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  1. #1
    VXRed
    Join Date
    12th April 2017
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    13

    Default Choosing & fitting a Dump Valve

    Recently I have bought an Astra vxr 2litre turbo 57 reg, I absolutely love it
    It's had dreamscience remap applied and to put it simply it's fast as you know what.
    Only think it's missing is a dump valve, I love the sound they make.

    However, I'm unsure which one to buy?... I want something nice and loud
    To go with the upgraded exhaust system.

    Can anyone shed and light / experiences that they have had with them
    Thank you

  2. #2
    VXR enough W18ACK's Avatar
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    3rd March 2013
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    1,399

    Default

    Wouldn't bother with Dump valve, these engines don't like them.

    Take the generic dream science remap off and get a custom one. Courtenay sport, rabbid/WG motorworks etc remap. Then you'll feel how good/fast the car really is.


    Sent from my iPhone using Tapatalk

  3. #3
    VXR Nothing comes close VXRRy's Avatar
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    15th May 2013
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    15,875

    Default

    Quote Originally Posted by W18ACK View Post
    Wouldn't bother with Dump valve, these engines don't like them.

    Take the generic dream science remap off and get a custom one. Courtenay sport, rabbid/WG motorworks etc remap. Then you'll feel how good/fast the car really is.


    Sent from my iPhone using Tapatalk
    This......👍🏼

    Also if you want pssshhhttt and whooshing noises then get a direct route pipe and cone filter





    Sent from my iPhone using Tapatalk

  4. #4
    VXRacing ahead
    Join Date
    25th January 2010
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    748

    Default

    Dump valves on a Astra vxr -- no don't do it they don't like them -- like been said get a custom map done on a rolling road you will be amazed at the difference

  5. #5
    VXRed VinPetrol's Avatar
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    13th June 2016
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    191

    Default

    Yeah agreed, don't bother. Fit a cone filter and a crossover delete and you don't need one. Then you can spend the money you've saved on something worthwhile like a RARB! Win Win!

  6. #6
    VXR Nothing comes close VXRRy's Avatar
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    15th May 2013
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    Quote Originally Posted by VinPetrol View Post
    Yeah agreed, don't bother. Fit a cone filter and a crossover delete and you don't need one. Then you can spend the money you've saved on something worthwhile like a RARB! Win Win!
    Deffo the RARB!!


    Sent from my iPhone using Tapatalk

  7. #7
    VXRed
    Join Date
    12th April 2017
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    13

    Default

    Quote Originally Posted by W18ACK View Post
    Wouldn't bother with Dump valve, these engines don't like them.

    Take the generic dream science remap off and get a custom one. Courtenay sport, rabbid/WG motorworks etc remap. Then you'll feel how good/fast the car really is.



    Sent from my iPhone using Tapatalk
    Wow, wasn't expecting that response from everyone :-( lol
    When you say the engines don't like them what do you mean?
    As it it can mess up the engine? It slows it down? Causes damage?

  8. #8
    VXRed
    Join Date
    12th April 2017
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    13

    Default

    Quote Originally Posted by VXRRy View Post
    This......👍🏼

    Also if you want pssshhhttt and whooshing noises then get a direct route pipe and cone filter





    Sent from my iPhone using Tapatalk
    Sorry, when you say a direct route and come filter, what do you mean? Does this give the same sound as a dump valve

  9. #9
    VXRed
    Join Date
    12th April 2017
    Posts
    13

    Default

    Quote Originally Posted by Brother Leo View Post
    Dump valves on a Astra vxr -- no don't do it they don't like them -- like been said get a custom map done on a rolling road you will be amazed at the difference
    When you say custom map, what do you mean? Thanks

  10. #10
    VXRed
    Join Date
    12th April 2017
    Posts
    13

    Default

    Quote Originally Posted by W18ACK View Post
    Wouldn't bother with Dump valve, these engines don't like them.

    Take the generic dream science remap off and get a custom one. Courtenay sport, rabbid/WG motorworks etc remap. Then you'll feel how good/fast the car really is.


    Sent from my iPhone using Tapatalk
    Hey still quite new to all this. When you say "generic dream science" what is wrong with this map? The car is almost to quick as it is!

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