I just started boosting today, but when I get under boost, I heard a loud squealing noise from about 3 psi - 8 psi. Any idea's what would cause this? Will it go away after using it for a while....I did just put it in, could that be it?

Oh, by the way, this is a used 14b turbo that had about 80k miles on it.

 

You sure it's not your turbo spooling? It may be the bearings/bushings (niot sure what comes in those turbos) are bad/going bad .


[Modified by Diego Boost, 11:39 PM 3/3/2003]

 

could it be your belts?

 

if its not the noise of it spooling, it might be the blades hitting the housing making a metalish squel noise.

 

haha, I think that noise would go away really quickly...with your turbo

 

the only squeling noise i ever heard boosting was my tires...hehe But the t25/14b is very loud..it makes ALOT of noise. Could you make a wav for us?

liam

 

I just started boosting today too (sorta). Im only runnig a downpipe now and i can hear my turbo spool nice.

 

What does your turbo spooling sound like?

 

like a pissed-off jet, combined with the sound of a screaming newborn, all on top of an engine note that quadrooples in speed because of the newfound air....

 

Sounds to me like your wastegate is bleeding off boost and sqeualing..

I had that same problem.. What BOV are you running ? If your running a factory unit-- that would for surely be it.. If its aftermarket-- that still could be it..

Check your BOV for leaks.. I'll put money on it.. I know the sound you describe..

 

Not sure if it will apply here, but on my old Supra this was usually caused by a leaky manifold. Supra owners called it the "Screaming Banshee" mod. Might be worth a quick check. I think what caused the noise was all that boosted air trying to squeese through a small space and whistling, thats why you don't hear it out of boost.

Josh