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Thread: Pipercross or K&N?

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    Regular Member paul_sri150's Avatar
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    Default Pipercross or K&N?

    after taking off my cone filter and putting my box back on, i want to get a high flow panel filter, but which is best? pipercross or K&N?

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    Regular Member george1987's Avatar
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    I have a K&N panel filter and felt the difference with it in. I think it's the most popular one.

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    Administrator Big-Pete's Avatar
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    When I got my car new i ordered a pipercross for it, but after some advice from a guy who had done several tests with airflow etc on the veccy (Karl) It was soon replaced with a K&N..

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    Regular Member paul_sri150's Avatar
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    cheers lads, K&N it is

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    High flow filters will only make a difference when a diesel engine is reaching its full load limit (where it's beginning to chuck out black smoke). At that point more air would be a good thing, but even then the difference from a high flow filter is negligible. Running without a filter (not recommended) won't make much difference to how a diesel engine performs either.

    Unlike petrol engines, diesel engines only require additional fuel to improve performance (hence tuning boxes). A petrol engine requires it's overall breathing to be improved, either by boosting the turbo (if it has one) or by modding things like exhausts, cams and valves etc.
    Last edited by diesel dog; 2nd May 2010 at 20:12.

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    Regular Member winnie2457's Avatar
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    K&n all the way I have always used them in the past and I am getting one for my vectra too. But I have also used green cotton filters too which are also good but more expensive

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    Regular Member mini tony's Avatar
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    k&n mate all the way have fitted all sorts of filtters over the years on all sorts of cars . and all states of tune from standard to full race the k&n always give the best return

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    Regular Member Graeme01's Avatar
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    Quote Originally Posted by diesel dog View Post
    High flow filters will only make a difference when a diesel engine is reaching its full load limit (where it's beginning to chuck out black smoke). At that point more air would be a good thing, but even then the difference from a high flow filter is negligible. Running without a filter (not recommended) won't make much difference to how a diesel engine performs either.

    Unlike petrol engines, diesel engines only require additional fuel to improve performance (hence tuning boxes). A petrol engine requires it's overall breathing to be improved, either by boosting the turbo (if it has one) or by modding things like exhausts, cams and valves etc.
    Y do they turn the boost up then when you get it mapped if you only need fuel?

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    Regular Member Ademusic's Avatar
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    K&N mate

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    Regular Member POAH's Avatar
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    pipercross - K&N clog up significantly quicker (in fact a clogged K&N flows less than a paper element) and need cleaned every 3-5kmiles and re-oiled. the oil will damage the AFM if it leaks through. pipercross will get dirty eventually but it takes longer. cheapest option is to just change the paper element a so called performance air filter won't do squat for a TDi.

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