Not sure about injector size on a 1.5r...although if you get bigger injectors you will NEED a tune or you'll just run extremely rich and depending on the size you get, you could wash out your AFR ratio causing the car to barely run.
oic thanks for the info
BTW read on the web that by installing a fuel regulator you can alter the spray pattern of the fuel injector
and by lowering the fuel pressure you can alter the AFR causing it to run lean thus saving fuel.
is that true ?? if that is the case how low is too low and how high is too high