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Thread: Does the airbox mod affect fuel consumption?

  1. #1
    Regular Member TopRod's Avatar
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    Default Does the airbox mod affect fuel consumption?

    Am I right in thinking that this mod involves cutting out the extra bit of tubing inside the airbox? Firstly what benifits does this give you? Once it's done will it affect fuel consumption? Any pics of an airbox with this done would be nice.

    Thanks

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    Regular Member bigdave1701's Avatar
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    More airflow so in theory better performance but the reality is you'll probably not notice any difference.

    Oh and no, it doesn't alter the fuel economy

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    Regular Member Handyandy-UK's Avatar
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    Vehicle : BMW 525i

    Trim : SE Touring

    Engine : 3.0

    Year : 2007

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    The only change in economy I can vouch for is that the vast majority of the air filter element surface is being used once that air guide is removed, rather than something like 40% of the filter element being used with the guide in place.

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    Regular Member paul_sri150's Avatar
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    it improves airflow into the box and as said above mate it lets the whole airfilter be used instead of half of it (you'll see for urself when u open arbox)

    does run smoother (IMO) too

    I put another intake in the back of airbox aswel ste, pics are somewhere in diesel tuning section

  5. #5
    Regular Member Envy's Avatar
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    Vehicle : Vectra C

    Trim : SRi Nav

    Engine : 1.8 VVT

    Year : 2006

    Mileage : 130k

    Default

    I did this on my 1.8 vvt and it got rid of the standard judder in 1st when pulling away. Made the car much smoother to drive as well. Have not seen much of a difference in fuel economy. I believe I get around 0.2 mpg extra now. What did make my mpg go down though was going to 225/45/17's. I lost around .4 mpg overall

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    Forum Moderator soulman's Avatar
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    Vehicle : Vauxhall

    Trim : Astra Twin Top

    Engine : 1.9cdti

    Year : 07

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    you will probibly get a tiny winy bit better fuel consumption as the throttle response is better ....so once you have stopped booting it and gone back to normal driving it will be apparent

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    in addition to the above...
    there's no need to cut anything, the part in the airbox just unclips, imo you should only be removing the part from the lower half of the box & leave the trumet in the lid in place

  8. #8
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    Year : 06

    Default

    Yer as above just unclips done it on my 150 cdti hear the turbo more but tempted to put it back on as mime seems to be useing fair bit of fuel than used to 30 pound in and couple days nearly gone miles left in tank goes down fast is this normal tho?

  9. #9
    Regular Member Exclusive BV's Avatar
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    I had always suspected that that judder in 1st on a 1.8 VVT is caused by inadequate airflow going to the sensor. If i revved it a few times first and let it settle and then took off, it never juddered so that cant be the clutch.

    This MOD pretty much confirmed it.

    TOPROD:- There is no need to do any 'Cutting'. The part in question just popps off. and if you search the howto section it's all in there.

  10. #10
    Regular Member UltraVec's Avatar
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    Default

    TopRod heres a picture of the box with the funnel removed.
    This is the "1st stage" to the air box mod, very simple.
    Just un-clips and allows the full filter to be used.
    Hopefully the image helps.
    (Excuse the dirt of it)

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