So heres the rap up. I am going to have a "Diesel Smart Module" instaled. I spoke to Adam from supercar performance today, (very helpfull) he is organising instalation and dyno to get the best result. I like there system as it does not put stress on the fuel pump or injectors but controls the max boost of turbo and plugs into the back of the injectors to controls the timing and duration of opening of the injector. I believe diesels run better on less fuel unlike petrol engines. I will keep you all posted on the progress.