4AGZE Bore size

[ENKI]

Just wanted to know if a specific bore size is given for putting in the ZE 0.5 O/S pistons or is it just the standard 81mm plus the 0.5mm?
My engine builder said they usually give a specific bore size for most pistons.

Nick

[DX20VT]

My block is at the engine machinist now for the same thing,
there is a clearance you need but I dont know what it is.

My race engine builder does the calc's by measuring the piston at operating temp and goes from there.
I'll see if i can find out what he told the machinist.