Jump to content
SAU Community

Recommended Posts

Wow, this got confusing. So I searched garrett official website to get the measurements of a GT2860-9 and it turns out the GT2860-7 that GCG apparently have are the same measurements as listed GT2860-9 on the garrett website.. I don't know how that works but numbers shouldn't lie.. Right?

Edit:

The gcg -7 are the following:

Inductor- 47.2

Exductor- 60.1

That sounds like a -9 ?

Edited by hazjaz

Sorry guys, it wont let me edit the above post.

After a few more hours of reading through threads on this forum I have come to the realisation that the -7s are GT2860-7 (707160-7) and the -9s are GT2859R-9 (707160-9). Going off the stats on the Garrett website, the -7 is a bigger turbo? In that case why is the -9 the one with the better performance and able to push more power easier?

GT2860-7 (707160-7)

COMPRESSOR

Ind Whl Dia(mm) - 44.60

Exd Whl Dia(mm) - 60.10

Trim - 55

A/R - 0.42

TURBO

Whl Dia(mm) - 53.90

Trim - 62

A/R - 0.64

GT2859R-9 (707160-9)

COMPRESSOR

Ind Whl Dia(mm) - 44.50

Exd Whl Dia(mm) - 59.40

Trim - 56

A/R - 0.42

TURBO

Whl Dia(mm) -53.90

Trim - 62

A/R - 0.64

If anyone can clear this up for me that would be great, based on the read I have done -9 is the ones I want, but turns out they are actually smaller.. In which case -7 would have more potential?

Edited by hazjaz

http://www.skylinesaustralia.com/forums/topic/423175-r34-gtr-turbo-upgrade-needing-advice/#entry6811557

I know this will seem like you are going around in circles but the information has been given to you in a user friendly way.

The flow potential of the -9 is higher than the -7.

It really is this simple;

After 'response' on a 2.6 = -9 (330 rwkw or so or squeeze 350 + on E85 on a 'normal' setup) *350 plus on 98

If you can put up with a lethargic result for more top end (360-380) on a 2.6 = -5's.

Stroker = -5's

3.0 with a bulldog curve = -5's

-10's/RS's = in the bin.

*Well setup cars are the exception.

Thanks for the reply guys. I will be going for the -9s. I'm sure if I quote the model number and ask for the HKS GTSS equivalent I will be getting the right ones.

-7s seem a bit out of a waste of time unless you're chasing a replacement

Edited by hazjaz

Sorry guys, no edit button again for the above post. But after reading about the different sizes listed by garrett I went into the technical drawings and they look identical apart from the turbo outlet. Is the design of this the advantage of the -9s? Picking up the turbos tomorrow so just want to make sure 100% that I am buying the right ones.

-7

http://www.turbobygarrett.com/turbobygarrett/sites/default/files/default_images/turbogroup/drawing/Garrett_GT2860R_707160_7_new.pdf

-9

http://www.turbobygarrett.com/turbobygarrett/sites/default/files/default_images/turbogroup/drawing/Garrett_GT2859R_707160_9_780371_1_new.pdf

http://www.skylinesaustralia.com/forums/topic/423175-r34-gtr-turbo-upgrade-needing-advice/#entry6811557

I know this will seem like you are going around in circles but the information has been given to you in a user friendly way.

The flow potential of the -9 is higher than the -7.

That's right!

-7's and -9's have the same size in specs.

From memory when speaking to Racepace, the reason why the -9's have better top end is due to the configuration of the turbine blades.

Ones longer and the other shorter (the shorter blade allowing more air to flow through).

Also to do with the pitch angle of the turbine blades.

It's at a certain degree to allow more air.

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

    • That sounds like no chance of even importing one for road registering then Now I see why Duncan wants to check LHD rules for Targa...   I wonder how "bolt in" the AWD would be if you got one imported from the US and swapped it to an AUD one
    • Not to mention they drive like a bucket of bolts! yuck!
    • Ha ha ha, that's fair mate! We have the crackhead dogs now. Mainly because the missus wants the crazy dogs while she still has the energy and capacity to be able to keep up with them! Ha ha our current two are both Working GSD, there brothers and sisters (from the same litters) are in Police, Corrective Services, and I believe one did end up in defence force too. They're wild and fun, yet right now, both curled up asleep on the lounge room floor while we watch some TV. Mal is very likely the next dog (unless I get my couch potato guardian dog 😛 )   What are your Kitties names? Are you planning some house work, like those high kitty shelves, built in scratching post, and some cat passages from one room to another room?
    • Maine Coone, did look at but to big and fluffy As for performance dogs, we had Mals at work, performance dogs are fun to watch, but, way to much work for this old rooster
×
×
  • Create New...