I have a queston pertaining about compressor wheel aerodynamics. Ive noticed that the BW S362/366 utilize Extended Tip Technology. Ive seen multiple vids and noticed "how loud" these turbos spool. The spool noise is very audible, louder then even bigger units offered by other turbo companies. Does this loud spool pitch noise come from compressor wheel aerodynamics? Does it come from the extended tips? Does the compressor cover play a role in compressor spool "noise". Any information is appreciated.

 

All of the above... The loudest turbo I have ever heard is an Hx35 making 440, louder then the BWs300 turbos

 

Mainly the resonance of the aluminum that the cover is made of as well as the design of the compressor cover (its inducer bleed groove that makes its so loud)'

A thread about that is here. https://honda-tech.com/forums/forced-induction-16/do-all-bb-turbos-sound-like-2754533/

 

TheShodan im glad you've seen this thread and responded, thank you for your knowledge