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Standard Gtr Garrett Turbos Rb26 Are They Standard

GTR Grey Ghost

By GTR Grey Ghost,
in Engines & Forced Induction

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GTR Grey Ghost Enthusiast

GTR Grey Ghost

Posted
Posted

Hi Guys and Gals, bought these turbos second hand however they appear to have different exhaust wheels than that of a mates R34, these have more fins on the exhaust, how can I tell if they are metal or upgraded wheels?

Here are some photos

post-64397-1266139090_thumb.jpg

post-64397-1266139116_thumb.jpg

GTR Grey Ghost Enthusiast

GTR Grey Ghost

Posted
  • Author
Posted
i magnet comes to mind to test for metal...

Cheers mate, did not think of something as simple as a magnet, turns out that the exhaust wheel is definately ceramic as with the nut holding it together, what are your thoughts about fitting these out with metal wheels and 360 degree thrust bearing?

Can I then run a couple pounds boost above the 1 bar currently?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Hi there, can you elaborate, "a bugger if non ferrous metal" ?? cheers

non-ferrous metals are not magnetic.

They are just trying to correct me about my magnet comment :)

However, given we are talking turbos (without inconel and so on), the magnet is applicable as stated.

discopotato03 Grand Master

discopotato03

Posted
Posted

A few thoughts based on what the RB26 people tell me .

I understand that the "steel" turbine generally used to flick the ceramic one is the GT28 62T 9 bladed one . Not as fragile as the std ones but nevertheless a slightly larger higher flow capable wheel .

The thing to remember when doing this is that with less resistance to exhaust flow the turbines response gets a little lazier and you don't have the lower oil shear drag advantages of annular contact ball bearings to compensate .

The simple truth is that ball bearing cartridges are more responsive with the same wheel combination but the wheels need to be sensibly sized too .

Durability wise ball bearings win hands down , hardened balls running on hardened races with small point contact areas .

Given a choice I would not put bush bearing turbos on an RB26 , if you damage them the sheer work involved in R&R makes them uneconomic in the long run .

These 707160-9 AKA GTSS turbos I reckon are the ones to use and its good knowing that someone at HKS spent time and money dialing in a specific turbo to be powerful and responsive in a specific car/engine application . They are not a Garrett generic maybe . Smart cookies developed this combination .

It's unfortunate Garrett doesn't appear to want to sell the cartridge used in the 707160-9 turbo because an economic upgrade may have been to have the std turbos housings machined to suit this BB cartridge .

Anyway it looks expensive initially but for a "sorted" turbo that you can buy at a Garrett price I think they are hard to beet , short of losing oil pressure or something foreign smashing the wheels these should live a long and healthy life .

Response cautious people like them and I don't think I've heard anyone say they didn't work better everywhere that the std turbos while being more responsive everywhere as well .

Extra functionality and durability - bargain I reckon .

Cheers A .

GTR Grey Ghost Enthusiast

GTR Grey Ghost

Posted
  • Author
Posted
A few thoughts based on what the RB26 people tell me .

I understand that the "steel" turbine generally used to flick the ceramic one is the GT28 62T 9 bladed one . Not as fragile as the std ones but nevertheless a slightly larger higher flow capable wheel .

The thing to remember when doing this is that with less resistance to exhaust flow the turbines response gets a little lazier and you don't have the lower oil shear drag advantages of annular contact ball bearings to compensate .

The simple truth is that ball bearing cartridges are more responsive with the same wheel combination but the wheels need to be sensibly sized too .

Durability wise ball bearings win hands down , hardened balls running on hardened races with small point contact areas .

Given a choice I would not put bush bearing turbos on an RB26 , if you damage them the sheer work involved in R&R makes them uneconomic in the long run .

These 707160-9 AKA GTSS turbos I reckon are the ones to use and its good knowing that someone at HKS spent time and money dialing in a specific turbo to be powerful and responsive in a specific car/engine application . They are not a Garrett generic maybe . Smart cookies developed this combination .

It's unfortunate Garrett doesn't appear to want to sell the cartridge used in the 707160-9 turbo because an economic upgrade may have been to have the std turbos housings machined to suit this BB cartridge .

Anyway it looks expensive initially but for a "sorted" turbo that you can buy at a Garrett price I think they are hard to beet , short of losing oil pressure or something foreign smashing the wheels these should live a long and healthy life .

Response cautious people like them and I don't think I've heard anyone say they didn't work better everywhere that the std turbos while being more responsive everywhere as well .

Extra functionality and durability - bargain I reckon .

Cheers A .

GTR Grey Ghost Enthusiast

GTR Grey Ghost

Posted
  • Author
Posted

Hi there, thank you for taking the time and providing me a solution with another brand over Garrett, however without disregarding what I have learnt here can you advise me if there is any Garrett Turbo Charger as a direct replacement over standard which would provide minimal lag and alternative over HKS etc The question may be asked why........? the only answer being I want to keep the old girl fairly original (a change for me) as in original brand name parts to achieve a better result and achieve reliability. Turbo's to still be Garrett, what would the model number should I source, appreciate your help, cheers

discopotato03 Grand Master

discopotato03

Posted
Posted (edited)

Grey Ghost the 707160-9 is made by Garrett for HKS , all HKS do is get them from Garrett without the Garrett wastegate actuator and supply their own higher rated ones .

707160-9 , Garrett turbo for a Garrett price .

Why better than std units ? More modern wheels and a lower friction longer lasting bearing system .

http://www.turbobygarrett.com/turbobygarre...9R_707160_9.htm

A .

Edited by discopotato03

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