Jump to content
SAU Community

Recommended Posts

Ok. I've seen numerous threads where people put RB25/26 Heads onto a RB30e bottom end. That's fine as both engines are fuel injected and uses ECUs. I even saw the RB30E build PDF on the internet and it stats what is needed for the whole conversion.

Now, i'm asking something different this time. Don't use the ECUs. How about taking the bottom end of a RB30s (Carby) and putting on a RB25DE Head from a R32 (non-vct). That would work right. I know that will fit but......

The problem now is where can i get an intake manifold to mount Webers and trumpets onto a R32 RB25DE Head? Finding one is near impossible. Will the carby intake from the RB30S fit the R32 RB25DE Head?

This is just for information. If information is scarce, then i'll abandon the project. I'm not going high power here. I'm not even going to turbocharge it. Just looking for something different.

Thanks.

post-48477-1261281791_thumb.jpg

post-48477-1261281888_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/300797-rb30s-with-rb25de-head/
Share on other sites

http://www.skylinesaustralia.com/forums/Rb...on-t298759.html

I asked a similar question. and the c*nts got stupid and started talking about putting a 202 into it instead.

don't abandon the project. keep looking.

Yeah, information on RB30S seems close to nothing. I guess no one has ever seen one lying around. Guess i have to search deep into Japan websites to find what i'm looking for.

Yeah i saw the link, got flamed instantly lol. Sometimes we are just looking for experiments and that's why we come to SAU...to get information. Not to be depressed and saying that efi is superior and such. We know it's superior but we're not aftering power here.

The RB30s and RB30e heads use the same inlet manifold pattern. So the RB30s inlet manifold won't fit your twin cam head. You'll probably have to custom make something.

Your other problem will be ignition - correct me if i'm wrong - but the twin cam heads normally use coil packs. That means you'd also have to figure out a way to fit a distributor too.

Comments about the RB30s lack of ability to rev seem to ignore that the camshaft profile for the patrol is likley to be very different to the RB30e in the skylines. The patrol is set up to have good power from idle for 4WDriving and higher revs are not really required for a standard 4WD.

You'll need to modify the manifold... BUT DOOO IIITTT.....

Use the stock 25 manifold, cut off the throttle body flange, remove all the injection gear then weld up the injector holes, weld on a side draft flange, bolt on a large side draft carbie. OR an LPG set up.

Ignition? Modify a cam gear to run an rb30 distributor off the front (speedway guys running vh's or lexas v8's do a similar thing), then run the ignition al-la rb30. It just has to spin 1:1 rotor button to crank.

Get a set of extractors, then mess with the cam timing to get the best low down torque results.

Just make shure you run some reasonable compression and tune it as well as you can (with LPG or carbie), if you go with LPG you can use alot more static compression.

Doooooo iiiiiiittt!!!!

+ if you get bored with it, drill and tap the injector holes, thread in a set of nitrous foggers and run 150hp of nitrous/fuel into the thing.

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


  • Similar Content

  • Latest Posts

    • I thought Australia got rid of the "drag dodgy fuel up to 91 RON with ethanol", which is why all E10 advertise as "up to 94 RON" ? Anyway I put E10/91 in the missus' Mazda because she empties the tank weekly, when all my cars get 98RON. tl;dr - turbo - 98 RON, if you can't afford that, sell it and get a commuter car (or tune your car for 91, which no one does).
    • Yeah i found that alot of parts can be wrong or "very" hard to get the real right one. I already bought some brakes years ago on me "old" GT calipers and they were wrong too 😄  I told them too. Even send them pictures...but they said "EBC catalogue has them on my car... So i dont know what their answer will be. I call monday them and let them know that they are really not on my car. If they were they would be already on a car...
    • Welcome to Skyline ownership. Yes, it is entirely possible parts websites get things wrong. There's a whole world of inaccuracies out there when it comes to R34 stuff (and probably 33 and 32). Lots of things that are 'just bolt on, entirely interchangable' aren't. Even between S1 and S2 R34's. Yes they have a GTT item supposedly being 296mm. This is incorrect. I would call whoever you got them from and return them and let them know the GTT actually uses 310mm rotors. Depending on where you got them from your experience and success will obviously vary.
    • Hi...a bit a "development" on the brakes. I spoke to the guys where i get brakes from...and they are saying that 296mm EBC are for R34 GT-T. I then went to their site: https://www.ebcbrakes.com/vehicle/uk-row/NISSAN/Skyline (R34)/ and search for my car(R34 GT 1998 - it has GTT brakes) and it show me this USR1229 number and they are rly 296mm rotors... So now iam rly confused... The rotors i have now on the car are 310mm asi shown... So where is the problem? Does the whole EBC got it wrong or my calipers are just...idk know what?  
    • Oh What the hell, I used to get a "are you sure you want to reply, this thread is XX months old" message. Maybe a software update remove that. My bad.
×
×
  • Create New...