Jump to content
SAU Community

Recommended Posts

Guys that HKS GTRS is really just a GT2871R with a 52 trim compressor . Comes on song at 3700 on an SR20 ? My US SR contacts claim the larger HKS GT3037 52T spools at 25-2700 rpm and would easily out gun a GTRS . The 3037's are using the T25/28 flanged .73 ARR HKS GT30 exhaust housing and usually the RNN14 GTiR exhaust manifold .

That GT3071R at the GCG site is not the same as the one from ATP turbo in this string . The only way to make it work properly is with the HKS GT30 style exhaust housings . All the ones using GT28 exhaust housings are dogs - wrong type of turbine housing for the turbine .

Cheers A .

  • Replies 96
  • Created
  • Last Reply

Top Posters In This Topic

Those who have interest in the gt30 rb or vg hybrid.

There's a thread floating around where some one had a vg30 turbine housing machined up to suit their gcg highflow. If I remember correctly they went from 240 something rwkw to 270 something rwkw.

I plan to do similiar using a GT30 700177-7 CHRA and .6 Comp cover machined up in to the VG30DET/R34 turbine housing.

Hopefully push 18-20psi through it.

Or... there is also the GT30 700177-14 CHRA that runs the larger comp wheel. The only issue with this is I am unsure if there is a .6 comp cover available for it. I really don't want to run a .7 due to clearance issues.

Edited by Cubes

Why is choosing a turbo so hard?? ;)

I don't know a lot on turbo figures and everyone has something different to say - GCG say the turbo would be good for an RB25DET with RB25 turbine housing.

- discopotato who seems to know his stuff doesn't suggest it as a good combination

- My tuner can't see anything wrong with the GT3071R and can get me a good price including the flanges and adaptors and everything

lol it's all too hard.... *confused*

Now that we know someone has made 250kw @ wheels with a GT3071R on an RB20DET (other thread) with full boost by 4000rpm, we can agree that the GT3071R is a good unit?

I have a VG30DET housing, this can be machined out to fit the GT30 turbine wheel happily enough - and the GT3071R comes with a .5a/r TO4E compressor housing.... shouldn't this combination be able to fit down low easier than the GT30R low mount described in that other thread, and provide some awesome performance for an RB25DET?

It sounds like the GT3071R-WG (w/ cut down turbine) was a good combo for the RB20DET.

well, I currently am running a GT30r with a VG30 housing machined to fit.

Currently running 200rwkw at 7psi, lol. Still waiting FOR MY f**kEN INJECTORS.

lol anyway, I Will be sure to let you know how this goes.

The comp Cover is a .7

On an SR20 what boost are they most efficient at? about 1.1 bar or more?

The GT-RS is a little high for my liking. If you could strap one to an un-opened motor and get a safe 220rwkw at max efficiency or close to it, I think they would be an awesome option for street use.

Hmm I'm starting to look more into a GCG Hi-flow now..

I just want my 250rwkws dammit!! :)

dude,

the garrett GT3071R (external w/gate version) will flow enough air to make 250rwkw happily.

the comp wheel itself can flow up to ~450bhp, and the turbine is the 60mm GT30 wheel which flows ~500bhp easily.

the GT3071R with A/R .82 on an RB25DEt would be a killer combination IMHO.

good luck anyway.

I just took off 3071 internal gate turbo from my r32 gtst as it was shit... couldn't control boost kept going in excess of 22psi. Made good power up high 254 at 8250rpm. Dog under 4000rpm and only exciting from 5000rpm.

External gate on rb25 would be ok, internal gate - forget it. Rb20 forget it.

hows it feel on 7psi? N/A like? :rolleyes:

lol actually, the car is much punchier down low with this turbo, as it must be able to breathe easier because the turbine isn't creating as much resistance being a ball bearing.

and I said, 7psi = about 200rwkw... Its definately not N\A like... With a good launch, chirps all the way through second :)

I just took off 3071 internal gate turbo from my r32 gtst as it was shit...  couldn't control boost kept going in excess of 22psi.  Made good power up high 254 at 8250rpm.  Dog under 4000rpm and only exciting from 5000rpm.

External gate on rb25 would be ok, internal gate - forget it.  Rb20 forget it.

I'm running an internal gate. No problems here.. With the wastegate completely open, it makes a max of 3psi boost.

Edited by The Mafia

Mafia,

I found the same thing, upon fitting the larger turbo it has free'd up the bottom end, feels freeier and tends to free rev quiker also.

More off the line let the clutch out torque. :rolleyes:

What I meant by N/A like, so its not linear then? lags a little then hits solid and pulls?

What I meant by N/A like, so its not linear then? lags a little then hits solid and pulls?

Team america - f**k YEAH

hehe

yeah pulls harder off boost, but then catches boost and starts chirping in second lol

so yeah, hit boost and starts going like your mum - an animal

(hehehe jokes)

I wouldn't say its like na at all

Roy - I'd misread the full boost thing.... though he did say 14psi by 4000rpm, which is pretty decent spool, no? This is bearing in mind that RB20DETs don't spool turbos overly well, and need a few revs to go - I'd imagine (as Quincy said...) that one should go very nicely on an RB25DET.

Mafia - Do you know if there were any modifications to the VG30 wastegate port to allow it to hold boost like that? Are you using a Garrett supplied actuator with it?

I'd say you hit the nail on the head Cubes , if a turbine side is causing a major restriction uncorking it pays off . It makes me wonder if the small turbine and housing combination had some emissions benefit - sort of heat and a little forced EGR .

Notice how at times larger ARR turbine housings pull the cork out and unleashes a few ponies with no change to the compressor or cover . I guess it comes down to how well the sysyem was designed in the first place and its aims .

The combination I always wanted to see on an RB20 was the 25 exhaust housing on an otherwise std turbo , how much gained compared to how much lost . At least it should all fit and look standard .

The GT3071R (-23 CHRA) is biased toward exhaust flow turbine wise so may not need big housings to make it work depending on the desired state of tune and engine size .

Roy - I'd misread the full boost thing.... though he did say 14psi by 4000rpm, which is pretty decent spool, no?  This is bearing in mind that RB20DETs don't spool turbos overly well, and need a few revs to go - I'd imagine (as Quincy said...) that one should go very nicely on an RB25DET.

Mafia - Do you know if there were any modifications to the VG30 wastegate port to allow it to hold boost like that?  Are you using a Garrett supplied actuator with it?

no modifications what so ever to the waste gate port. And I am running the garret actuator with it.

No problems. With the gate fully open, the most boost it will make is 4psi, max.

I've got a GT30R To go on a RB20 and I am abit worred it is going to be to big and laggy???.

Specs are .7 front cover 58mm wheel and rear housing 0.63 56mm wheel.

Dont know why i was sold such a big front cover? and it is internerly gated,

Any one got any idear when it would come on boost and what have other people got on there RB20's, what kind of power will it make-230 or so on 1 bar?

It would be great if any one could help me out, Thanks

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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...