Strange Noise From Hks 2530kai

[EVL-R33]

Lately when my 33 comes on boost, I hear a strange whistling noise coming from my HKS 2530kai turbo, not sure if its a hose or the turbine itself.. The turbo is only 1 year old and I only boost it to around 16psi, so I wouldnt think that its the end of the turbo, must be something else.. Any ideas?

[BHDave]

It's the anti surge mod on the front of the compressor housing. Makes it whistle like a mofo

[Bunta]

im assuming it didnt do it always but?

My old turbo made a whistly type noise but in hindsight it was more of a whir...it eventually broke a shaft due to an imbalance.

The new 3076R that is on there now with the antisurge does however make a genuine whistle..kinda like a truck

[chzz]

Even one of the 33's i had with the same turbo made a similar noise its kind of nice though............So many people said my turbo on its way out..but i been thrsahing it with 16psi but still goes healthy..........new owner still happy

Edited September 24, 2007 by chzz

[White GTS-T]

What power are you putting out on 16psi? And when do you get full boost by on the 25?

[EVL-R33]

It's the anti surge mod on the front of the compressor housing. Makes it whistle like a mofo

yes i know this, its a loud whistling sound when it comes on boost, but its a different noise, its never made this noise before..

What power are you putting out on 16psi? And when do you get full boost by on the 25?

233rwkw.. installing PFC + HC, Bosch 023 fuel pump and Z32 AFM on Friday, hoping to get around 250-260rwkw.. Full boost hits at around 3500rpm(very responsive)..

Anyone had this problem before? I don't think the turbo is on its way out, as its only 1 year old.. :S

Edited September 24, 2007 by EVL-R33

[limpus]

Have a look at the 4 bolts that on the manifold to turbo flange...those bolts work themselves loose over time as well especially if you do not have the locking tabs on it...my first guess is that its leaking through that gasket...

[EVL-R33]

Have a look at the 4 bolts that on the manifold to turbo flange...those bolts work themselves loose over time as well especially if you do not have the locking tabs on it...my first guess is that its leaking through that gasket...

yeh this has happened to me before, and ive put on locking tabs.. also that gasket from the exhaust manifold to turbo is new..

the noise is like a high pitch surge, and comes on at around 7 - 10 psi.. before that i cant hear it.. the car still goes fine..

[limpus]

Had the same problem on my car...locking tabs were there and gasket was newish...only got that funny surging whistling sound at above 12psi...i re-tightened the living daylights out of the nuts and put the tabs back on and the sound went away...it might be worth a shot...good luck...

[race_snooze]

exhaust gasket near number 6, common fault check the nuts