Did i buy -5 turbos or Garrett N1 equivalents- Confused

[djvoodoo]

In the process of having my engine built (Rb26 on a GTR) - Forged Pistons rods etc, and with 9.0.1 compression. Bought what i though was -5 turbos, but now re-looking at the tag Im not so sure?

The Tag is GT2560R 707160-5

Comp housing is stamped with .60, rear is the normal .64

I've heard that the GT2560R is the re-tagged GT2860, but also appears to say that a 2560R is a Garrett equivalent 14411-AA403 OR it could be a -7

GCG turbos have that tag ID as the -7

https://gcg.com.au/Turbo-Charger-GT2860R-AKA-7-Nissan-Skyline-GTR-RB26DETT-G836026-5004S.html?ref_cat_id=26

And the below site has the GT2560R as part of the Nissan "replacement" range.

http://www.capa.com.au/prices_turbo.htm#turbo_garrett_medium_frame_ball_bearing

Anyone have some knowledge on the old tag numbers?

Edited May 17, 2020 by djvoodoo

[r32-25t]

.60 compressor housing says it’s a -5 

[djvoodoo]

13 minutes ago, r32-25t said:

.60 compressor housing says it’s a -5 

Didn't a version of the 34 N1 also have a .60 housing as well though?

 

[djvoodoo]

For anyone wondering, did a bunch of searching around these GT2560R's. They do look like the larger 34N1 equivalent with the .60 comp housing. So not as big as -5 or HKS2530, almost an in between between -9 and -5?

Some people say Garret just rebranded and changed to 2860 instead of 2560, some say it's a difference between OEM vs aftermarket. 

Found an old comp/turbine map someone posted on SAU back in 2013.

I have -9's currently, and here's hoping these will outperform in overall power with similar response to -9s... (looking for 360kw on 98 on a built motor with 9.0.1 comp)

[GDZ32]

I had these on my R32 GTR. Definitley smaller than the 2860-5's I have on my R34 GTR. They're a great turbo, mine made 340wkw at 20psi on 98Ron on the RacePace dyno with a built 2.6 and Tomei drop in cams

[djr81]

Which version of the drop ins do you have? A or B?

Oh and good to see a dyno chart that is not a single and is on petrol. 👍

Edited November 24, 2020 by djr81

[jmknights93]

3 hours ago, djr81 said:

Which version of the drop ins do you have? A or B?

Also interested.

[discopotato03]

From memory the GT2860R , at times known by the original part number 707160-5005S , is more like what HKS called the GT2530 . 

Old news now but back in the day (1991 odd) the GT25xxR ball bearing turbo reference related to all with GT25 and GT28 turbines .

So the HKS spec "GT2530" actually has the GT28 76 trim turbine , same as your GT2860R 707160-5005 units .

The main difference is the compressor which is 60 odd mm 63 trim , and 62 trim in the -5005 ones .

From what I can gather the "-7s" look more like a GT2560R and appear to use the slightly smaller and different style 53mm 62 trim turbine , also the 60 odd mm 60 trim compressor . I think I found a reference and an OE Nissan like part number for the -7s so could be the R34 N1s . They would have been an upgrade on the std R34 GTRs ceramic turbine units .

All these are old part numbers now and could have all changed over to the 8mm type turbine shaft and G series style ball bearing cartridge .

The older Turbo By Garrett catalogues covered most of these except the HKS specific turbo and cartridge numbers but I have old lists from years ago if anyone wants part numbers . 

At the end of the day I'd err towards the "2530" or the 707160-9s given a choice because at least they were developed to suit RB26s . Garrett made the HKS spec BB turbos and could not initially sell these units or cartridges for some years . So they decided to market units similar but not quite the same .

Cheers , A . 

[GDZ32]

Type B drop in cams. 260° intake and exhaust with 9.15mm lift. Stock R34 GTR crank which was a new item, Eagle rods and CP Pistons in a N1 block. The motor was built in 2009 too. Was a good setup with the gearing on the 32. A bit laggy in a hairpin but otherwise really good. Plus made decent power on a safe 98 tune so cant complain.  

[djvoodoo]

I have since sold these, but there was alot of confusion. I emailed Garrett and was told the GT2560 IS the -5. I can also confirm that the turbine exducer is 47mm, the same as the -5. The -7 turbine exducer is 5mm smaller.

[discopotato03]

Well whoever you emailed at Garrett is wrong .

That pic shows a GT28 NS111 turbine in 76 trim , inducer around 53.8mm and exducer around 47mm .

Also have a look at the pics of the turbine maps above and the associated details .

If you think I am wrong look up the specs of the GT2860RS and GT2871R series turbos , these and a few others all use this same turbine - well turbine wheel anyway .

The basic GT25 turbine should measure approx 53mm  and is 62 trim .

