GTT or GTS25t ser.1/2 turbo

[Bass Junky]

That's what they do.

Has more to do with increased exhaust gas temp than anything else.

[Cubes]

Agree'd.. Its got nothing to do with the nylon compressor wheel.

EDIT: And they don't fail that often.. Sure they are a little more easier to break than the RB25 turbo. Its the same as how the RB25 turbo is easier to break than the RB20 turbo.

[ed]

R34 GTTs have a higher static compression than the other motors.

They do?

I thought 33 and 34 ran 9:1?

[eharrald]

The late model R34 GT-t (Sept. 2000 ~) have a different turbo than the earlier R34s.

There are actually 6 different turbos that came on the GT-t, depending on the year and transmission. Manual and automatic cars have different part numbers.

The early production 98 ~ 99 cars have a composite compressor wheel and ceramic turbine.

The mid production cars (early 99 ~ Aug 2000) have metal compressor wheels and ceramic turbines.

And finally the late production cars (Sept. 2000 onward) sometimes referred to as Series II have a still different turbo. These “Series II” cars have a Garret T25 with metal compressor and steel turbine.

They have awesome spool up, mine runs about 90kPa (stock boost level) and is at full tilt by about 2800rpm. I am getting ready to put an HKS upgraded actuator on it in the hopes that it will hold full boost to redline. They seem to loose a bit of boost after 6000rpm.

[ed]

Do you have a part number for the late production turbo's?

[eharrald]

Do you have a part number for the late production turbo's?

Let me check my FAST program when I get home.

[eharrald]

Do you have a part number for the late production turbo's?

Here is the Nissan P/N for the late model R34 GT-t turbo assembly with manual transmission.

14411-AB000

[Abo Bob]

Interesting that you say the turbos are different for different transmissions. Do you know what the differences are?

I have a auto/tiptronic so I'm curious. (7/99)

[eharrald]

Interesting that you say the turbos are different for different transmissions.  Do you know what the differences are?

 

I have a auto/tiptronic so I'm curious. (7/99)

You know I really don’t know what the difference is between them. My guess would be turbine trim or housing A/R. I have never seen any of the early or mid production turbos up close.

I did find the production year stats though.

Early: 07/98 ~ 10/99

Mid: 10/99 ~ 08/00

Late: 09/00 ~ 06/01

My earlier figures were a bit off sorry bout that.

[dojobi]

This site is great for finding out the differences between the R34 series.

http://2style.net/r34sedan/

it's in Japanese btw, so some of you will probably have to use the Babbling fish.

EDIT:

If you're having trouble finding the differences section, it's here -

http://2style.net/r34sedan/hikaku/hikakutop.htm

[eharrald]

This site is great for finding out the differences between the R34 series.

http://2style.net/r34sedan/

it's in Japanese btw, so some of you will probably have to use the Babbling fish.

EDIT:

If you're having trouble finding the differences section, it's here -  

http://2style.net/r34sedan/hikaku/hikakutop.htm

Great site but a couple things are a bit off.

Probably just quirks in Nissan's production process, even my car has a couple odd-ball parts that supposedly came on earlier cars.

[dojobi]

Yeah I think they sometimes experiment on batches of cars. e.g. the R33s - the series 1.5s are a bit of a lucky dip in what you get out of the series 2 parts bin.

That site is for sedans, not coupes, so that might explain some of the differences. That said, the site probably has quite a few mistakes.

[R34GTX]

I own a 00/08 GTXT. Is there any easy way to find out whether my turbo has metal/metal and ball bearing fitted??

I have tried to use the Fast Program but can't seem to find the details. If you can shed some light on the Fast program, it would be appreciated too.

If it's any help my car is ER34-040586.

Thanks in advance.

Great site but a couple things are a bit off.

Probably just quirks in Nissan's production process, even my car has a couple odd-ball parts that supposedly came on earlier cars.

[eharrald]

I own a 00/08 GTXT. Is there any easy way to find out whether my turbo has metal/metal and ball bearing fitted??

I have tried to use the Fast Program but can't seem to find the details. If you can shed some light on the Fast program, it would be appreciated too.

If it's any help my car is ER34-040586.

Thanks in advance.

The easy way to tell if you have a “Series II” turbo with steel turbine is look at it.

If the compressor housing has “Garrett” cast into it you have the steel turbine, if is has “NISSAN” cast into it you have a ceramic turbine.

For what it is worth I have never seen a late model 25GT-t (new style front bumper and silver faced speedo cluster) that did not come with a steel turbine.

One thing I don’t know is if they are ball bearing, I doubt it but you never know. I can’t find any documentation on it.

I will check your chassis number tonight on FAST to double-check.

[Abo Bob]

I think they will all be ball bearing.

[R34GTX]

I think they will all be ball bearing.

Thanks for your info, eharrald and Abo Bob. I will have a closer look at the turbo to check for the Garrett stamp.

It would be great to find out via the Fast Program. If you do find any info in FAST I would be interested to know exactly how you found it; what steps you went to through to extract the details.

Thanks again.