Jump to content
SAU Community

Rb26dett Head On An Gtt Rb25det Block

TriniGT

By TriniGT,
in Engines & Forced Induction

 Share

Recommended Posts

TriniGT Experienced

TriniGT

Posted
Posted

Alright, this will be my next projec tonce I get my S15 RB26DETT up and running but as for now I am already acquiring some parts, namely the damaged RB26DETT engine. I have done a bit of searching and people are saying that you need to machine the headstud holes and retap, some others also said you can use the RB25DE headstuds and they work proper, can someone clarify. What else needs to be done, was thinking about a new headgasket and a baffle and the usual RB26 headwork for oiling problems. Can anyone advise me who has done it as I am thinking along this direction. If the damaged engine has a good block and crank then my swap will be an RB26 but not sure until it is scrapped, guy just told me it was a spun bearing and the crank needs polishing but no one can know unless it is scrapped. Let me know what is needed as I am thinking along these lines.

discopotato03 Grand Master

discopotato03

Posted
Posted

Good question that , non VVT head on VVT block - if the 26 block is RS .

I suppose you could look for an R32 RB25DE block and fit it with piston oil squirters and good internals .

I think American mobs can sell you non metric threaded fasteners but you have to get the block drilled/threaded and not sure about the heads bolt holes .

Ask SK , cheers A .

  • 3 weeks later...
Adriano Grand Master

Adriano

Posted
Posted

What exactly do you want to know? The head will bolt on using rb25 head bolts, but as i said the compression ratio will be low due to the difference in cylinder volume. You really aren't gaining anything by using a neo bottom end, as a non-neo bottom end will end up with a more appropriate comp ratio. You could get a set of non-neo forged pistons and fit them to the neo bottom end, that will fix the comp issue.

TriniGT Experienced

TriniGT

Posted
  • Author
Posted

Okay are you sure that using the RB25 headbolts I can bolt on the head? The reason I am using the Neo bottom end is because the RB26 engine that I am getting has bottom end damage and that I already have an RB25DET Neo engine in my GTT. Maybe the RB25 forged pistons may be an option I can look at, thanks. I just want to confirm that the headstuds from the RB25 can work on the RB26 head without worries, can you confirm firsthand?

TriniGT Experienced

TriniGT

Posted
  • Author
Posted

I wanted the individual throttles and also the intake mani run on the side for shorter coldside piping, and also maybe do a twin turbo setup all at the same time, oh and the wow factor :/. Actually I am getting the RB26 for a good price and getting aftermarket intake manis for the RB25DET Neo is harder and expensive along with the harder to get injectors and then the exhaust manifold. Okay so RB25DE or is it RB25DET headstuds or are they the same, gonna do a search now?

TriniGT Experienced

TriniGT

Posted
  • Author
Posted

Yes I know but I am getting the entire head for a good price and having the individual throttles is an added bonus as well as the twin turbo setup. Let's not harp on the topic I just want to make sure you can use RB25 headstuds and if so is the RB25DE and DET headstuds the same, I am thinking so. Thanks to all for the input BTW.

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

    • DatsunBanana
      Rear subframe stay bracket bolt removal issues

      By DatsunBanana 路 Posted

      Thanks both. All good advice. Reminds me of drilling through stone wall for drainage pipe 馃槵 I'll let you know how I get on if I still have use of my hands afterwards 馃槄
    • The Bogan
      NC MX5

      By The Bogan 路 Posted

      Finally got shipping number for the intake and throttle body, shipped by UPS, so "should" be in my hands sometime next week, fingers fracking crossed
    • GTSBoy
      [HOW-TO] Winter Steam-Clean & Odour Removal in 30 min

      By GTSBoy 路 Posted

      I'm so far behind in the jobs I have to do at both work and home (including car) that I have become immortal. There's simply no way that I can die now.
    • The Bogan
      [HOW-TO] Winter Steam-Clean & Odour Removal in 30 min

      By The Bogan 路 Posted

      Each to their own I guess  Me, I put just as much time into cleaning inside of the cars as I do on the outside As for getting wet, it is really no different than steam cleaning the carpets at home, apart from the cars carpet dries alot faster than the house, again, I only do it in the hotter months and leave the car opened up for a few hours As I only do it yearly, it is just before I do the diff and gearbox service, so I clean the carpets, then it's up on stands, wheels off, service, clean the undercarriage,  grease the bushings and do a nut and bolt check on everything  Disclaimer: I typically had all the time in the world to kill when I was working 馃ぃ, so spending a full day or 2 cleaning, serving and "looking at stuff" was,  easily achievable, and a fun mental therapy day As for time to kill, I retired last Wednesday, so apart from my physical training, my days are filled with lots of random jobs around the house and garden...."Idle hands are the Devils something something" I am also buying a new house sooner rather than later, I'm actually looking at a potential property tomorrow, I'm looking forward to getting a car hoist as I'm starting to get to old to crawl around under a car, I can only imagine all the undercarriage cleaning and looking at stuff when that gets set up
    • GTSBoy
      [HOW-TO] Winter Steam-Clean & Odour Removal in 30 min

      By GTSBoy 路 Posted

      Yeah, I'm not interested in wetting the carpets, and I don't care about brown dirt/dust that lives deep in the pile or underneath. It's not like I crawl around on them in my birthday suit or eat dropped food off them (because there is never any open food in my car). The seats are alcantara (cheap Chinese imitation alcantara, to be sure!) with barely 1" of foam pad behind the surface. That's not getting wet either. Any car that I would be happy to get the interior wet, I would not care to put the effort into.
脳
脳
  • Create New...