im not really know the side effect lahhh
but fromwhat i know from my fren, he said that u can't high boost ur car roughly 0.3-0.4 bar.cox it will karboommm wen it is running too lean.
if u want to high boost, u got to change the in ternal part like piston, metal head gastket, additional boos controller, extra injector,e manage to fine tune ur car.
then i will cost u a boom to do all this.
around RM2000-RM4000.
then my fren finally change to real turbo engine, to save all the unwanted problem.
this what i know from my fren.but u can go back to ur usual workshop to ask for the assistsant