lancer oz ce 2002 4g15

hey guys need some advice on turbocharging a stock 4g15 lancer engine runing around 6 to 7 psi boost. i've been talking to sooo many people and mechanics been on so many sites and the reactions are very mixed. and i'm really confused now . there seems to b a lot of them in hot 4s, that stil run the standard computer too. all i want is 130 to 140 kw atw with an intercooler. is it possible, if u make the custom manifold, add piping and turbo but leave the standard injectors, cams, rods, head gasket? if any one knows anything on the specifics of a 4g15 engine and adding a turbo to it,please let me know
Thanx
Arzoo

dont waste your money