hey i have adjusted my max fuel and am runnign my rebuilt k03 turbo at 12PSI i only adjusted the screw to maybe 100 more rpms should i see a big diffence i do need it to be relativly good on gas as i drive 200ks per day......plus i dont really see any black smoke when i get on it...little puff but nothing crazy just alittle puff!! with the stock turbo and those couple mods am i fighting a lost battle for alittle more speed>>>>