The horsepower and torque tug-of-war between heavy-duty truck manufacturers rages on with an intensity that could fuel a solid season of reality television. As soon as Ford teased their introduction of the 2015 F-Series Super Duty lineup at the State Fair of Texas, we figured they’d do something to catapult themselves ahead of the game. Although we don’t know all the details, we do know that what Ford has in store for their 2015 lineup will probably put a smile on your face.

We initially read of “engineering improvements [that] boost the performance, capability and durability” of Ford’s 6.7L Power Stroke V8 turbo diesel engine. The biggest detail surrounding this ambiguity is that the second-generation Scorpion 6.7L Power Stroke will receive a larger Garrett GT37 turbocharger, which will replace the Garrett GT32 single sequential turbo (SST), a variable geometry unit which featured twin compressor wheels mounted on a single turbine shaft. The GT37 features a single, larger 88-millimeter (ind/exd: 63.5mm/88mm) compressor wheel with a 72.5mm turbine size, larger than the 64mm of the GT32.

With more airflow resulting in more power, say goodbye to the Super Duty’s 400 horsepower and 800 lb./ft. of torque. Comments Power Stroke technical specialist David Ives, “The original designers of the current Power Stroke V8 diesel forecasted needs for higher output. This facilitated the larger turbocharger, increasing airflow and creating more power.” More power necessitates fuel system improvements. A new high-pressure fuel pump and fuel injectors, along with all-new injector tips, and a new exhaust temperature sensor, can be expected.

Increased horsepower and torque necessitates a handful of enhancements for the Ford Power Stroke including: a new torque converter for the 6R140 TorqShift six-speed transmission; improved crankshaft fillet design; increased crankshaft damper weight; new five-layer head gasket; added material to cylinder heads, exhaust manifold and valvetrain; redesigned turbo oil and cooling lines; piston assembly upgrades; and four-layer exhaust manifold gasket.

2015 Ford F-450
The 2015 Ford F-450 will host a variety of upgrades to bolster performance and improved towing capability, including a strengthened frame, new commercial-grade 19.5-inch wheels and tires, upgraded rear driveline U-joints, new rear leaf springs, front and rear stabilizer bars and shocks, stronger steering gears and steering linkages, larger brakes, and Power Stroke calibration specific to the F-450.

Stay tuned for a full story in Diesel Power Magazine!