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Hi Flow Factory R34 Gt-t Turbo

CK34GT

By CK34GT,
in Engines & Forced Induction

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CK34GT Enthusiast

CK34GT

Posted
Posted

Has anyone out the with an R34 high flowed their factory turbo?

I am weighing up my options between high flowing my factory turbo for $1600 or buying a larger ball bearing turbo for $2500 - $3500

I know with the larger turbo's comes alot more lag, but does high flowing the factory turbo give a much greater increase in power?

I really don't know a great deal about turbo's, any info would be great

Thanks guys

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https://www.sau.com.au/forums/topic/166816-hi-flow-factory-r34-gt-t-turbo/
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CK34GT Enthusiast

CK34GT

Posted
  • Author
Posted

Is it safe to raise the boost after high flowing the factory turbo?

I have booked the car in next week to fit a Hybrid FMIC and install an APEXI AVCR boost controller, my mechanic advised not to run more that 13-14 psi.

What do you think a safe psi level is on the mods i am about to get?

Andi Experienced

Andi

Posted
Posted

You could raise it, but just abit. You'll end up hitting the stock ECU's saftey mechanism (rich and retard) when it detects too much airflow via the AFM. So you'll be maxing out your injectors and afm as well.

You're mechanic is wise, run no more then 12psi for constant acceleration. Any higher and the stock ceramic turbine wheel will fly out into your exhaust, 13-14psi may be okay for quick burst only.

If you're after a turbo for good power and decent responsiveness then hiflow is the way to go. Anywhere from 230-260rwkw and full boost from anywhere between 3000-4000rpm depending on the turbo/setup/etc. The HKS bolt on option are good as well, have a look into them. Theres a few for sale atm. HKS GT2530, GT2535, HKS GT-RS etc.

I know its been said before alot of times but seriously do a search, there were 2 threads asking the same question not long ago.

http://www.skylinesaustralia.com/forums/in...howtopic=166028

http://www.skylinesaustralia.com/forums/in...2&hl=hiflow

http://www.skylinesaustralia.com/forums/in...5&hl=hiflow

Andi Experienced

Andi

Posted
Posted

Oh forgot to mention that you should at least have these parts to fully take advantage of your new turbo

- stand alone ecu/computer

- turbo back exhaust with a good cat

- boost controller, electronic one better (AVC-R is good)

- fmic (good since your getting one)

- decent fuel pump, like a bosch

- injectors, nismo make 480cc, sard make 650cc and up

- afm, either a Q45 or Z32 one

And perhaps:

- Tomei poncams

- Splitfire coil packs

Don't forget to upgrade your brakes and suspension as well. No point having all that power and to not be able to use it properly.

CK34GT Enthusiast

CK34GT

Posted
  • Author
Posted

Thanks Andi you have been a massive help.

I will search topics before starting them in future too, lol.

One more question, as the FMCI and Boost Controller is being fitted next week, what would you suggest to be the best bolt on mod?

Andi Experienced

Andi

Posted
Posted

Next mod I'd do for your car would be fuel pump and to look for a Power FC. You'll definately need a PFC (or some other form of aftermarket management) if you want to fully utilise your new turbo.

I've already got a HKS GT-RS on the way, but I won't be putting that on to much later. I figured I'd like to get all supsension and braking mods done and then fully utilise the standard turbo first before bolting up a bigger turbo. Your car would be a nice street weapon even with the stock turbo if you get decent suspension (shocks/springs/coilovers, swaybars front and rear, front caster kit, front and rear caster kit, pineapples/subframe cradle bushes) and some nice brake pads as the stock 310mm rotors and calipers of the GTT are fairly good from factory.

Andi Experienced

Andi

Posted
Posted

Whoops I forgot to mention what I've got done to my car atm.

- 3" SS split dump

- 3" SS hiflow cat

- 3.5" trust cat back

- apexi pod

- K&J tube and fin fmic with 2.5" piping

- greddy profec b 2

- bosch 040 pump

- power fc

Goes really well and once I get the PFC tuned for those mods it should be even better and should keep me satisfied for a few months before having to bolt on my new turbo. I just think its a waste if you go straight to changing the turbo when you haven't fully explored the limits of your standard one, who knows thats just me though. :thanks:

G_Force Community Regular

G_Force

Posted
Posted
Nice mods, must go hard, have been trying to find a new Power F.C out there but with no luck? Any idea where i can source a new one?

Also, what mod do you feel made the biggest difference?

The Power FC will be ur next best mod and its sumthing u'll need for a hi-flow, can be hard to find these days but guess wot, just saw one for sale by Slide in the Traders section, be quick.....

satanic Grand Master

satanic

Posted
Posted

I'm running a R34 High-Flow from Sliding Performance...

We managed to pull 250rwkw from 1 bar (automatic transmission) so that was quite an effort. For under $1000 delivered for the turbo; you can't really go wrong, especially if you're after a sensible / streetable level of power.

Other supporting mods apply:

Full Exhaust

Fuel Pump

Injectors

Cams (optional)

FPR

Air Filter

Head Gasket

ECU

blah blah blah...

As Andi has said though; suspension and braking is a key component that has to be looked at... without them you won't be able to effectively / safely use the power to be gained.

For a list of my mods; visit my site - it's a little off, but it's pretty much the setup for thet 250rwkw.

Thanks

Stan

MANWHORE Grand Master

MANWHORE

Posted
Posted

If you want to get a highflow, and don't want to have your car off the road while you send it to gcg/precision to highflow, i've got an rb25 turbo that i'm lending aroudn to sau members to use so they dont' have their car off the road while the turbo's being highflowed.

I'm in sydney too. if you want, my number's 0403 211 482.

highflows are very good. good response and have potential to put out lots of power proviiding you've got all the supporting mods..

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