K&N vs BMC air filters

[jonf49]

Originally Posted by Wanted_M

K&N, no issues.

Originally Posted by mapster37

K&N drop ins with charcoal filters removed. Definitely have more intake sound/turbo spool

Originally Posted by JAI///M3

I chose K&N because it’s easier to spell. You should be good with either. Might as well do the charcoal filter delete. It’s a nice little upgrade

Originally Posted by djpeetur

Any of those will be fine. Drove 50k with aftermarket intake had rough idle, and too many tuner codes. Dropped in K&N, but cant go wrong with either. Now my car is running with no CEL or codes.

I did order the K&N but read in the comments that the filter comes with a lot of oil on it. Did any of you find this concerning? Did you wipe some off?

[JAI///M3]

I didn’t think mine were over saturated out of the box. If you’re really concerned you could use the filter recharge kit to clean and re-oil the filters before installing them. I dropped mine right in though

[mapster37]

Did not seem excessive to me

[2sporty]

Originally Posted by jonf49

What’s the point of build quality if people previously complained about loss of throttle response / power down low. I was about to go with the k&n for that reason. It seems the dyno shows them making the same ~5hp up top… but is there any dyno proof that the BMC outperforms the K&N and that the loss of power in the previous owners car was a fluke?

If you're one of those people buying these for "the power", you're one of those people..... you know what I mean.

[TopJimmy]

Originally Posted by jonf49

I did order the K&N but read in the comments that the filter comes with a lot of oil on it. Did any of you find this concerning? Did you wipe some off?

Oil catches the smaller particles. Leave as is and run it.

[powerbait]

I lean towards K&N after the red surround material on my E92's BMC filter started crumbling and I found bits of in the intake manifold. K&N with charcoal filters removed on the F80 for the last 24k of its 25k miles.

[Metalm4]

Originally Posted by jonf49

Want to drop in some replacement air filters on the f82. Two that have come to my attention are the K&N and the BMC.

Thoughts and opinions appreciated!

Stay with your stock filter, as you won´t have more sound nor more power nor less costs.
And you don´t put your turbos at risk

[mike@x-ph.com]

Originally Posted by Metalm4

Stay with your stock filter, as you won´t have more sound nor more power nor less costs.
And you don´t put your turbos at risk

You get more sound from higher flow filters or intakes, but thats not debatable, as you can easily hear it as soon as you replace the intake.

As mentioned earlier, customer threads showed increased power by only upgrading the filters.

Please post data on the risks. I have not heard of a single turbo failing after an upgraded filter.

[Metalm4]

Everyone who has a little knowledge about modern supercharged direct injection engines knows, that injection and turbos are responsible and controlling the amount of air and airflow and not a filter with a little bit more throughput, which additionally can cause little particle flowing through and may harm the turbo.

[2sporty]

I am sorry, but that was just incomprehensible.

[Metalm4]

Originally Posted by 2sporty

I am sorry, but that was just incomprehensible.

In German:
Mit einem Sportluftfilter erzielt der Motor keine signifikant höhere Leistung. Untersuchungen der DEKRA und des TÜV konnten nach Einbau eines Sportluftfilters keine Leistungssteigerung feststellen. Sogar eine Leistungsminderung ist nicht ausgeschlossen.

Additionally Germany´s ADAC also tested:

https://www.adac.de/rund-ums-fahrzeu...g-sportfilter/

[mike@x-ph.com]

Originally Posted by Metalm4

Everyone who has a little knowledge about modern supercharged direct injection engines knows, that injection and turbos are responsible and controlling the amount of air and airflow and not a filter with a little bit more throughput, which additionally can cause little particle flowing through and may harm the turbo.

You made 3 points in your post
1- sound
2- power
3- risk

I answered all of them clearly, so you decided to ignore 2 of them since it's not even debatable.

You assume no power will be gained with higher flow filters/intakes on any turbo engine.

The data posted during the last 15 years show that you are correct with some BMW engines and you are incorrect with others.

The S55 is one of the engines proven to make some power with higher flow filters/intakes.

I can quote as many articles as I want to support my theories, but at the end of the day, the data is what matters.

[HotRodM4]

https://youtu.be/GS69owXpGdY

[EezyBeezy]

I may try out aFe Power's Magnum FLOW Pro DRY S drop-in air filters and their Dynamic Air Scoops.

Link - Magnum FLOW Pro DRY S Air Filters

Link - Dynamic Air Scoop (D.A.S.)

[mike@x-ph.com]

Originally Posted by EezyBeezy

I may try out aFe Power's Magnum FLOW Pro DRY S drop-in air filters and their Dynamic Air Scoops.

Link - Magnum FLOW Pro DRY S Air Filters

Link - Dynamic Air Scoop (D.A.S.)

we have them in stock and ready to ship

[AmuroRay]

Originally Posted by EezyBeezy

I may try out aFe Power's Magnum FLOW Pro DRY S drop-in air filters and their Dynamic Air Scoops.

Link - Magnum FLOW Pro DRY S Air Filters

Link - Dynamic Air Scoop (D.A.S.)

Best option

[Marioec]

Been using K&N for over 35 years no issues here.

[faster42]

Originally Posted by HotRodM4

https://youtu.be/GS69owXpGdY

A comparison with an engine which is not supercharged does not add up

[mike@x-ph.com]

Originally Posted by Marioec

Been using K&N for over 35 years no issues here.

[faster42]

Using a K&N Filter for around 3000 miles

[mike@x-ph.com]

Originally Posted by faster42

Using a K&N Filter for around 3000 miles

I'm confused; what does your picture have to do with the kind of filter you are using?

[tom @ eas]

BMC without a doubt. You'll see the quality in the wicking and filtering media.

We always have BMC in stock.