typically a shot of nitrous on a turbo will make more hp then on a N/A because of the cooling effect.
On turbo street bikes a 10hp shot has made almost 40hp.
If your turbo is not maxed out I would just turn the boost up a little and not mess with the nitrous. Something that could be fun to try is to put the nitrous on a wide open throttle switch and a window switch. so you pin it and it applys the nitrous to spool the turbo and shuts off the nitrous at say 7,000 rpm. My throttle responce is good enough on my turbo xp to not even think of messing with it. Just too much of a mess to screw with runing a wet kit or programing and having the extra fuel with a dry kit.