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Rb26 Into 33 Gtst

ahh 33 s2

By ahh 33 s2,
in Engines & Forced Induction

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ahh 33 s2 Mentor

ahh 33 s2

Posted
Posted

hey all, i hate asking a question that im sure has been answered but i searched a few different things and could find what i needed.

im putting in a r32 rb26 into my 33 gtst, and not sure on the wiring,

i have both a r32 gtr loom and my standard 25 loom, i was under the impression that i could use the main loom from the 26 and the drivers side loom from the 25.

but after speaking to a local workshop over the weekend they said i would need to mash them both together to get it to work

if this has been covered in depth can u please link me the thread,

thanks for any help

cheer dan

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ronnydotk Contributor

ronnydotk

Posted
Posted

I'd be interested to find out too. I plan on doing a r32 RB26DETT into r32 gts-t. I was under the impression that because the engines run stand alone ECUs that using the ecu for the engine was the best way forward (minimal amount of mods to wiring). Only thing i have thought might need to change is the alternator and starter motor cables (use original from vehicle i'm guessing)?

But yeah if anyone has done this swap i'd be interested in some details.

Mark-32 Community Regular

Mark-32

Posted
Posted

Use the 26 engine loom obviously but there is a plug on the rb26 loom near the air flow meter plugs that needs powering up.

This caused me lots of problems when we got mine going as on the gtr's that plug continues around the front of the car round to the driverside battery area.

  • 1 month later...
Craved Grand Master

Craved

Posted
Posted

yeah its a grey wire from memory (we put rb25 into a patrol and had to supply this wire with power)

but the loom at the ECU end is different, doesnt have the big white plug on it that connects into the dash loom

BH_SLO32 Proficient

BH_SLO32

Posted
Posted

I have done a couple of RB26 R33 GTR engine looms modified to suit the R33 GTST and it is not an overly difficult exercise given the similarity with the looms because they are from the same model. The R32 RB26 loom however will require a significant rewire if you plan to use it in the R33 due to the location of the major power feeds being different (ie the R32 main power feed is via one of the 8pin plugs near the power steering reservoir but in the R33 looms the main feeds are via the white plug near the ECU in the cabin).

The other 8pin plug near the power steering reservoir in the GTR looms feeds the fuel injector dropping resistor block. You will need to ensure you grab the mating plug and wires and the dropping resistor when doing the conversion.

If you wish to make the GTR loom a plug'n'play loom you will need to remove the Rb25 white plug (near ECU) and wire it into the GTR loom. You will need to do the same with the 8pin plug near the power steering reservoir. This is what I do when making RB25 or RB26 plug'n'play looms for the R32s, cerfiros etc.

Hope this helps

BH_SLO32 Proficient

BH_SLO32

Posted
Posted (edited)

whats an easy way to tell if you have r32 or r33 rb26 loom Ben?

The cabin plugs near the ECU are different. In the R33 there is 1 large white plug whereas the R32s have 3 separate and smaller plugs. I have attached some photos of a modified R33 GTR loom to suit an R33 GTST. Note the large single white plug near the ECU. I have also attached a photo showing the dropping resistor I wired in near the power steering 8pin plug.

post-16836-0-69938200-1304132946_thumb.jpg

post-16836-0-47498600-1304133183_thumb.jpg

post-16836-0-98781300-1304133264_thumb.jpg

Edited by BH_SLO32
BH_SLO32 Proficient

BH_SLO32

Posted
Posted

damn, means i bought a 32 rb26 loom :(

Is the pin outs for those 3 plugs easy to find?

Unfortunately not but with the ECU pinout diagrams and wiring diagrams you can sort it out if you are prepared to put some time into it.

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