aside the normal spool sound, i hear a whining sound kind of like supercharger.. once at full boost, it definately does'nt sound right

i'd like to eliminate smaller things out the way first, if it was bov (hks knock offs), would it sound like that if valve was loose??

 

metal to metal contact of the compressor or turbine wheels? just an idea cause we cant hear the sounds.

 

is it a new turbo or used?

 

Poorly balanced turbos that still have good clearances will 'scream', which equates to vibrating like hell. Check for big deposites on the exhaust wheel, or for developing shaft sideplay.

A large turbo with no intake or any turbo with no exhaust will have a jet-engine sound due to the way air flows past the blade tips. Its a smooth whistling, very few unusual harmonics (no buzzing/chattering/etc).

 

it almost sounds like brakes squeal like an echo of brakes squealing as it starts to spool and then into greater sound somewhat similar to saturn or cobalt.

i've had it for 4-5 years, about 35k miles or more and no problems. its not ball bearing

 

Is there a way to get a video/audio clip of it?

 

if someone hasn't suggested this..

take off the intake, and see it if bottoms and touches the housing.

If it's easy to do.. take it off the car and check the blades.

 

yea grab the shaft and see what type of movement you got and spin it at the same time to see if it hits the housing .......that didnt sound rite

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22 civic &raquo;</TD></TR><TR><TD CLASS="quote">yea grab the shaft and see what type of movement you got and spin it at the same time to see if it hits the housing .......that didnt sound rite </TD></TR></TABLE>

haha, that's pure sig material

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by y7turbo &raquo;</TD></TR><TR><TD CLASS="quote">metal to metal contact of the compressor or turbine wheels? just an idea cause we cant hear the sounds. </TD></TR></TABLE>
same sound happened to a friends gti...took the turbo off and there was definately some metal to metal contact

 

back from the dead.. this was one of couple exhaust leaks due to loose bolts. and partially due to my cheap ebay bov.