I plan on getting a .010 high compression headgasket and milling the head .020. Im also installing supertech valves with titanium retainers and dual valve springs. Will the piston hit the valves and if not, what size cam can i get maximum so that the valves wont hit the pistons? Thanks,
-Terry

 

BTW, this is on a JDM h22a .
-Terry

 

Try claying the top of the pistons stock, then take that measurement and apply it to what you want to do. You should have your answer there.

 

Im sorry, but what do you mean by claying? Also, does anyone know with what im doing if the stock bottom end will hold up?? I just plan on getting titanium retainers, dual springs, valves, and im unsure on what cams to get, hondata.
-Terry

 

Put some clay on top of one of your pistons then turn the motor over by hand very carefully. After one full cycle you'll have the lest amount of clearance left on the clay. Then add a good amount for a safety factor.

 

Cool, thanks. Ill try to get that done and tell you guys the results.
-Terry

 

I dont want to rip apart my motor and find out that some stuff wont work properly. Does anyone know the piston to deck clearance for the jdm h22a? If i have that, then i can find out what my compression ratio will end up being with the headgasket i select and if the pistons will actually hit the valves depending on how thin i want to go.
-Terry