Turbo advice? R32 Nismo vs R34 N1

[BakaGaijin93]

Okay so looking for a bit of advice here, as I'm new to the whole Skyline thing and relatively new to owning a vehicle with turbos as swell.

I've owned my R32 GT-R since for a few months now, and wasn't able to get much info about the vehicle from the previous owner. I've been buying parts for a while with the intention of turning boost up to around 1.3 bar and running E85. So far I've gone with a Walbro 255 pump, ID 1000cc injectors, and Haltech Platinum Pro ECU. So here's where I'm at now: I mistakenly assumed the car had stock R32 turbos, and purchased a set of R34 N1's (AA403) that only had 20,000km on them. Well in the process of removing the turbos currently on the car I discover that it was actually equipped with R32 Nismo turbos (06U00).

So I guess my question would be are the Nismo turbos worth keeping on the car? I know they support more power but they're journal bearing design vs the bb R34 N1's and I'm guessing have a bit more lag. If I were to keep the Nismo turbos I definitely think I'd need to get them rebuilt. I've tried to do research but haven't found anything directly comparing these 2 turbos. Just looking to hear some thoughts from people that have experience with either turbo, and which ones would be the better route to go. Let me know what you think!

Thanks!

-Nick

[steveo1502]

http://homepage.ntlworld.com/tbroom/Turbos.htm

Says the Nismo are good for 600 ps and the 34n1 are good for 500 ps.... Although sounds like u already have a nice build, u need a nice manifold, and efr single

[matthewc72]

Nick,
I don't have an answer for you on the turbos but am on a similar build path as you Haltech Platnium pro, Haltech E-85 module, Haltech boost module and WBO2, 1000 cc injectors, supporting fuel pump with the exception that I am swapping to Tomei 7655 Turbos and plan to run Tomei headers, Tomei Turbo outlet pipes, HKS Y-Pipe, and Tomei TI exhaust. I am curious to see how your build process goes. I am still in the parts collection phase.
Matt

[BakaGaijin93]

http://homepage.ntlworld.com/tbroom/Turbos.htm

Says the Nismo are good for 600 ps and the 34n1 are good for 500 ps.... Although sounds like u already have a nice build, u need a nice manifold, and efr single

The fact that they make more power like this is what has me wondering if I should keep them. And yeah that would be nice!

Nick,
I don't have an answer for you on the turbos but am on a similar build path as you Haltech Platnium pro, Haltech E-85 module, Haltech boost module and WBO2, 1000 cc injectors, supporting fuel pump with the exception that I am swapping to Tomei 7655 Turbos and plan to run Tomei headers, Tomei Turbo outlet pipes, HKS Y-Pipe, and Tomei TI exhaust. I am curious to see how your build process goes. I am still in the parts collection phase.
Matt

Will definitely let you know! I'll just be running the stock exhaust manifolds though, trying to set aside funds for a vacation to Japan and for this car at the same time is hard lol. However the rest of the exhaust should flow well with HKS dumps and a Veilside equal length front pipe on the way. What kind of power are you hoping to make btw?

[dustyGTR]

Where do you live? E85 is hard to come by in Western Canada, as far as I know we only have 1 fuel station in West Van that sells it.

[matthewc72]

Nick,
I'm shooting for around 450- 500 at the wheels but am building so that if I want more I won't have to buy all new everything to meet the next power goal, lol

Dusty,
Nick and I are both in the US where E85 is pletyful at least I know it is in Colorado.
Matt

[bobbo]

If it helps I'm running R34 N1s at 16.5psi. The car makes 427whp on 91 octane.
I really like the response and for what I do with the car that's essential.

[ck_chino]

Same thing happened to me haha took them off thinking they were stock and saw 06u00

Okay so looking for a bit of advice here, as I'm new to the whole Skyline thing and new to owning a vehicle with turbos as swell.

I've owned my R32 GT-R since for a few months now, and wasn't able to get much info about the vehicle from the previous owner. I've been buying parts for a while with the intention of turning boost up to around 1.3 bar and running E85. So far I've gone with a Walbro 255 pump, ID 1000cc injectors, and Haltech Platinum Pro ECU. So here's where I'm at now: I mistakenly assumed the car had stock R32 turbos, and purchased a set of R34 N1's (AA403) that only had 20,000km on them. Well in the process of removing the turbos currently on the car I discover that it was actually equipped with R32 Nismo turbos (06U00).

