I just read a Facebook post by JE Pistons that they've developed a billet top fuel piston. I didn't think a billet piston could withstand the forces in a nitro engine, that they needed to be forged. Or is that the rods?
I wonder how much this would change the reciprocating mass. I did look up monotherm pistions (never heard of them before), and they seem to be for diesel engines, which have a lower cylinder PSI. I know billet steel cranks can handle the load, but I wonder if a steel piston could.