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Wird Turbo Sounds

Sammy34

By Sammy34,
in Engines & Forced Induction

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Sammy34 Community Regular

Sammy34

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This may not be a problem at all, its probably just me being over protective of my car.

Currently Im running standard turbo on r34 gtt at 13psi. The turbo sounds fine up until around 10psi then it makes lick a loud flickering sounds, possible could be described as a vibration sound under heavy load. I need to do some more testing myself while driving but i seems to only happen when i put my car under heavy load once its already moving NOT on a fast take off.

I thought it may be a bit of shaft play or something along those lines.

One again I may be being over protective of my car but it just doesnt sounds right to me. Anyone got any ideas of what it may be?

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Sammy34 Community Regular

Sammy34

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Turn the boost down.

12psi and beyond is lethal on a stock ceramic Neo turbo. The vibrations you're experiencing might well be shaft play...

How long have you been running 13psi for?

ah the better part of 3 months I guess, and I dont really drive my car llike a maniac. If its shaft play, its already starting to happen at 10psi so i may as well start looking for a new turbo regardless yeh?

Sammy34 Community Regular

Sammy34

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nylon compressor wheel with ceramic exhaust turbine wheel

MM so I spoke to my mechanic, could be anything, worst case senario turbo is Mcrooted. could be a intercooler piping problem which could result in the turbo overworking so we have the same outcome of turbo Mcrooted. Gana look at getting it repaired and hi flowed. Or a resonably priced bolt on.

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Sammy34 Community Regular

Sammy34

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so this is really starting to concern me as i would have thought, if this weird vibration im getting above 10psi was the turbo i would have expected it to die by now... i probably need to get a recording of it, but its difficult as it only happens when the car is moving, if i park the car and rev the engine it doesnt happen :S

Its like a vibration sound could be closely related to the sound of a helicopters blades starting to pick up speed.

SS8_Gohan Grand Master

SS8_Gohan

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paul is waaaaay more learned than me :) so i'd be inclined to list to him, but yeah, the reason why i asked about the BC because i've just recently found out they can make a ticking noise when coming onto or around boost.

we just put some foam behind the solenoid to stop the ticking. It "could" be what's happening to you, but you are running a decent amount of boost for a stock turbo

Sammy34 Community Regular

Sammy34

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paul is waaaaay more learned than me :P so i'd be inclined to list to him, but yeah, the reason why i asked about the BC because i've just recently found out they can make a ticking noise when coming onto or around boost.

we just put some foam behind the solenoid to stop the ticking. It "could" be what's happening to you, but you are running a decent amount of boost for a stock turbo

So ive found out it could be compressor surge, non the less, get new highflow turbo, plenum, airflow meter and injectors done this week, so we will see waht happens.

I highly doubt its detonation as this car is so well looked after, gets a FULL services every 5,000 km's. The engine has only done jsut over 100,000 or so Km's and has had the timing belt and everything done. Never gets touched by anyone bar my mechanic who i trust with my car more than I trust myself. The car is never thrashed, infact its very unlikely the cars see the likes of that 13psi more than 4 times since it was last tuned.

But the car will be tested and dynod this week and ill post up dyno charts and any problems we encounter in the process.

sIIgtst Rising Star

sIIgtst

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So ive found out it could be compressor surge, non the less, get new highflow turbo, plenum, airflow meter and injectors done this week, so we will see waht happens.

I highly doubt its detonation as this car is so well looked after, gets a FULL services every 5,000 km's. The engine has only done jsut over 100,000 or so Km's and has had the timing belt and everything done. Never gets touched by anyone bar my mechanic who i trust with my car more than I trust myself. The car is never thrashed, infact its very unlikely the cars see the likes of that 13psi more than 4 times since it was last tuned.

But the car will be tested and dynod this week and ill post up dyno charts and any problems we encounter in the process.

Detonation is down to the tune not the general upkeep of the engine .. even brand new engines can have det.. its all in the tune i.e ignition timing.. are you running an aftermarket ecu or just the standard one? did you check the base timing when the timing belt was done? these could be some possibilities , not having a go at you or your tuner just trying to help..

Goodluck with it

Sammy34 Community Regular

Sammy34

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Detonation is down to the tune not the general upkeep of the engine .. even brand new engines can have det.. its all in the tune i.e ignition timing.. are you running an aftermarket ecu or just the standard one? did you check the base timing when the timing belt was done? these could be some possibilities , not having a go at you or your tuner just trying to help..

Goodluck with it

ah ye hi understand that but I trust the tuner I used as he learnt from matt spry. Yeh I have a nistune vg30 chip.

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