I am building a 5.7 aluminum engine. diamond 3.905 pistons, wiseco 39050gk rings i am getting conflicting info as to what i should file the rings to. I was thinking .022 and .024. diamond says .o27 and .029 that seems a little large to me. what do you think, oh and i am running a t4/ t66

 

I had my 370ci pistons file fit to .22 the first & .26 second ring. Diamond rings here. for 15-20 psi max

 

i finally spoke with someone @ wiseco and they said .006 x bore for top ring and .0063 for second for boosted apps. how many miles do you have on your combo now?