Jump to content
SAU Community

Rb20 < Rb25 Turbo Upgrade

Leeroy94

By Leeroy94,
in Engines & Forced Induction

 Share

Recommended Posts

Leeroy94 Enthusiast

Leeroy94

Posted
  • Author
Posted

I'll consult a tuner before the install to look at my fuel pressures etc.

Is this nipple on the IC piping going to the intake plenum? I have a strange thing poking out of the piping already that almost looks like a spark plug. My original thoughts were that it was just screwed in to seal up the screw hole that's there so maybe this is the nipple that your talking about?

GTSBoy Grand Master

GTSBoy

Posted
Posted

Is this nipple on the IC piping going to the intake plenum? I have a strange thing poking out of the piping already that almost looks like a spark plug. My original thoughts were that it was just screwed in to seal up the screw hole that's there so maybe this is the nipple that your talking about?

No. On RB20 turbo it is a small brass hose barb coming off a boss on the front of the compressor housing. The boss is there on RB25 turbos, but it is not drilled and the barb is obviously not there. On RB25s they fitted the tapping onto the intercooler pipe. It won't be on your pipework as standard. If you have something it will be because someone added, perhaps for a different boost controller iinstallation.

The hose is only 6mm, or possibly even 4mm ID. The hose (stock) goes direct from the hose barb to the wastegate actuator. If a boost controller is installed then it goes via the boost controller before heading to the actuator.

  • Like 1
Even_Flow Enthusiast

Even_Flow

Posted
Posted

Also I have been told to install that nipple closest to the turbo as possible(or there abouts) for an accurate WG actuator reaction. So in between the turbo outlet and intercooler or 'the hot pipes'

  • Like 1
Joshbigt62r Proficient

Joshbigt62r

Posted
Posted

My opinion is you should really get a tune done if you plan to run more boost than say 10 psi on the 25 turbo on a rb20. Im not up to date with pricing on Nistune boards but is the $990 you stated earlier on the Nistune board installed + tuned? Im guessing it is.???

my suggestion to you is try and find some 444cc standard GTR injectors which come up in the F/S section all the time. Im pretty sure there a direct bolt in, although you may also need the GTR resistor pack. Another member can confirm??? Get the nistune installed and tuned and enjoy. Getting it tuned will make a reasonable difference to power/torque/drivabilitly/engine longertivity and overall better fuel consumption as has been stated.

I could say more but out of time have to go back to work.

Josh

  • Like 1
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

I remember a forum member name CEFF13 or something similar had pre-made safe tunes (pretty rich and ignition wasn't too advance) for RB20DET with usual bolt ons and a RB25DET turbo for like $150 delivered, including the IC socket etc...

All you needed to do was desolder your old chip and pop in the new one.

I used one back in the days and managed 180 ish kWs at a dyno day.

  • Like 1
Leeroy94 Enthusiast

Leeroy94

Posted
  • Author
Posted

yeah okay.. I guess the only thing I can do right now is install the 25 turbo..

Next track night (yes its a track car) is next friday on the 22nd. So I might attempt the installation the following week.

Ill post results of installation.

Even_Flow Enthusiast

Even_Flow

Posted
Posted (edited)

I also found out yesterday that my 20 turbo elbow doesn't fit my 25 turbo.... Swear I read somewhere they were the same size??? I found the 20 elbow was marginally smaller....

Edited by Even_Flow

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

    • Nizzy_R34
      r34's love to squeal

      By Nizzy_R34 · Posted

      just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • Duncan
      Engine sputter

      By Duncan · Posted

      My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Duncan
      S1 Autech 260RS Wiring Diagrams

      By Duncan · Posted

      Awesome, thanks for sharing!
    • Duncan
      Nissan fuga 450gt android screen

      By Duncan · Posted

      To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
    • GTSBoy
      Nissan fuga 450gt android screen

      By GTSBoy · Posted

      So, now all you need to do is connect the 2 or 3x 12v feeds into the unit to permanent 12v, ACC 12V and IGN 12V that you can find in the spot behind the stereo, and the earth, and then it will switch on with the car.
×
×
  • Create New...