Garrett Showing New Gtx Turbos .

[discopotato03]

Hi all , I stumbled across this at Evom net and dif a few searches to confirm . This is a link to ATP and shows a few compressor maps ie the GTX2863R , GTX2867R and a comparison of a GTX2863R and GT2860RS compressors . Note the caption for the GTX2876R is a typo and should read GTX2967R - you'll see if you expand it .

http://www.atpturbo.com/root/releases/release110101-1.html

Note the port shrouded comp housing in the pics .

Elswhere there's mention of a GTX3576R and some of the much larger 55 series as well .

Its significant that some of these later GTX variants are 63 and 67mm OD because thats where some of the extra flow capacity comes from ie it isn't just because of the GTX blade count and profile .

It remains to be seen if the GT28 turbines can keep up though in a Utube vid of Garrett at Sema this year there's mention of twin scroll T3 flanged GT28 turbine housings on the way . Get down on your knees and pray they have twin integral wastegates like the GT30 Evo ones do because this would give these turbos a huge lift in performance affordably .

Watch this space , cheers A .

[Lithium]

The GTX2860Rs, and maybe GTX2863Rs may be interesting in twin form on GTRs - I could see the GT2863R being quite an interesting thing on an RB20 if you can get them with a T3 flange turbine housing.

I don't see the point in the GTX3576R, personally - there has already been an overlay of a GT3082R and GTX3076R which ended up pretty much identical. The GTX 76mm compressor doesn't flow as nicely overall as the GT 82mm compressor, and seems to be overall no flasher in terms of bringing on boost so really it sounds like an expensive downgrade to a GT3582R. I'd be happy to see it prove to be an incorrect evaluation, but it sounds like the answer to a question no one asked.

The GTX2860R and the GTX55 are probably the most exciting prospects here I think - instead of having fun with all these new compressor wheels etc, I think they should look more into providing quality twin scroll turbine housings and make use of the fact that Borg Warner have made big promises which they've not delivered on... if they can fill those gaps they may keep themselves in the game.

[GTScotT]

The biggest shame in the EFR failure to date is the exhaust housings, as Lith said Garrett need to focus more on that.

Im getting tired of seeing comp maps climb exponentially for the sake of a few Lbs of flow.. Its like we are having new products come out and saying 'the power of a 3071 with the response of a 2871'...... In reality we will need to build motors to accept unacceptable boost levels to match a result that a trick exhaust housing could have done to an old hat product at an acceptable boost level.

Honestly.... Meh. As an end user not looking to build a motor any time soon these new products are bleeding boring. There is definitely a market for them but it is definitely not focused on the average owner/driver.

In Lith's example, interesting to see them on a GTR, all well seeing as there are housing constraints at play, yet we are definitely talking BIG power and a BIG budget motor. These products arent going to yield some magical 350kw result.. I see these changes are a bleeding of the colours from the old hat 400 and 500kw targets. We may turn -5s (and some) into -10s in terms of response and power, a bleed across from the two (read somewhat -5 response with -10 power). Still not something we all want to rush out and buy as -5s are already enough to pop a stock motor let alone at 3 bar of boost.

Le sigh. New product fail.

/end rant/

[T04GTR]

food for thought. on our race car. we went from gt 2860rs to gt2871 51mm (x2) and gained only 4kw. going from 3.0L to 3.5L it actually went backwards with more boost. wich to me says the thurbine wheel is already at a choke point..

[Lithium]

Hmmm people definitely normally make more with 2871Rs than GT2860Rs - did you do anything to headwork with those changes?

[Piggaz]

What sorta power was that Dave?

[GTScotT]

Interesting and valuable info there Dave, helps even me with my build

May I draw everyones attention to the RB25 dyno thread.................... An interesting result in comparison to others of late. Once again seems to be an accumulation of parts rather than just the turbo...

[Ryan1200]

After experiencing back pressure issues with standard hks 2530 on my 26 i never thought the -10 or Gtrs were worth even considering.. -5/2530's ftw

[smithy85]

About time!!! GTX28 Woooo!!! This will open a whole new can of worms for those of us with GTR's.

No product catalogue info on the Garrett site as yet - keeping the eyes peeled though!

[Piggaz]

After experiencing back pressure issues with standard hks 2530 on my 26 i never thought the -10 or Gtrs were worth even considering.. -5/2530's ftw

. This man knows!

