It's for high cylinder pressure (turbo or supercharged) engines. This separates the crown load/deformation from the skirt sideload / deformation, and also reduces piston mass.
I'm not a diesel guy, but I've seen pictures of these in highly boosted race engines .
That is a steel piston. Those have been around for about 20 years. It's designed to be as light as a aluminum piston. And no they are not meant for only low RPM motors.
I'm not a diesel guy, but I've seen pictures of these in highly boosted race engines .
Guys have made over 2,000 hp with them in a Cummins application.
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