2020 Powerstroke upgrades

Dave5143 wrote:
Am I seeing things or are those pistons flat as a pancake? What would keep them from wobbling and getting stuck in the cylinder?

A couple of reasons.

1. Because the steel piston is stronger they can place the wrist pin high up into the piston along with a longer connecting rod. This geometry creates less side loads and less friction.

2. Because a steel piston has similar thermal expansion as the engine block, a steel piston can have a tighter fit into the cylinders which requires less piston walls and again less friction

Some benefits of steel pistons: less friction, improved fuel economy, less CO2 emissions, stronger, higher tolerance to heat, high mileage durability, improved cylinder sealing and less oil dilution.