How much can you mill (H22A) before you would need to cut the valve reliefs in the pistons?

I will be running wiseco pistons 11.5:1 (with a .015 mill)

 

Aftermarket pistons have larger reliefs than stock forecasting the use of larger valves and so you will have No problem with a .015" mill. I am running type-s pistons with a .020" mill. I clayed the engine when assembling and I had a lot of room to go too. So no problems yet. HTH
the Pirate

 

Thanks man!!! would you go 0.030 with crower stage 3's?

 

stage 3's?.. you might wanna check the clearance's.... be safe.. clay

 

yeah i'll clay it first

 

You better have some good springs for Crower Stage 3's.

I just saw some the other day and the ramps are ridiculous fast.

 

Wouldn't the Crower Spring & Retainer kit work with the Stage 3's?