calibr Best-in-class power was a short-lived title for GM's '11 Duramax-equipped trucks. The good news is the LML Duramax does enjoy the advantage of having a 10-year track record. It will be interesting to see if GM's marketing team chooses to play up the "we have a proven engine," position, or if it will take on Ford's power numbers and up the ante. Best-in-class power was a short-lived title for GM's '11 Duramax-equipped trucks. The good SOURCES Ford (Power Stroke) 800-392-3673 www.powerstrokediesel.com GM (Duramax) 800-263-3777 www.dmaxengines.com By David Kennedy Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!