R34 Gtr Turbos - Truth Please!

[GDZ-14R]

I have searched and found contradicting posts everywhere - can anyone conclude with certainty whether they have steel or ceramic turbines? My tuner wants to run more boost through them, but i would like to know for sure if they can handle it.

This is for standard 34 R's - not N1's!!!!!!

[hypergear]

ceramic turbines. blow them up first, then high flow them with steel wheels. Or upgrade to GT2860R-5/6/7

[N I B]

Ceramic but they do handle much more boost than early GTR Turbos, I have run 18psi for 6 years without trouble with later Turbos fitted to my R32. On Track days Aftermarket Turbo'd GTRs can not match the drive out of corners the R33/34 Turbos give and their topend is not enough to catch you by the next corner. Ive seen many GTRs throw the exhaust wheels and never seen one damage the engine as many claim. I think the cars that have lost both at once have had the engine fail with the engine parts taking out the Turbo.

You will be told otherwise but Years of experience have proven this correct for me.

[monga]

I would like to think that your tuner has enough knowledge about GT-R's before tuning her and what sort of turbo's and power they can run?, also it's pretty simple to take a look at turbo's and see the ceramic compond.

Edited September 20, 2009 by monga

[GDZ-14R]

Thanks heaps for the responses guys. I will eventually change the dumps (not looking forward to that task) and will check it out personally, but thought i would get the much less labour intensive answer here first.

Tuner is confident and has the runs on the board Monga, but it doesn't hurt to know a little as the consumer

Ive seen many GTRs throw the exhaust wheels and never seen one damage the engine as many claim. I think the cars that have lost both at once have had the engine fail with the engine parts taking out the Turbo.

You will be told otherwise but Years of experience have proven this correct for me.

I'm with you totally dude. I can't see why a shattered exhaust wheel would destory the engine internals.. Comp wheel - different story.

Edited September 20, 2009 by ELZ-00R

[R31Nismoid]

Exhaust wheels can, have and will destroy motors when they fail.

When there is ceramic dust/particles through the motor... where else could it have come from?

Up the boost at your own risk, if you cannot afford a rebuild, do not run more than 12-13psi through factory GTR turbos.

It is as simple as that.

[MrStabby]

I'm with you totally dude. I can't see why a shattered exhaust wheel would destory the engine internals.. Comp wheel - different story.

I agree its difficult to see how/why it would happen but there are many confirmed cases of turbine bits trashing motors, so i've just accepted that evidence and put aside my skepticism. I guess only a small proportion of turbine explosions cause engine damage, but it would be bloody minded to say it doesnt ever happen.

Also, if your turbines do let go, it costs your tuner nothing. So remember its you that wears the risk of potential turbo (or engine) damage, so make your own mind up. My old 110,000kms R32 rear let go at 13.5psi. With newer turbos the risk is less, with lower boost the risk is less, and i imagine with a richer tune (so less exhaust temp) the risk is lower.

[gotRICE?]

I'm with you totally dude. I can't see why a shattered exhaust wheel would destory the engine internals.. Comp wheel - different story.

It has something to do with pressure equalization. When the turbo goes..

Im not 100% sure, but i seem to recall reading that if the turbo let go under full boost, the sudden drop in pressure in the intake side of the process equalizes. And where does it equalize from? The HUGE pressure inside the exhaust housing of your newly destroyed turbo. In turn inhaling some of the ceramic dust from the shattered wheel.

Im probly not explaining that correctly. But i think its something to do with that. Im no Physics master

Its totally silly to say that if you dont understand why it happens. Especially when there are many people on here that have blown GTR turbos to pieces and lunched the engine in the process. If it was me, id be taking their advice and not risking it!

Edited September 21, 2009 by gotRICE?