open filter / removing the air filter's box / induction kit

Hi i would like to remove the air filter's box to get more air to the filter. I got something like this now and it;s pretty well but i would like to improve it. I know about the MAF



I would like to remove air filter's box but I'm afraid of water and sand. What do you think??
Thanks a lot

That is not good, that looks like a cylindrical filter, if so there will be unfiltered air flowing right up the centre, coating your MAF in dust. If you want to try something like this you need to remove the filter box and attach a cone shaped filter to the end, so no air can flow past your MAF without being filtered.. Get this sorted quick!

i'm sorry but i can't understand. What shoul i change?? I got a kn filter not a replacement air filter . So whtas wrong with it?? It's prepared to filter the air, isnt it??
Are you sure I can remove air filter box without risk of getting water to the filter??

Is the filter shaped like this (cone filter):

http://www.andysautosport.com/images...one_filter.jpg

Or like this (cylindrical filter):

http://www.ftginc.com/FTG%20AIR%20FILTER.jpg

A cone filter is fine, but a cylindrical filter is not.

ok. Mine is the cone filter. The second one is the replacement filter and i don't have it. The question is if I should keep the air filter's box?? Or not

If its a cone filter, then no, it does not require the box...infact having it inside the airbox, kind of defeats the object of a cone filter! lol

i know all this but I'm a little afraiad of water because my tray under engine is to thort to secure the filter.

I don't know my way around the 156 filter, so excuse me if I ask stupid questions;
Is the filter box (which you want to get rid of) still connected to an air intake somewhere? If so, then I would leave the setup alone; if you remove it, you'll get hot air from behind the radiator instead of cool air from the intake. Bearing in mind that the original system was sized for the engine airflow, and you've got a big gap around the top, I doubt that you'll get any benefit in airflow from removing the original box.

If the original air filter housing is anything like what i have on the gtv, it just has an open hole in to the wing and thus makes the filter housing useless when used wth a cone filter as you no longer have a pull of air.

If the cylindrical filter housing is ported to the front of the car this then creates air flow straight at the filter and this makes this worth keeping. However, its best to port cooler air other than allowing your car to suck in warm air from around the engine bay, i was told that this can increase fuel consumption due to somthing about air being more dense when warm. google it.

Originally Posted by SamGTV

its best to port cooler air other than allowing your car to suck in warm air from around the engine bay, i was told that this can increase fuel consumption due to somthing about air being more dense when warm. google it.

You're a bit mixed up there. COLD air is denser (Warm air rises rememeber) The denser the air is the better it burns, think about the top of a mountain, the air is really thin, its hard the breathe, same for your car, thinner (warmer) air makes life harder for it and results in a poorer burn (with potential for loss of power)

It shouldn't affect fuel consumption really as long as the engine is getting up to temp properly. However if the air was really warm or thin (high altitude) then the car would be putting a lot of effort into each burn, which would reduce the fuel economy slightly (more so depending on the extremity of the situation)

To sum up, cars love to eat cold air as it is denser.

maybe you know if anyone has a filter without the box and tried it during the winter??

Originally Posted by Sam O'Keefe

To sum up, cars love to eat cold air as it is denser.

Easy way to know this is true - you know how crisp your car feels on a cold winter's morning.

So... why do you want to take away the box? It's not causing any restriction to the airflow as it is, and it's helping you get cold air to teh engine, rather than warm.....

i think I coul get more air without the box but... i'm afraid of water. i got the cover thats why the heat isnt my problem

If you look at the amount of flow area you have for air to get in at the top of the box and through the original air intake, it is significantly more than anywhere else in the inlet system. The vast majority of the pressure drop you will be getting is through the filter itself, not through the inlet.

I don't understand why you say you have a cover so heat wouldn't be a problem; if you suck warm air in from behind the radiator, then a cover isn't going to help?

yes but warm air will not get from the radiator. The filter also there is isolated.

The filter housing in the 156 is located below and slightly behind the headlight. If you remove the housing then it will be fairly isloated from warm air. The cover should be fitted towards the engine side to deflect heat away from the filter. Also, try to keep the intake pipe (the short pipe that feeds the airbox) in place to provide a feed of cooler air. Directing a pipe to the front could work but allow enough room at the end of the feed pipe for water to escape during a rainfall without reaching the filter as this could potentially destroy your MAF. Sand shouldn't be a problem because that's what the filter is there for. To stop sand. And dust, etc.

Don't over-oil your filter as excess oil may also be sucked in and destroy the MAF.

The best move would be to fit a K&N direct replacement filter, then fit the GTA intake pipe to the airbox. This pipe has a much higher flow capacity and will allow more air into the filter box, unless ofcourse you are already driving a GTA which doesn't seem to be the case from the pix provided

Hope this info helps!