piston rings

[mebe007]

ok so i finally got my motor striped down. my pistons are .060 over keith black 231's. rings are 1/16, 1/16, 3/16. so i was looking at rings and wanted to know the difference here

http://www.summitracing.com/parts/UEM-4000BD8-065/
Plasma moly but are file fit (so not really for me then)

http://www.summitracing.com/parts/UEM-4000BM8-060/
and these are moly but are not file fit (these originally came with my pistons)

now i notice the moly ay iron but the plasma say ductile iron for the top ring. both have cast iron 2nd rings.

so are the moly ones just fine or is there another brand to look at etc? thanks for the help. need to get rings and stuff ordered. block is headed to machine shop on mon.

 

[13bravo]

The Moly's are fine I'd get the non-file fit rings because the KB pistons need to be file fit with a larger gap anyways. The file fit rings tend to have way too much to file off with KB pistons.