R33 Gtst Something Went Wrong Please Help

[Trozzle]

Nylon compressor breaks fins/completely shattered when throttle off after redline (maximum airflow), no bov makes all the air stress the bejeebus out of the compressor fins.

The sound he heard was probably pieces of nylon wheel finding their way through his intake piping and through the engine then out the exhaust.

This would explain why he doesn't make boost now.

BUT!!!! He could also (and hopefully) have shattered the ceramic exhaust wheel instead. Would also explain lack of boost, as well as the "ting" sound as the ceramic found it's way down the dump pipe and into the cat.

Unfortunately not running the BOV would make it a little more likely the compressor wheel died, but perhaps it's the exhaust wheel. Do you hear the turbo whine as you increase throttle, but without the sucking sound? this might suggest it's still spinning as the exhaust wheel is intact. Otherwise no sound at all could also suggest exhaust wheel goneskiz.

Edited November 5, 2010 by Trozzle

[bluey33]

as i said im not extremely familiar with the engines, i own a gtr and was going off that.

wouldnt it be good to go off a mechanics guess??? even though it is over the internet

Any clown can guess a number of ridiculous things, as you have.

It would be good to go off something a good mechanic says may have caused the issue.

Save your diagnosis for wasteland please.

[hks33]

and theres all these arguments saying compression surging dosent f**k your turbo,

all i can say is what a load of shit thats what happens when the compressor wheel slows down when spinning who knows how fast

[bzkr33]

The best way to put this all to rest is to start troubleshooting mate.

Look for signs of a boost leak, have you checked the vacuum on the boost? is the car running a richer?

Have you checked the intercooler pipes/silicons, etc? I'd be looking at this again, I remember a while back I shot a cooler pipe off and experienced pretty much the same thing you did (but worst) but i could see the cooler pipe disconnected

If it is a case of what a lot of people are pointing out that the compressor wheel is bust an gone down the dump it will stop at the cat. Disconnect the front pipe from the cat and have a look, its a 10 min job.

I know of plenty of people not running a bov, and I myself have done so without bending butterflys. When my bov was blocked off and I wasn't hitting high boost there is no flutter sound. I really doubt this is the issue.

[PM-R33]

The only reason I never mentioned a blown turbo is the fact he said it still makes boost...

[karma_syke]

Phil beat me to it...

could be the piston rings are fried, you will need Dom and a mad scientist to fix it..

hahahha, mad me lol, i watched it recently

[DVS JEZ]

and theres all these arguments saying compression surging dosent f**k your turbo,

all i can say is what a load of shit thats what happens when the compressor wheel slows down when spinning who knows how fast

I know of a rb20 in a r32 running 16 psi with no bov for 12 months limiter bashing 3rd gear helis. Guy drives like nutcase.

He never blew anything. The motor was recently sold so he can put in a rb25.

I guess some ppl are lucky

[ARTZ]

The best way to put this all to rest is to start troubleshooting mate.

Look for signs of a boost leak, have you checked the vacuum on the boost? is the car running a richer?

Have you checked the intercooler pipes/silicons, etc? I'd be looking at this again, I remember a while back I shot a cooler pipe off and experienced pretty much the same thing you did (but worst) but i could see the cooler pipe disconnected

If it is a case of what a lot of people are pointing out that the compressor wheel is bust an gone down the dump it will stop at the cat. Disconnect the front pipe from the cat and have a look, its a 10 min job.

I know of plenty of people not running a bov, and I myself have done so without bending butterflys. When my bov was blocked off and I wasn't hitting high boost there is no flutter sound. I really doubt this is the issue.

Yeah if you have a nice fresh exhaust with fresh bolts..

If yours hasnt been touched for 15 years like mine was, you will get under the car, attempt to undo them and most probably bust a knuckle or two and/or strip the nuts. You will then attack it with an angle grinder in a fit of rage but chop through a power steering line when the angle grinder kicks back resulting in fluid everywhere and power steering that no longer works , so you try to fix it with a rubber hose and 5 clamps, this will get you to the end of the block if you are lucky before it will burst leaving 10$ worth of new fluid all over the road.

It will then take you a few days to a week to source a new power steering line for 70$, when you do get it and fit it you will need to buy more power steering fluid for 10$. But you will now need and oxy and probably a hoist to get off the stripped rusty bolts, so drive to an exhaust shop and pay the guy 20$ to undo them for you plus another few bucks for some new bolts. Bringing the grand total to about 115$ and 2 weeks of farting around...GL

Edited November 5, 2010 by Arthur T3

[bzkr33]

Yeah if you have a nice fresh exhaust with fresh bolts..

If yours hasnt been touched for 15 years like mine was, you will get under the car, attempt to undo them and most probably bust a knuckle or two and/or strip the nuts. You will then attack it with an angle grinder in a fit of rage but chop through a power steering line when the angle grinder kicks back resulting in fluid everywhere and power steering that no longer works , so you try to fix it with a rubber hose and 5 clamps, this will get you to the end of the block if you are lucky before it will burst leaving 10$ worth of new fluid all over the road.

