An all-new 6.2-liter V-8 gasoline engine is standard on the 2011 Ford F-Series Super Duty. The new engine delivers 405 ft.-lb. of torque (at 4,500 rpm) and 385 horsepower (at 5,500 rpm) on regular gasoline, which is an increase of 40 ft.-lb. of torque and 85 horsepower over the current 5.4-liter V-8.
“Our all-new 6.2-liter V-8 engine uses race-proven components and technology that have been optimized for the high performance and efficiency that our Super Duty customers demand,” said Mike Harrison, Ford V-8 engine programs manager. “It delivers not only significantly better torque and horsepower than current heavy-duty gas engines, but also improved fuel economy.”
Nearly all the components of the 2011 Super Duty 6.2-liter V-8 are shared with the 6.2-liter V-8 engine found in the 2010 F-150 SVT Raptor, a purpose-built, high-performance off-road truck versatile enough to take on the most challenging desert adventures as well as the everyday commute. In November 2008, the 6.2-liter Raptor R not only survived the grueling Baja 1000, it earned a podium finish.
Core to the improvements is the adoption of an all-new engine architecture with increased bore spacing that allows better engine “breathing” in both the intake and exhaust for more power and more overall efficiency.
The new gas engine runs on regular-grade gasoline, E85 or any blend in between.
Design features of the new 6.2-liter V-8 engine
Large bore, shorter stroke: This approach to creating power has its roots in Ford racing engines from the past. The large bore (102 millimeters) allows for larger intake and exhaust valves for improved engine breathing, and the short stroke (95 millimeters) allows higher engine speed for increased horsepower. Still, peak horsepower is generated at a relatively modest 5,500 rpm.
SOHC valvetrain with roller-rocker shafts: The single overhead camshaft (SOHC) per cylinder head design results in a stiff valvetrain that allows optimized camshaft lift profiles and helps produce great low-speed torque. The roller-rocker shafts allow valve angles to be splayed, resulting in optimized intake and exhaust port layout for better breathing.
Dual-equal variable cam timing: Intake and exhaust valve opening and closing events are phased at the same time to optimize fuel economy and performance throughout the engine speed range and throttle positions.
Two spark plugs per cylinder: Because of the large bore size, two spark plugs per cylinder are used to more efficiently burn the fuel-air mixture in the combustion chamber, enabling better fuel economy and increased engine torque. The twin plugs also help the engine maintain a smooth, stable idle.
Dual knock sensors: A knock sensor on each bank of cylinders of the V-8 engine allows the spark timing of each cylinder to be individually optimized real-time, throughout the engine speed range. The system continuously monitors engine performance and applies this real-time learning to optimize timing via an adaptive algorithm.
Better engine crankcase breathing and efficiency: Significant development work and computer-aided engineering optimized the cylinder block for more efficient airflow in the crankcase as the pistons move up and down in the bores, resulting in improved torque at higher engine speeds. Piston-cooling jets squirt oil on the underside of the pistons to keep the piston crowns cool under extreme operating conditions. The cooling jets also allow for a higher compression ratio for better engine efficiency and faster engine oil warm-up on cold starts, also improving fuel economy.