Rb20 Ecu On A Rb25

[Douse]

Hey Guys and Girls,

Just a quick one....

I am planning to do a RB25 conversion in my 32, and i have had my current (rb20) ecu chipped and tuned etc.

I was wondering if that could be used on the rb25? Cause that would be a good grand I would save right there.....

I vaguely remember someone mentioning something about R33 SII and higher having different a ignition type in the coil packs?!? would this be an issue?

Thanks for your help, I am just playing with the idea and trying to cost something up

-Berny

[Cjmartz2k]

You can do it. Won't be able to use VCT run from the ECU. You'll need some kind of external RPM switch.

[bozodos]

Yeah I'd like to know this too in case I get rid of my Microtech, because I've only got an RB20 loom in there as well. VCT is disconnected though.

[Douse]

Cool, thanks for your help

[murrayis]

You will also have to switch 2 of the injector wires around from memory its 4 & 6 on the ecu plug.

[BH_SLO32]

It can be done but don't forget to cost a tune if you do use the RB20 computer. I always recommend modifying the RB25 loom to suit the application and that way you can use a power fc or similar designed for an RB25 and potentially retain the VCT and boost solenoid control if required.

Cheers

Hey Guys and Girls,

Just a quick one....

I am planning to do a RB25 conversion in my 32, and i have had my current (rb20) ecu chipped and tuned etc.

I was wondering if that could be used on the rb25? Cause that would be a good grand I would save right there.....

I vaguely remember someone mentioning something about R33 SII and higher having different a ignition type in the coil packs?!? would this be an issue?

Thanks for your help, I am just playing with the idea and trying to cost something up

-Berny

[robots]

I'm thinking of getting a cheap shift light and use it as an OFF switch for the VCT. And switch ON the VCT as the engine starts. So shift light would just work as an OFF switch at 4-5k rpm and it should be good. What do u guys think of this way ?

I can't think of the way to make a shift light to turn vct ON and OFF .

Edited May 13, 2009 by robots

[Douse]

Cheers!

Maybe a half cut would be the best option....

It can be done but don't forget to cost a tune if you do use the RB20 computer. I always recommend modifying the RB25 loom to suit the application and that way you can use a power fc or similar designed for an RB25 and potentially retain the VCT and boost solenoid control if required.

Cheers

[BH_SLO32]

Definitely the best option. At least this way you will get everything you need. It is the small things like brake booster vacuum line and the throttle cable (required if it is a series 1 Rb25) that can be overlooked with this conversion.

If you buy a motor only you need to make sure they give you the harness running to the starter motor as it incorporates the wiring for the knock sensors and air regulator.

If you want the standard RB25 loom modified to make it "plug'n'play" give me a yell.

Cheers

Cheers!

Maybe a half cut would be the best option....