It’s the lowest compression ratio of any Powerstroke engine Ford offers.Ī higher ratio means that air is more compressed in the cylinder. The compression ratio was lower than the previous, 6.4L Powerstroke's (17.5:1) ratio. The compression ratio of the 6.7L Powerstroke is 16.2:1, the same as the 6.7L Cummins diesel engine. Mostly due to emissions, but also because of power and noise, The cast aluminum pistons changed in design quite a few times until Ford's engineers settled. To improve strength and durability, the forged rods have an end cap rotated 45 degrees. The crankshaft is made out of steel, and it features 6 bolt mains. The result was a stronger and lighter engine that came with better fuel economy and better performance. Due to graphite's strong chemical bond, the material turns out twice as strong. Steering away from the heavy cast iron that most diesel engine blocks are made out of, Ford made the 6.7L Powerstroke's engine block out of c ompacted graphite iron (CGI). This resulted in more engine bay space, reduced exhaust volume, and quicker turbo spool-up. This design results in turbo lag and high temperatures.įord's 6.7 Powerstroke is the first diesel engine with the exhaust coming out towards the engine valley and into the turbocharger. On a turbocharged V8, the air flows through the exhaust headers and into the turbocharger. On naturally aspirated V8 engines, the air enters from the valley and exits to the headers located on the outside. The major change to the cylinder head is the flow. The cylinder heads have 4 valves per cylinder and a glow plug. A gutsy choice considering the history of unreliable aluminum cylinder heads Duramax being an exception. Ford 2020 6.7 Powerstroke Specs (Scorpion) Cylinder Headįord made the cylinder heads out of aluminum.

Turbo 350 transmission oil capacity