Rb25 Into R32 - Basic Guide

[Mad_Aussie]

hey guys,

in the middle of wiring a 25 into a r32, can someone point out for me which wire exactly is the 'grey injector wire by the main engine bay plug'? Is this referring to the ecu plug, or something actually in the engine bay? Because I cant work out what you're on about lol!

Cheers man, great guide otherwise. Should be able to fire it up today if I get a wuick answer. Cheers

[JDM32]

Oh great read this is, ill be attacking this conversion shortly. ill be buying an series one rb25 minus coilpacks, turbo and loom. Is it possible to run an aftermarket ecu for eg microtech ltx12s and the standard rb20 ecu together?

I was told that the rb20 ecu and loom will run all the electrics air con and so forth and the microtech will run fuel ignition etc. If anyone could clear that up for me or anything that would be much appreciated!

Jase...

[Baz]

Simply just cut away the wires from the microtech that you need from the ecu and leave the others still attached to the loom that goes to the ecu so that it can operate the air conditioning correctly

[noisia]

could you still use your power fc rb20det ecu with the new rb25? will it run vct?

[Simon-S14]

you can and no it wont. it isnt much of a drama tho.

I run an RB20 stock ecu on my 25 and have remapped that. putting an external RPM switch on to activate the VCT

[noisia]

gayyyy more missions if i go down the rb25 path.

either buy 25 pfc or get stocko remap

cheers for the heads up simon

[Simon-S14]

or get an RB20/26 PFC and a Rev switch, and control the VCT that way

Ive got the rb20 remap and no VCT atm, makes plenty power and torque, howevre i just picked up a rev switch to control the VCT so i'll hook that up

[noisia]

oh awesome, so just get a rev switch and use 20 pfc! i like!

cheers simon

[Simon-S14]

yep, i got mine from the states for 40 bucks. I'll post up dyno results with my new turbo soon.

[GTS4WD]

Awesome write up!

I wish I had this when i did mine!

Did you find that the car progressivly began to start harder and harder?

Im almost certain that the car starts too rich.

At first in a 1/4 of a crack it kicked alive.. but now it will crank for 4 or so full rotations before it kicks..

If so.. how did you overcome this?

[noisia]

nice, be looking forward to dyno results simon, see wot figures i may be aiming for!

[Simon-S14]

im gonna be running a 3071R now lol

but with stock RB25 turbo and RB20 ecu and no VCT i made 220 rwkw on 13 lpsi!

loved it, was so quick lol

[GTS4WD]

  GTS4WD said:

Did you find that the car progressivly began to start harder and harder?

Im almost certain that the car starts too rich.

At first in a 1/4 of a crack it kicked alive.. but now it will crank for 4 or so full rotations before it kicks..

If so.. how did you overcome this?

Anyone guys?..

I just dont want to be causing damage to the eninge..

[dori34]

can someone guide me to where to find the damn wiper plugs etc. cant drive in the rain coz of this lol

also my aircon doesnt work anymore

any ideas fellas?

Edited December 6, 2007 by whyte

[brent32]

just had a RB25VCT/30 put in my 32gtst thought i might aswell post pics and point out that although i have heard of people using the RB25 inlet manifold we couldn t get it to fit under the (aftermarket)bonnet because the RB30 block sits around 40mm taller in the engine bay. So now my RB has a greddy manifold(RB20 throttle), which then necessitated moving the clutch master cylinder along the firewall closer to the brake booster. Also changed the gearbox to the 25 and changed the tailshaft. Trying now to get the RB20 ecu to run this setup with SAFCII(still considering ecu options), still alot of work to do however this should give an idea of how it fits in the 32 bay.

[Oblivion]

  GTS4WD said:

Anyone guys?..

I just dont want to be causing damage to the eninge..

i would be looking at your cold start system. sometimes it takes a bit...might be your o2 sensor...at a guess.

  brent32 said:

just had a RB25VCT/30 put in my 32gtst thought i might aswell post pics and point out that although i have heard of people using the RB25 inlet manifold we couldn t get it to fit under the (aftermarket)bonnet because the RB30 block sits around 40mm taller in the engine bay. So now my RB has a greddy manifold(RB20 throttle), which then necessitated moving the clutch master cylinder along the firewall closer to the brake booster. Also changed the gearbox to the 25 and changed the tailshaft. Trying now to get the RB20 ecu to run this setup with SAFCII(still considering ecu options), still alot of work to do however this should give an idea of how it fits in the 32 bay.

looking good buddy, who made the plate to fit the standard throttle body to that plenum?? cause i dont want to get another throttle body lol. as for moving the clutch master i am getting a shortened one (clutch master that is). i am also running an rb25 loom and ecu and rb25 box, i only had to change the yoke on the tail shaft too, whoever says you need a whole new shaft is wrong..

Will put up pics when i am all done.

[r32J3003]

i just had my conversion done. the only problem i hav, is the slight vibration on 1-2k rev... i had jus checked my tail shaft and its in perfect condition .

thus i was told that this vibration might be caused by the gearbox mounting, that's not aligned. Currently i only had 2 screws screwed to the mounting. Could this be the main reason my gearbox is vibrating?

Besides the tailshaft issue, any other known cause?

-oops, sorry for the spelling, im too used to typing over the mobile phone....

Edited April 11, 2008 by r32J3003

[Simon-S14]

learn how to f**king spell first.

i could answer all your questions but its too much of a head f**k trying to work out what the hell you just said

[r32J3003]

i had just edited it...

sorry for the abbreviations and spelling....

[dori34]

^ LMAO!!!

check your engine mounts..