what happens if 1 turbo dies?

[[[d a n n y]]]

i did a search for this but didnt come up with anything.

i was just wondering what happens if 1 turbo stop working on a GTR

would it only boost half (0.6bar?) rather than 1bar?

what wiol happen to the car?

[Amaru]

It makes no boost because its leaking, and it blows a crapload of white smoke... or at least thats what mine did when the rear turbo decided to let go its exhaust wheel

[[[d a n n y]]]

hm..so it'll actaully make no boost

[Amaru]

Correct... it made 0 boost

[ferni]

the boost one turbo would make would go back out the other stuffed turbo

[GTR-Ben]

Why would you even be driving it if you thought it had blown a turbo wheel off?

They actually do still produce boost pressure with only one turbo working, it's just very low as it is leaking boost ( a lot) but because the gap where the air excapes around the blown turbo compressor wheel is so small, it can still build some pressure.

Quite often (and I know not too many people have experience with this) a blown ceramic turbo will actually kill your entire engine.

[PHATR32]

but what if the exhuast wheel blows? the crap would get stuck in the cat, but youll still be ok to drive it?

steve

[Mik]

If you're very lucky the engine might be okay.

Most of the time, some fragments of the ceramic wheel will get sucked into three cylinders thorugh the exhaust ports.

[[[d a n n y]]]

hm..damn..

well least mine isnt blown yet.

[Amaru]

We stripped mine down and rebuilt it about 600kms after the turbo blew (and fitting 2530's) and there was no ceramic contamination of the internals what so ever.

Ive heard stories of it happening, but have only seen one person on these forums that has said and stuck by his story that it happened. Maybe we should get Myth Busters onto it?

[Nozila]

my car was idling really rough today and there was alot of smoke. I removed the o2 sensor where dump pipe was and noticed alot of white smoke coming out. Does this mean the turbo is dead. If this is the case, i still dont understand the rough idle. any ideas?

[Bazelinez]

how can the wheel get sucked BACK into the engine when exhaust gasses are pulsing down the pipe? Fair enough a compressor wheel but exhaust?

[ferni]

because most people hear a bang and take thier foot of the accelerator - first thing most people would do... so theres a chance of some bits of exaust wheel falling back into the engine?

I've been told if i ever hear a bang to keep my foot on the gas for another 5seconds to hopefully push all that shit away from inside the engine. I think it would be hard to do - keep your foot down after you hear a bang

[R31Nismoid]

Quite often (and I know not too many people have experience with this) a blown ceramic turbo will actually kill your entire engine.

any can i ask why this is?

[predator]

myth busters.. lol .. I would have thought even if there was ceramic on the piston crowns, it wouldn't take long before it was blasted into powder anyhow.

It's probably correct though, that when you think about it, the turbo is 95% likely to blow the turbo whilst under the foot under full boost.. blowing it out the exhaust, rather than back up the intake.

[Amaru]

because most people hear a bang

Interestingly enough, mine made no noise whatsoever when it let go...

[Wazz]

most poeple i've heard have said when they snapedoff/destroyed the ceramic exhaust wheel on there stocko turbo's have said it makes more a quick "Kadonk" if you get wat i mean...

[[[d a n n y]]]

i heard from people with blow turbo experience that they rattle inside the cat?

[Mik]

RB 26 engine shave serperate exhaust manifolds for the front and rear banks of three cylinders.

Say the rear turbo goes, there is a fair amount of time when no gas is exiting the rear three cylinders. In fact, exhaust gas from the front three cylinders will help to push the ceramic pieces into the rear three chambers.

The fact that the exhaust valves are still open while the piston is on the way down also helps to suck the particles in.

[Beer Baron]

myth busters.. lol .. I would have thought even if there was ceramic on the piston crowns, it wouldn't take long before it was blasted into powder anyhow.  

It's probably correct though, that when you think about it, the turbo is 95% likely to blow the turbo whilst under the foot under full boost.. blowing it out the exhaust, rather than back up the intake.

I've thought about this too, and I reckon that a turbo is most likely to blow as you lift off to shift gears. think about this, you are on full throttle, 6500rpm in 3rd, turbo is making 1.1bar boost, as you lift off, there is temporarily a restriction in front of the compressor (before the bovs react) that trys to slow down the compressor and by extension the exhaust wheel, but at this moment there is a huge amount of exhaust gas trying to still make boost.

all theory though

but I agree, someone should call myth busters.