charcoal filters - M3 Forum 2010 2009 BMW M3 2008 BMW M3 BMW E90 M3 E92

rick berry · 02-11-2008, 07:35 PM

Does the new M3 have the US only charcoal filters like the M5 and M6? Haven't been able to find a mention of them on the site. Thanks, Rick

malter2.0 · 02-18-2008, 11:34 AM

e9x 3-series have them ... if it helps

!Xoible · 02-18-2008, 12:06 PM

charcoal? you plan on enjoying your M3 the middle eastern way?

cosmos515 · 02-18-2008, 07:54 PM

All the BMW's have them. They are easily, well sort of removable.

rick berry · 02-19-2008, 04:18 PM

On the M5/M6 when you remove the charcoal filter it can result in @ 15 horsepower. The filter is in the air filter box and can be removed. The
charcoal filter is US only and supossedly has to do with emissions when the vehicle is turned off, I believe.

gadget · 03-12-2008, 11:46 AM

Now that US deliveries have taken place, can we please have a volunteer to remove the filter and post thier findings and how-to guide

David1 · 03-13-2008, 01:35 PM

There is no charcoal filter on the 335's.

swamp2 · 03-13-2008, 01:49 PM

This topic has been discussed in depth, even accompanied by dyno reports at m5board.com. There is an "extra" filter the so called charcoal filter in the intake system of the M5/M6 that (I think) is supposed to reduce fuel vapor emmsisions back out of the intake tract. Removing this filter has shown to provide some gains on the dyno.

So the question is. DOES THE M3 HAVE THIS. I'd be willing to bet. I am surprised no current owner can/will verify.

JEllis · 03-18-2008, 11:17 AM

+1 Lets get some feedback

Eclipsis · 03-18-2008, 01:58 PM

I opened the air box up the other day (and proceeded to drop one of the screws into my engine bay

) and the air filter and charcoal filter are one piece. When I removed the filter on the M5, it had two separate filters, one orange and one black (the black being the charcoal filter). No such luck with the M3. If I were to remove the only piece in the air box there would be no filtration device.

Epacy · 03-18-2008, 02:03 PM

That should be good for a +20hp boost!!

T Bone · 03-18-2008, 06:17 PM

Quote:

Originally Posted by Xcellere

I opened the air box up the other day (and proceeded to drop one of the screws into my engine bay

) and the air filter and charcoal filter are one piece. When I removed the filter on the M5, it had two separate filters, one orange and one black (the black being the charcoal filter). No such luck with the M3. If I were to remove the only piece in the air box there would be no filtration device.

Thanks for pointing out my repost......

I would be writing BMC to have them develop a filter for the M3.....it will be good for 10 hp.... And the car will sound better.

Epacy · 03-18-2008, 06:42 PM

Quote:

Originally Posted by T Bone

Thanks for pointing out my repost......

I would be writing BMC to have them develop a filter for the M3.....it will be good for 10 hp.... And the car will sound better.

HP is for the birds...

T Bone · 03-18-2008, 06:59 PM

Quote:

Originally Posted by Epacy

HP is for the birds...

And better fuel "economy"....and sharper throttle response....did I mention better sound?

Don't buy K&N, they are crap.

Hope BMC makes a filter for the S65

Epacy · 03-18-2008, 06:59 PM

Quote:

Originally Posted by T Bone

And better fuel "economy"....and sharper throttle response....did I mention better sound?

Don't buy K&N, they are crap.

Hope BMC makes a filter for the S65

Cars are for the birds...

Factory over-oiled K&N filter blew my MAF on the Max. $400 fix right there...

rvacha · 03-18-2008, 07:42 PM

The big heartburn everyone seems to have with the K&Ns is oil trashing the MAFs (correct me if there is another heartburn I don't know about). Oil would be a non-issue with the M3 since the S65B40 doesn't use MAFs.

Epacy · 03-18-2008, 07:48 PM

Quote:

Originally Posted by rvacha

The big heartburn everyone seems to have with the K&Ns is oil trashing the MAFs (correct me if there is another heartburn I don't know about). Oil would be a non-issue with the M3 since the S65B40 doesn't use MAFs.

That is it. And yes, you are correct, no MAF. Good to see there more than a few that follow little details on here.
Over-oiled filters might still cause a problem with gunking up the air trumpets or the butterfly valves, not to mention the airbox.

T Bone · 03-18-2008, 08:03 PM

Quote:

Originally Posted by rvacha

The big heartburn everyone seems to have with the K&Ns is oil trashing the MAFs (correct me if there is another heartburn I don't know about). Oil would be a non-issue with the M3 since the S65B40 doesn't use MAFs.

With the M5 / M6 filters, poor fitment and also the surface area was really small when compared to the BMCs or stock filters. The M5 / M6 guys who ordered the K&N saw decreased power, higher temps and worse throttle response.

K&N also brought out a Typhoon Cold Air Kit but this threw codes like crazy and some thought it was slower than stock.

See below....which would you rather have??? Some one is going to have to be a test subject....

K&N

Stock (Yellow) and BMC (Red)

Epacy · 03-18-2008, 08:34 PM

Obviously, the K&N doesn't have the same filter surface area.

T Bone · 03-18-2008, 08:46 PM

Quote:

Originally Posted by rvacha

.... but I would say the stock has the most. Unfortunately surface area is not the only factor so its hard to tell which is best by looking at them

I resized so it is easier to look at.... The molding on the BMCs are also alot better. I would start checking the BMC website. They have extensive support for BMWs so it is just a matter of time....

