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Thread: 2.0T dump valve sound?

  1. #1
    Regular Member benholden2010's Avatar
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    Post 2.0T dump valve sound?

    Had my 2.0T a week now and love it!

    I was told this these engines do not have a dump valve as such, but something similar that dosent make the stupidly loud 'PSTTTTT' that some turbo charged cars do.

    However, if i'm really giving her some i can hear the turbo whining up, then followed by a suttle 'pstttt' when i change gear, is the right? or could it be a possible air leak?

    quite a novice when it comes to these engines so excuse me if this is a stupid question

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    Mine does it, just a small psst as you change. More pronounced when going from 3rd to 4th.

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    Regular Member bangty 1's Avatar
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    im sure you can fit a big boy BV if you like but im not 100% sure someone on here did it tho

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    Regular Member chuckleuk's Avatar
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    Yes my 2.0turbo also does it, I like to think of it as a sophisticated psst rather than the chavvy dump valve

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    Regular Member Jezzy's Avatar
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    Probably the bypass valve - when you change gear, the boost bypasses the cylinders but allows the turbo to keep spinning, so that it will reboost quicker when you step on the accelerator again; an improvement on less sophistiacted designs where the boost gets blocked when you take your foot off the accelerator and the blockage slows the turbo down.

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    Vehicle : Vectra

    Trim : Design

    Engine : 1.9CDTi

    Year : 2005

    Mileage : Lots

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    Believe they're fitted with recirculating dump valves as standard which explains why they're so quiet. You can get some that are split (think Bailey make one) that releases some to atmosphere for noise but diverts some back like the OEM one does to keep the turbo spooled.

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    Regular Member bangty 1's Avatar
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    Quote Originally Posted by chuckleuk View Post
    Yes my 2.0turbo also does it, I like to think of it as a sophisticated psst rather than the chavvy dump valve
    luck i dont have my scooby no more you could hear that miles away lol only 22 so still a chav

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    Regular Member benholden2010's Avatar
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    Oh well as long as it's normal.

    Sounds quite nice! Have a mate with a performance ford turbo and that dosent half dump! Quite annoying after the first few times

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    Regular Member bangty 1's Avatar
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    Quote Originally Posted by benholden2010 View Post
    Oh well as long as it's normal.

    Sounds quite nice! Have a mate with a performance ford turbo and that dosent half dump! Quite annoying after the first few times
    you mad i loved that sound i mite fit one to my diesel i like it so much...........i know its a diesel but still lol

  10. #10
    Regular Member benholden2010's Avatar
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    I love the sound! It's great when your thrashin it, but not to great when your crusing round town with the wife and kids and there's a psttttt after every gear change, but maby I'm just old and boring

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