Rb26 Pfc Working On Rb20/rb25

[The Mafia]

hey, already been for a drive. Can runs like the standard RB25 powerfc.

Just not quite tune perfected as the other one because I have spent much more time getting the tune spot on.

The only thing missing on my RB25 is the NVCS though - but I haven't been pushing it to notice it yet

[Gts-t]

Is laptop software readily available to tune the pfc? How much is it and where can i purchase it etc.

Im really interested in getting a 26fc for my rb20 that i also want to use on a rb26/30 in the future. Would i for any reason be better off just getting a rb26 loom with the head when i buy it and use a unmodified 26pfc?

Confusing stuff but awesome to see u guys are getting good results, will be watching closely cheers

[rob82]

Are you guys wiring in the iar temp sensor as well? Might make for a nicer tune. Also the fuel pump pins 106 107?? should pull to ground from memory not supply 12 volts.

[Cubes]

Rob,

I'll be using the inlet air temp sensor.. One big reason I've moved from the rb20 pfc to the 26.

There's no issue with the fuel pump FPCM control.

The GTST runs a constant earth through its dropping resistor and uses the ecu to trigger the FPCM which bypasses the dropping resistor with a clean earth. So the voltage goes high. This is done via pinout 104.

The GTR on the other hand has the dropping resistor built in to its FPCM so to speak. Pin 104 is activated to run the fuel pump at low and when off idle pin 106 enables for high.

The GTST won't have an issue as the low pin 104 signal it receives will cause the fuel pump to go high.

Pin 104 stays active when pin 106 (high) is active as Mafia has had no issues off idle I believe.

Does the GTR PFC retain its low/high fuel pump speed? The GTST PFC's loose it and run constant high.

If one wished to retain the low/high on their GTST they could simply use pin 106 instead of pin 104 to send the fuel pump in to high off idle.

Hope that makes sense.

So almost tooooo easy.

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Pin 106 is FPCM 2 and 107 is injector ground.

The IAT requires the usual sensor ground, is that what you were referring to?

As you probably know it really does require the datalogit as you have to fiddle with airflow curves and map references in order to utilize the load points correctly. + it makes tuning much easier as its close to being spot on before you start.

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A BIG thanks goes out to Paul and Mafia for being BRAVE.........................................

's

[Cubes]

Is laptop software readily available to tune the pfc? How much is it and where can i purchase it etc.

Im really interested in getting a 26fc for my rb20 that i also want to use on a rb26/30 in the future. Would i for any reason be better off just getting a rb26 loom with the head when i buy it and use a unmodified 26pfc?

Confusing stuff but awesome to see u guys are getting good results, will be watching closely cheers

Datalogit.. $500-$600 or there abouts from memory.

I personally wouldn't bother with a 26 loom. + it won't prove anything as unless u run 2 afm's and 2 o2 sensors you'll still have to make modifications to the loom or the pfc its self.

[Gts-t]

Thanks for the reply joel.

I have a remapped ecu at the momment but would love to get a pfc working, with or without a pfc loom adaptor. When you work out exactly what needs to be done could u make a pdf file like your rb30 one?

Also i thought u had a ap pfc already for the rb20? Why are u changing is it just for the air temp sensor? Do you need to buy this sensor from nissan?

Lastly what are the negatives of fitting the 26fc, i looked at pauls gotcha's and it seems the 02 sensor wont work or something?

Edited June 4, 2007 by 2630GTS

[MADGT4]

Huh....

Joel, wanna sell me your AP PFC lol

Unless you have sold it already or am i misreading the above post?

[Cubes]

Already sold.

These Rb26 PFC's appear very difficult to get a hold of.

I ordered mine from Nengun in early April. Its been ~9weeks and nengun are still waiting on Apexi to deliver.

[paulr33]

mine took a while, just gotta be patient

maybe youll see them on ebay one day for $100

when some guy in china manages to copy the boards and sell them as

car computer "look like powerfc"

true operation for your skyline

only $100

work just like apexi

full management engine!!!

[STATUS]

theres an rb20 ap eng FC on ebay for $1800 with bids

good son of rajab, thats hideous

geez i hope this really works

shit i may sit on my rb20 ones a bit longer haha

[Wheezy]

shit i may sit on my rb20 ones a bit longer haha

Or you could sell me one of em mandingo

[LTHLRB]

trent you should start looking into modifying gtr ones to suit gtsts... help us rb25 poor bastards out

[Cubes]

shit i may sit on my rb20 ones a bit longer haha

I believe that one went for $2150!!! :S

There was one on recently that I believe didn't sell for $1000 and another thats still on there now for around $1680ish.

[KURAUN]

theres a used one from geelomg now with hand controller for $1000 with like 19 hours to go or sumfin

[STATUS]

trent you should start looking into modifying gtr ones to suit gtsts... help us rb25 poor bastards out

yeah but i dont want to cut pauls lunch. I do a similar thing for silvia dudes... resolder jumpers and shite so that all the models work...

[Cubes]

Pauls no longer doing it.

I 'may' do a few 26pfcs for r32 rb20's but it will be for local sa only. BUT Even a 26 pfc is proving to be a pain in the arse to get so I may simply do mine and thats it.

[STATUS]

access have never let me down on PFC's and they are local..... i dont know why more people dont just go there.

[LTHLRB]

i think because their too expensive? how much do they retail trent?

[The Mafia]

here you go

Here's my little adventure.

It really isn't that hard hey. Just make sure the person doing the conversion knows how to tune properly! There are some setting that MUST be set correctly for this to work. If anyone nees these settings, I have done a DAT file for the RB25DET. I'm keen to do one for the RB20 - if anyone can loan me their R32..heh

Edited June 11, 2007 by The Mafia

[STATUS]

i think because their too expensive? how much do they retail trent?

Everything regarding price is relative.... I value my time very highly and i charge accordingly... a few weeks wait to me is far to long to save a few $$$ they have never not had what i want either... the other week i bought a d-jetro (rb26) for my emanage ultimate vs PFC test (results soon... quite suprising) and no-one could get one to me faster. Online merchants like nengun quoted weeks maybe months.

i needed a ap hand controller for a JZX90/Jzz30 chaser/Soarer PFC and they had one...... Price was irrelevant as no-one could get me one.... even my contacts in japan laughed at me.

If you shop on price alone you will never be happy...

Edited June 11, 2007 by URAS