Jump to content
SAU Community

My Rb25/30 Build

works 510

By works 510,
in Engines & Forced Induction

 Share

Recommended Posts

wal32r Collaborator

wal32r

Posted
Posted

I spoke to nissan, the numbers on the diagram are reference numbers only, RB25DE and RB26DETT valve spring part numbers are different, and R32 and R33 GTR valve spring part numbers are different also.

The guy from nissan assumed the GTR springs would be considerably stronger.

  • 2 months later...
works 510 Experienced

works 510

Posted
  • Author
Posted

Thread revival!

Budget got raped...

large majority on funds were spent on the oiling system, still shooting for max reliability.

VCT has got the ass, mainly due to a pair of 272 8.8mm lift cams finding there way to my shed, possibly too large, but for $330 the pair, Im willing to try them out. :D

Starting to assemble the bottom end on the weekend, will throw up a few pics as it progresses.

[200] Mentor

[200]

Posted
Posted
I spoke to nissan, the numbers on the diagram are reference numbers only, RB25DE and RB26DETT valve spring part numbers are different, and R32 and R33 GTR valve spring part numbers are different also.

The guy from nissan assumed the GTR springs would be considerably stronger.

I noticed that myself when I was stuffing around with fast. I just cbf updating the thread...

  • 7 months later...
  • 2 weeks later...
Amoreuxi Newbie

Amoreuxi

Posted
Posted (edited)

With the price of rods these days its worth throwing a set in.

If you decide you want to throw set of cams, plenum and 'decent' balancer at it then you feel safe to flick her to 8000rpm odd.

BUT. with 8000rpm you'll be pushing 340rwkw+ and most likely a gt35r unless your ringing the neck out of a GT30, not that ringing the neck out of a GT30 is a bad thing. Its a damn near perfect setup for the power IMO. The response and power delivery simply cannot be described other than a big power N/A with a big top end. I miss mine.

Just don't forget the requirement for a decent clutch and with 340rwkw comes the likely possibility of breaking an rb25 gearbox if the clutch and tyres are decent.

Torque breaks things.......

Edited by Amoreuxi
  • 7 months later...
works 510 Experienced

works 510

Posted
  • Author
Posted

its been awhile....

in between holidaying, other commitments, work and losing interest in my car its finally running.

Well, has been for the last 9 months, still sorting out bugs that the car has/had.

Currently running on rb25 injectors, afm and ecu to put some km's on the engine and sort everything out.

First impression: drives goooood, drives well at low speeds, the IHI turbo isnt too laggy.

Now,

Inconsistant idle.

Sometimes it idles high, some times not at all.

Idle control valve?

Cheers

  • 1 year later...
Sarumatix Veteran

Sarumatix

Posted
Posted

Just going back to the discussion about valve springs (as this is one of the first threads on valve springs to show on google :)), can anyone confirm if R34 RB25de also has the same valve springs as Rb25det? I know the camshaft has less lift.

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kapr
      Possible swap on R34 RB20DE NEO?

      By Kapr · Posted

      Hi. A little bit of an update. It maybe(hope not) looks like i would need a new tranny(it would be "maybe" a cheaper or better option anyway) So i need some info. I know i need a different propshaft(i can make custom one) LSD is not a problem cuz the engine will be still(for now) N/A RB20. So if i buy RB25DET NEO tranny...is there something else i need? I read something about push/pull type but i do not know if i need to "change" something or i can just plug n play onto my engine a go? Thanks for the advice  
    • OakvilleGTR
      Turn signal wiring question

      By OakvilleGTR · Posted

      Good morning all, Bit of a random question but figured I’d finally throw it out after wondering for a long while. Before I start, I'm hoping to do this purely out of personal preference. I think it would look better at night, and don't mind at all spending a few hours and dollars to get it done. I've copied this from a non-Skyline specific forum, so I apologize for the explanation of our headlight switch setup that we all know. Here we go: Zero lights (switch off) Parking lights (switch position 1) being a rectangular marker on the outside of the housing, my low beam being the projector in the centre (position 2), and a high beam triggered by my turn signal stalk. Most North American cars I’ve owned of this era have power to the amber corner (turning indicator) light as part of the first switch (parking lights). I’d love to have these amber corners receive power when the headlights and parking lights are on (headlight switch), yet still blink when using the turn signal which is of course a separate switch. Hopefully I’ve explained my question correctly. Is anyone aware of a way in which I might be able to achieve this? Thanks in advance
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      My heads are cathedral port! It's likely possible, but I don't want to add any extra moving parts (I know they don't move) between the heads, manifolds, etc. It will also affect how injectors/fuel rails etc sit and I don't really know if it would change how the FAST manifold goes/sits/fits. I have the LS6 steam pipes already as I have a very late LS1 block so it should be fine. I couldn't find anyone who had ever actually used one for this purpose, it seems 100% of people grind the water pump. The thermal spacers are 12mm and are half way to the cost of the newer water pump anyhow... so if it comes to that I suppose I'd rather buy a new pump. The bearing in the pump I do have is a little.. clunky, but it hasn't done that much time and I never noticed it when the car was together in the past few years, so..
    • sonicii
      Lower A arm Skyline v35

      By sonicii · Posted

      The bushing has failed, not all that uncommon for a car of this age.  Any mechanic should be able to push in a new bushing for you, or you can probably buy the entire lower control arm, complete with bushes.
    • The Bogan
      Mistakes were made, my R34 Story

      By The Bogan · Posted

      Could you not use "thermal" spacers to give the clearance, like the ones I used between the blower and head? That raised the manifold height by around 10-15mm Albeit the ones I used were for cathedral ports, but I assume they have similar for rectangular ports????
×
×
  • Create New...