anything which tries to stop something turning at 10's of thousands of rpm is going to stress on that piece of mechanics. it will also severely hamper the performance of your turbo as more energy needs to be exerted to spin the turbo back up to the speed at which is was operating before it was asked to slow down...
every late model turbo car that I can think of has a plumb-back bov. air is directed from somewhere near the intake plenum back into the pipe from the airbox to the turbo. vent to atmosphere bov's (which I think is the one you could be thinking of), are the noisy ones. these are illegal. -----Original Message----- From: Robert Charles Scealy [mailto:[EMAIL PROTECTED] Sent: Monday, 28 July 2003 02:46 PM To: [EMAIL PROTECTED] Subject: RE: BOV Sounds My old car used to do that with no BOV on closed throttle like you say. I have always been a bit dubious of the theory that air rushing back could damage a turbo though, has anyone ever had any damage that you could attribute to the lack of a BOV? I am no expert though, so I will quite happily hear arguments both ways. My main reasons for being a little dubious are: - If not having a BOV caused turbine damage, every factory car would have a BOV to stop warrany claims etc, but many have no BOV with no problem. - The only place in writing that I have read about BOVs preventing damage to a turbo is in advertisments for BOVs. On Mon, 28 Jul 2003, Reeves Cameron wrote: > 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]/ ---------------------------------------------------------------------
