R34 Gtr N1 Turbos Specifications....

[J-Boy]

Does anyone have the specifications of the R34 GTR N1 turbos? Like how much hp are they rated at, A/R etc?

Cheers!

[2443]

R34GTR standard Turbo is C100/GT25, Compresor is A/R0.53, Turbine A/R is 0.48. R34GTR N1 Turbo is C106/GT25, Compresor A/R is 0.60, Turbine A/R is 0.64.

[J-Boy]

Thanx alot!

[Guest Mashrock]

R34GTR standard Turbo is C100/GT25, Compresor is A/R0.53, Turbine A/R is 0.48. R34GTR N1 Turbo is C106/GT25, Compresor A/R is 0.60, Turbine A/R is 0.64.

there is actually more to that also. there are not just one set of r34n1's

i think a larger set than mentioned. which is actually bigger then hks 25/30's

[J-Boy]

Well i've read that they are ball bearing turbos as well yeah...anyone else also running 34GTR n1 turbos care to share abt at wot rpm does their boost really start to hit? And who's running 3" or 3.5" exhausts, any insight on the difference? Cuz im thinking of moving down from 3.5" to 3" cat-back.

[paulr33]

have a look in the rb26 turbo upgrade thread, its probably already been covered. and why would you move down in exhaust size? are you trying to make less power ?

[J-Boy]

Well i was thinking of downsizing cuz my exhaust is way too loud, i'm running mines stainless dumps, titanium split fronts which eventually come into a single 3.5", then a full stainless welded cat-back custom race exhaust. There is no mid muffler after my cat-back and i've also got tomei poncams as well, car just sounds very loud. It's all welded and the only flanges are at the cat.

[Beer Baron]

R34 N1s for all purposes come in two types. both have a .64 rear housing. some have .48 comp, some have .60 comp. dont ask me why or how, but i have seen both with my own eyes and both were ball bearing, both were steel wheel and both were claimed to be R34 N1s.

[2443]

There are 3 types of BNR34 N1 turbos. AA401, AA402 and AA403. All specificiatios are same, but AA403 is better for others because NISSAN and Garrett modified it.

[Guest Mashrock]

Well i've read that they are ball bearing turbos as well yeah...anyone else also running 34GTR n1 turbos care to share abt at wot rpm does their boost really start to hit? And who's running 3" or 3.5" exhausts, any insight on the difference? Cuz im thinking of moving down from 3.5" to 3" cat-back.

well i have boost starting at about 2200, and full by say around 3200, but i would think if your running something using afm's it would be a little blunt. i also have not driven for a while so this may not be exact. but the thing is as sharp as a knife very very responsive.

and i am running a veilside exhaust, i think its 3.5 inch. but it flows very very well.

if you want to quiten down an exhaust they are called mufflers. they do wonders. i have three rather large ones and you cant hear much at all.

[paulr33]

why would it be blunt if using afms?

[Guest Mashrock]

the gtr just seems a little less responsive while using afm.

thats just what i have found after driving two with similar modifications.

[Busky2k]

More likely due to the way they were tuned rather than the AFM vs MAP difference.

[paulr33]

spot on busty. if anything the afm tune would be better

[Guest Mashrock]

well i definatley put it down to that also.

but what i say is also true

[paulr33]

so youve driven a tuned afm setup and tuned map sensor setup and the map sensor setup felt better and more responsive? i dont see how that is possible... ?

[Guest Mashrock]

maybe its magic?

[J-Boy]

Well i am running a map sensor instead of afm now cuz of the fcon vpro, i can hear my turbos spooling at 2000++rpm and then power comes really hard at abt 3500 all the way till abt 8000 or more. I'm not too sure which 34 GTR N1 turbos of the 3 im using though, but i also have a OS triple plate and the response is fantastic. Hmmm mufflers...as in put in mufflers after the cat-back? Would any exhaust shop have them? Anyone to recommend a zorst shop in brissy? How much will the mufflers affect the flow? I was told to try using 3" resonators but then it's kindda weird to run 3.5 into 3 and then into 3.5 again?

[itbmils]

There are 3 types of BNR34 N1 turbos. AA401, AA402 and AA403. All specificiatios are same, but AA403 is better for others because NISSAN and Garrett modified it.

Yep - I have the AA403s on my R32 (with the .48 housing)

definitely N1's (I asked Nissan b4 I bought them)

definitely have steel wheels

definitely have ball bearing (keep rolling for a full 60 secs after I turn the car off )

come on boost @ about 3.5K rpm (I see 11psi by that stage)

I have split HKS style dumps feeding into full (cat-less) 3" system, and I see ~300awkw @ 1.2bar without poncams

They still have PLENTY of potential to go, I've herd of some guys pushing these to 22psi – but that may be the .60 housings

I still have the std 440cc injectors – which is limiting my output

HtH

[Guest Mashrock]

Well i am running a map sensor instead of afm now cuz of the fcon vpro, i can hear my turbos spooling at 2000++rpm and then power comes really hard at abt 3500 all the way till abt 8000 or more. I'm not too sure which 34 GTR N1 turbos of the 3 im using though, but i also have a OS triple plate and the response is fantastic. Hmmm mufflers...as in put in mufflers after the cat-back? Would any exhaust shop have them? Anyone to recommend a zorst shop in brissy? How much will the mufflers affect the flow? I was told to try using 3" resonators but then it's kindda weird to run 3.5 into 3 and then into 3.5 again?

well the computer is a great start. tho tuning for hks in brissy may be a problem..

i'm also unsure of which ones i actually run. i havnt had the chance to look recently i hope the larger set tho.

i think you can fit 3 fairly large mufflers under there. if you can get some decent high flow ones they would be great. 3.5 is a good size or 3 1/4

what exhaust is on there ar the moment?