Can you guys help me out and help me identify which is which?

They look similar and I can't really tell which is which?

Thanks,

F0B

In my world AFR means air fuel ratio but I don't think that's what you are talking about. Care to clarify?

Sorry about that yoshimitsu. I got the words mixed up. I was requesting about the FPR part numbers. Anyone have experience using the small port FPR and getting success out of it?

Thanks

Hey FOB... pretty sure that the bigport and smallport run the same fuel
pressure. So you should have no problems running the smallport FPR on
a bigport rail providing you can connect it... the return hosetails go in
different directions.

AE92 smallport part # 23280-16070
AE86 bigport part # 23280-16020

Cheers... jondee86

Thanks man.

I keep on reading that guys that run smnallport FPR on smallport swaps always run rich, so I wanted to isolate these cases and find out some real world experiences from other people.

Smallport runs bigger injectors than the bigport. So if you run smallport
injectors on a bigport ECU, its gonna run rich.

EDIT: Should have checked with the Club4AG Tech Reference before I opened
my mouth Tech ref says bigport FPR pressure @ 2.55kg/cm2 and
smallport FPR @ 2.90kg/cm2. That means you do have to be careful which FPR
you use, because if you used a smallport FPR on a stock bigport, it would
overfuel by roughly 14%.

Cheers... jondee86