u better off getting an aftermarket ecu if u plan on further mods.. a chipped ecu will need to be re-flased each time you make significant changes..
if u handy with a spanner, take off your induction kit and see if can get a better look at the front turbo, maybe able to identify the turbo
also re: dyno graph, do u have one showing what boost was being run.. u based in the uk??