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Thread: Air box mod?

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    Regular Member Mads's Avatar
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    Default Air box mod?

    Sorry to get on this subject again, I have read prev how tos about this but wanted to confirm a few things..... To be safe I think im only going to remove the top plastic part in the airbox to allow more airflow, What I wanted to check mainly is, Do you have to reset your ecu afterward so it can adjust to the mod and am I right in thinking you just disconnect the battery for 15 mins. Thanks in advance

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    Full Member GazVXLINE170's Avatar
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    Quote Originally Posted by Mads View Post
    Sorry to get on this subject again, I have read prev how tos about this but wanted to confirm a few things..... To be safe I think im only going to remove the top plastic part in the airbox to allow more airflow, What I wanted to check mainly is, Do you have to reset your ecu afterward so it can adjust to the mod and am I right in thinking you just disconnect the battery for 15 mins. Thanks in advance
    I didn't and to TBH if you do disconnect the battery you will have to punch the security code into the radio and reset all of the electric windows.

    The ECU will learn the new parameters within 100miles.

    All the airbox mod does is lower the pressure drop in the airbox freeing up abit of horsepower (1-2bhp).

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Regular Member Mads's Avatar
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    Thanks for the reply gazza4... just seemed a waste to see only half the air filter being used/coming in

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    Full Member GazVXLINE170's Avatar
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    Quote Originally Posted by Mads View Post
    Thanks for the reply gazza4... just seemed a waste to see only half the air filter being used/coming in
    You will notice a difference and it makes you angry that the dealer is simply turning you filter round

    But for the better effects get a K&N panel filter

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Regular Member Mads's Avatar
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    Quote Originally Posted by Gazza4 View Post
    You will notice a difference and it makes you angry that the dealer is simply turning you filter round

    But for the better effects get a K&N panel filter

    Gazza4
    Yeah i bet some do do that, is there just 1 type of k&n flat pannel filter for vectra c pre face?

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    Full Member GazVXLINE170's Avatar
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    Quote Originally Posted by Mads View Post
    Yeah i bet some do do that, is there just 1 type of k&n flat pannel filter for vectra c pre face?

    Just put in you engine size in the box on the attached link:

    http://www.knfilters.com/search/appsearch.aspx

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Regular Member Matty H's Avatar
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    Quote Originally Posted by Gazza4 View Post
    You will notice a difference and it makes you angry that the dealer is simply turning you filter round

    But for the better effects get a K&N panel filter

    Gazza4
    Depends I think. I've done both and can honestly it hasn't made a jot of noticeable difference. I've heard people say it removes the flat spots etc. Maybe I was just lucky and my engine never had any flat spots. Certainly a total waste of time in my opinion, although I fully accept it may have worked for others

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    Regular Member 67688c's Avatar
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    I have read many threads on here regarding this mod, and have seen the how2 regarding this. When I took the airbox cover off mine a couple of weeks ago I had a good look at the design of the box and would agree with many of the points made, ie by removing the top it would appear to allow better airflow and use all of the area of the filter.

    My question is this, why did VX design it like this, one would think that their so called profesional highly qualified designers did it like this for a reason. I'm obviously not a car designer but I too can see no logic for basically reducing the airflow by having designed it the way it is. ?

    I settled for just cleaning and turning the filter around so the clean area came into play. It does'nt make any real sense to me why they did it like this. One wonders whether there was infact some valid reason on their part or do we really know better than them.

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    Full Member GazVXLINE170's Avatar
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    If you look at he airbox the plastic fannel you removed is acturlly there to 'focus' the air and increase the velocity of the airflow.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Regular Member MattW's Avatar
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    Noise reduction for the induction systems

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