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Can someone help me and explain why my hellcat supercharger makes like a wine down sound when shut off?

3324 Views 13 Replies 8 Participants Last post by  That Guy, 
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baabootoo
The impellers are slowing down, like a turbine.
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baabootoo
I hear mine do that all the time, as did my CTS-V one. Those had a problem with the front bearing that made a scraping sound. They extended the SC warranty out to 10/100K for that problem.
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