yeah, use 1.8 flat piston will loss high compression and response but its proven can make 170hp with e-manage, have done it with my friend car but use thinner gasket.. if use mivec 1.6, too high compression and if u make a simple mistake and dont properly monitor knocking, ur engine will not last long.. have experience it, use mivec piston, response kaw2 but knocking, advised from uncle zainal change back to 1.8 piston, knocking gone, response a little bit slow but no knocking and happily revving.. but if u use the car for specially for drag, then go for it..
---------- Post added at 04:42 AM ---------- Previous post was at 04:41 AM ----------
my mistake, not h22a, its v6tt.. mine friends use it..