and another thing...about teh AFM

[ffonseca]

Hello All,

If you want to have a real air filter go the carbon fiber way!
It's the only way to have proper cold air into the AFM, other wise you will have a more eficcient airflow, but with warm air coming from the engine bay!

To have a proper air intake you will have to get an air tunnel from the front grille directed to the air filter and with a carbon fiber case, such as these ones from BMC www.bmcairfilter.com

And they are available to our cars.

Regards
Frederico

[Jeroen]

That's why my car has a shield between the radiator & engine and the filter. And the front grille opened up a bit more like between the headlights!

[hardtailer]

what always amazes me is the fact that these cone filters are fitted in such a way that after the bonnet is shut, half of the cone is almost blocked off by it...
I am a believer of the original setup with a new / clean OEM filter. After all it seems to flow enough to get 238 bhp out of it.

[Jeroen]

Yep, that's why my cone on the 325i is pointing downwards and why I've opened up the front grille more. On the 325i that is. If I want to improve further I guess I should remove the left front high beam unit I guess. Using a A/F ratio meter I should be able to adjust the mixture but the problem is the difference in air flow at different speeds. That's why it'll stay like this for now.

On the 320iS I run the stock intake box and filter. Not sure if changing to the larger lower air box will give any gains... any experiences there?