It will then take you a few days to a week to source a new power steering line for 70$, when you do get it and fit it you will need to buy more power steering fluid for 10$. But you will now need and oxy and probably a hoist to get off the stripped rusty bolts, so drive to an exhaust shop and pay the guy 20$ to undo them for you plus another few bucks for some new bolts. Bringing the grand total to about 115$ and 2 weeks of farting around...GL

Haha, bad luck mate, some people get lucky with seized bolts and some people don't. he did mention that he does have an exhaust so I would at least give it a shot at cracking those bolts.

[Trozzle]

The only reason I never mentioned a blown turbo is the fact he said it still makes boost...

I could have sworn he said it didn't make boost :S

EDIT: I missed the 4psi part...only read that it drives normal off boost lol...

Yeah boost leak imo. Unless you've somehow munted enough exhaust fins in the right way that it simply won't spin fast enough regardless of how much exhaust it flows

Edited November 6, 2010 by Trozzle

[hks33]

I know of a rb20 in a r32 running 16 psi with no bov for 12 months limiter bashing 3rd gear helis. Guy drives like nutcase.

He never blew anything. The motor was recently sold so he can put in a rb25.

I guess some ppl are lucky

well you cant say running no bov does you any benefit as opposed to runnning a bov its there for a reason and as you said some people are lucky its does cause a unbelievable amount of stress when your compressor wheel chops up the air

best regards chris

[jarrod83]

if your going to be pulling off the exhaust bolts to have a look, just make sure you hit them up with some wd40 a few times the days before, by the time i pulled mine off they felt lose, while my mechanic friend broke 4 of his studs off the head.

maybe the best solution would be to see where that swoosh noise is coming from before you start pulling things apart, if its on the exhaust side you can usually feel around and find any leaks while the engines cold once you start it up, although i would expect to hear any leak big enough to stop boost.

[ben3322]

Any clown can guess a number of ridiculous things, as you have.

It would be good to go off something a good mechanic says may have caused the issue.

Save your diagnosis for wasteland please.

mate the guy asked for help i gave him something to check. i didnt say this is the problem go fix it now.

it might sound like a far fetched thing to you who only knows about cars from reading things on the internet but to someone who works on cars 6days a week its not that strange.

look at yourself taking a dig at someone over the internet, passing judgement and not even having something legitimate to add to the actual topic.

some mothers do have em.

[Tony de Wonderful]

Cool.

Doesn't change the fact he hasn't bent the throttle body in his car.

Is that even possible? I'm thinking the intake manifold welds would let go first?

[PM-R33]

Bending a throttle butterfly is possible however the cause of it is usually an intake backfire from igniting fuel inside the plenum chamber or more commonly a nitrous backfire.

(This "common" nitrous backfire is the reason Fast and Furious had a big "DANGER TO MANIFOLD" and Dom mentioning "Your lucky you didn't blow the welds on the intake". See, Fast and the Furious is semi factual )

There is a couple of other causes but they are also rare. The fact is a GTST throttle butterfly is thick as f**k and on a stock GTST it would not have happened in the situation the OP described. Not to mention a bent/damaged butterfly would cause issues that would identify it as such. The fact he wasn't running a BOV is completely irrelevent since butterflys usually bend/damage outwards, not inwards.

I couldn't be screwed going into details when I first said "He hasn't bent the butterfly" but now I have since this is still being brought up; so there you go.

Edited November 6, 2010 by PM-R33

[jarrod83]

stupid explorer

Edited November 6, 2010 by jarrod83

[jarrod83]

Ben i think they are just saying although you were probably trying to help.. it just wasnt a very helpful suggestion, simply because even if you had a bent throttle body it wouldnt give his symptoms, if it was bent so it was leaking in air at idle it would be idling higher than usual, if it was stuck in a position you would know and if it was opening up but bent.. it would not stop your car from making boost, i would imagine that even if it was bent so it was half covering the hole, it would still easily make 7psi of boost... simple because those turbos begin to make boost as soon as the throttle body starts to crack open

[bluey33]

mate the guy asked for help i gave him something to check. i didnt say this is the problem go fix it now.

it might sound like a far fetched thing to you who only knows about cars from reading things on the internet but to someone who works on cars 6days a week its not that strange.

look at yourself taking a dig at someone over the internet, passing judgement and not even having something legitimate to add to the actual topic.

some mothers do have em.

Thats funny considering I am also a mechanic. No need to add anything 'legitimate' because other members already mentioned concerns. As they said check for boost leaks and inspect turbo. It will more likely then not be one of the two.

As i said earlier. Wasteland is that way ------------->

[R33 Turbo 25]

wow, the thread got a little out of hand... lol.

I found a split on of the hoses on the intercooler. This would explain why it was still boosting to about 4psi, and when I released the accelarator, the shhh sound was the air escaping from the hose and not going though the turbo.

Thank you very very much for your input all of you. I cant express how happy im that it wasn't the turbo

[jiffo]

wow, the thread got a little out of hand... lol.

Did it ever!!! But you've learned a lot.

Your turbo car may blow intercooler pipes or clamps again, and of course the ecu is AFM based so it thinks all that leaking air is actually being consumed by the engine, so it adds fuel.

Result> low boost, engine runs super rich, black smoke.........

Now you're aware and can pass the info on to others. Look for the simple stuff first.