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Gtr Owners Question, Turbo Whistle/screaming Noise...

gwin

By gwin,
in Engines & Forced Induction

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gwin Proficient

gwin

Posted
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So i find that on boost, especially in the 5krpm+range my car screams like a mofo. Its a nice sound, but I would have thought a "stock" GTR wouldnt be that screamy! I don't think that its anything leaking because the car pulls, I also know for a fact that I have stock AR.42s.

Is this normal?....

If anyone has a 32 near Preston Melb and can let me sit in their GTR for comparison that would be great ;)

Trozzle Grand Master

Trozzle

Posted
Posted

it's either air being forced through a hole somewhere in your piping after the turbo/before head, or the suction is sucking some piping closed (not sure if the second one can happen on a GTR)

gwin Proficient

gwin

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I'm on 14 psi, oh the only other non stock thing is twin blitz bovs. If there's any air leak, my boost pressure would be less than expected. hmmm I'll try and find someone with the same car and listen to theirs.

The Mafia Grand Master

The Mafia

Posted
Posted

Last time I hopped in a Skyline with a "screaming" turbo, the turbo was stuffed.

Just be careful mate, I'd inspect it before doing anymore driving. A Stuffed turbo can equal engine failure.

Duncan Grand Master

Duncan

Posted
Posted

Standard stuff should not be making any sort of screaming noise. the only time I've heard somethign I would describe as screaming it was stuffed bearings in the turbo core. Next closest noise I've heard was a nasty manifold leak.

either way....they didn't leave the factory with any sort of "screaming" noise

LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
Posted

ive been hearing a sort of high pitch whistling sound for a while also, though only when on full boost (was doing it before at 7 psi, but 10-12psi atm). me mechanics thought that maybe it was coming from the turbo itself (bearings/shaft play?), or possibly from the wastegate. ive read somewhere on here a guy had the same noise, turned out it was leaking on the turbo exhaust manifold join or something. im sort of dreading its the turbo, hope it can hold up for another 6+ months.. :)

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