if you can get some cheap ga16 injectors there is no harm in trying them out to see if your ecu can cope with them. or pick up a used fse power boost valve to increase the fuel regulation. i take it your not running any cats at the moment as i believe over rich may damage them.
also maybe more importantly do you know for a fact that your 1.0 ecu will make your cga3de run lean? in the case of cg10de to cg13de conversions the 1.0 ecu makes it run more rich not more lean.
btw i run ga16 injectors and they are definately needed in my case(pbv on its own was almost ok.) but i have ga16 ecu and tb also.
