well i want to plan for the future, esp with e85 coming eventually there is no point getting 700cc or 800cc injectors now only to have to replace them if and when E85 does come, as it is the stocks are running at 90%+ duty cycle and i am not happy that is on the street tune.
as far as drivability issue is concerned if setup properly there is non. there are two people running 1050cc injectors in melb that i know without issues. and countless more in nsw/qld. actually it was some nsw person who showed me these injectors and him and his tuner have been running them. they are delphi ones so are good. the only problem is that my WB O2 sensor is stuffed so i need a new oneto retune the fuel maps again, which means i am not sure i will be doing it in the near future anymore.