Hks 2835 Pro S

[N I B]

I did one on monday on a forged RB25 with stock cams, managed 375rwhp but it needed good fuel for that with 360 being the best it would do on 98,360rwhp is around 420ps flywheel so im pleased then.

[Robo's]

Ive bought a Gt3071R which is the exact same specs as a 2835. Im installing it this week, will let you know how i go.

[gtst25]

http://www.skylinesaustralia.com/forums/in...;p=1742392&

It fits fine.

Cheers

[discopotato03]

Robbo yes you can buy a turbo from Garrett with the same cartridge but the housings , mainly the turbine side , let it down . If you get in quick and buy HKS's turbine housing designed for their GT2835 Pro S turbo you are 85% of the way there . The other essential difference is HKS's port shrouded compressor housing though you can get a Garrett version of this to suit your turbo . HKS would have used that style of compressor housing for a reason so a good chance it may suffer compressor surge without it .

Costs of component changes could be getting up to the region of the HKS as is .

Cheers A .

Edited November 20, 2006 by discopotato03

[discopotato03]

HKS normally rate their GT2835 Pro S turbo at 420 PS . I imagine you can't buy a 2835 Pro S with the larger .87AR turbine housing because of the lag factor given that a lot of effort went into getting these things responsive . At least they did do the .87 for those that wanted it though expensive not being able to go direct with that option . I'll do a brief GT30 UHP series turbine summary for those maybe not in the know .

1) Unmolested GT30 84 Trim - 60.0mm x 55.0mm .

2) Cropped GT30 90 Trim - 56.5mm x 53.6mm .

3) Cropped GT30 84 Trim - 56.5mm x 51.8mm .

No 1 comes in the real GT3071R , the GT3076R/GT3037 , the GT3040R and hateful GT30/TO4S options .

No 2 comes in a variant of HKS's GT2835R (T28 flanged .86AR) , and Garretts upsized "GT3071R-WG" .

No 3 comes in HKS's GT2835/R/Pro S and junior sized "GT3071R-WG" .

Brief he said ...

All these are squeezed into four cartridge or CHRA types which I'm gassing on about so that those

who want to mix n match know whats what .

A) 700177-0002 Cropped 84 trim turbine with 71mm 52 trim compressor .

B) 700177-0003 Cropped 84 trim turbine with 71mm 56 trim compressor , (see No 3 above) .

C) 700177-0004 Cropped 90 trim turbine with 71mm 56 trim compressor , (see No 2 above) .

D) 700177-0023 Unmolested GT30 turbine with 71mm 56 trim compressor , (see No 1 above ) .

Ok so thats the facts , if you want an integral waste gate and T3 flanged ex housing use either the HKS Pro S type (nothing available for 90T 2835R) on any of the above EXCEPT the real Garrett GT3071R seen above ie No1 and D . For this one you need the new Garrett GT30 integral gate type housing or HKS's version for their GT3037 Pro S . Do not bore out a HKS housing for the 2835 Pro S series because HKS moved the cartridge centre across which you can see if you have a pic of the GT3037 Pro S housing .

This whole business of boring or re profiling non native turbine housings very rarely ever works , it can if the native turbines trim is being increased but OD changes alter the housings nozzle . The only stand out I know of is the GCG Hi Flow and I hope to one day see an exhaust manifold pressure test but thats another story .

Fingers fried , cheers A .

Edited November 19, 2006 by discopotato03

[drgnball34]

I orderd my GT2835 with .87 a/r and turbineless kit. How much more lagger are we talking about when compared to the .6x a/r? Ive heard they are most affective at around 22psi but from the post ive read on here, it seems like around 19psi and they run out of puff. Im really hoping to crack the 300rwkw mark. I do have cams to help.