Jazza my 550cc rx7 injectors are as good as ANY 550cc injectors, and do the job the same as any other one would.
Merlin they are difficult to tune with ONLY when remapping the STD ecu. Not an issue on PFC.
People say they run poorly on skylines because because of the spray pattern. They are designed for a rotor.
Mine are in, and are tuned. NO idle issues, poor economy etc AT ALL.
They get 10Lt per 100kms, and are no different to any other injector.