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    Thread: Anyone with TTRS notice boost coming on later/higher rpm?

    1. Member
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      10-05-2012 12:32 AM #1
      Has anyone noticed that their turbo surge is coming on at higher rpms than it did in the past? The surge in power from the turbo kicking in came in around 2500-2750 rpm before, now it is around 3500rpm. The one thing i did notice is the sound of rattling before the turbo kicks in, and then a thwump noise(not real loud, like the sound of a vacuum closing) and then the car goes. Past experience has me leaning towards wastgate or actuator not closing tightly(the rttle and delay in power) then when it does(thwump).
      Does anyone know where the wastegate is located on the engine. I would like to see if the actuator arm is loose or if there is any play in it.
      Anyone have any ideas ?
      Thaks

    2. Member J662's Avatar
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      10-05-2012 02:31 AM #2
      I haven't noticed a change like you've described.


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      10-05-2012 05:34 AM #3
      I haven't noticed this, either.

      - Jeremy -

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      10-05-2012 09:14 AM #4
      No. And if you watch the little graphic boost gauge (and seat of the pants dyno), I'd say I can already feel boost as low as 2K rpms. That's one of the things I love about turbo motors (and this one is the best example yet I've driven) is the wall of torque that starts lowdown and stays pretty flat until near redline.
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      10-05-2012 09:18 AM #5
      In 15.5k miles of ownership I have not noticed this. Definitely sounds like something is wrong.
      Current: 2015 Subaru WRX STi Launch Edition
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      10-05-2012 12:27 PM #6
      Quote Originally Posted by Quisp View Post
      Has anyone noticed that their turbo surge is coming on at higher rpms than it did in the past? The surge in power from the turbo kicking in came in around 2500-2750 rpm before, now it is around 3500rpm. The one thing i did notice is the sound of rattling before the turbo kicks in, and then a thwump noise(not real loud, like the sound of a vacuum closing) and then the car goes. Past experience has me leaning towards wastgate or actuator not closing tightly(the rttle and delay in power) then when it does(thwump).
      Does anyone know where the wastegate is located on the engine. I would like to see if the actuator arm is loose or if there is any play in it.
      Anyone have any ideas ?
      Thaks
      Maybe you're just getting used to the power?
      2012 TT-RS in Suzuka Gray

    7. 10-05-2012 02:02 PM #7
      APR tune?

    8. Member
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      10-05-2012 10:31 PM #8
      My mk6 GTi does this a bit (second car)... I'd guess there's probably something wrong with the wastegate actuator or something.

      Bet it's not closing properly - hence the issue with coming on boost slower.
      2010 Audi TTRS (6spd)
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      10-05-2012 11:27 PM #9
      I had this problem with my BMW and it was wastegates. I am fairly certain it is the same thing. There is a rattle as i accelerate(the wastgate not sealing) then the rattle stops and that is when the power comes on. From what i understand the actuator arms are welded so they are not adjustable which means if there is a problem it would have to be replaced instead of adjusted.
      Tryng to make a video of the noise and trying to convince the dealership that it is not a normal noise.

    10. 10-06-2012 12:16 PM #10
      Quote Originally Posted by Quisp View Post
      I had this problem with my BMW and it was wastegates. I am fairly certain it is the same thing. There is a rattle as i accelerate(the wastgate not sealing) then the rattle stops and that is when the power comes on. From what i understand the actuator arms are welded so they are not adjustable which means if there is a problem it would have to be replaced instead of adjusted.
      Tryng to make a video of the noise and trying to convince the dealership that it is not a normal noise.
      Time for a turbo upgrade?

      Sent from my Nexus 7 using Tapatalk 2

    11. Member J662's Avatar
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      10-06-2012 04:10 PM #11
      Quote Originally Posted by canuckttrs View Post
      APR tune?
      Lol


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    12. Member RisR32's Avatar
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      10-08-2012 10:53 AM #12
      Quote Originally Posted by canuckttrs View Post
      APR tune?
      Truth... With the APR tune the turbo spools much later in the RPM band. But the power gain is phenomenal

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