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What Exhaust Housing Is This?

Rekin

By Rekin,
in Engines & Forced Induction

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Rekin Grand Master

Rekin

Posted
Posted

Hello,

Ive purchased a GT2530 turbo from yahoo auction which was listed for Skyline RB's.

It arrived yesterday and noticed that the exhaust housing was nothing similar to rb20/rb25...

I was wondering if anyone could identify the exhaust housing for the turbo so I can sell it.

If anyone wants it, you can have it for $900ono.

The little Garrett plate has seemed to be snapped off the turbo, so cant identify it with any model numbers..

It has a T3 flange, just the exhaust housing doesnt match up with standard rb20/rb25 dump pipe..

Hopefully someone can recognise it or it will become an expensive paper-weight :P

Cheers

Patrick

img1748mediumsc8.jpg

indexun3.jpg

img1743mediumar5.jpg

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https://www.sau.com.au/forums/topic/237440-what-exhaust-housing-is-this/
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BHDave Grand Master

BHDave

Posted
Posted

it's an early hks turbo (either 2530 or 2535) that used to be sold with a cast dump to suit an rb front pipe.

Very early 2530's came out this way, as did the old t3g's. I have seen the dumps first hand.

The outlet looks very similar to an IW t2 turbo so all is not necessarily lost. Just a bit more custom work....

discopotato03 Grand Master

discopotato03

Posted
Posted

Interesting that it has a "Garrett" housing on it - and you mentioned 0.67 A/R . Can you double check it to be absolutely certain it doesn't say 64 or 0.64 because Garretts usual T25/28 flanged GT28 housings are normally 0.64 A/R ratio .

Me wonders if the later HKS branded turbine housings were also 0.67 A/R because that would explain partly why some HKS spec turbos ie GT2530/GT2535/GTRS(GT2871R 52T) make slightly more power than even a very close spec Garrett market turbocharger .

I remember seeing a bush bearing turbo at Turbologic some years ago that used I think the same turbine and it had a "T3" flanged Garrett housing on it . Have to look closer into this as it may have the same turbine housing as that early HKS one in your pics .

If this is the case we may have stumbled upon the critical thing that allows us to mount GT28BB Garrett marketed turbos on RB engines and save a few bucks over expensive HKS units .

If there are any part numbers cast into that turbine housing of yours can you let me know and I'll chase it up .

Cheers A .

Ceffy_SA Collaborator

Ceffy_SA

Posted
Posted

Hey Rekin, as i said on NS.com im using the exact same turbo currently on my RB20, i bought it as a HKS T3G turbo with the stock cast dump pipe to suit it, bolted straight up to my RB20 and is making some very decent power on my engine with minimal lag for a RB20. Mine still has the ID plate on the turbo, i can get the numbers off it tonight if that will help anyone?

Rekin Grand Master

Rekin

Posted
  • Author
Posted
Interesting that it has a "Garrett" housing on it - and you mentioned 0.67 A/R . Can you double check it to be absolutely certain it doesn't say 64 or 0.64 because Garretts usual T25/28 flanged GT28 housings are normally 0.64 A/R ratio .

Me wonders if the later HKS branded turbine housings were also 0.67 A/R because that would explain partly why some HKS spec turbos ie GT2530/GT2535/GTRS(GT2871R 52T) make slightly more power than even a very close spec Garrett market turbocharger .

I remember seeing a bush bearing turbo at Turbologic some years ago that used I think the same turbine and it had a "T3" flanged Garrett housing on it . Have to look closer into this as it may have the same turbine housing as that early HKS one in your pics .

If this is the case we may have stumbled upon the critical thing that allows us to mount GT28BB Garrett marketed turbos on RB engines and save a few bucks over expensive HKS units .

If there are any part numbers cast into that turbine housing of yours can you let me know and I'll chase it up .

Cheers A .

Hey, very interesting to read, thanks for the info.

I found some numbers, let us know if they mean anything :mellow:

img1754mediumvt7.th.jpgimg1762mediumqv8.th.jpg

img1760mediumci2.th.jpgimg1765mediumqc0.th.jpg

The numbers on the side say something like;

M3

67

H4

558

Hey Rekin, as i said on NS.com im using the exact same turbo currently on my RB20, i bought it as a HKS T3G turbo with the stock cast dump pipe to suit it, bolted straight up to my RB20 and is making some very decent power on my engine with minimal lag for a RB20. Mine still has the ID plate on the turbo, i can get the numbers off it tonight if that will help anyone?

Hey, Would you happen to have a part/model number for the dump pipe?

If i can get a number, i could probably chase one up through HKS etc

Thanks :rant:

discopotato03 Grand Master

discopotato03

Posted
Posted

Something I forgot to mention was that generally Ball Bearing type "GT28" style turbine housings have six holes and bolts to clamp the crab plates onto the turbos center section (bearing housing) .

From what I can see yours has four and that sometimes means it's of a bush bearing type turbocharger , they possibly interchange so that could be one answer .

I'll have to look into the old TA/TB34 series turbos to see if they used that housing .

A .

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