[Steve C.]

Back in the day when I was "throwing" lots of money at my different engine combinations we used to coat the piston skirts and the dome. Did I notice a difference, No. But all the tech material indicates a positive approach.

https://www.polydyn.com/pistons

Thermal Barriers
In theory, heat management offers great potential for improving an engine's power output. Often, ceramic-based thermal-barrier coatings (TBCs) are used to reduce heat migration, reflecting heat rather than absorbing it. They may be applied to piston-top surfaces and top ring grooves, combustion chambers, exhaust-valve heads and faces, exhaust manifolds and headers, and inside exhaust ports.

https://www.motortrend.com/how-to/hr...gine-coatings/



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