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Ok I need to set the end gaps on my Supercharged small block Chevy. Reusing my old Weisco pistons. I believe that I set the original gaps at .022 top and .018 bottom before without incident. So that is what I set the Speed Pro rings at. But now I just see the instructions for Speed Pro call out for .024-.026 top and bottom. So I know that is a safe bet but I have them set perfect at .022 top and .018 bottom and would like to keep it tight if possible for best longer life etc. Also I see that Speed Pro recommends a larger gap on the second ring as recent testing has shown a better seal doing it this way. This is the first I've heard of this but I've see there point where they say the larger escape path prevents the top ring from lifting up from pressure build up between the rings. What do you use for gaps and what would you do with bottom gaps...I'm may be old school in thinking the gap on the bottom can be tighter as the heat and thus expansion (closing of the gap) will be less. Let me know ASAP as I'm ready to install the pistons and of course Weisco is closed. I lost my Weisco original instructions. Going to try their web site now... Engine is a 355 Chevy (B&M roots style blower) with 450+ HP at the crank.
Thanks,
Jason
Thanks,
Jason