Rb25det Into R32

[noakespg]

Hey guys,

Im looking at removing my RB20DET and replacing it with a RB25DET.

Are there any major complications or is it a straight swap?

[blind_elk]

Physically, it's a straight swap. You will need a half-cut to get the loom and ECU to suit the engine.

[noakespg]

Im getting an engine with the loom and ECU. I know the RB20DET box will bolt up, will it be ok for the extra power?

[Oosh]

So long as you don't run a hardcore clutch, i.e. button, then it should be fine.

I've seen first-hand a RB20 box stand up to ~230RWKW of RB26 day-in day-out, including track and drift work, no worries at all.

[blind_elk]

Try a search for stuff I've posted previously on this topic. You may need to go back 18 months or so.

[RedDrifter]

Yeah RB20 boxs are underatted more than they should be as they

are a strong box just they dont like being flat changed.

[Cubes]

They don't like RB30DET's torque in third with over 200rwkw.

They strip it clean.

But definitely an under rated gearbox, I'm impressed with mine, if it went tomorrow I would not be dissapointed with its strength.

You will need to sus out the wiring as the ecu pin outs are different.

Edited January 17, 2006 by Cubes

[nF]

i was under the impression you could run an rb25 in an r32 without replacing the entire ecu+ loom

plumb up the vvt, and retune ?

[blind_elk]

The VVT is an electrical thing - ECU controls a solenoid. The R32's ECU won't know anything about VVT.

Of course, that assumes that the engine you are fitting has VVT.

[Cubes]

Are the loom plugs within the engine bay exactly the same?

Then you will have to change the ecu pinout if you wish to take advantage of vct.

Edited January 17, 2006 by Cubes

[RedDrifter]

The VVT is an electrical thing - ECU controls a solenoid. The R32's ECU won't know anything about VVT.

Of course, that assumes that the engine you are fitting has VVT.

<{POST_SNAPBACK}>

When did VVT start in the R33 RB25's?

Series 1, 2 or?

[BHDave]

Are the loom plugs within the engine bay exactly the same?

Then you will have to change the ecu pinout if you wish to take advantage of vct.

<{POST_SNAPBACK}>

Nah, there are a lot of little differences.

I think it was blind elk who ran a modified rb20 loom with an r33 ecu?

I modded the 33 loom to the r32 body plugs. The underdash plugs are a headf$%k to get right and i had to add a couple of the r32 plugs to the loom to run the water temp sensor for the climate control and also the fuel pump dropping resistor and also wire up the main power plug on the passenger side front near the airbox.

It's a good days work if you have done Nissan wiring before. A bit more if you can read diagrams but aren't fully familiar with the way nissan likes to do things (things like earth triggers and the like)

[BHDave]

When did VVT start in the R33 RB25's?

Series 1, 2 or?

<{POST_SNAPBACK}>

All 33's with 25's had VCT. the RB25DE in the 32 didn't have it

[Roy]

I've seen first-hand a RB20 box stand up to ~230RWKW of RB26 day-in day-out, including track and drift work, no worries at all.

<{POST_SNAPBACK}>

LOL...between nut bags and Ash, well they proved that the old RB20box isnt too bad if you have a sensible clutch behind it.