Intercooler is fine realy best decide how much you want to spend a remap the big thing wll see about 110hp depends how hard they map and torque limit due to the clutch.So basically, upgraded intercooler is the best bet to start with.
No one has bothered making bigger injectors but if they did the best sort of power out of the standard turbo would be 130bhp or could more be possible?
A bigger turbo and injectors (if available) would push this figure even higher? Of course an upgraded clutch/gearbox would be needed though.
Am I right in thinking a new Micra dci is the same engine/intercooler/turbo? Just thinking it could make an entertaining sleeper (and a few grand cheaper too!)