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tarmac-
Joined: 29 May 2006
Posts: 106
Location: New Zealand.
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 Posted: Wed Nov 28, 2007 7:00 am Post subject: rb25det series 1 vs 2 ECU's |
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ive always thought they had different ecu plugs.. eg, cant plug in a RB20DE ecu into a SERIES 2 RB25DET.. am i correct, because if not, yeeehaa.
secondly, if they dont fit, is much involved to make it fit? |
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tarmac-
Joined: 29 May 2006
Posts: 106
Location: New Zealand.
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| Posted: Thu Nov 29, 2007 9:47 am Post subject: |
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bump.
from further research - s2 dont have an ignitor pack, its fired from within the ecu.
im thinking it still will work using a tuned rb20det ecu in the series 2 engine/loom with no wiring mods other than VVTi ...
can someone please advise as my engine is ready to be tuned, just need to know what track to go down.
thanks  . |
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Jollwah
Joined: 22 Nov 2007
Posts: 23
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| Posted: Mon Dec 03, 2007 4:17 am Post subject: |
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use S2 coils, As far as i can tell the ecu works the same.
A z32 ecu can be used and it will control the nvics system.
wiring changes would include inj & ign driver mods to suit firing order and to reverse the polarity of the steering rack switch.
not sure about the knock sensor wiring as z32 only has one. |
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davesteedy
Joined: 27 Apr 2008
Posts: 5
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Jollwah
Joined: 22 Nov 2007
Posts: 23
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| Posted: Tue Apr 29, 2008 12:11 pm Post subject: |
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I just checked the pin out info that i have for both ecus and yes it does look that way. |
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davesteedy
Joined: 27 Apr 2008
Posts: 5
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| Posted: Wed Apr 30, 2008 5:24 am Post subject: |
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| Hmm, you know how the batch fire works? Maybe they don't need to be changed??? |
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Jollwah
Joined: 22 Nov 2007
Posts: 23
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| Posted: Wed Apr 30, 2008 10:43 am Post subject: |
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I'm pretty sure that the rb20 ecu injects fuel sequencially and only uses batch fire when in limp home mode.
Well the z32 ecu works this way anyway |
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stinky_1
Joined: 11 Feb 2007
Posts: 15
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| Posted: Fri Jun 13, 2008 3:34 am Post subject: |
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I can confirm that using the RB20 ecu with a 25 you must swap the 4 and 6 injector wires.
It seems that some people claim they did not have to do it, yet others do. So I am curious to know what exactly this is from. Is it possible some people are running on 4 cyl and just dont realize it?
My personal experience is from swapping a RB25 into a R32GTST using the stock RB20DET ecu with RB25 code on the chip AND the stock RB20 wiring.
here is the result
If you want to use the RB25 ecu you MUST switch injector 4 and 6
If you want to use the RB20 ecu with the RB20 wiring you leave it alone
If you want to run the RB20 ecu in a car with RB25 wiring, you swap the wires as well |
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