Jump to content
SAU Community

Real Garrett Gt3071r (-23 Chra) On Rb25det Results Wanted .

discopotato03

By discopotato03,
in Engines & Forced Induction

 Share

Recommended Posts

discopotato03 Grand Master

discopotato03

Posted
Posted

Hi all , many here have been wondering what sort of power characteristics Garretts GT3071R (CHRA 700177-5023) turbo gives on mechanically std RB25DET's . By standard I mean the factory exhaust manifold so that the GT30 IW turbine housings can bolt up . In another thread someone mentioned they're making 270 odd Kw at around a bar of boost with Garretts GT30 IW 0.82 A/R turbine housing . I'd very much like to know where they climb into boost engine speed wise and how it all feels with part throtle driving .

Thanks in advance , cheers Adrian .

  • Replies 71
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Posted Images

SmittyR33 Contributor

SmittyR33

Posted
Posted (edited)

I made 230rwkw at 15psi with mine. Has internal wastegate and is on the standard exhaust manifold. The only thing I did to the manifold was port it out a bit and remove some casting marks and stuff. Other usual mods - Power FC, front mount cooler. Still on stock AFM and injectors.

I see full boost at 3300rpm and part throttle driving is good too. Pulls really good too even in 5th.

Pretty sure I have the .63 exhaust housing. Got if from GCG cos thats what they recommended.

Edited by SmittyR33
discopotato03 Grand Master

discopotato03

Posted
  • Author
Posted

Thanks , I'd really like to hear from people using Garretts GT30 IW turbine housings so we can all get an idea what to expect from using the 0.63 and 0.82 A/R housings .

Recently I thought I'd found a HKS GT3037 Pro S type turbine housing in 0.68 A/R but it turned out to be the 0.87 version , possibly a bit large for 2.5L and the 71mm GT compressor .

Cheers A .

Cubes Grand Master

Cubes

Posted
Posted
I made 230rwkw at 15psi with mine. Has internal wastegate and is on the standard exhaust manifold. The only thing I did to the manifold was port it out a bit and remove some casting marks and stuff. Other usual mods - Power FC, front mount cooler. Still on stock AFM and injectors.

I see full boost at 3300rpm and part throttle driving is good too. Pulls really good too even in 5th.

Pretty sure I have the .63 exhaust housing. Got if from GCG cos thats what they recommended.

That power doesn't really fall inline with the 'real' GT3071r. My bets are they supplied the cropped version.

OR.. Your dyno is simply very very conservative.

Sorry Disco to spam your thread but just to make it clear those figures the above has seen is not the norm from the real gt3071r.

discopotato03 Grand Master

discopotato03

Posted
  • Author
Posted (edited)

Yes thats what I thought as well . You could get somewhere near that figure at the bleeding edge on a 2530 I'd think .

A while back ATP was claiming that the real GT3071R pulled up 500-1000 revs sooner than a GT3076R though the feeling overseas is that it doesn't work like that . Most people using the 3071R in the US have them on 2L fours so the results are not the same as you'd get on a 2.5L RB 6 - particularly in a 1370 odd Kg R33 .

Most people for cost reasons don't want to change their exhaust manifolds and until a twin scroll twin integral gate turbine housing becomes available (no time soon) the IW GT30 housings is all we have ATM .

In the other thread someone mentioned 270 Kw at 1 bar and I was hoping they would tell me what A/R turbine housing (assuming its a GT30IW one) and confirm the -23 cartridge number . I would think if it is the real one and the propper housing type it must be a 0.63 A/R turbine housing .

Given Mafias results (300 Kw from a real GT3076R 0.63 A/R) obviously the hot side can pass the gas but the burning question is can the GT30 turb/0.63 housing combination spin the 71mm GT compressor fast enough to make it feel good on a fairly std RB25 powered R33 .

If we can make this work it will bridge the gap between GT28BB turbos and the GT3076R IW . If not then the only answers I know of are not going to be affordable for many people .

Cheers A .

Edited by discopotato03
The Mafia Grand Master

The Mafia

Posted
Posted (edited)
I made 230rwkw at 15psi with mine. Has internal wastegate and is on the standard exhaust manifold. The only thing I did to the manifold was port it out a bit and remove some casting marks and stuff. Other usual mods - Power FC, front mount cooler. Still on stock AFM and injectors.

I see full boost at 3300rpm and part throttle driving is good too. Pulls really good too even in 5th.

Pretty sure I have the .63 exhaust housing. Got if from GCG cos thats what they recommended.

That power doesn't really fall inline with the 'real' GT3071r. My bets are they supplied the cropped version.

hey guys

I have seen the turbo with my own eyes - Its a ground out RB25 rear housing fitted to the 3071.

If you remember a while back, I had a T04S 3076 with a ground out RB25 housing and water meth, and with 18psi I managed to squeeze out about 245rwkw.

It needs a real garrett housing strapped on.

Edited by The Mafia
skylinecouple Experienced

skylinecouple

Posted
Posted

Final cost delivered was $1800. Thats with the 14lb actuator and bracket and exhaust flange. After I paid I found a company equally as big that was $150 cheaper. Anyhow, there's a holdup on delivery to make sure it is the right 3071. Will speak to them tomorrow.

  • 2 weeks later...
skylinecouple Experienced

skylinecouple

Posted
Posted

Unfortunately I have to wait till I can get the time to do it as I work seven days a week. On the up side I have another car to drive around in January so may be ok then. Sorry guys. Parts are coming together slowly. Atp in the states are a big help, but don't talk to the receptionist, NOT helpful at all.

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


  • Latest Posts

    • MBS206
      S1 rb25/s14 starting problem

      By MBS206 · Posted

      Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I checked spark on all cylinders and they all visually have spark with the plug pulled and grounded, but plug 1 is the only one that fouled. This was a running swap that blew up and was rebuilt by a machine shop, put a new wiring specialties harness and did all gaskets, studs, and bolts while it was out.  compression is 135-150 across all cylinders. Aside from that from my understanding with the z32 ecu and maf the car should start regardless. The wiring for TPS and the dual 02 sensor/ dual knock sensor stuff shouldn’t actually stop the car from starting or even running well, (just slightly rich)  they just give fault codes. Car supposedly is supposed to start as long as you have z32 afm and ecu with the nistune base map and that’s info coming from a well known and trusted tuner who does a lot with SR/RB (Rsenthalpy). After more trouble shooting today where I’m at right now is that the cas is sending signal to the injectors they click while spinning the rotor, Fuel pressure is now set at 43psi, all cylinders have good compression and all of the plugs looked great (just wet with fuel) except for cylinder 1 which was very black (cylinder 1 has 150psi compression). all of the coils generate spark if pulled out and grounded out on the head. On the fuel pump car just pops into the exhaust. On starting fluid car will fire off. Hard to tell if all cylinders are firing off but definitley a couple. sounds like all of them but it’s only for 3-5 seconds hard to tell. 
    • DraftySquash
      Looking for someone with a R34 front bar

      By DraftySquash · Posted

      Final update!!! Got the front bar fitted and sprayed and all sorted now. My cutouts worked great and the indicators aren’t just falling off. 😂  
    • Dose Pipe Sutututu
      new 1.5 LSD issues/concerns

      By Dose Pipe Sutututu · Posted

      Is this a brand new LSD? if so, have you followed any break/bed in procedure for it? Usually involves heaps of figure 8 patterns, a fluid flush.
×
×
  • Create New...