Well if you want more power, especially turbo, the engine would of course be less economical. But if you want to stay mits, why not go all the way and get a 6a13tt
Thanks for the advice so far guys but i don't want to be another vrg to vr4 conversion. i'm looking for something a bit different. The 6a12 mivec sounds interesting, got any more info/advice on it??