gday all,im just chasing after a bit more go out of the old 4.2tdi(2004) it was tuned before I got it, running 12psi of boost(according to my autron gauge) egt's will hit 650.c occasionally,big hill driving hard,but generally sits on 300.c on the highway,doesnt blow hardly any smoke,so my question is if I adjust the boost to say 15psi do I need to adjust the fuel pump at all or is this what the compensator does?? and will the extra 3psi make much difference,its a 2004 4.2tdi (295000 k's) 3" lift ,33"s 4.3/1 diff ratio,thanks for any advice.