no its not im afraid, i hade a hks super sequencial bov on my skyline, they make a distinct high pitch squeeeeeck... if u dont know wat that noise is, go near a turbo car and rev it from under the hood from throttle body so its not full boosting and release it, ul notice a flutter, usaly can hear it more on cars with pod-filters or open intakes , cause theres no airbox hiding the noise,,,
if ur car does this on 6-10 psi, after time,your compressor shaft gets movement and starts rubbing the walls of your turbo, eventualy turbo ****s out,