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Thread: S3 Dump valve

  1. #1
    wesley's Avatar
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    S3 Dump valve

    Hi all,has anyone got a link to a vid with an 8p s3 running a forge dump valve by any chance as i want to get a D/V fitted but not sure which one to go with,any suggestions would be appreciated cheers.

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    boggysv's Avatar
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    By D/V do you mean dump valve or diverter valve?

    Dump valves dont work well with our engines/computer afaik, but it makes chicks wet...so..it's your call in the end of the day.
    World's Fastest S3 Driver - racing old people in toyota camries since 1997 with a 97.6% winning rate.

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    Hi
    The 2.0T ones can run the dump valves OK
    No worries on that one
    Have a look on Forge Motorsports web site , as I do know they do have quite a bit of info on there , they also do the adjustable one too
    Sarah

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    Surely the S3 has a dump valve already? Why would you want to fit another one, unless you wanted that rather chavvy 'psssssst' sound . Leave it for the Scooby/Evo brigade IMHO .

    Phil
    Sprint Blue S3 with silver-grey leather/alcantara, RNS-E with BOSE, FBMFSW and a few stealth mods....


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    2008 Audi S3

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    There is mostly just the Forge DV to fit. The latest revision doesnt tear as easily as the old one, and there have quite a few reports of Forge valves which got stuck open or closed. I am keeping with the stock DV for now, while I'm under motorplan I will just get it replaced at Audi when it (if) it breaks.

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    2008 Audi S3

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    Quote Originally Posted by Highwayman View Post
    Surely the S3 has a dump valve already? Why would you want to fit another one, unless you wanted that rather chavvy 'psssssst' sound . Leave it for the Scooby/Evo brigade IMHO .

    Phil
    It has a diverter valve, instead of venting excess boost to atmosphere (for pssst) it returns it. You can add the Forge spacer which vents and makes that noise, but the amount of air in the system is metered - so if you vent some air the car will be running lean for a little bit every time you vent (ie change gears)

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    wesley's Avatar
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    Quote Originally Posted by AwesomeSarah View Post
    Hi
    The 2.0T ones can run the dump valves OK
    No worries on that one
    Have a look on Forge Motorsports web site , as I do know they do have quite a bit of info on there , they also do the adjustable one too
    Sarah
    Do they sound good sarah and do they affect the performance at all?

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    wesley's Avatar
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    Quote Originally Posted by boggysv View Post
    By D/V do you mean dump valve or diverter valve?

    Dump valves dont work well with our engines/computer afaik, but it makes chicks wet...so..it's your call in the end of the day.
    Meant a dump valve boggysv

  10. #9
    Fast,not furious's Avatar
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    ?? ...ermm,how come mine makes this phsssst noise (i don't think its quite as noticable as the Scoobies and Evo's)

    Im running the standard OE diverter,but the noise started happening immediately after installing the Forge CAI.

    Theories? Does anyone else with a CAI notice this?


    S3 Brilliant Red - 340bhp

    Custom Code Phase 2 + PSS, Autotech pump, Hybrid Forge/ITG Maxogen CAI /Reflactagold, Sprint Booster, Forge Quickshift, Forge DV, Denso Iridium sparks, PCV mod/oil catch can, R8 oil filler cap, Sachs performance clutch,Exhausts UK custom stainless TBE, Braille no-weight battery,PIAA mirror white DRL's,exterior + interior leds, AndyMac's Sub upgrade, H&R springs, VMR VB3 18x8.5 gunmetal alloys wearing BF Goodrich G-force 235/40

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    Quote Originally Posted by Fast,not furious View Post
    ?? ...ermm,how come mine makes this phsssst noise (i don't think its quite as noticable as the Scoobies and Evo's)

    Im running the standard OE diverter,but the noise started happening immediately after installing the Forge CAI.

    Theories? Does anyone else with a CAI notice this?

    You will just be hearing the turbo spooling through the new filter as theres less restriction etc now.

    2003 Audi S3 + Go faster bits

  12. #11
    Fast,not furious's Avatar
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    I heard the turbo spooling when i had the map put on,it's a different sound to the one i'm hearing now,this one's much louder and a different pitch,it's a definite whoosh,usually when i come off the gas to change gear?


    S3 Brilliant Red - 340bhp

    Custom Code Phase 2 + PSS, Autotech pump, Hybrid Forge/ITG Maxogen CAI /Reflactagold, Sprint Booster, Forge Quickshift, Forge DV, Denso Iridium sparks, PCV mod/oil catch can, R8 oil filler cap, Sachs performance clutch,Exhausts UK custom stainless TBE, Braille no-weight battery,PIAA mirror white DRL's,exterior + interior leds, AndyMac's Sub upgrade, H&R springs, VMR VB3 18x8.5 gunmetal alloys wearing BF Goodrich G-force 235/40

  13. #12
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    Quote Originally Posted by wesley View Post
    Do they sound good sarah and do they affect the performance at all?
    Hi
    No it wont affect performance at all
    Sarah

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    Quote Originally Posted by sakkie69 View Post
    It has a diverter valve, instead of venting excess boost to atmosphere (for pssst) it returns it. You can add the Forge spacer which vents and makes that noise, but the amount of air in the system is metered - so if you vent some air the car will be running lean for a little bit every time you vent (ie change gears)
    If you dump some air, you'll be running rich, not lean...
    S3 8P + Milltek non-resonated exhaust = Fuel-to-noise converter

 

 

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