[G4 Plug in WRX v3/v4(help)]

this car fitted with aps sr40 turbo, sard 650.c.c injector fuel pressure setting 40psi. the car run well but when the car reach 4k to 5k the car start jerking, but the a/f is on 11.2 after 5.5k the car run as normal. all in full throtte

[sard 650cc injector side feed]

can any one help me to get the sard 650cc injector spec for the link ecu setup? 650cc SARD 13ohms 1.5ms

[plug in ecu for rb25det]

any new plug in g4 ecu for nissan skyline r33 rb25det?