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Rb20 To Rb25 Conversion In R32 - Which Parts Can I Retain From My Rb20!?

Lukaz

By Lukaz,
in Engines & Forced Induction

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1400r Veteran

1400r

Posted
Posted (edited)

err no you dont mate put my 20 into his silvia when I put my 25 in

he used a advance r32 front pipe and so did I

maybe if you doing custom mounts or something you might have to

but cefiro crossmember rb20 mounts on a 20 no problem into s13

r32 crossmember r32 mounts on to 25 into 32 no problems

rb25 vs rb20 starter motor

rb front pipe vs s13 front pipe

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Edited by 1400r
GTS4WD Grand Master

GTS4WD

Posted
Posted
hope its not the starter motor behind this.... mine isnt finished yet and i will be using the rb20 starter motor on the 25 still. Hope i dont have to change that too :D

I dont think it is..

It starts very ritch..

I have a feeling it has something to do with the fuel pump regulator or something of the sorts..

With the two Rb25 into R32 convo's i have done I noticed that the guage speed reads MORE than your acctually doing..

The only two probs I have had..

OH!.. and the pully at the end of the crank.. make sure it has as many grooves as all of the other pullies in the system..

BHDave Grand Master

BHDave

Posted
Posted
^^ That's not what the clutch guy that built my last clutch said.

If what you're saying is the case, will that mean I need a new starter motor when I upgrade to a 25 box?

I use an rb20 starter still. I had the 2 sitting side by side when doing my rb25 swap and decided to stick with the one i knew worked. Flywheel ring gear is the same size so there's no problems there. It works with both 20 and 25 gear box. Why wouldn't it?

  • 8 months later...
BigC1988 Enthusiast

BigC1988

Posted
Posted
Hey all, doin a 25 conversion on the R32. Im just wodering what parts from my Rb20 will swap over? I only have Rb25 block and head, no manifolds, CAS, etc etc.

Im 99% sure my exhaust manifold will swap over fine. But what else will? and What will I need to buy seperate?

Cheers in advance!

I just got my RB25DET (series 2) and I was hoping you could help me with some questions.

My Skyline is non turbo so it will be a big step with the RB25.

Now then, my first question is about the gearbox mounts, I hear they aren't the same and I will also have problems with the speedo meter. What do you know about this? Can I use the Xmember of the R33 ??

The second is about the harness, everyone that has ever swapped an engine told me that the harness is the most difficult part of the swap. Do you have the diagram of the R32 and the R33 (still can't find it for the R32) and some pointers on how this is done??

Hope to get a reply from you soon

Carlos Rudolph

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