Thread: Piston clearance??

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what are you talking about sbc 350?or400 you go from 4.063 then you say 4.065 then say 4.161 i bore engines and hone them all the time first off you never finsh a bore till you have the pistons and check real size.... i all ways leave 005 to 002 less for honing this has alot to do with your boring bar and how good a finsh cut it makes my F2b rottler puts a very nice finsh cut so if i am not QT honing i leave .002 to 003 to hone to finsh size with deck plate i will bore with it on the engine or leave .005 under size and hone to finsh size . with cast pistons and hypers you can not go + over bore much . some forged pistons made from 2618 you can go + over size lets say you have a bore of 4.125 +030 =4.155 and you want more piston to wall for hard use . if you have lets say .003 at 4.155 then you could go to 4.157 if you wanted .005 piston to wall but you would finsh the bore with boring bar .005 under size to hone to 4.157 so you stop boring at 4.152 if honing with a deck plate and all 400s chevys should be Tq plate honed all pistons have built in size they are made to. so they have the right piston to wall size when hole is bored and hone to size of over bore