Bigger injectors won't do anytything unless you can get more air in so you can actually burn the extra fuel. The extra fuel will just wash the oil from the bores and increase wear, as well as reduce power and increase fuel consumption. If bigger injectors = more power they would have bigger injectors from factory.
I put Almera injectors in mine, it ran extremely badly, so I quickly put the old ones back in. As said above without the extra air and fuel management they are pointless.