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carbon filter idea
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01-03-2007, 08:03 AM | #1 |
Client Advisor, BMW West Springfield, MA
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carbon filter idea
Has anyone tried removing the paper filter, and just leaving the carbon filter? Thoughts, suggestions, ideas...
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01-03-2007, 08:37 AM | #2 |
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would that let too many large particles through?
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01-03-2007, 12:12 PM | #6 |
Client Advisor, BMW West Springfield, MA
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What I meant was...on a conventional setup, without a carbon filter... someone that uses a K&N (or similar) vs. a paper filter. The K&N will allow larger particles through, especially if it is not cleaned and greased regularly.
My idea was to drop the paper filter, or K&N altogether, and just run with the carbon filter. I have seen threads that people cut out the carbon filter and run just the paper filter, or K&N setup. My thought is why go through all of the effort, when you can just pop out the regular filter, and run the carbon one. |
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01-03-2007, 01:06 PM | #7 | |
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01-03-2007, 02:01 PM | #8 | |
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01-03-2007, 05:15 PM | #9 |
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if you really want to try it- and risk screwing up your brand new engine.. then go ahead, and tell us what its like.
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01-03-2007, 07:54 PM | #10 | |
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If it's BEFORE the paper filter (I.E. fresh air hits the carbon filter BEFORE it hits the paper filter) then nothing is stopping what txusa is decribing from happening. The carbon filter is ALREADY getting filthy and has no way to be replaced easily. If it's AFTER the paper filter (between the filter and the engine) then yeah, txusa is right, it's a bad idea. |
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01-03-2007, 08:44 PM | #11 | |
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01-04-2007, 07:27 AM | #12 | |
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I guess that is my point with all of this... I've read that people have removed the carbon filter and put in a K&N. What gain are they getting? What we need someone to do is to dyno a car- 1. stock 2. without the paper filter, with carbon 3. with K&N, with carbon (cut out carbon filter here) 4. with just paper filter 5. with just K&N If someone is bored and wants to try it, I can get you cheap time at Bristol Dyno in East Hartford, CT www.bristoldyno.com (I told him not to name it 'Bristol Dyno' because if he ever moves....) |
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01-04-2007, 11:20 AM | #13 |
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now wait a second- charcoal filter removal
I just traded my e60m5 and ordered a 335 manual and one of the mods everyone did on the m5 was remove the charcoal filter. Turns out BMW added the charcoal filter to meet CA emission restrictions for US cars only and if you look at the European or Canadian cars, they didn't have the filters. What would be great is for someone to scan the schematics of the european car airboxes and see if they have two filters. When I pulled the charcoal filter from my m5, it made a noticeable difference in throttle response and the car definitely breathed easier. Since I don't have my 335 yet I can't check but in the m5, the paper filter (orange frame if I remember) was behind the charcoal filter and if the 335 is the same, I will definitely be pulling it. It was a fifteen minute free mod on the m5. Can someone from across the pond pull and scan the schematic of european airbox pretty please? For those of you who have looked at your airbox filter - go see the m5board.com site, search for charcoal filter removal and see if its the same setup.
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