11-05-2021, 10:57 AM
(11-05-2021, 09:48 AM)JonE Wrote: Question - do new pistons come at exactly the stated dimension, or are they minus the few thou in expectation that the bore has been done to stated dimensions? If anyone has a split skirt +040 in decent nick, do shout!
Generally, the bores are made to exactly the oversize stated so a +0.040" bore will measure 2.240" exactly. However, most responsible rebore shops will ask for the pistons so that they can check the piston size for themselves to make sure that the clearances have been allowed for correctly in the process. Split skirt and solid skirt pistons have different clearance requirements I believe.