Secret #1: Ford engineered its own powertrain for the 2015 Super Duty®
Secret #2: The 6.7-liter Power Stroke® V8 makes more horsepower and torque than the previous model
Secret #3: First rule of the Power Stroke? There are no secrets
The design of the 6.7-liter Power Stroke V8™ is something you would think would be cloaked in darkness, even within the walls of the Blue Oval. ™ Not so – Ford is proud of what it accomplished with the second-generation diesel model optional in the 2015 Super Duty, and admitted building an efficient engine* required a lot of openness. “Keeping everything in-house gives a competitive advantage because there are no go-betweens,” explained David Ives, Ford Power Stroke Technical Specialist. “The engine guy can just walk over to the transmission guy and they can work together to find the best solutions, breaking down barriers.”
The upgrades to the Power Stroke resulted in 440 horsepower – the previous 6.7-liter Power Stroke made 400 – and 860 lb.-ft. of torque – up from 800. This pertains to all Super Duty models, from F-250 to F-450. That’s what happens when you engineer a work truck to be a work truck, and as a team. Ford is the only manufacturer that develops and builds its own powertrains in this class. And there are innovations galore: a compacted graphite iron engine block and reverse-flow layout. About that no-secret rule? “Strong communication built a better diesel truck,” David added.
“The designers of the original 6.7-liter Power Stroke V8 Turbo Diesel predicted that it would eventually need to be upgraded for higher output,” said David. “They designed it in a way that made it easier to add a larger turbocharger, increasing airflow and creating more power for dramatically improved performance, yet we haven’t lost any efficiency.”
So, looks like the cat is out of the bag: This purpose-built truck has been improved from (cylinder) head to tow.
*Based on Ford simulated city-suburban drive-cycle tests of comparably equipped 2015 Ford and 2011-2013 competitive models, consistent with SAE Standard J1321.
