Turbo Help

[R32GTS4NZ]

I was looking at having my R32 Nismo turbos rebuilt as i was having boost issues and have come across a hurdle.

One of the shafts was damaged and turbo specialist only discovered it when he was balancing.

What he has suggested as these need replacing is to go for a gt25 setup using my existing .60 compressor housing and either the .64 exhaust or a .48 exhaust housing of a standard gtr turbo. The benefits of this is it will be the same price as rebuilding the nismo turbos but instead of the 270 thrust bearing I will have a 360 thrust bearing.

What would you recommend in terms of the exhaust housing? I was making 261rwkw on 12.2 pounds with the nismo turbos. what would I expect with the different housings, Response vs top end will the .48s struggle up higher revs or should they be fine for a relatively standard engine.

Cheers

[Duncan]

get rid of those nugget bush bearing turbos and put some proper ball bearing turbs on instead

[R31Nismoid]

Not really worth rebuilding as Duncan said, so if you could answer the below there might be some better options

Do you have a built motor mate?

What are the overall goals and budget?

[R32GTS4NZ]

Not really worth rebuilding as Duncan said, so if you could answer the below there might be some better options

Do you have a built motor mate?

What are the overall goals and budget?

Hey there, the motor has been rebuilt in Japan however am unsure of exact rebuild specs.

Power goal at this stage is around 300rw/awkw at this stage I just need turbos to return car to road

The turbo person I am dealing with said using these newer cores (t25 or something) they are very similar to the gt28 series but are also rebuildable

I have looked into the ball bearing turbos pricewise it is two thirds the cost of these for the t25 setup and at the moment my budget is really stretched and won't allow the ball bearings

Edited May 17, 2010 by R32GTS4NZ

[clip14]

if your power goals are higher than what you are running now, then i would not go down in exhaust housing size. you'll only limit the maximum power you can make

[R32GTS4NZ]

if your power goals are higher than what you are running now, then i would not go down in exhaust housing size. you'll only limit the maximum power you can make

I understand this, however according to the turbo builder he tells me with .48 housings I should see full boost around 4000rpm and that he knows of a car making 500hp with these style turbos.

What I would like to know is this realistic, will having the .48 rears reach full boost at 4000rpm and be good for 300kw

From what I have read it seems that no matter what the n1s are laggy however with the smaller housings will they turn out ok?

[zebra]

I understand this, however according to the turbo builder he tells me with .48 housings I should see full boost around 4000rpm and that he knows of a car making 500hp with these style turbos.

What I would like to know is this realistic, will having the .48 rears reach full boost at 4000rpm and be good for 300kw

From what I have read it seems that no matter what the n1s are laggy however with the smaller housings will they turn out ok?

Thats an issue, he didnt say these exact turbos, so he could be talking about any bolt on GTR turbo making 500hp

not the ones he will make for you

[R31Nismoid]

I understand this, however according to the turbo builder he tells me with .48 housings I should see full boost around 4000rpm and that he knows of a car making 500hp with these style turbos.

What I would like to know is this realistic, will having the .48 rears reach full boost at 4000rpm and be good for 300kw

From what I have read it seems that no matter what the n1s are laggy however with the smaller housings will they turn out ok?

Mate i make 12psi @ 3300pm, and then 1bar somewhere soon after that.

This is with GT-SS's and they will make a LEGIT 500hp - not a "guess" with that "style".

And they are NOT using .48 housings, they are infact LARGER.

So basically...

Larger housing, better response

Something is wrong with the turbos you are buying if its not getting it's giddy up until 4000rpm with such tiny housings.

[R32GTS4NZ]

Mate i make 12psi @ 3300pm, and then 1bar somewhere soon after that.

This is with GT-SS's and they will make a LEGIT 500hp - not a "guess" with that "style".

And they are NOT using .48 housings, they are infact LARGER.

So basically...

Larger housing, better response

Something is wrong with the turbos you are buying if its not getting it's giddy up until 4000rpm with such tiny housings.

Ok thanks for that, I have been thinking it may be just worth getting stock turbos until funds allow further OR I have just been offered the garrett ball bearing ones at cost price from a different source. He suggested 7s or 9s and so if the cost is right i may go for them as they will be similar price to the rebuild and ball bearing!

I understand there isn't a huge difference between the two so will do some more research into them. Any pointers will be appreciated

Currently stock ecu but definately looking at uopgrading

[R31Nismoid]

They will be the same price if not cheaper than a rebuild + ball bearing simply because there is no labour involved.

Given -9s are around what, 1200-1350ea depending, i see little point in any other option

Also never put factory turbos back on, just too risky IMO.

[R32GTS4NZ]

They will be the same price if not cheaper than a rebuild + ball bearing simply because there is no labour involved.

Given -9s are around what, 1200-1350ea depending, i see little point in any other option

Also never put factory turbos back on, just too risky IMO.

Rebuild was about $1200 each with the new cores machining etc.

Initially I got priced $1610 each for the gt2860s but now someone is pricing up for me tomorrow morning and said they can do cost price

I understand and would prefer to go straight for the ball bearings however there are some other people influenicing my decision and watching my wallet sadly

Prices are NZD so are a little more expensive but hopefully turns out well.

What ones would you reccomend for street? I love the feel of the kick when boost comes on, will these provide a nice feeling when I put my foot down?

[R31Nismoid]

-9s