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Hey all

Just a quick question. I've recently bought a brand new gt3540 and i noticed the compressor housing looks different to other garrett turbos ive seen before including other gt3540's. All the others had the a/r stamped on the compressor housing and had a rather smooth surface. My turbo compressor housing doesnt really have anything on it and the surface is a lil rougher. I had a look on the garrett website and the picture of my turbo on the website looks the same as mine so i'm not overally worried but i admit i still am a lil as i've never seen another with the change. Has anyone come across this before or know of any change in the casting process?

cheers

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did you buy it from slide performance? i got mine from them and mine was identicle to urs (also a gt3540) so i took it to my tuner and he identified it as an genuine 3540 but with the old comp cover.. i got slide to polish mine up free of charge :(

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yeah mine is exactly the same as lthlrb. No chance of getting mine polished, Sliding performance have been nothing but a nightmare with my experiences but i know the moderators wouldn't appreciate be bad mouthing their biggest trader so i wont say anymore than that

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Kemp, who fancy drilled those covers, not Mr Turbo jobbies are they?

Cheers

nah they arnt mr turbo job's

u see the 2nd turbo from the left?? thats mine :D i'll be puting that on my GTR but B4 it goes on the GTR im gonna put it on the 180 and gas it and see if i can crack into the 400rwkw mark with a SR20

the turbo's full custom the compressor housing was machined by ATP over in the states and the exhaust housing is a custom in-house casted exhaust housing

its a T4 flange and its divided aka twin-scroll/spit-pulse A/R .70 <----- thats right its not a typo .70 u guys have any idea how responsive thats going to be and it will also have enuff top end to make over 400kw

the housing can not be bought from garrett because garrett dont even make them

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LoL, you couldn't resist, like a kid with a new toy at show 'n' tell :D

The SR setup should be wicked, good luck man!

*waits for Disco to come sprinting over, all frothy mouthed and sweaty palmed over the TS setup*

i seriously cant help it aye

my mate made more power then me and i wanna blow him away so im gonna up the turbo and gas the car just to make it in the 400kw mark which has been done with the SR20 B4 but ive neva done it so i may as well

the GTR project will have to wait the 180 is more important to me right now

Edited by STR8E180
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nah they arnt mr turbo job's

u see the 2nd turbo from the left?? thats mine ;) i'll be puting that on my GTR but B4 it goes on the GTR im gonna put it on the 180 and gas it and see if i can crack into the 400rwkw mark with a SR20

the turbo's full custom the compressor housing was machined by ATP over in the states and the exhaust housing is a custom in-house casted exhaust housing

its a T4 flange and its divided aka twin-scroll/spit-pulse A/R .70 <----- thats right its not a typo .70 u guys have any idea how responsive thats going to be and it will also have enuff top end to make over 400kw

the housing can not be bought from garrett because garrett dont even make them

Just to clarify are you talking PULP?

Or, which i suspect, on non pump?

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i got mine polished because it was ugly, had a burr mark and crap on it.. got it polished thru slide, as i wont be happy and say "oh na its ok i payed 1700 for a turbo and its not what i like" f**k that. I would have gone to the extent and flown over to see jason myself.. and made him change the cover or polishd it. simple.

ill post a pic of my turbo when i find a pic :)

also the manifold wasnt the best, rob hadto do some fab work to it, cut it and move the turbo away from the head, cut the external wastegate flange off and reweld a new one in from the side just under the flange. so it looks different to how it is when we dummy fitted it.

Edited by LTHLRB
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  • Latest Posts

    • Legend. I ended up finding the facebook account of the owner of the first car i sent but sadly he deactivated the account. I think you’re right in saying it’s some sort of well done custom job. Really appreciate your help anyways.
    • Totally equivalent. Stock often goes from the comp cover because that's where the actuator is also installed and the factory needs 2" of hose to make the connection - and it comes as a pre-assembled unit. They totally have a boost reference from somewhere between the turbo and the throttle(s). Oh, jeez. Just do it in M12 then. We don't actually care that much. I would expect any such AN converter fitting to rely on an o-ring or some other seal onto a flat surface under the flange of the hex**, because bolt threads are no intended to provide a pressure seal. unlike..... pipe threads. **which also requires a suitably flat and smooth surface on the turbo's boss to provide the seal.
    • I also used NP   That’s were it’s seems to be the best place to fit it? All schematic shows also that it’s should be referenced from the turbo housing. But idk, I do see high hp cars without any connection or anything to their turbos, so I really don’t know how they connect their things
    • I do have loctite 243 and 246 and a few more models. I could drill it now in place and make new threads for m12 and order an4 - m12 coupling and fit that to the turbo. Run a braided hose to the EBC which I could get a an4 to 1/8npt 
    • So M12 and sealant should be fine?    NPT ” because that’s what I had and what I could get atm. 
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