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Turbo spool sound question

Messages
66
Likes
66
Location
Mount Joy, PA, USA
#1
Ok, quick question. I'm between the Hybrid and S280. One question I have is, when you get off the gas and the turbo is spooling down, sometimes you hear that "whine" a it slows. Do both those Rittenhouse have that sound or is it usually just from bigger turbos? I know it's just a minor thing and not anything to do with performance, but I dig that sound.
I'm running Cobb cai, catless downpipe, 2.5" Cobb catback, ( looking to change that), and GFB dv+. Thanks
 


slopoke

Active member
Messages
643
Likes
633
Location
Livermore
#2
Typically, you hear the "whine" while the turbo is spooling up and building pressure. I don't remember hearing any turbo whine on decel, because the turbo should be slowing down.

In terms of a BOV, If you have a recirc system, you won't hear anything on letting off the throttle, because it's venting back to the compressor inlet. If you have a blow off valve that's vent to atmosphere, you will hear a whoosh noise on letting off of the throttle
 


Messages
485
Likes
419
Location
Boston
#3
All turbos whistle when they spool down. I agree it's a pretty sweet sound, some turbos may be louder than others. I'd assume that sound is louder with larger turbine/housing turbos. The factory turbo does make that sound but it seems to be attenuated by most cat-backs. I've only heard it through Milltek and MBRP exhausts.
 


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