How to Identify SmallPort/BigPort FPR

F0Bman
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How to Identify SmallPort/BigPort FPR

Postby F0Bman » Wed Nov 27, 2013 11:30 pm

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
Last edited by F0Bman on Tue Dec 03, 2013 4:38 pm, edited 1 time in total.

yoshimitsuspeed
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Re: How to Identify SmallPort/BigPort AFR

Postby yoshimitsuspeed » Thu Nov 28, 2013 10:31 am

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

F0Bman
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Re: How to Identify SmallPort/BigPort FPR

Postby F0Bman » Tue Dec 03, 2013 4:40 pm

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

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jondee86
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Re: How to Identify SmallPort/BigPort FPR

Postby jondee86 » Tue Dec 03, 2013 6:39 pm

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
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.

F0Bman
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Re: How to Identify SmallPort/BigPort FPR

Postby F0Bman » Tue Dec 03, 2013 8:44 pm

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.

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jondee86
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Re: How to Identify SmallPort/BigPort FPR

Postby jondee86 » Tue Dec 03, 2013 9:46 pm

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 :oops: 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
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.