Results 1 to 10 of 10

Thread: I can hear the turbo and dump valve loudly through the air vents - please help

  
  1. #1
    Status
    Offline
    greg thomson's Avatar
    AOC Newbie
    Join Date
    Apr 2010
    Posts
    29
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    I can hear the turbo and dump valve loudly through the air vents - please help

    Hi Everyone

    I swear I saw another thread on this a few days ago but cant for the life of me find it. Ok so yesterday I finally managed to get hold of a Astra Coupe Turbo (YEY). It needs a few bits fixing on it but was cheap enough to compensate.

    My question is that I can hear the turbo spool up and the dump valve really loudly through the air vents (in paticular the drivers side ones). Ive had a few turbo'd cars in the past but nothing that sounds like this.

    Please can anyone point me in the right direction as to what it could be or indeed the other post which I seem to have lost.

    Thanks
    greg

  2. #2
    Status
    Offline
    BMAstra's Avatar
    AOC Obsessed
    Join Date
    Aug 2009
    Posts
    1,588
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    really interesting one there, any chance of a video to try and hear whats going on

  3. #3
    Status
    Offline
    Coupe John's Avatar
    AOC Obsessed
    Join Date
    Aug 2007
    Drives
    Astra 1.8vvt X Pack
    Location
    Leeds
    Posts
    2,594
    Mentioned in
    17 Post(s)
    Quoted
    61 Post(s)
    could someone before have modded the bottom of the airbox? it may have holes drilled in the bottom of it. this could be why you are hear the sound through the bulkhead and into the car. Ive modded mine and the back with holes as it was always storing water in one corner in winter. So mine is heard through the dash, only other ting it could be is a old vacuum pipe behind the dash for a boost gauge which has been fit before.

  4. #4
    Status
    Offline
    greg thomson's Avatar
    AOC Newbie
    Join Date
    Apr 2010
    Posts
    29
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    thanks for the replies guys. Unfortunately I dont have a video camera so I video is not possible.I have decided it is definitly coming through the drivers side rather than the passenger side.

    I am not too good with cars so please do bear with me here. I think I can rule out the airbox as it has a k+N air filter (I take it I am right in assuming the whole air box will have been removed for this?). I will however check the connection on the air filter to make sure it is tight.

    An old vacume pipe sounds like it could be the job. When fully boosting there is still what sounds like a bit of leakage / suction although not much. From previous experiance with turbos the suction completly stops when on full boost. Is that correct or am I talking crap?

    Where is it likley an old vacume pipe would be for me to be able to check?

    Thanks again.
    Greg

  5. #5
    Status
    Offline
    BMAstra's Avatar
    AOC Obsessed
    Join Date
    Aug 2009
    Posts
    1,588
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Where you from out of interest

  6. #6
    Status
    Offline
    greg thomson's Avatar
    AOC Newbie
    Join Date
    Apr 2010
    Posts
    29
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by BMAstra View Post
    Where you from out of interest
    Fareham in Hampshire

  7. #7
    Status
    Offline
    greg thomson's Avatar
    AOC Newbie
    Join Date
    Apr 2010
    Posts
    29
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    had a look to see if there was a pipe for a boost gauge but nothing there. Its really frustrating trying to work out where it is from. it sounds like the air vent to the right on the drivers side but donest seem to make any difference if I close the vent. Any other sugestions??

  8. #8
    Status
    Offline
    greg thomson's Avatar
    AOC Newbie
    Join Date
    Apr 2010
    Posts
    29
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    any other sugestions?? Anyone else had a similar problem?

  9. #9
    Status
    Offline
    KevT.'s Avatar
    Yorkshire RO
    Join Date
    Jul 2005
    Location
    Bradford
    Posts
    9,218
    Mentioned in
    7 Post(s)
    Quoted
    15 Post(s)
    try removing the k&n and fit the standard air box and see what happens then

    AOC top 15 car at PVS 2009 & 2010
    313.7bhp/343Ibft


  10. #10
    Status
    Offline
    Rainey88's Avatar
    AOC Fanatic
    Join Date
    Nov 2009
    Location
    Scarborough, North Yorks
    Posts
    890
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Yeah was going to say , i had a K&N on mine could hear it spooling up and dumping quite loud through that until i put standard airbox on , now cant hear the turbo spooling just a little hiss from dv cant hear it if i have the radio on.

Similar Threads

  1. What is the Best Dump Valve/Blow off valve for Coupe Turbo
    By Turnerator in forum Turbo Petrol Engines inc. Transmissions
    Replies: 15
    Last Post: 27-06-2011, 20:41

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •