Illusive Turbo Flutter, But Whats The Damage Its Causing? - SaabCentral Forums
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum

Go Back   SaabCentral Forums > Saab 9-5 Mk.I, 1998-2009 > 9-5 Performance, Mods & Tuning

9-5 Performance, Mods & Tuning Covers Tuning & Performance modifications for the 9-5 is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Thread Tools Display Modes
Old 19th March 2011
RichyB RichyB is offline
Junior Member
Join Date: Mar 2011                                                
Location: canterbury
My Saabs: 2000 9-5 estate
Posts: 11
Default Illusive Turbo Flutter, But Whats The Damage Its Causing?

Ok, have been wanting to replace the factory fitted bosch recirc valve.
Ended up scouring eBay for the Forge Split-R recirc valve (one of the only aftermarket recirc valves with the psshhhh noise aswell) but ultimately wanted to get some turbo flutter as I think you'll agree the sound is awesome!

Anyway, in fiddling with the standard valve still attatched forgot to replace the vacuum hose, which to my surprise gave me the flutter noise when I booted it.

Just wondering what damage is caused if the vacuum hose isnt attatched?
Still getting to know the ins and outs of a turbo'd car.
Reply With Quote Quick reply to this message
Sponsored Links
Old 19th March 2011
Mrmegnum's Avatar
Mrmegnum Mrmegnum is offline
Senior Member
Join Date: Feb 2007                                                
Location: Denver
My Saabs: 02 9-5 aero
Posts: 196

Not sure about damage, but that's pointless to do. That vacuum line is the pressure that closes the valve so pressure can build in the system, then uses vacuum pressure to release the system. Without it you shouldn't be getting very much boost.
Reply With Quote Quick reply to this message
Old 19th March 2011
AsaSpadeSS AsaSpadeSS is offline
Senior Member
Join Date: Dec 2010                                                
Location: CT
My Saabs: 2000 Saab 9-5 w/TD-04 Stg1 5 Speed
Posts: 141

Originally Posted by RichyB View Post
Still getting to know the ins and outs of a turbo'd car.
*smh* The "ins and outs" of a turbocharged engine have nothing to do with sounds, this is pointless, and if the hose is supposed to be there why do you think removing it would be a good idea? If your turbo actually flutters not making fluttering sounds from the DV there is serious problems.
Reply With Quote Quick reply to this message
Old 20th March 2011
hercules hercules is offline
Join Date: Nov 2004                                                
Location: Leics UK
Posts: 284

The fluttering noise is compressor stall. Pulling the vacuum line off the recirc valve leaves the inlet full of charge (compressed) air. When the throttle shuts, this air cant go anywhere 'cos the recirc valve isn't working, this in turn causes the compressor to stall or can cause it to reverse. Not a good idea. Will bust the turbo
Reply With Quote Quick reply to this message
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Vandalism causing tire or wheel damage? Snaab93 NG900 & OG9-3 Workshop 7 4th December 2009 04:27 PM
Turbo Flutter bparker5512 9-3 Sedan, Convertible ('04+)/Combi & 9-3X Tuning/Modifications - ALL ENGINES 15 15th September 2009 03:38 PM
turbo flutter? saabmarine NG900 & OG9-3 Performance, Mods & Tuning 1 14th September 2009 12:11 AM
Turbo Flutter bparker5512 9-3 Sedan, Convertible ('04+)/Combi & 9-3X Workshop 4 23rd July 2009 09:07 AM
whats the damage? sadders NG900 & OG9-3 Workshop 6 26th October 2005 04:05 PM

All times are GMT -4. The time now is 01:50 PM.

Powered by vBulletin® Copyright ©2000 - 2016, vBulletin Solutions, Inc.

top of page | sitemap | email us

copyright © 2003 - 2011, All rights reserved - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.