R34 Gtr Ball Bearing Turbos

[Turbz_13]

how r ya guys, i have just brought an r32 GTR that has r34 gtr bb turbos on it. i was just wanting to know if these particular turbos are ceramic or not!! what kinda boost would i be able to run these turbos at?

[thechief]

i) steel wheels

ii) 1.4 bar

[R31Nismoid]

iii) use the search button

took chief an hour to post, search would have found it in under 5mins

[Mik]

i) steel wheels

ii) 1.4 bar

<{POST_SNAPBACK}>

Nope...they definately have ceramic turbines.

1 bar absolute max...and even then they have been known to let go and take the engine with them.

[Turbz_13]

well looks like ill b investing in some n1 or some other type of turbos with a steel wheel if they dont.

[JH32]

R34 GTR N1 have inconel wheels, I think?

[djhatton]

Nope...they definately have ceramic turbines.

1 bar absolute max...and even then they have been known to let go and take the engine with them.

<{POST_SNAPBACK}>

what crack are you smoking? the r34 standard turbos are steel wheeled. this is WELL doccumented.

1 bar is easy for these things here and they will hold together no problems. you lose efficiency if you start to run too much through them but 1.2-1.3 bar would be a walk in the park.

and i've yet to see proof of an engine "sucking" a shattered exh. wheel back into an engine. from what i've heard this is an unsubstantiated rumour started by some workshops that wanted to sell people uprated turbos.

d

[wrxhoon]

what crack are you smoking? the r34 standard turbos are steel wheeled. this is WELL doccumented.

1 bar is easy for these things here and they will hold together no problems. you lose efficiency if you start to run too much through them but 1.2-1.3 bar would be a walk in the park.

and i've yet to see proof of an engine "sucking" a shattered exh. wheel back into an engine. from what i've heard this is an unsubstantiated rumour started by some workshops that wanted to sell people uprated turbos.

d

<{POST_SNAPBACK}>

By the way engine doesnt suck the wheel in , it sucks the ceramic dust , you will find the wheel in the cat , minus the blades .

Edited November 23, 2005 by wrxhoon

[Mik]

what crack are you smoking? the r34 standard turbos are steel wheeled. this is WELL doccumented.

1 bar is easy for these things here and they will hold together no problems. you lose efficiency if you start to run too much through them but 1.2-1.3 bar would be a walk in the park.

and i've yet to see proof of an engine "sucking" a shattered exh. wheel back into an engine. from what i've heard this is an unsubstantiated rumour started by some workshops that wanted to sell people uprated turbos.

d

<{POST_SNAPBACK}>

Haha...right.

How many BNR34 turbos have you seen? You seem so sure of yourself, do you want to lay some money on it?

[Turbz_13]

ok guys i may just go to a performance place. and see if they have nay laying around or see if they can help. just that there are 2 many different opinions here! but cheers for the help anyways!

[psybic]

How does an engine ever suck in the exhaust side? Just on the issue of sucking the broken wheel off?

I blew two turbos on mine. The cat ate them. Most people agree this is the animal that eats wheels (or chunks of).

Air in --->>>> BANG BAND ----->>> Air out.... this is the flow I understand anyway...

But yeah, those ceramic ones don't like to boost to much and the rings don't like too much either on those old 170,000km engines....

[GTR-Ben]

So does anyone actually know what Stock R34 GTR turbos are.. what about size wise compared to a R32 GTR.

As for the sucking back of ceramic wheels.. haha. It does happen, not some myth started by workshops. It's not as simple as air in- air out. Air does go back from pulses.

I have wrote about it plenty of times.. but it's something that would be almost impossible to prove unless you saw the engines I had seen when a turbo had let go. Perfect working engine.. turbo pops.. rear 3 cylinders scored beyond belief with ceramic dust everywhere..

Don't ask me why it happens to some and not others.. the exact cause is a mystry.

[wrxhoon]

So does anyone actually know what Stock R34 GTR turbos are.. what about size wise compared to a R32 GTR.

As for the sucking back of ceramic wheels.. haha. It does happen, not some myth started by workshops. It's not as simple as air in- air out. Air does go back from pulses.

I have wrote about it plenty of times.. but it's something that would be almost impossible to prove unless you saw the engines I had seen when a turbo had let go. Perfect working engine.. turbo pops.. rear 3 cylinders scored beyond belief with ceramic dust everywhere..

Don't ask me why it happens to some and not others.. the exact cause is a mystry.

<{POST_SNAPBACK}>

As for sucking the ceramic dust back in the engine , i dont need any convincing , i have seen plenty , actualy i have a set of pistons to prove it . I put the pics on the forum a long time ago , the 3 rears are totaly stuffed , the bore in that engine had deep scores , even the cilinder head had heaps of ceramic imbedded in it .

