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Thread: Airbox Mod!!

  1. #1
    Regular Member R-ford_Vec_C's Avatar
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    Thumbs up Airbox Mod!!

    Hi guys, decided id do the airbox mod last night, so drove to southport (approx 25miles) and averaged 49.6mpg, did the airbox mod and drove back averaging 54.2mpg. Purposely did it quite late so I had the same traffic condition in both directions. The car seemed more eager to rev hench not needing to use the throttle pedal as much and noticably more eager to pull, esspecially between 2000-3000rpmso all in all, a worth while mod!!!!

  2. #2
    Regular Member john_k_sri's Avatar
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    Vehicle : Vectra

    Trim : SRI NAV XP

    Engine : 1.9 CDTI 150

    Year : 2007

    Mileage : 72K

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    Quote Originally Posted by R-ford_Vec_C View Post
    Hi guys, decided id do the airbox mod last night, so drove to southport (approx 25miles) and averaged 49.6mpg, did the airbox mod and drove back averaging 54.2mpg. Purposely did it quite late so I had the same traffic condition in both directions. The car seemed more eager to rev hench not needing to use the throttle pedal as much and noticably more eager to pull, esspecially between 2000-3000rpmso all in all, a worth while mod!!!!
    Yup, airbox mod really worked for me too, on both my old 2.0T and the 1.9CDTI I now have. Simply improves airflow into the engine and can smooth out flat spots.

    Southport bypass is a good proving ground, even for speed testing (allegedly)

  3. #3
    Regular Member R-ford_Vec_C's Avatar
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    Quote Originally Posted by john_k_sri View Post
    Yup, airbox mod really worked for me too, on both my old 2.0T and the 1.9CDTI I now have. Simply improves airflow into the engine and can smooth out flat spots.

    Southport bypass is a good proving ground, even for speed testing (allegedly)
    Lol according to who!!! John_K_SRi by any chance???

  4. #4
    Regular Member si_hoss's Avatar
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    Hmmm - I have the DTI - might venture into doing mine tonight as up to Brum tomorrow for work. Be a nice long run (110miles from here) to see if any differences.

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    What is the mod ?

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    if its anything like all other vauxhalls, open airbox, take the NVH trumpet out of the engine side of the airbox (usually unclips) and if you want, shorten the pipe in the bottom/atmosphere side of the box. New paper airfilter.

    Done.
    Mildly better noise and better performance and or economy.

  7. #7
    Regular Member dolf.peeters's Avatar
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    its the little cover on the inlet of the air to the box rather than the pipe exiting the box towards the engine

  8. #8
    Regular Member luke.oldham's Avatar
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    ive took both off and never had a problem.only felt a differance when i did the top one.but some people dont advise takeing the top one off .not sure y

  9. #9
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    the top cone is only for NVH rubbish... we want induction noise FFS

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