Piston rings

[Mohundro]

New to IA and new to building motors, I'm building my first one, i have a gsr block with .50 oversize aftermarket type r pistons, what size piston rings do I need?? And help would be helpful

[1civic]

Umm, should have came with rings!

[1civic]

.50 is not ideal for stock sleeve, but do your thing bro! With that said most all the rings you buy are file to fit anyways.. .

[Mohundro]

So do I Need 81.5 rings?

[EmminoDaGreat]

82.25 would be .50 over .20 over is 81.5, .40 over is 82mm.... etc..

[Mohundro]

So the top of my pistons say 0.50 I'm 20 over?

[1civic]

So the top of my pistons say 0.50 I'm 20 over?

No.. read above again!! Piston would be 82.25, all else fails measure the piston!!

[EmminoDaGreat]

measure it. or don't try to build it yourself....