In my opinion when a turbo lets go some dust is sucked back in but in some engines is very little so you still have good compression and you dont think its gone in . It could have someting to do with the speed the turbine is doing at the time the wheel snaps . I have pulled an engine out that had the rear turbo let go a year before ,They installed N1 turbos , it was running fine for a year ( so they said ) , then a ringland busted on number 6 , probably leaned out .

When i pulled it appart i found very slight score marks on the pistons , bore and top of cil head on the 3 rear cilinders .

Edited November 23, 2005 by wrxhoon

[wrxhoon]

double post

Edited October 5, 2005 by wrxhoon

[GTRgeoff]

I put GTR 34 turbos on my RB25. Front turbo let go and compression in 1/2/3 is 25psi compared to 150psi in the rear 3. They are ceramic turbines, and they let go at 5psi. Not happy Jan! Haven't been able to fix the car since it died in Feb.

[pnblight]

wrxhoon is on the money

r34gtr turbos CERAMIC

1bar to 1.1bar MAX (friend ran 1.3bar and has now got a new engine because of it OUCH)

the dusting reason is simple the exhaust wheel is doing how many rpm's and when the particles let go there likely travel around bullet velocity now try and stop a bullet with wind speed(exhaust gas) that particle is going to travel some distance before it slows down and the travel path is only like less than 200mm to exhaust valve head.

pete

[djhatton]

i'm happy to stand corrected if it truly be the case.... if that is so i'll accept it no problems, but who's got it wrong. now by no means is zoom/hpi even close to the definitive source of answers cos i disagree with a lot of what they publish... however :

to quote martin donnon:

"Initially i was quite surprised at the power generated from the engine at 1.2bar of boost pressure. Coming in at 220kw (powerFC untuned) and leaving at 292rwkw (after tuning) is a bloody big gain in anyone's language; thats the sort of power gain you would normally only see from RB26DETT engines with uprated turbos and cams.

Therein lies the rub. The R34 engine in stock form is able to produce a bag more grunt than a similarly modified early-series engine. Nissan made a fair bit of noise at the time of the R34 GTR Skyline's release about the new-generation of Garett ball-bearing turbochargers. They were, of course only ever designed to add much needed torque to the engine........ The bottom line is that the R34 turbo is almost a spitting image of the R33 GT-R N1 unit with the bonus of a ball bearing core.

......................both of these units (r32/r33) carry the handicap of ceramic exhaust wheels though. Whereas 1.2-1.3bar of boost pressure on the R34 turbochargers is a 'gimme', the wise tuner keeps the boost under 1.1 bar on the early models and leaves it at that."

thoughts?

d

[djhatton]

the dusting reason is simple the exhaust wheel is doing how many rpm's and when the particles let go there likely travel around bullet velocity now try and stop a bullet with wind speed(exhaust gas) that particle is going to travel some distance before it slows down and the travel path is only like less than 200mm to exhaust valve head.

pete

<{POST_SNAPBACK}>

fair enough, but i'll believe it when i see it. it seems odd to me that it happens to some engines and not others tho. i'm sure that there's been literally thousands upon thousands of cars that have spat the turbine wheels yet this "phenomenon" isn't well doccumented. i've done a search and came up with not a lot....

like i said, i'd like to be proven wrong once again.

cheers!

david

[wrxhoon]

i'm happy to stand corrected if it truly be the case.... if that is so i'll accept it no problems, but who's got it wrong. now by no means is zoom/hpi even close to the definitive source of answers cos i disagree with a lot of what they publish... however :

to quote martin donnon:

thoughts?

d

<{POST_SNAPBACK}>

You can believe what you like , how does zoom/hpi know the turbos are the same as N1's ? Did they have them off the car ? Very hard to even see them on the car .

Edited November 23, 2005 by wrxhoon

[wrxhoon]

fair enough, but i'll believe it when i see it.  it seems odd to me that it happens to some engines and not others tho. i'm sure that there's been literally thousands upon thousands of cars that have spat the turbine wheels yet this "phenomenon" isn't well doccumented. i've done a search and came up with not a lot....

like i said, i'd like to be proven wrong once again.

cheers!

david

<{POST_SNAPBACK}>

Again , if you dont believe it then come to my place , i have a set of turbos still here the rear one with a busted wheel . I have all 6 pistons still , the rear 3 totaly stuffed from the ceramic dust .

I think some dust comes back in every engine that has a ceramic turbo wheel let go , some more than others . Sometimes very little so you still have good compression but if you pull the engine apart i'm sure you will find some score marks in it , as i found out when i had an angine rebuilt after a busted ringland and found out some scoremarks on the 3 rear cilinders . At the time that car had N1 turbos but i found out it had spat a rear turbo sometime before that .