R34 Neo Turbo Choice

[Tonksy]

Hi all,

I have been researching off and on into what turbo choice to run on my R34 NEO. I have emailed a couple of tuners for advice and keep getting different ideas and power figures. To start this is what I currently have engine wise:

- 3" custom turbo back with race cat

- Power FC

- HKS intake

- Cooling Pro FMIC

- Greedy boost controller

- Split fire coils

- Z32 (not fitted)

The car will be kept to mostly street use with the occasional track day. I am after a responsive mid range (responsive) over top end power. I also want to keep the engine looking as stock as possible, since I get enough attention as it is. So my obvious choice was a high flow. I have read into and asked around about the Hypergear turbos but have seen mixed emotions about them. I have asked several tuners about their thoughts regarding their turbos and have been given negative feedback (I don't want to mention the tuners names on this forum). I have been given a quote from a tuner in Perth for one of their high flows at $1250 and looking at 350-370hp at the wheels when pushing them hard. I also have been looking into the GCG GTS-T's at $1955 with a slightly lower power figures. Both turbos are in my budget range but I'm not sure about pushing a turbo to it's limits to get the power out of them. I am hoping to get close to 450-500hp at the fly. Am I best to wait and save for something like a GTX3071R kit from GCG?

My other mods include:

- Pedders coil overs

- Slotted rotors

- Braided lines

- Brake stopper

- redstuff pads

- Half rollcage weld in

Cheers

[GTSBoy]

You can get to 450hp (fly) with a Hypergear highflow of the R34 turbo. Can also stretch that towards 500 with the bigger rear. Good response. Can't imagine that you'd go any other way given your stated aims and desires. Cheaper than everyone else's options, plus they will sell you any later developed upgrade options at very small prices.

[Tonksy]

Is it simply because the worshops I have spoken with are trying to sway me towards their more expensive high flows?

[34GeeTeeTee]

HG or Kando etc.... Been proven so many times on here.... Go through the RB25 thread, so many good results from so many big name tuners... The NEO is a killer engine!!'

[Tonksy]

I've been looking into the HG for a while now and have been keen on them, it's just the workshops being negative about them that has put me off. the PU.82 looks like it's probably the way to go for what I am after.

[GeorgesR34]

Is it simply because the worshops I have spoken with are trying to sway me towards their more expensive high flows?

Because they want to sell you one perhaps. HG build identical turbos for every one, the mixed results can only indicate some have better setup and tune. by following their feedbacks people don't initially getting what they want are getting around the target HP on the end. Also appears Stao is very skeptical about WA tuners.

I've been following the HG thread for few years and got one my self doing 280rwkws with no problems. you can get responsive 250rwkws with their R34 high flowed turbo no worries.

[KiwiRS4T]

Go the hypergear. Read the hypergear thread.

[Tonksy]

No worries cheers guys. I reckon the HP PU.82 is the way to go for me. Does anyone have any tuners in Perth that they would recommend?

[hypergear]

Since you've got a OP6 Turbocharger a standard high flow on stock housings can get you about 350rwhp mark with good response. Reference is at:

http://www.skylinesaustralia.com/forums/topic/261613-hypergear-hiflow-service-continued/page__st__6580

Alternatively you can pay bit more for the billet SS1PU high flow which comes with a larger .86 turbine housing and a stronger actuator. Power wise it makes around the 350rwhp mark with excellent response, wide power band and plenty of torque. reference to look at is:

http://www.skylinesa.../page__st__4460

Tuner is very important, I have recommendations in the east but yet to know any on the west. if you have a Nistune chip, I can forward you with a map for reference once work has been done.

[Tonksy]

No worries, I'm currenlty running a Power FC tho. Just a quick one, with the SS1 how does it compare to the SS1.5 response wise? I wouldn't mind going a little bigger so there is room for improvement later on. And at the same price, I don't really want to be doing things twice when I get more power hungry. Thanks

[GTScotT]

Dont mind the mixed emotions re the hypergear turbos. A careful read of this forum will tell you ALL turbos are a mixed bag for results.

The most raved about turbo of all time is the garrett GT3076R (3037 spec) and on this forum and all other OZ based forums there are as many good results as their are bad, a real mixed bag. Plenty of ppl making 300kw, plenty making 240 and anywhere in between.

The trick is in setting up your car right and not giving your tuner a nightmare to work with. A neat tidy and functional setup is best. I myself have gone a hypergear and was very careful with my setup. Like others I reaped the rewards.

The best thing for you to do is to consider A: how fast you want the car to go, B: how much power/response will be required to do that and then C: what turbo will achieve that result. The answer to A is entirely up to you, but the answers to B and C are within the dyno and turbo specific threads on this forum.

Good luck!

[WMDC35]

HG perfect for that power & looking stock?

[R31Nismoid]

Because they want to sell you one perhaps. HG build identical turbos for every one,

No, they are not identical.

The HG bearing case is journal, and this is where the ~$500-$700 price difference comes from.

Where the GCG (for example) are ball bearing case. Garrett Ball bearing cores are around the $1000 mark in that frame size, it makes sense +wheels/balancing +machined housings, makes sense they are then more expensive.

Also note that becoming a SAU-NSW member gets you 10% off GCG turbos

[Tonksy]

No, they are not identical.

The HG bearing case is journal, and this is where the ~$500-$700 price difference comes from.

Where the GCG (for example) are ball bearing case. Garrett Ball bearing cores are around the $1000 mark in that frame size, it makes sense +wheels/balancing +machined housings, makes sense they are then more expensive.

Also note that becoming a SAU-NSW member gets you 10% off GCG turbos

Thanks mate, I was wondering what the cost difference was for. What are the advantages of the ball bearing core? GCG quote that their high flows are good for 240-250rwkw at 18-20 psi which is a bit below my goal. If only I lived in NSW I would thanks mate, I've only just moved to Perth.

[R31Nismoid]

Have a read around the internet mate - You'll see the pro/cons and then make a call for yourself.

Something else to think about - 500hp (over 300rwkw) on a RB25DET doesn't seen to last forever, users slowly but surely running around those figures are seeing their 15yo motors fail.

So unless you plan for a rebuild, peg the power back a bit to 250-260rwkw/18psi and let it live on like many have for years with whatever turbo you select.

[GeorgesR34]

Ball bearing, bush bearing, or even latest CBB HG's doing, you can spend plenty of coins. No point spending 2G for $800 result.