1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Which intake stops the blow off noise?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by jk_s3, Dec 18, 2012.

  1. jk_s3
    Offline

    jk_s3 Member

    Joined:
    Mar 13, 2011
    Messages:
    91
    Likes Received:
    0
    [Dec 18, 2012]
    Ive been doing some research into the different intake kits for the s3. ive watched some videos on youtube, one of the evoms and one of the forge twintake and i really like the induction noise from both but am not a fan of the blow off/diverter valve/wastegate noise, (which ever of these it may be)

    My question is; is there anyway of reducing this blow off noise? by changing the valve or by any other means?

    thanks in advance for your help.
    #1
  2. Ads

    Ads

    [Oct 1, 2014]

  3. Kelza
    Offline

    Kelza MODERATOR Staff Member Moderator VCDS Map User

    Joined:
    Oct 29, 2010
    Messages:
    2,656
    Likes Received:
    380
    [Dec 18, 2012]
    Hi jk just keep the revised d value and dont fit the forge blow off value and you will be fine :)
    #2
  4. mookster
    Offline

    mookster Member

    Joined:
    Dec 6, 2012
    Messages:
    159
    Likes Received:
    15
    [Dec 19, 2012]
    Most turbo cars are fitted with a recirculating dump valve as standard, which I'm guessing is the 'revised d valve' s3kel mentions above. Keeping it that way will keep it quiet.

    Turbo produces additional pressure over and above atmospheric pressure to enable more air to be forced into the engine - more oxygen - more power. When the throttle plate closes the extra pressure has nowhere to go and can then backup through the turbo, stalling it so it's not up to speed when you engage the accelerator again. Over time it can also add strain onto the veins of the compressor wheel shortening its life. However, the dump valve allows the additional pressure to be vented off so the turbo stays spinning and is bang on it when you put your foot down again.

    A recirc valve puts that vented air back into the intake pipework, which 'contains' the whoosh noise. Aftermarket valves like to vent to atmosphere and tend to do so through various designs of trumpets and aparatus to increase and alter the sound created.

    In basic terms, keep your recirculating dump valve and there'll be no additional noise :sly:
    #3
  5. Jonse
    Offline

    Jonse Active Member

    Joined:
    Oct 28, 2012
    Messages:
    379
    Likes Received:
    39
    [Dec 19, 2012]
    I thought the revised version D made a similar noise as the forged one?
    #4
  6. Kelza
    Offline

    Kelza MODERATOR Staff Member Moderator VCDS Map User

    Joined:
    Oct 29, 2010
    Messages:
    2,656
    Likes Received:
    380
    [Dec 19, 2012]
    Hi mate , totally different value as the forge one ,sits on top of the oem value , just keep it as it meant to be and you will be fine..
    #5
  7. Boydie
    Offline

    Boydie Boycie VCDS Map User

    Joined:
    Dec 24, 2006
    Messages:
    2,842
    Likes Received:
    192
    [Dec 19, 2012]
    My ITG made the car chatter with the Rev D valve but I love it personally!
    #6
  8. Broken Byzan
    Offline

    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

    Joined:
    Apr 26, 2004
    Messages:
    12,607
    Likes Received:
    278
    [Dec 19, 2012]
    The quitest intake is the oe airbox tbh
    #7
  9. jk_s3
    Offline

    jk_s3 Member

    Joined:
    Mar 13, 2011
    Messages:
    91
    Likes Received:
    0
    [Dec 19, 2012]
    Thats what i thought!! i guess changing the panel filter is pointless is it?
    #8
  10. Boydie
    Offline

    Boydie Boycie VCDS Map User

    Joined:
    Dec 24, 2006
    Messages:
    2,842
    Likes Received:
    192
    [Dec 20, 2012]
    I changed mine to an ITG panel and noticed no difference.
    #9

Share This Page