The term GT2560R is a generic one . It breaks down to GT for Garrett Technology / 25 for the turbine series / 60 for the compressor OD / R for rolling element ball bearings . There are many variations in housings and compressor wheel trims . Honestly the best way is to search for cartridge numbers because the details will show turbine and compressor dimensions .

A . 

[djvoodoo]

2 hours ago, discopotato03 said:

Well whoever you emailed at Garrett is wrong .

That pic shows a GT28 NS111 turbine in 76 trim , inducer around 53.8mm and exducer around 47mm .

Also have a look at the pics of the turbine maps above and the associated details .

If you think I am wrong look up the specs of the GT2860RS and GT2871R series turbos , these and a few others all use this same turbine - well turbine wheel anyway .

The basic GT25 turbine should measure approx 53mm  and is 62 trim .

The term GT2560R is a generic one . It breaks down to GT for Garrett Technology / 25 for the turbine series / 60 for the compressor OD / R for rolling element ball bearings . There are many variations in housings and compressor wheel trims . Honestly the best way is to search for cartridge numbers because the details will show turbine and compressor dimensions .

A . 

I emailed both Garret (USA) and GCG. They both said the same thing, that it is a-5 and the tag association of GT25** and GT28** is somewhat of an argument.

Not saying you are wrong man, just going off the *experts* advice and the physical measurements i did of the compressor inducer and the turbine exducer using verniers.

I put them side by side a set of HKS GTSS turbos and i can say that the 2560 was noticeably larger in every way and matched the -5 specs.

Here's another thread with a brand new turbo marked as 2560:

 

 

Edited November 25, 2020 by djvoodoo

[discopotato03]

If you are speaking about RB26 spec GTSS turbo dimensions then that is correct 

Just for another layer of confusion there was also an SR20 spec version of the GTSS but it had the larger NS111 53.8mm 76 trim version of the GT28 turbine . Same as your turbos had .

Back to the RB26 style GTSS turbos . These use a cropped version of the GT28 NS111 turbine so they'd measure 53.8mm 62 trim . The smaller trim means they have a smaller exducer and outlet diameter than the 707160-5 turbos .  Also to these part numbers . Often on the turbos ID tag there are inconstancies . For example one of these turbos may have 707160-5 , another identical one may have 707160-5005 . Often people , and Garrett , quote turbos by a dash number ie -9 or -7 or- 5 . It makes life difficult .

Anyway the best way I can describe GT25 and GT28 BB turbos is by their turbine dimensions and their number of blades .

11 blades can mean GT25 OR GT28 turbines . The 53mm outside diameter ones are GT25 . The 53.8mm outside diameter ones are GT28 . The GT25 11 bladed turbine is generally 62 trim . The BASE model GT28 turbine is also generally 62 trim .

The GT28 NS111 9 bladed turbine , remember - GT28 turbine 53.5mm OD ,  comes in two trim sizes . Most were 76 trim BUT there was a special version in 62 trim for specific applications . Note that this NS111 62 trim turbine has almost exactly the same dimensions as the 11 bladed GT28 turbine - 53.8mm OD 62 trim .

As far as I know the cropped 62 trim NS111 turbine was only available in two turbos , firstly the  RB26 style GTSS/707160-9/707160-5009 (all same) , and secondly the GT2854R .

I found a link to details of that GT2854R and they kindly have pics of the differences between the GT2554R and GT2854R turbines , totally different 11 and 9 blade forms .

https://turbochargerspecs.blogspot.com/2011/03/garrett-gt28r-gt2859r-56-trim-310-hp.html

Cheers A . 

[discopotato03]

Sorry people bum steer , that link was to details of the GTSS/GT2859R .

https://turbochargerspecs.blogspot.com/2011/03/garrett-gt28-gt2854r-270-hp.html

This one should take you to the GT2854R and note the second and third pics of the turbines .

A .

 

[discopotato03]

GT2560R note turbine dimensions .

https://turbochargerspecs.blogspot.com/search?q=GT2560R

[discopotato03]

And here's the details for the GT2860R - the 707160-5 version , again note the turbine dimensions and trim .

https://turbochargerspecs.blogspot.com/search?q=GT2860R

A .

 

[GDZ32]

Discopotato knows what's up

[NZ-GTT]

I recently bought a set of twins which are advertised as -5's but on the turbine housing it is stamped 0.48 A/R yet advertised as 0.64, Anyone know what's up with that? Here's the box they came in:

 

[discopotato03]

This is a link to a more recent Garrett catalogue and the unit of that turbo part number .

https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/gt2860r/

It doesn't look like the part numbers mentioned above because these have an updated center section and bearing pack than the earlier GT/GTX gen 1 units .

I'd take it up with the supplier .

[NZ-GTT]

I'm not too fussed about it, I just thought I would add to the confusion. Physically these -5 turbine housings look to have a bigger snail when compared to stock R32 turbos but definitely have 0.48 A/R on them.