318 Build.. Zero Deck or Stock Deck Clearance?

mopowers said

I always thought KB pistons required larger ring gaps because the ring lands were higher and therefore got hotter. I had no idea it was because of the material difference itself.

Click to expand...

Hyper pistons reflect more heat, therefore putting more heat into the chamber and running the top ring hotter. So, the upper ring gap is larger. But, the piston itself expands less because of it's improved thermal conductivity, so you also run tighter piston to cylinder clearances.

Here's some of the specs
#2---- Clearance Requirements for Hypereutectic Pistons

Chart is originally from United Engine & Machine Co. Incorporated, Performance Pistons