So I guess my question would be are the Nismo turbos worth keeping on the car? I know they support more power but they're journal bearing design vs the bb R34 N1's and I'm guessing have a bit more lag. If I were to keep the Nismo turbos I definitely think I'd need to get them rebuilt. I've tried to do research but haven't found anything directly comparing these 2 turbos. Just looking to hear some thoughts from people that have experience with either turbo, and which ones would be the better route to go. Let me know what you think!

Thanks!

-Nick

[Bruizer]

hmmm. you should go twin efr. Go big or be sad Both of those turbos you're comparing are old news!

[Skym]

Keep them.

The fact that they make more power like this is what has me wondering if I should keep them. And yeah that would be nice!

R34 N1 turbo's are good for up to around 550hp with mild cams (260 duration Tomei or Mines cams, Mines dump pipes, etc) on pump gas.

Also those turbo hp specs are on pump gas. On E85 add another +50-100hp, depending on the tune and E85 to gas mix (better fuel economy if mix with gas and has to be the type of fuel you can do this with). It's not uncommon to see a +100hp bump in hp with RB25 or RB26 when running on E85 and is more reliable due to cooler cylinder temps, etc.

Main problems they had was the R34 N1 turbo's failing, as had 3x turbo failures on the test mule 24 hour N1 R34 GTR racecar. I think the bearing design was the cause. I think they switched back to the more reliable non ball bearing design in R35 GTR stock turbo's (IHI turbo's).

I believe R32 Nismo is the Group-A spec turbo's. I think were good for up to 640hp on Group-A R32 GTR in Japan with cams, etc. They were running race fuel as well (higher octane), so more hp than the pump gas hp rating.

Also make sure the fuel system (fuel pump, injectors, fuel lines, FPR, etc) is methonal compatible when running E85.

[BakaGaijin93]

Hmm interesting. Thanks for the info everyone. I didn't really have any specific power goals going into this, but if I can even come close to the 500whp mark I'd be thrilled. I think I'll get some quotes on having the R32 Nismo units rebuilt, and base my decision from that.

[leung23c]

Here is what I am buying.

Garrett GTX2860R with Skyline style GT28 compressor and turbine housing.

Pros: direct bolt-on. New technologies from Garrett
Cons: you are not using the original anti-surge compressor cover but you actually get better lower end response

Flow somewhere between GT-RS and GT2530 and lag like a R34 N1 turbo

Rated 400HP each. Not cheap though.

http://www.ebay.ca/itm/250813255556?redirect=mobile

[Skym]

Hmm interesting. Thanks for the info everyone. I didn't really have any specific power goals going into this, but if I can even come close to the 500whp mark I'd be thrilled. I think I'll get some quotes on having the R32 Nismo units rebuilt, and base my decision from that.

The 550hp and 640hp are at the engine.

This is the E85 to gas mix type of fuel (better fuel economy and 100-110 octane rating) -

http://www.martiniracing.com.au/index.php/our-products/race-fuel

Also I know the R32 Nismo Group-A turbo's were modified (I read that they did this mod on the replica Group-A engines for the Impul Group-A R32 GTR special editions), so slightly bigger wheels in same housings can result in a mild +20hp or more per turbo hence the 640hp instead of 600hp hp rating.

This is what the Group-A GTR RB26 was like in race trim (modified R32 Nismo turbo's, cams, etc) -

http://www.youtube.com/watch?v=bIcWh993IDI

This is R34 N1 turbo's and 500hp at engine (stock cams) in a 24 hour race at Nurburgring -

http://www.youtube.com/watch?v=yhI0_52jMUA

The Gibson Group-A R32 GTR put down 593.4awhp with R32 Nismo type of turbo's (I think custom spec with bigger wheels in same housings), cams, etc -

http://www.youtube.com/watch?v=1UyoSmZ1IXs

Can get similar awhp with HKS 25/30 turbo's (similar turbo specs as mentioned in post above this post), 260 duration cams, adjustable camgears, etc.

GIO / Gibson Group-A R32GTR was a collaboration of Nissan USA (Electromotive ECU, etc), Nismo/Nissan Japan, Gibson raceteam in Australia.

Electromotive ECU (Made in USA) -

http://www.electromotive-inc.com/product/total-engine-control/

[BakaGaijin93]

I just noticed that the compressor housing of the old turbos say "A/R 60". That would make them Nismo Le Mans/GT turbos right?