K&N best for the Ford Ranger.

http://www.bmcairfilters.com/

rvacha · 03-18-2008, 09:39 PM

For the record I deleted that post after deciding that "surface area" could be defined more than one way. But the T-Bone is quicker than the eye!

Epacy · 03-18-2008, 09:49 PM

Quote:

Originally Posted by rvacha

For the record I deleted that post after deciding that "surface area" could be defined more than one way. But the T-Bone is quicker than the eye!

I was looking for that post.

02-11-2008, 07:35 PM	#1
rick berry Private First Class Drives: Drives 2008 m3/ 2009 750li Join Date: Jul 2007 Location: marshall texas Posts: 132 iTrader: (0)	charcoal filters Does the new M3 have the US only charcoal filters like the M5 and M6? Haven't been able to find a mention of them on the site. Thanks, Rick

03-18-2008, 11:17 AM	#9
JEllis Brigadier General Drives: E36 M3, 997S Join Date: Oct 2006 Location: San Diego Posts: 3,149 iTrader: (1)	+1 Lets get some feedback __________________

03-18-2008, 02:03 PM	#11
Epacy Reincarnated Drives: 02 Maxima SE Join Date: Mar 2007 Location: IL Posts: 4,217 iTrader: (0) View Epacy's Garage	That should be good for a +20hp boost!! __________________ Pearl Bliss

03-18-2008, 07:42 PM	#16
rvacha Captain Drives: '08 E92 M3 Join Date: Mar 2007 Location: Cleveland, OH Posts: 745 iTrader: (0) View rvacha's Garage	The big heartburn everyone seems to have with the K&Ns is oil trashing the MAFs (correct me if there is another heartburn I don't know about). Oil would be a non-issue with the M3 since the S65B40 doesn't use MAFs. __________________ '03 X5 4.4i Blue/Tan '06 E90 330Xi 6MT Sparkling Graphite/Terra '08 E92 M3 6MT Jerez/Speed Cloth <-- Evil Twin

03-18-2008, 08:34 PM	#19
Epacy Reincarnated Drives: 02 Maxima SE Join Date: Mar 2007 Location: IL Posts: 4,217 iTrader: (0) View Epacy's Garage	Obviously, the K&N doesn't have the same filter surface area. __________________ Pearl Bliss

02-18-2008, 11:34 AM	#2
malter2.0 BMW Aficionado Drives: '01 E46 M3 Join Date: Jun 2006 Location: Boston, MA Posts: 357 iTrader: (0)	e9x 3-series have them ... if it helps

02-18-2008, 12:06 PM	#3
!Xoible Banned Drives: .... Join Date: Nov 2006 Location: . Posts: 1,669 iTrader: (4) View !Xoible's Garage	charcoal? you plan on enjoying your M3 the middle eastern way?

02-18-2008, 07:54 PM	#4
cosmos515 Second Lieutenant Drives: I find what I keeps Join Date: Feb 2008 Location: So Cal Posts: 207 iTrader: (0)	All the BMW's have them. They are easily, well sort of removable.

02-19-2008, 04:18 PM	#5
rick berry Private First Class Drives: Drives 2008 m3/ 2009 750li Join Date: Jul 2007 Location: marshall texas Posts: 132 iTrader: (0)	On the M5/M6 when you remove the charcoal filter it can result in @ 15 horsepower. The filter is in the air filter box and can be removed. The charcoal filter is US only and supossedly has to do with emissions when the vehicle is turned off, I believe.

03-12-2008, 11:46 AM	#6
gadget Major Drives: 09 e92///M SSII DCT Join Date: Nov 2007 Location: US Posts: 1,182 iTrader: (0)	Now that US deliveries have taken place, can we please have a volunteer to remove the filter and post thier findings and how-to guide

03-13-2008, 01:35 PM	#7
David1 Captain Drives: 09 E92 09 X5 Join Date: Mar 2007 Location: City With No Room For Ludicris Speed! Posts: 883 iTrader: (0)	There is no charcoal filter on the 335's.

03-13-2008, 01:49 PM	#8
swamp2 Major General Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA Posts: 6,525 iTrader: (1)	This topic has been discussed in depth, even accompanied by dyno reports at m5board.com. There is an "extra" filter the so called charcoal filter in the intake system of the M5/M6 that (I think) is supposed to reduce fuel vapor emmsisions back out of the intake tract. Removing this filter has shown to provide some gains on the dyno. So the question is. DOES THE M3 HAVE THIS. I'd be willing to bet. I am surprised no current owner can/will verify.

03-18-2008, 01:58 PM	#10
Eclipsis Colonel Drives: 2008 M5, 2008 E92 M3 Join Date: Oct 2007 Location: Beverly Hills, CA Posts: 2,003 iTrader: (6)	I opened the air box up the other day (and proceeded to drop one of the screws into my engine bay ) and the air filter and charcoal filter are one piece. When I removed the filter on the M5, it had two separate filters, one orange and one black (the black being the charcoal filter). No such luck with the M3. If I were to remove the only piece in the air box there would be no filtration device.

03-18-2008, 09:39 PM	#21
rvacha Captain Drives: '08 E92 M3 Join Date: Mar 2007 Location: Cleveland, OH Posts: 745 iTrader: (0) View rvacha's Garage	For the record I deleted that post after deciding that "surface area" could be defined more than one way. But the T-Bone is quicker than the eye! __________________ '03 X5 4.4i Blue/Tan '06 E90 330Xi 6MT Sparkling Graphite/Terra '08 E92 M3 6MT Jerez/Speed Cloth <-- Evil Twin