Jump to content
Do Not Sell My Personal Information

Cone Filter On A Metal?


Recommended Posts

Just wondering has anyone tried to fit a cone filter on the fiesta metal? As when I tried fitting mine the map sensor is attached to the airbox and it throws up the engine management light when turned on. Anyone know how to get around this problem?

Link to comment
Share on other sites

On my Matiz I poked a hole through the pipe with a knife and taped it on lol, that worked. Something like that, just more tidy :P

Or buy a filter with a heat shield and sensor plug.

Link to comment
Share on other sites

Haha I don't think I could bring myself to put a hole in it lol :) think I might go for the filter with heat shield ;) sounds a little more girl proof for me to do haha :)

Link to comment
Share on other sites

There is a few things you should know before you fit a cone filter -

The stock filter was carefully designed to work in all kinds of conditions, to increase bottom end power and keep the induction noise to a certain level, it draws air from a cool place, so less power is lost

If you fit a cone filter under the bonnet, this air is (likey to be) warmer/ hotter, its a bit technical, but the cooler the air going into the engines air intake/ the more power it produces - each induction stroke of the piston/s draws a certain amount of air into the cylinder/s, this is a fixed volume, if the air is cooler, it is denser, so contains more oxegen per square inch

Because efficiency is reduced, more throttle is required for the same effect/ so economy is also reduced

That is how intercoolers work on turbo cars, and production cars have cool air inlets (NA & turbo) since the 1970s

if you put a cone filter under the bonnet it will draw warm air (loosing power) a heatshield does not work (because warm air is still drawn / underbonnet temps can rise like an oven)

If you must modify your air intake - fit a fully encapsulated CAIS (cool air intake system) BMC make one (used on rally/ race cars) and pipercross make one (its called a Venom) - this is a bit like a K&N in a tube (to insulate it from underbonnet heat) - air is drawn from in front of the radiator/ a cool place/ a special intake/ vent

Even with the special CAIS / BMC CDA / pipercross venom, you may loose low down power, this is because the stock filter may be "tuned"/ matched to your engine - to increase bottom end grunt - aftermarket filters work better with large capacity NA or gigh power turbo engines

The induction raar from the cone filter can give the illusion of more power (placibo effect), and the (possible) drop off in bottom end power can give the illusion of more midrange or top end power

So unless you are an engineer, a tuner or a genius (or better still, all 3!) its unlikely you can improve on Fords testing/ multi-million pound R&D department

So you will lose overal power/ economy/ and probably bottom end grunt - but make more noise

If the "more noise" part is the important bit to you, use a CAIS or fit some cool air ducts - otherwise - i recommend you stick to the stock filter!

Another option is a K&N of Pipercross panel filter, not the drawbacks/ hassles of the cone filter/ more flow (allegedly!) a bit louder, easy to fit, and you wont have to inform your insurers because an air filter is a consumable!

nuff said

Link to comment
Share on other sites

^ The more expensive cone filters with the custom heat shield are actually good, they take air from the original point and seal it like a box, only allowing air from down below and in front of the filter, rather than everywhere.

I lost 4bhp on something with around 70 with a cone filter, all I've done now is slap in a K&N panel, absolutely no difference, but I like the fact it just needs cleaning :P

Link to comment
Share on other sites

Yes, i agree,


this is the kind i meant (non - encapsulated heatshield), used to be popular on Mondeos and Focuses,

Still draws warm air from under the bonnet (so looses power)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...