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removing dump valve to get 'flutter' sound

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Old 14 April 2013, 03:07 PM
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slash920
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Default removing dump valve to get 'flutter' sound

how is this done, i know valve has to be removed, but what goes in its place, as the air will vent to atmosphere. for a v2 wrx.

thanks for any help.

jamie.
Old 14 April 2013, 03:13 PM
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alcazar
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A bung is placed where the Dv was, the other tube also needs blocking.

The flutter sound you refer to is rotor stall......are you sure you want to do this to an older car? It is NOT kind to the turbo.
Old 14 April 2013, 03:31 PM
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Its also best to have a fmic to get the best flutter noise.
Old 14 April 2013, 03:44 PM
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Do you also have to remove the inner wing snorkel to get the best outa of it?
Old 14 April 2013, 04:23 PM
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you would need to to fit a decent front mount, induction kit and a strong turbo to run DV less as the noise is compressor surge, ie...the air that should be recirculated is being pushed/forced back over the compressor blades in the turbo.

Last edited by The Pink Ninja; 14 April 2013 at 04:24 PM.
Old 14 April 2013, 04:24 PM
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veerinder9
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Originally Posted by GAZ2293
No but you would need a decent front mount, induction kit and a strong turbo to run DV less as the noise is compressor surge, ie...the air that should be recirculated is being pushed/forced back over the compressor blades in the turbo.
What about a silicone inlet pipe?
Old 14 April 2013, 05:28 PM
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Gaz... where you getting this info from?

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Old 14 April 2013, 05:35 PM
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Originally Posted by nyscooby
Gaz... where you getting this info from?
Common knowledge fella.
Old 14 April 2013, 05:47 PM
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Originally Posted by veerinder9
What about a silicone inlet pipe?
Wont really make a difference i dont think, Although it does increse the sound through the induction side of things.

Originally Posted by nyscooby
Gaz... where you getting this info from?
Out of my head, lol, Thats what i have always been led to believe anyway, Something to do with letting off or closing the throttle body and if the pressure isn`t released its sucked back towards the turbo compressor, I could be totally wrong though as this is different to wastegate flutter

Last edited by The Pink Ninja; 14 April 2013 at 05:51 PM.
Old 14 April 2013, 05:59 PM
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This noise?
Old 14 April 2013, 07:00 PM
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One of your old ones Jay?
Old 14 April 2013, 07:04 PM
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Yes mate....STI bug with a 20g, fmic, RCM cone and a deleted d/v.
Old 14 April 2013, 07:13 PM
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A similar setup on my mates RA...
Old 14 April 2013, 07:42 PM
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Is DV'less worse for performance, no difference, better?
Old 14 April 2013, 07:54 PM
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One of Daves, lol


Last edited by The Pink Ninja; 14 April 2013 at 08:02 PM.
Old 15 April 2013, 09:13 PM
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Anyone know about whether DV'less increases/decreases performance?
Old 15 April 2013, 09:43 PM
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Originally Posted by adz556
Anyone know about whether DV'less increases/decreases performance?
If you mean adding bhp then no, it does however make better gear changes as in your pickup after a gearchange will be alot smoother where as with a dv it gives it that lil jerk after gearchange, thats me talking frm my experience as I run without a dv now and I love it.
Old 15 April 2013, 09:51 PM
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I have an SC36 turbo..... Will that be ok running DV less?
Old 15 April 2013, 09:58 PM
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Originally Posted by adz556
I have an SC36 turbo..... Will that be ok running DV less?
I dont know mate thats something you will have to ask scoobyclinic they will be able to tell or the sc36 users
Old 18 April 2013, 09:31 PM
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slash920
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does sound good. after reading the info i will probs leave it on my older turbo, aint gonna be too kind on it lol.

great vids btw.
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