i'm curious as well. that's exactly what type of compression i'm looking for. you did't mention your heads and what's the combustion chamber volume. by me living in detroit, mi, i'm just 15 minutes away from diamond pistons and i think i'm going with them. i'm using trick flow a heads and they have the ability to custom make pistons that will totally fill the chambers. between $900-$1,000 a set though for the lightweight pistons.