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get the part number between the two housings and someone will tell you what they are.

its not that hard to see you just need to be on the right angle

n1's are only 1300 each brand new

Edited by Angus Smart
I was able to get these pics, can someone tell me anything from these? Actuator looks stock (still trying to work out where my boost is being controlled from) Writing says Garrett AR .53 1-2 on it (are these stock R33 GTR units?) Included a pic of the compressor if that helps at all?

post-23873-1169777900.jpgpost-23873-1169780032.jpgpost-23873-1169780061.jpgpost-23873-1169780117.jpg

You have BNR34 housing there mate, R33GTR turbos are AR 42 not 53.

EDIT: - How is boost being controlled if the restrictor is still in place as I thought 9psi was factory and if the guage is reading +7mmHg then that's like 13.5psi?
Cheers

How do you know a) the stock restrictor is there and b) That you actually get 13.5 PSI?

You will have to put in a proper boost gauge ( one that you know is correct) and check boost with that. The stock boost gauge doesn't even have a scale .

Normal boost on R33 GTRs is about 11psi and when you have big exhaust and or bigger front pipes it can go up to 13-14 PSI.

As sewid mentioned you will need restrictors on the oil lines for any ball bearing turbo , DON'T overlook that , you may blow the seals.

im putting gt2560r-5 on my gtr,whats this oil restrictors ya talking about.i was just going to bolt them..will happen for sure blowing the seals if i dont??

cheers kane

sorry to hijack thread action dan

I'm not sure if your turbo kit has oil line restrictors with it or not, if not you will need them or you may blow the seals, I'm guessing you dont have a 34 because 34's have them .

HKS turbo kits come with restrictors and all gaskets you need to do the swap.

I know the restrictor is in place coz i have taken the hose offand looked at the little olive pip inside the line.

I'm not sure that it's actually 13.5psi but 700mmHg on that guage is approx 13.5psi and the guage reads 7 under full boost.

Yay R34 GTR turbo's, so they're ballbearing but still ceramic right?

Where am I looking to see if I have the restrictors?

I know the restrictor is in place coz i have taken the hose offand looked at the little olive pip inside the line.

I'm not sure that it's actually 13.5psi but 700mmHg on that guage is approx 13.5psi and the guage reads 7 under full boost.

Yay R34 GTR turbo's, so they're ballbearing but still ceramic right?

Where am I looking to see if I have the restrictors?

You cant be sure its the stock restrictor in the hose. They may have some sort of bleed valve maybe?

As I said before you don't really know how much boost you are running until you have it checked ( may very well be 13.5 but could be even 16? 12? who knows?

What other work was done on this car besides turbos? Maybe ajustable actuators ? Check with compressed air and a proper gauge to see at what pressure the actuators crack.

You can't see the oil line restrictors because they are in the oil feed lines, R34 GTR turbos are ball bearing and ceramic exhaust wheel.

I didnt say you have R34 GTR turbos, I said the AR 53 is 34 GTR turbo housing, for all you know they maybe hybreeds? They may well could be stock BNR turbos, you should be able to hear the turbos still spinning after you stop the engine if they are ball bearing BNR turbos .

There's no bleed valve anywhere I can see (doesn't mean one doesn't exist just can't be easily spotted).

The car is going on a dyno in the next week or two and I'll have some more conclusive numbers for everything then.

Besides turbos car has full exhaust, apexi panel filter, Impul chipped ECU, splitfires, iritop plugs and seemingly more boost as far as power mods go.

They could be hybrids yes, doubtful though I'd think. Where's the part number located so I can cross reference it.

To know what the turbo's spinning down after the engine stops sounds like I'd need a basis for comparison so can't comment on that.

Some of the top workshops and tuners both in Japan and Australia disagree with you.

hehe some.

its all personal opinions. nothing beats the power and simplicity of a big single.. screw balancing each turbo and matching them precisly.

anyway. N1 are a factory option.. they are designed withing the limits of the other support items. fuel...

  • 6 months later...

Geez guys way to dig up an old thread =D

I sold the GTR months ago!

For the record, I found that it had R34 GTR Turbo's in it - though still do not know what boost it was running. The new owner had it dyno'd (Dyno dynamics, shootout mode etc) and it made 247.5awkw's with a pretty rich mixture - he's got a PFC and some Cam gears to go in it shortly and will try and find out boost when he runs it again (have the sheet if anyone is interested).

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