Jump to content
SAU Community

N1 24U Block Oil Galleries Size?

ToF

By ToF,
in R Series (R30, R31, R32, R33, R34)

 Share

Recommended Posts

ToF Experienced

ToF

Posted
Posted

Hi guys,

Does anyone know if the RB26 N1 Blocks have smaller restricted oil galleries?

I've searched around the web and also this forum but can't seem to find any definitive information on this (Maybe I suck at searching?). Wiki page states:

The engine also received improved water and oil channels within the engine block. (http://en.wikipedia.org/wiki/Nissan_RB_engine#RB26DETT_N1)

But this statement does not provide any sources and is pretty vague.

On another forum it was reported that:

Oil curculation to the head is actually reduced in the 24u. Stock rb26 oil gallery orifice is 2mm, n1/24u oil gallery orifice is 1.2mm. This helps to prevent blow by, oil leak from valve guides and insufficient flow to the crank journals. (http://forums.gtrcanada.com/gt-r-tech/19517-24u-n1-block.html)

But following that claim, the person who had the N1 block actually measured the oil gallery from the top of the block at 2mm.

So are the oil galleries really smaller on the N1 block or not? Is it restricted down inside the block but opened up at the top to match all head gaskets?

Any info would be appreciated.

Thanks guys! :)

Link to comment
Share on other sites
GTRNUR Grand Master

GTRNUR

Posted
Posted

I've not noticed any difference at all between the oil galleries in an N1 vs 05u block.

Head flow galleries are the same size as well. The restrictor size is for the most part irrelevant as everyone tend to knock in a 1.1 to 1.5mm restrictor anyway.

Link to comment
Share on other sites
ToF Experienced

ToF

Posted
  • Author
Posted

I've not noticed any difference at all between the oil galleries in an N1 vs 05u block.

Head flow galleries are the same size as well. The restrictor size is for the most part irrelevant as everyone tend to knock in a 1.1 to 1.5mm restrictor anyway.

Thanks for the reply. Anyone else want to weigh in on it as well?

I understand the restrictor size would be irrelevant if both oil gallaries are the same. If I was to rebuild I would definitely put in restrictors but I'm looking at buying a GTR with an N1 block and the ad doesn't state whether restrictors were used in the build or not. That's the real reason behind my question.

Link to comment
Share on other sites

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

    • Nightmare_mistress_R33
      CD009 RB Conversion

      By Nightmare_mistress_R33 · Posted

      I am currently going this route. I am curious how much horse power you put behind the cut bell housing? Collins was telling me I am going to crack it and bluh bluh bluh. Because I didn’t buy the custom fly wheel from him. I am looking for somewhere around like 500 hp
    • Beanie
      Hello from the UK

      By Beanie · Posted

      Forgot to mention that these are the before pics when I first got it!
    • Beanie
      Hello from the UK

      By Beanie · Posted

      Thanks @PranK for the updated member status, much appreciated! 👍🏼 Now, about those pics… Unfortunately I could only find ones that I took in the dark. I was soon to discover that underneath it wasn’t in the best shape, but it was mine and that’s all I cared about at the time 😆
    • r32-25t
      PRP RB26 cast block + head prototype running

      By r32-25t · Posted

      Buy one
    • GTSBoy
      A little PU bush story

      By GTSBoy · Posted

      Oh, and only having done this task yesterday, I've now driven the car ~60km since, and while it is hard to avoid placebo effect and confirmation bias, I reckon that some annoyances I had with the way the car has been behaving have improved. Which....kinda makes sense, I guess. If the bushes were really stiff and resisting rotation, they would have been contributing to the effective wheel rate. And if it was more so on one side (which it was, because one side was worse than the other) then.... you might imagine that the additional rate would be asymmetric, and potentially even different between compression and rebound. And so... the car has been twitchy at higher speeds - like freeway on ramps. It really shouldn't be. The wheel alignment is good and there are no (other) known problems elsewhere in the suspension. But at 90-100 on a long sweeping ramp, tiny steering wheel motions would make it feel like it wanted to rear steer. Quite nervous. At lower speeds it would heave about in a manner that it didn't use to. Didn't want to put power down, etc etc. Now...seems to behave better. Am going to have to concentrate on the various corners where it has exhibited weirdness, on the rare occasions when I can get a decent run at them without Methanial getting in the way in his D-Max/Ranger/LDV Van/etc.
×
×
  • Create New...