[bigmikespec]

After experiencing back pressure issues with standard hks 2530 on my 26 i never thought the -10 or Gtrs were worth even considering.. -5/2530's ftw

Exactly.

So these turbos just have a higher flowing compressor wheel? I guess it has the word of the week in the sale pitch ("billet") so they will probably sell lots of these to people. It would need the surge slotted compressor housing considering a larger compressor wheel with the same turbine side would be more prone to surging...

[Ryan1200]

A few pm's from hypergear turbos some months back concerning upgraded turbine wheels on the 2530's

Good day:

Thanks for your email. the 2530 runs off GTRS turbine wheel which can flow up to around the 450hp mark.

I believe the reasons that you can’t hold more boost would either be the comp wheel can not satisfy engine’s air consumption at the specific boot level. The wastegate is too small. And Turbine housing is too small.

So you can run 71mm comp wheel or we can make a set of billet 60mm wheel and machine out your current internal gate with a larger flap see if that works better, if not we will have to go for larger turbine housing or larger turbine wheel which will affect the GTR’s response by much.

Good day:

The 2530's already felt laggy on the Rb26det, The next size up is the GT30 turbine wheel, we can grind it down in trim which will pickup better response but I'm not too sure what that would be like running as a twin on a GTR thou..

Good day:

You will really be looking at the GT3071 / 76 cores. those are around 1400AUD each from Garrett Australia, but I'm more then happy just machine your housings if you want to supply your own core as you can get them for almost half price from US.

We charge $110 for each housing to be machined. And Also if you've got the anti surged housings we will need to measure up the surge grove to the lower blade of the new comp wheel.

Just need someone with 2530/-5 to take the plunge and try a cropped GT30 exhaust wheel as above and use the HTA 68 front wheel and hope for the best! If its to laggie 3ltr it!!

[Ryan1200]

Exactly.

So these turbos just have a higher flowing compressor wheel? I guess it has the word of the week in the sale pitch ("billet") so they will probably sell lots of these to people. It would need the surge slotted compressor housing considering a larger compressor wheel with the same turbine side would be more prone to surging...

I dont think it will be as bad as the 71 wheel because the "billet" wheel does its magic up top when the motor can consume it!

[N1GTR]

Mmm thats tempting, VERY tempting to try out.

Always wanted twin highmount power but never went through with it due to not looking stock. So, if they're direct fit to stock position that changes the game.

Did you ask for an estimate on twin 3076 rwkw by any chance?

[Ryan1200]

Ok N1 id be willing to donate $100 towards some high flow twin setup development.. If we could find another 19 member we could put a large dent in the initial outlay? Would be nice to keep them in true direct bolt on loosing that would suck! We could name them after the forum something catchy like -5AU. LOL

[D_Stirls]

Personally I'd like to see these new compressors fitted to cropped 56.5mm GT30 turbines rather than GT28 NS111 turbines. The cropped turbines can still be fitted into T2 housing but the extra flow means that they might just allow the compressors to hit their straps. From what I have seen I agree with what others have said in that the 71mm compressor it slightly choked by the hot side so trying to flow more through the same housing/turbine is slightly a step in the wrong direction.

I'd like to see what a cropped GT30 turbine fitted to 52 trim 71mm compressor would go like, should allow the full potential of the GT-RS compressor to realised.

Edited November 10, 2011 by D_Stirls

[Lithium]

How have you guys established that its the turbine side which is choking them?

Could always go to T518Zs if GT28s aren't enough, a lot easier

[GTScotT]

I will have my T518Z (kando dynamic) results up within a week. Will post to the Kando thread, will be on an SR but comparisons should be fairly relative.

I have to say, so far the T518Z SR shits on a GTRS SR........ And I am expecting it to make the same if not more power. I cant see why anyone would pick a GTRS over a T518Z given housing constraints werent an issue.

D_Strils depending on how this current T518Z adventure goes I may approach Stao about making my 2860RS into something more. The aim would be to lose as little response as possible but get it up to 270kw.

[Lithium]

Will be interesting to see TD05 > GT28... I'm trying to hold it in, but I think GT28s have no place on RBs. If people want >400hp, they should have a decent single. If you want less than 400hp, toughen up

[zebra]

hmmm after reading both this and the EFR thread...Im going out to spoon my T78