I will soon be having my 2.0tdi remapped, hopefully by Celtic tuning who did my previous car, I can either have a economy map which will boost the figures from 174 bhp up to 206 and take the torque from 280 lb/ft up to 328 or the stage 1 map will take the BHP from 174 up to 228 and the torque from 280 up to 361. The maps are written by themselves rather than just a generic ecu file.
You think this is a small gain and not worth doing?, interesting, when I had my old Mercedes done it made a massive difference to the overall drive of the car. What sort of figures would you expect from a ecu map then? Alway interested to listen to opinions.