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Thread: Advice needed on breathing

  1. #1
    Regular Member Itsallrover's Avatar
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    Default Advice needed on breathing

    Hi, I have recently picked up a 2002 Vectra Gsi. Would like to know whats best a panel filter or cone? Can anyone recommend anything as I have seen whats available but I dont wanna buy something ****e.

    Cheers

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    Regular Member parapaul's Avatar
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    General opinion is to avoid cone filters - there's not enough cold air to make any difference. Get a K&N panel filter, and derestrict the airbox (in the how2 section).

    HTH

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    Regular Member nutron's Avatar
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    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

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    Having said that, I tried lots of filters in mine to see which gave the best result and found that the foam mushroom came up No1. On your's, you would do well to do as said because it's naturaly asperated. Also there may be a piece of plastic behind the upper grill, deflecting direct airflow. Remove that and you should get a bit of ram induction at speed.

  4. #4
    Regular Member Itsallrover's Avatar
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    Quote Originally Posted by parapaul View Post
    General opinion is to avoid cone filters - there's not enough cold air to make any difference. Get a K&N panel filter, and derestrict the airbox (in the how2 section).

    HTH
    Thats good because the panel filters are way cheaper. I have looked in the how 2's and cant find out how to derestrict the airbox

  5. #5
    Regular Member parapaul's Avatar
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    Regular Member Gsi3.2's Avatar
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    do it..... works fine in our 3.2's..

  7. #7
    Regular Member Itsallrover's Avatar
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    Quote Originally Posted by Gsi3.2 View Post
    do it..... works fine in our 3.2's..
    Cool will defo do it - the box mods seems far too easy but I like it. Are you using a k&n too? Does the panel filter make any noise or is it just a cone filter which does that

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    Regular Member nutron's Avatar
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    Vehicle : Vauxhall

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    The performance panel filter may make a little more noise but it's negligable. Cones can make an amazing amount of noise though!

  9. #9
    Regular Member simon7257's Avatar
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    my previous job included work on a rolling road and i found that the replacement panel filters worked well after all the manufactures spent a long time getting cold air in but cone filters can be better if you use a proper heat shield and get a direct air flow plus they sound better

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