Turbo 'whistling' Under High Boost On 1999 R34

[Haxorz]

I just got a report back on an R34 I'm looking to purchase. The report said that the turbo makes a whistling sound under boost.

The guy who performed the inspections knows skylines well and owns one himself. He said this is not normal but has heard it once before on another skyline.

Is this bad? Or does it not matter? The car also doesn't perform as I think it should but then again it's only running the stock exhaust and I'm used to my R33 with a full 3" system.

Apart from this the car is in excellent condition and has done few km's.

The mechanic said he 'doesn't really know' if it's a bad thing or not.

Any turbo gurus? Does the turbo have a clipped fin and is stuffed or what?

[Craved]

only turbo i've heard whistle had big end float.

[ish]

you need to look at this logicly ....

the noise will be either air or bearing ... if its air then that can be assesed as maybe a small leak which would could easily found with a bit of testing ... mine was a flange leak

If its a bearing then thats a bit different ... some bearings will whistle for ever never being affected and some will groove along untill they have no slippy stuff left and seize ...

compared to the rest of the car the turbo is condidered a bolt on so i say if its the right price go for it and strap on a better huffer when you can .....

[Starionturbo]

where was it leaking from exactly and was it affecting ur idle?

regards

kim

[Abo Bob]

My R34 stock turbo whistled from the day I got it. Other people also said that most others don't do it but mine was fine. I'm sure it had nothing to do with was made it blow in the end so I wouldn't worry.

[Sydneykid]

Our R34GTT did the turbo whistle as soon as we upped the boost even a little bit. The Stagea is the same. The R33GTST doesn't and its turbo is a lot older than the R34GTT or the Stagea. Maybe something to do with the Hitachi turbos, plastic compressors etc.

cheers

[illusiVe]

ive driven about 10-15 r34 gtts, and i have not heard one whistle.. just giving my input

nfi if thats a good or bad thing.. maybe its so u can woof whistle at girls without having to be louder than your exhaust or sound system

edit: bad grandma.... grammar

Edited March 29, 2006 by illusiVe

[AlexCim]

A guy who imported a Stagea got a report where the turbo "whistled"

It all turned out good and fine.

[satanic]

Both my stock turbo and my new turbo "whistles"... Car runs perfectly and I'm happy with this additional "stimulation"

[Abo Bob]

Yeah I liked it.

[satanic]

OMG it goes WOOOOOOSSSSSSSHHHHHHHH

[Haxorz]

This one was a 9/1999 model. I wonder if the build date has anything to do with it?

[satanic]

Doubt it... turbos used would be exactly the same IMO

[mad082]

are you running a pod? as they make the induction noise louder so you hear a sort of whistle noise

[Abo Bob]

Mine is 07/99

[Alien]

if u run a pod you will definately hear the difference in induction noise

back when i was running nismo flatbed air filter in the stock airbox, the turbo couldnt be heard at all

[Haxorz]

No pod.

[satanic]

I debate the fact you can't hear the turbo at all with a panel filter... sure it may not be as loud, but it will nonetheless be audible.

[Haxorz]

Well, car has just been purchased. If the turbo explodes within the first 3 months I’ll let you all know!

Hmmmm…. R34..... Black….. Oooooooh baby.

[illusiVe]

just picked mine up on tuesday... on stock boost, mine didnt whistle.. just the compression sound of air rushing.. but i put in a manual boost controller, bumped high up to 9psi... and it sounds fine getting there.. but it starts to whistle when it manitains 9psi from say 4k-7k