Need Opinion. Buying A Turbo. Can I Change The Turbine Housing Myself ?

[robots]

Hey, guys !

I want to confirm one thing. I plan to buy a gt2860rs turbo from one place. And I found a shagged hks 2530 turbo. I plan to use its rear housing.

So can I unbolt the t25 rear housing from gt2860rs and get the 2530 one on there ? Do I have to balance that thing ?

Or I can't do this myself and have to get some turbo shop to do it ?

Thanks!

[tridentt150v]

You can change the housings easy and being both HKS should line up no problem. It won't affect the balance, but I'm not sure about the fan sizes vs the housing sizes.

Someone else will answer that better than I can.

[paulr33]

i would imagine the snout hole wont match up, so backpressure will be lost around the larger snout hole

[robots]

We need discopotato3 here! I'm pretty sure I read his post about 2530 being the same. What if I just swap the HKS cartridge out ?

[discopotato03]

Ears burn .

Yes the DP GT2860RS turbo and the HKS GT2530 use the same turbine so the turbine housings should be interchangeable .

The GT2860Rs and 2530 are very similar cartridges , if anything the RS turbo may have a slightly more modern compressor wheel . Both are 60.1mm OD compressor wheels but the inducers are fractionally different as are their trims .

From memory the 2530's compressor is 63 trim with ~ 47.7mm inducer where the 28RS is ~ 47.4mm and 62T .

Double check your GT2860RS's ID tag numbers because Garrett make two very similar cartridges (CHRA) with the real disco one being 446179-66 and the GTR upgrade version being 446179-51 from turbo assembly number 707160-5 .

The -51 CHRA also uses a 60.1mm 62 trim compressor but its exducer tip height is less than the -66 versions wheel .

If your Disco Potato Turbo is an original unmolested one it should have had a 0.86 A/R T28 (T25 same) flanged GT28 turbine housing . Some people wuzzed out and ordered the smaller ratio T28 flanged 0.64 housing , sadly (and stupidly) HKS only had their T3 flanged GT28 turbine housing made in 0.64 A/R .

I don't have my bibles with me ATM but I think the 2530's cartridge number is 446179-21 .

Confirm details tomorrow , cheers A .

BTW GT2860RS turbo part no is 739548-1 .

Edited July 15, 2008 by discopotato03

[robots]

So tell me one thing, disco. What garrett p/n should I order to get the right gt28rs to fit inside hks .64ar housing ? I think its that .64version, right ?

And if I assemble it by myself, will I have any issues down the road ? Because, there is this guy who assembles turbos and he says, that they should be balanced once assembled. Cartridge balanced, and 2 housings balanced with the cartridge.

Really hope I can get some more info on my dilemma.

[robots]

Here are the pics of the RB specific HKS2530 I've found on the internet. And you can see the cartridge tag pretty clearly.

What I'm thinking is if I would be able to slot the gt2860rs cartridge inside ? Or maybe there is a Garrett alternative available already ?

Thanks!

Edited July 23, 2008 by robots

[R31 POWER]

OT but does anyone know what dump pipe gasket that is??

[discopotato03]

Well the theory being that both the "GT2530" and GT2860RS are both GT2860R cartridges they should interchange in any turbine housing intended for the generic GT25BB style center section - provided they are profile machined for the same turbine family/trim .

I can almost see the confused looks over this GT25/GT28 terminology but there is an answer .

HKS got into the BB scene early and at that stage all the small turbine turbos were called GT25xx .

Going back a few years Garrett changed their turbo description system in an attemp to avoid confusion but the new system is not perfect and there is also the old and new systems to wade through .

At this stage most people consider the 54mm turbine size to be GT25 and the 60.1mm one to be GT28 .

The actual centre section meaning bearing housing and bearing pack is said to be the generic "GT25 BB" sized center section and covers most of the ball bearing turbo range from smallest (GT2554R) up to largest (GT3582R) , basically the guts excepting the wheels/compressor backplate/both housings is the same .

I did once read that there was a very slight difference on the depth of the step or register where early GT3037's located in their exhaust housings but it's the only example I can think of that any variation ever existed . The fix was a very simple lathe operation so not a biggie . I read it years ago on some US board .

OT again , the 60.1mm compressors is the "60" part of GT2860R or RS , the "30" part of GT2530 I understand means 60.1mm GT30 series compressor (don't confuse with the GT30 turbine family) .

Old speak - GT2530 means "GT25" 53.85mm NS111 turbine in 76T + GT30 compressor in 63T .

New speak - GT2860R means "GT28" 53.85mm NS111 turbine in 76T + 60.1mm comp in 60/62/63T .

So a GT2860RS cartridge should go straight into a 2530's turbine housing , from memory 2530's (except the KAi) version used the same type of comp housing (T04B 0.60 A/R) as a GT2860RS if intended for an RB engine app . The snout was machined off and a 4 bolt flanged adapter tube was fitted to the front to get its barb size down to the same as an RB20/25 turbo so std inlet plumbing fitted .

Capable turbo mobs or a machinist could sort this one out for you , cheers A .

If you don't go with the shagged 2530 let me know , I could use some bits off it if the price is realistic .

Cheers .

[THENIG]

Here is the best pic of the serial number i have of my 2530 Kai if its of any use.

You may have some difficulty finding a gasket to match, maybe GCG??

Just a pic of the flange on the dump pipe that came with it and the turbo flange it mates up to if its of any interest.

[RaZ_TuRbO]

what sort of power are we looking at by using the disco potato with the .64 as opposed to the .84 rear? can i get a i.d number on both please disco?

Sorry to hijack thread robots..

[robots]

Here you go, comp cover.