I don't see why you need to be quite ignorant.

If you wish to have a technical debate then I have no problem with that but your comments seem to be a little bit childish and un-educated.

Yes, I removed and binned these "tuning boxes" plenty of times. They fit between the ECU and the fuel delivery pump whether you like it or not. Most of them are fitted at the Diesel temperature sensor.

At a certain amount of revs, just before full boost has been reached, they sure do pump in the extra amount of fuel to give it that little bit more power. Please can somebody post up their dyno chart with having one of these fitted?