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Old 21 Nov 2010, 02:16 am
Chromenut Chromenut is offline
Obsessed Cruiser
 
Join Date: Nov 2007
Location: Mooresville, NC
Posts: 5,324
Default Re: Turbo "phhsssss" or "whoosh" sound--Normal? Silenceable? Help!

Mark, if you're running a "hot air" intake (some think it's a cold air intake but it's just sucking in heat from the engine) then you will definitely hear you turbo when you let off the gas. The BOV is the louder of the two, you take it off and the loud whoosh sound goes away, but with the typhoon intake you get a loud sucking sound when you accelerate and can hear the back pressure on the turbo when you decelerate. Some don't find it that noticeable.

I had the Typhoon for a long time until I started running trace recordings on the car when I was at the track. I saw my first 300' times improve but my overall quarter mile times started to hurt the warmer the engine and/or the weather was. So I took out the typhoon and modified the stock box instead. Was a pretty simple procedure, but sounds like you might not have a stock box? Might be able to find one in a you-pull-it yard...

Here's what it sounds like with both on:
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