Jump to content
SAU Community

Rb25det In A 91 300zx 2+2

RKLamb

By RKLamb,
in Engines & Forced Induction

 Share

Recommended Posts

RKLamb Apprentice

RKLamb

Posted
Posted

Well I will try this again. Hello guys I am from the states and I am trying to put a rb25det in a 2+2 Z32 1991. Well before I get started and someone ask. Yes I have done the vgtt swap, three times, and all three times the engine were basically screwed. The first had lifter tick and locked up on a cold day. The second was done completely wrong by the mechanic and I scrap it. The third ran great until the white smoke started pouring out the drivers side, needed new rings. So after long debate and no success I said screw it and sold all my VG stuff and started over.

Well since researching all I can you guys seem to be the RB kings. So I decided to join to soak in all your your knowledge. There are very few here who have put a RB in a 300zx and they are not much help at all. So my goal is only about 400 hp and be daily driver thats it.

To start of my engine is out of a stagea which as we all know has a the same ecu as a R34. So I need some advice on that and just the basic on conversion. So here are my questions.

1. On the stagea harness there are some different connectors just above the ecu plugs. On a 300zx it has one of those plugs which contains the wiring for the consult, ignition, etc, but what is that other plug above next to that.

2. If I have a R34 style harness if I am using nistune do I use a version 4 board but the progam for a R33 rb25det. Its not a NEO so I guess I would have too use base RB25det.

3. How much Hp can I get with all stock running a greddy intake and 300zx maf

4. My oil tree does not have a oil tree on it or an oil cooler like some I have seen. Exactly where is the oil cooler on a stagea RB25det non-neo.

5. Finally if any one has some good pics showing the different parts of a stagea engine or pics of a Z32 with a rb swap it would be greatly appreciated. Wiring looks like the hardest thing now.

:):)

Link to comment
https://www.sau.com.au/forums/topic/292872-rb25det-in-a-91-300zx-22/
Share on other sites
RKLamb Apprentice

RKLamb

Posted
  • Author
Posted
The z31 200ZX?? Comes out with an RB20det asuming the engine bay is the same size as the Z32 there should be no issues with fitting the engine

Sorry about typos up top I meant the oil sensor. On some of the RBs I have seen there is a oil pressure sensor on the oil tree next to the filter where is it on the stagea.

Also since I got a oil pan out of the 200zr fitment should be no issue but its the harness. I cannot figure exactly where all the connection go and I also want AC. Anything special to wiring up the AC. On a Z the ac has a small connector that hooks into the main harness. Im not sure if the ac hooks into the harnesee on a Rb. Also the Z has two harnesses, one for the engine and one for everything else.

RKLamb Apprentice

RKLamb

Posted
  • Author
Posted
Sorry about typos up top I meant the oil sensor. On some of the RBs I have seen there is a oil pressure sensor on the oil tree next to the filter where is it on the stagea.

Also since I got a oil pan out of the 200zr fitment should be no issue but its the harness. I cannot figure exactly where all the connection go and I also want AC. Anything special to wiring up the AC. On a Z the ac has a small connector that hooks into the main harness. Im not sure if the ac hooks into the harnesee on a Rb. Also the Z has two harnesses, one for the engine and one for everything else.

Also does the stagea RB engine use map or maf and what is the difference.

Sandeep Community Regular

Sandeep

Posted
Posted

Have you checked out the Stagea FAQ? http://www.skylinesaustralia.com/forums/St...nd-t102808.html

There are some pics in this thread of a zed with a rb25 in it.

http://www.aus300zx.com/forum/showthread.php?t=289044

Are you on rbz32? http://rbz32.com/

There is plenty of info on there regarding rb swaps into the Z32

RKLamb Apprentice

RKLamb

Posted
  • Author
Posted
If you need wiring digrams on anything be specific and i can look them up in FAST for you.

Hey I appreciate that I use too have that program. I love the charts and printouts. The main thing I am wondering is on the harness. Is the RB harness a one piece with cluster connectors and all or is it a two piece like the 300zx Z32. The Z32 have an engine harness for the engine, ac, mass air and consult port. Everything esle as far as the dash, fans, lights, fuel pump controller, steering assist, pwr brakes and all that are on the sub harness. I see a lot of connectors on this RB harness that makes me think it is a one piece harness.

RKLamb Apprentice

RKLamb

Posted
  • Author
Posted
Considering a z32 ECU can be used to run an RB25 engine.Why not keep the z32 ecu and loom and adapt it to fit the rb25? Should be fairly easy change a few sensors/plugs over and your done.

I already sold all from the Z. lol. I was going to use the Z ECU thinking I was going to get a r33 harness and loom. Instead I got a R34 style ecu and loom. So I cannot use the Z ecu now. So the engine is completely wired up all I have too do now is connect it to whatever is needed in the car itself.

RKLamb Apprentice

RKLamb

Posted
  • Author
Posted
don't let John @ UAS see this thread.. he will get angry

LMAO yeah i am already hearing it from all my Z club friends most do not talk to me any more. lol. My plan is to get this up and running then get a RB30 block and build it up. Using the heads off of this engine I will have the infamous RB30. Now with that being the case even a VG owner would have to bow down. With a 3.0 running a fat turbo and inline 6 I will kill almost any street legal supra or Z32. lol

I can get the block for like 450 shipped. So basically I want to get this up and running and by the spring I will start putting the RB30 in. That will be sweet.

Oh does anyone know if a stagea has VTC or not.

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

    • brillo
      Leak from Tokico BM50 Brake Master Cylinder

      By brillo · Posted

      Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      PXL_20250828_063541093.TS.mp4
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • PranK
      R35 GT-R production ends after 18 years

      By PranK · Posted

    • SteveL
      Leak from Tokico BM50 Brake Master Cylinder

      By SteveL · Posted

      I don't get in here much anymore but I can help you with this.   The hole is a vent (air relief) for the brake proportioning valve, which is built into the master cylinder.    The bad news is that if brake fluid is leaking from that hole then it's getting past the proportioning valve seals.   The really bad news is that no spare parts are available for the proportioning valve either from Nissan or after market.     It's a bit of a PITA getting the proportioning valve out of the master cylinder body anyway but, fortunately, leaks from that area are rare in my experience. BTW, if those are copper (as such) brake lines you should get rid of them.    Bundy (steel) tube is a far better choice (and legal  in Australia - if that's where you are).
×
×
  • Create New...