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Hks Gt2530 Vs. Garrett Gt2860 -5

cobrAA

By cobrAA,
in Engines & Forced Induction

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cobrAA Mentor

cobrAA

Posted
Posted

I thought these turbos were very smiliar, based on the same trim. However, I was going to pull the trigger on GT2530 and then my friend came to me and said that the -5 is actually rated at 360hp while the gt2530 is only 320hp.

can you please shed some light on these 2 ratings?

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https://www.sau.com.au/forums/topic/409688-hks-gt2530-vs-garrett-gt2860-5/
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Piggaz Grand Master

Piggaz

Posted
Posted

Same rear housing, turbine wheel and comp cover. There is 1.1 mm difference in the comp wheel, the 2530 being the larger of the two.

See if Elrodeo666 gets in here and tells you what HKS said themselves about these two.

discopotato03 Grand Master

discopotato03

Posted
Posted

Don't have time to search the part numbers but if you are comparing a "GT2530" to a GT2860RS in RB26 housings then yes cartridge wise the only difference is minor variations in the compressor wheels . On paper the RS is a 62 trim 60.1mm OD wheel where the 2530s is a 63 trim 60.1mm wheel .

Its not just all in the inducer size and exducer tip heights will make a difference .

Also I think HKS does their own turbine housings but not sure if there is any significant difference internally , both are 0.64 AR .

If you want the original chico roll and can find used ones to freshen all you need is the HKS supplied turbine housings compressors and compressor housings .

You could also inquire about buying the HKS spec cartridges from Garrett because sometimes they can supply HKS spec cartridges . You would have to check but from memory the cartridge number is 446179-21 .

A .

cobrAA Mentor

cobrAA

Posted
  • Author
Posted

What size engine is it?

What are you doing with the car?

2.6.

I'm doing spirited drive and drag mostly. I pretty much maxed my gt-ss so I decided it was time to go a step higher.. I will ask my tuner to play with timing so hopefully we can turn a little the powerband to the left and I might add a carbon shaft to try to get ake it as responsive as my actual setup but with the topend of these.

discopotato03 Grand Master

discopotato03

Posted
Posted

I notice one thing people never do with GTSS turbos is experiment with the next size up compressoe housings . I don't remember exactly the dimensions of the GT2859R compressors but they are not exactly tiny in the GT25/GT28 world . I think Garrett intended GTSSs to use a housing very similar if not the same as std turbos and it was intended to help make these turbos wind up early - or earlier than your typical GT2860R turbo .

GTSSs use the same RB26 specific (compact type) 0.64 AR turbine housing as most Garrett 26 type bolt on turbos and the main hot side difference is the 62 rather than 76 trim size of their NS111 turbines .

Once you step up from an RB26 specific GTSS to a GT2860R type turbo you get the larger compressor housing and the larger trim turbine .

Something to research is the four cylinder version of the GTSS because it uses the big or 76 trim NS111 turbine but its compressor is a 60.1mm 60T rather than the 62/63 trims of the GT2860RS/ "GT2530" compressor wheels .

A .

cobrAA Mentor

cobrAA

Posted
  • Author
Posted

I spoke to a local turbo shop and they offered to convert my gt2860-r to the spec of the RS or even the gtx2863r.

I understand what your means and your advice are great but I think I rather work around the -5 than the gt-ss. aybe I'm wrong but I think this way will be easier than the other way around.. not to say that the gt-ss have a good resale value.

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