the flutter sound is caused by air bouncing between the closed butterfly of the throttle body and the compressor outlet on the turbo, the sound is actually the air passing backwards and forwards through the intercooler. The larger the intercooler the louder and longer the sound will be, also the length and path of your inlet piping plays a part.
as for the blow back destroying a turbo, yes it is true that air blowing back through the compressor blades can do damage to the turbo, the most common way being the center nut undoing do to the blades spinning the opposite direction and therefore undoing the reverse thread of the nut but the simple fact is that the damage done by blow back is so minimal that 99% of turbo's will die from other causes before the blow back ever creates a problem Dave ----- Original Message ----- From: "Reeves Cameron" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, July 28, 2003 2:23 PM Subject: RE: BOV Sounds with no bov you can probably achieve a similar sound. close the intake/off the throttle and the air which would normally escape via the bov rushes back through and hits the compressor wheel on your turbo... increases lag time and is a perfectly good way to break a good turbo to boot... -----Original Message----- From: Geordie [mailto:[EMAIL PROTECTED] Sent: Monday, 28 July 2003 01:59 PM To: [EMAIL PROTECTED] Subject: RE: BOV Sounds Importance: High He's looking for the chirp sound. I'd say that's just some sort of whistle/trumpet type of BOV, prolly looking at a few hundred bucks to get that dopey sound, but if that's what he wants then go for it. Far better off without a BOV, pain in the ass to set up, they leak, etc.. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ben Sent: Tuesday, 29 July 2003 5:42 AM To: [EMAIL PROTECTED] Subject: Re: BOV Sounds get rid of the BOV.....i dont have a BOV on my SR....she makes a CH CH CH CH CH CH noise when u close the throttle ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, July 27, 2003 7:30 PM Subject: BOV Sounds > Hi List, > > Does anyone know what the relation is between BOV type and sound? > I have been asked how to get the 'pigeon' sound on a SR20 180sx. > I think he means the fluttery sound that is NOT wastegate flutter. > Supposedly you can get it by modifying the installation of a Turbosmart I valve. > > Wierd question, I know, but hopefully someone will be able to help out. > > Thanks, > Nick > > This message was sent through MyMail http://www.mymail.com.au > > > ************************************************************************ The information in this e-mail together with any attachments is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any form of review, disclosure, modification, distribution and/or publication of this e-mail message is prohibited. If you have received this message in error, you are asked to inform the sender as quickly as possible and delete this message and any copies of this message from your computer and/or your computer system network. ************************************************************************ --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
