My build has been going slowly, but I currently have a block at the machine shop. It is a sleeved block with Arias pistons made from 2618. After the hone they said they will end up at .0065" piston to wall clearance. The machine shop said it would run, but they recommend new pistons. I was wondering if this much clearance would be ok in a boosted application, giving room for heat expansion? or should I just order the new pistons?

Would appreciate any advice from experienced builders.

 

This might Help!
Also, Piston Manufacture has Clearance Specs, use those.......

 

thanks! I will probably end up ordering new pistons to do it right.