Today's adventure started with a trip to Home Depot Motorsports but they didn't have acid core in larger than 1.5mm. So off to the next best place... Walmart... glorious.
Picked this up from the crafts aisle; not my first rodeo doing deck clearance measurement with putty as I've done this method before on a
VR6 we took 1mm off the top of the block for performance. That engine drove for almost a decade including 7yrs in Phoenix before the owner sold. It's an easy method and gives you the measurement... I know there are clever people building contraptions to take the measurement with a dial but this also works.
Arts and crafts:
Roll the piston down in before installing the head and torquing down:
Turned the engine 5 times and removed head; result:
Caliper says I have .68mm clearance now. Not looking to be a hero finding the last hp by running .93 so ordering .5mm from the host. That should put me at 1.18mm with a bit of a margin for safety.