Well a high pitched whine @ WOT sounds about right. I mean its spinning like 20K rpm or somethin so it will whistle. It probably makes all types of noise that we can't hear, dog whistle type stuff. So I would say that as long as its spinnin at WOT you are OK. Edited by: 403turbo
The pitch will change for sure. I believe that there is a resonator on the intake as well that is designed to dampen out some of the sound. A turbocharger that is the size that is on our truck is likely between 50K and 60K rpm at WOT.
Some of the industrial machines that we evaluate have turbos that are the same size as a tire of of a mid sized front end loader and they are going 8 to 10K Rpm. Heck a few of the 2 cycles have 3 turbos that are twice the size of ours that run off of instrument air just to get the big windmill going so the beast will start.
Im telling you though, It does it in the middle RPMs, not when its under full boosted. I've had Supercharged cars that I've spun the blower well over the limit they were suppose to be. I've ridden in Supras making 30+ psi.. Ive never heard this before.. Its like a tone from a phone. People that ride in it are like WTF lol.;
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