2020 6.7 Power Stroke w/Steel Pistons
Here's a video from Mr Truck. He missed it, but the new Power Stroke will have Mahle Steel pistons. This should make this engine platform good for an easy 1 million miles. Link
Forum Discussion
wrgrs50s wrote:
Wow, I was questioning the post on the steel pistons so I looked it up and sure enough, it's something that performance diesels have been using in their racing engines for a while. I never would have thought a steel piston would work because of the inertia weight. Apparently they've beefed the rods up to compensate.
Steel weighs twice as much as aluminum for the same volume. The designers may have been able to reduce the volume due to steel having a higher strength at high temperatures than aluminum but even if they didn't you can reduce the inertia stress by half just by reducing RPM by 30%. Since most diesel engines only turn about half the RPM of gas engines it doesn't sound like piston inertia would be too big of a deal. Also, any connecting rod that can survive the compression stroke of one of these diesels shouldn't have any trouble with holding the piston back at the top of the stroke.
