Turbo Upgrade On R34

[shnaped_second]

Im looking into getting a bigger turbo on my R34, i was looking at a GT2835 and they seem to be the way to go, im chasing around 350-400rwhp, nengun have them for around $2500, does anyone know where i could get one at a better price or any other options for turbo's?

Cheers

Brad

[cameron]

HKS 3037 may get you their easier with out having to run lots of boost.

Depends on if you like good response or a little lag?

nengun are good with prices.

[Lithius]

A GCG hi-flow will get you there I think? Only $1750 too... Apparently they are good for a bit over 350rwhp. That's the option i'm going for with my 34.

Edited October 8, 2006 by Lithius

[pixel8r]

I've got a GT30 in my stagea s2 (same engine/turbo as r34) and with a 3" exhaust it goes really well. Not sure of its upper power capabilities but I know its slightly higher rated than the GCG hiflows.

I'm in SA and went to Adelaide Turbo Services. Great work and great advice.

Its got very little lag and quite good pull throughout the rev range, but then I'd only have between 120-140 awkw at the moment so not really the sort of power you're looking for...but I know this turbo can deliver some good numbers.

Others have had great results with the gcg hiflow as well.

Definitely do the research and talk to a turbo expert. Its not necessarily what is the better turbo but what one might be better suited to your setup (or planned setup).

Hope this helps

[infected flow]

2835 pro s will do that easily -- 18psi should get u there with tomei cams

[shnaped_second]

Thanks guys, there are 4 different versions of the 2835 on nengun,

HKS GT2835 Pro S Spec 56T A/R 0.68 T3 Flange Strong Actuator Attached 100mm Diameter

HKS GT2835 Pro S Spec 56T A/R 0.87 T3 Flange Strong Actuator Attached 100mm Diameter

HKS GT2835 Pro S Spec 56T A/R 0.68 T3 Flange Strong Actuator Attached 80mm Diameter

HKS GT2835 Pro S Spec 56T A/R 0.87 T3 Flange Strong Actuator Attached 80mm Diameter

Which would be the most suitable for me?

Cheers

Brad

[discopotato03]

Matter of taste but I'd get the .87AR turbine housing version for an RB25 and definitely the Neo version since the better VCT should help pull the bottom end up a bit . I'm not 100% certain but it looks like HKS intended the .68AR housing for RB20's and the .87AR one for RB25's .

Cheers A .

[tridentt150v]

I'd check out what Slide has to offer as well, garrett has just updated their turbo line up, you could get a GT3076 for under $2000.

[wolverine]

for the HKS 2835 pro s don't forget you want to buy the kit not just the turbo as you will need all the paraphernalia to go with it.

[Abo Bob]

Actually don't do that because the kit only comes with the 0.68 rear housing and the 0.87 is much better.

[infected flow]

Actually don't do that because the kit only comes with the 0.68 rear housing and the 0.87 is much better.

i agree with adam.

but personally id go the 3037 pro s

cheers

Edited October 10, 2006 by infected flow

[gtt23]

whichever way you decide let us know how u go ...

am looking at upgrading turbo on my 34 in the near future also

john.

[Haines]

whichever way you decide let us know how u go ...

am looking at upgrading turbo on my 34 in the near future also

john.

Me too

I was recommended the gt3037r by GCG

but a little out of my price range at the moment

[shnaped_second]

Hey, was looking at 3037's on horsepowerinabox.com, 2k for one seemed pretty appetising but i heard these dont bolt up but they say they can get an exhaust housing to fit straight up? can anyone shed some light on this?

[gtst25]

Actually don't do that because the kit only comes with the 0.68 rear housing and the 0.87 is much better.

Hi fellas,

Not too sure about the 0.87 rear housing being much better than the 0.68 - I had a chat with Grepin a few months ago when he went from the smaller 0.68 to the 0.87. Power went from 312rwkw to 320 with a bit of loss midrange. Looks like the 2835pros maxes out @ 300ish kw - no matter what you do it runs out of puff.

If you want 300rwkw it'll do it but don't expect much more.

Not too sure about what difference the 80-100 actuator will make - if it helps I got the .67 kit with 100 mm actuator. Also of interest both Grepin and I have problems keeping the wastegate shut - mine peaks @ 22psi then blows the wastegate open and boost falls to 17psi. Grepin got a higher tension wastegate spring and that helped a bit.

Something else I found a bit annoying with the kit was the wategate actually hits the dump so can only open a fraction.

Apart from that it fits up great with minimal headaches - the only thing we had to make sort of was the afm to hks intake pipe - we just cut down the factory rubber intake and it looks fine - a nice and factory look.

Cheers

Edited October 10, 2006 by gtst25

[Busky2k]

I'd go the HKS 2835/3037S Pro S because its internally gated which means less mess.

Also the 100mm front housings are meant to be better on the 3037.

I think with gtst25's statement, its really the compressor thats holding back the turbo from making much more power. Time to step up to the 3037.

[Kaido_RR]

2835 pro s gets my vote

i make a lazy 251rwkw (337rwhp) with 11 flat afr...

but get the KIT, its so much easier with the kit its directbolt, also you DONT need a gasket for the turbo to dump pipe. i spent a few weeks tring to get incontact with hks etc to get the gasket and in the end hks reply with "the HKS GT2835 PRO S DOES NOT need a gasket at all"

ohh im not sure how the 3037 does with lag, but i dont really notice it that much with the 2835 i get full boost between 3000 and 3500rpm

[infected flow]

what ..!

the biggest down fall of the 2835pro s is the fact that its internally gated...it doesnt stay shut above 18psi...these turbo's are meant to be efficent to 1.5bar .

the most i could get was 1.3-1.4

[Kaido_RR]

what ..!

the biggest down fall of the 2835pro s is the fact that its internally gated...it doesnt stay shut above 18psi...these turbo's are meant to be efficent to 1.5bar .

the most i could get was 1.3-1.4

im running 16psi without a problem and i was told turbo was most efficent @ 1.2bar or something like that

[shnaped_second]

So where to purchase a 2835 kit?

Cheers

Brad