GT2559vwho wants one?

[Benjamin]

turbine housing A/R.64, compressor housing A/R.61
compressor inlet diameter 65mm / outlet 45mm
turbine inlet diameter 42mm / outlet 46mm

did the oil supply/outline from your blown gt1749v wise down or can you turn it some degrees? (with normal turbos i know the supply need to wise up, outline/exit-oil down,  if the degrees are wrong, the beering will blow in a time, normal tolerance is about 15defrees to each side with the 'normal' turbos)

i wanna see that socket/flange from your supply/outline from the oil

Greetz, Benjamin

[2446]

thanks for measuring, I thought it would be bigger but it's a good stating point.
The oil supply/return is a simple flat flange on which 2 steel tubes are brazed, the oil supply tube has a banjo fitting at the other end and connects directly to an oil supply port on the engine block, the return dumps into the block at the very bottom end and is connected with a rubber hose. The lines are vertical but I don't see a couple degrees off being a problem.
The center cardridge and turbine housing can be rotated, when I did it I just had to drill two holes, one for the roller pin that indexes the position, and one for one of rollers of the vanes ring control that was in the way of the actuating finger. Once you open it up it all makes sense  :wink:

[Benjamin]

is there a gasket between the flange for the oil and the turbo?
(and between the coolant flange and turbo?)

yea, rotating is easy if you got the worktools, its not my first opened vnt  :wink:  its much bigger than a gt2052v wich i got.

i believe you can push this turbo till 300hp on a 2.4, alltough, i dont know what is the max nominal pressure for this unit.

Greetz, Benjamin

[2446]

Yes, there were gaskets on both mating sufaces. Original ones were some kind of multi-layer metal but I've successfully used custom-cut cardboard too
The engine head will have blown a long time before 300hp  :lol:

[Benjamin]

those max15° off is what a guy who working in a turbo rebuild shop told me.

Greetz, Benjamin

edit: its max 30° to each side, but its not the best, you better go for 0° !!!

[allessence]

How did the Vnt 25 work out for you? there has not been any updates? Thanks J

[shadowmaker]

Hi,

i was searching with my buddy for Garrett GT2559v turbo's. This IS the biggest Garrett VNT turbo!

Nope. That's really small Garret VNT turbo. I have few REALLY big ones like GT42vnt. it weights 40kg and it's good for 600-700hp on diesel. I also have smaller GT37vnts and GT32vnts to play with.

Here's GT42vnt. This one is going to my friends 3,0L V6 gasoline dragracing car.





We have also project with MB300td 12-valve with modified GT37vnt. Aim is 500hp and torque seems to be unbelievable.

[allessence]

Okay, so there are bigger ones. What size VNT would equal a Garrett TO3?

Any ideas? I figured it was about the size of a 25? Did Garrett make a 28vnt?


I'm in the USA and they don't offer very many VNT's as stock units.

thanks

[OM617]

Can you post pictures of that GT32v?

[Benjamin]

oke guys, i did my first drive with my pump turned back (maybe about 60hp or so), it pulled 0,5bar/7psi with the vanes somewhere between closed and open. i believe it will not be to much lag.  

but...
i made a flange with the connections for the oil supply & out.
it was a normal flange with a metal gasket between (i made this myself, with the same matrial like the manifold gaskets -not copper- but dark grey gasket-.
...so oil was leaking between it, not very much i think but enough to damage this turbo, it was like brand new, now it have medium or even large play  :x  :x  :x  :x  :x  :x  :x



does anyone know how the OEM flange + gasket looks like? or so
i know some other vnt turbo use this same flange, any pics or so.

i hope someone can help me

Greetz, Benjamin

[jimfoo]

Maybe you can machine yours to take o-rings?

[Benjamin]

i wish i could use a kind of adaption becouse if i ever need a new turbo its less work. thats the reason why i wanna see the OEM flange.

i you look good to the picture you can see how the previous gasket problebly looked like, maybe gasket with copper o rings in like a headgasket is build?

Greetz, Benjamin

[2446]

I've seen gaskets from both "paper" and "metal sandwiching o-rings" style. You need to make sure your flange is super flat, it can warp a fair bit during welding. I don't think your flange/ gasket could have leaked enough to prevent turbo lubrication ? Maybe it's just broken in from a tight rebuilt ?

[Benjamin]

ok, its not broken, but just a little bit more play on the shaft, but still good, i was in a bad mood yesterday  :oops:

tomorow i go to the shop for the original gasket.

2446: thanks to reply my post  :wink:

Greetz, Benjamin

[Benjamin]

today i just ordered a couple OEM gaskets in the Saab garage. tomorow i will have them. it was like 1,33€ or so.
i also asked price for the OEM piping, its about 250-300€ for those  :shock:  i also have a picture from it now, i post it soon.

Greetz, Benjamin