Thanks to j101 & oderf for the comments. I strongly believe that the psychological feeling that will makes us feel the improvement in the first place after the money we spend :) I guess i will put this plan aside first.
Meanwhile, I am actually planning to do a top overhaul soon since my current mileage already exceeded 220000km liow. Plan inclusive of:-
- change to CTR head, c/w valve spring, retainers & etc
- change to CTR 81mm piston
- change to ori CTR headgasket (remain 10.8 compression ratio)
- use back the B16B cams & ECU i m using right now
But still wondering coz my fren told me better not to overhaul the engine if it doesn't have any problem. You guys have any comment on this? Coz i afraid problem will start coming after the overhaul & then end up back to the square (start looking for a B16A & revert to ori...)