This is what they advertise. I'm ordering pistons and rings tomorrow
Federal Mogual E251K premium moly ring set. *Top quality for use on the street or track. *Approved for use with a moderate power adder. *4.000" standard bore (oversizes available), 5/64" / 5/64" / 3/16" ring thickness.
The E251k-030 is just a good stock replacement moly ring. For 10 psi it will be fine as long as the engine dosent have a lot of compression and the air temp does not get excessive. I did a experiment on one of my turbo cars and have a set of just regular moly rings in it and have ran it a 27psi and made 1500 hp at the crank. Been in the car 1yr now and no problems.
So a piston with a 1/16" ring, I was thinking about buying Probe reverse dome pistons -22cc they have 1/16" ring groves and will still give me good compression,I've heard good things about probe lately..