BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Strasse Wheels
Post Reply
 
Thread Tools Search this Thread
      11-26-2011, 07:00 PM   #1
scottalin
Registered
 
Drives: E90 BMW M3 Sedan, black
Join Date: Nov 2011
Location: Chicago

Posts: 2
iTrader: (0)

Best E90 intake upgrade

Hi,

I'm looking to get a little more horsepower and improve the sound of my E90 M3 without spending a lot. I've heard that OEM intake unit is optimal compared to aftermarket units and the best upgrade you can make is changing the filter. Is this true? I just bought mine yesterday and I'd appreciate any help. Thanks!

Scott
scottalin is offline  
0
Reply With Quote
      11-26-2011, 07:11 PM   #2
spdy330
Major General
 
spdy330's Avatar
 
Drives: 05 Tundra, 11 M3, 08 Odyssey
Join Date: Dec 2009
Location: Chino, CA

Posts: 6,004
iTrader: (159)

Garage List
Send a message via AIM to spdy330 Send a message via Yahoo to spdy330
Don't waste your money, OEM is fine. Congrats on your purchase!
__________________
If any of you are purchasing ANY AT&T services could you mention that you were referred by me? My referral ID is eo4489. This would be a great help, thank you!
spdy330 is online now   United_States
0
Reply With Quote
      11-26-2011, 07:52 PM   #3
1sikbmr
Brigadier General
 
1sikbmr's Avatar
 
Drives: E90 M3 6MT
Join Date: Mar 2010
Location: New York

Posts: 3,277
iTrader: (14)

Dont bother changing the full intake you might end up losing power. Go for a drop in filter from a reputable company. I have the active autowerke filter and love it but there are a lot of others to choose from. Search and choose the one you like the best
__________________

E90 ///M3 6MT Atlantis Blue - Fox red
ESS VT1-550|Gloss black grilles/Gold gills|V1 hardwire|Filled reflectors|ZHP lighted shift knob|Volk TE37 Gloss Black|Mode Carbon GT4 Lip|Umnitza V4 full blackout kit|Agency Power exhaust|Sosi x-pipe|BMW Performance Steering Wheel V1|
1sikbmr is offline  
0
Reply With Quote
      11-26-2011, 08:16 PM   #4
M3SQRD
Colonel
 
M3SQRD's Avatar
 
Drives: E92 M3s, R56 Cooper S
Join Date: Jun 2009
Location: EC

Posts: 2,476
iTrader: (2)

Quote:
Originally Posted by 1sikbmr View Post
Dont bother changing the full intake you might end up losing power. Go for a drop in filter from a reputable company. I have the active autowerke filter and love it but there are a lot of others to choose from. Search and choose the one you like the best
+1

Don't waste money on an intake. Drop-in filter is the way to go!
M3SQRD is offline   United_States
0
Reply With Quote
      11-26-2011, 09:16 PM   #5
disapr
drop a gear and...
 
Drives: 2010 M3
Join Date: Mar 2011
Location: Houston, TX

Posts: 961
iTrader: (4)

Garage List
2004 BMW M3  [0.00]
The best intake upgrade is one with a compressor attached. Otherwise look into the macht schnell intake system for better sound.
__________________
disapr is offline   United_States
0
Reply With Quote
      11-26-2011, 09:41 PM   #6
Ateam
Banned
 
Drives: M3
Join Date: Sep 2011
Location: USA

Posts: 1,109
iTrader: (0)

I have posted about this recently. A filter (I got BMS but MS or any other high flow oiled filter will do) will give you a nice increase in intake roar over stock.

However the OEM filter size is so monstrous and big, and the intake box sucks in so much air, and there is an opening in the hood directly from the intake, that you get as much intake sound as you are going to get.

For an experiment I took the top off my intake box and left it as a "open" intake setup to see if it was signifigantly louder and even with the top of the airbox off (just filter on) it was no different than the stock setup with the lid on like normal. I think the intake path out the hood allows for all the sound to be heard as that is a direct path to the filter. The other intake kits are not worth it and IMO likely lose some performance.

The "elbow" in the aftermarket parts is generally larger than OEM and the larger the diameter, the slower velocity of air flow. Bmw designed their elbow the size they did for a reason IMO and I believe the OEM setup is better than anything out there. Filter is a good upgrade though-sounds great!
Ateam is offline  
0
Reply With Quote
      11-26-2011, 10:22 PM   #7
Mahzari
Captain
 
Drives: poorly
Join Date: May 2010
Location: California

Posts: 671
iTrader: (0)

To add to what Ateam said, the stock filter has a charcoal filter built in and the aftermarket filters do not, which is why they are a bit louder and add some horsepower.

Currently my car is stock, but I will be buying a BMC filter soon
__________________
2012 328i Sport Line: H/K + SA
Mahzari is offline   Iran
0
Reply With Quote
      11-26-2011, 10:45 PM   #8
Ateam
Banned
 
Drives: M3
Join Date: Sep 2011
Location: USA

Posts: 1,109
iTrader: (0)

Actually after 2010 they no longer have charcoal built in and they are changed to the euro filter setup. So if you have a pre-2010 you even get more difference with aftermarket filter.
Ateam is offline  
0
Reply With Quote
      11-27-2011, 01:57 AM   #9
Mahzari
Captain
 
Drives: poorly
Join Date: May 2010
Location: California

Posts: 671
iTrader: (0)

Quote:
Originally Posted by Ateam View Post
Actually after 2010 they no longer have charcoal built in and they are changed to the euro filter setup. So if you have a pre-2010 you even get more difference with aftermarket filter.
That's good to know, it disproves any rumors that the removing the charcoal filter will harm the car in any way. Thanks
__________________
2012 328i Sport Line: H/K + SA
Mahzari is offline   Iran
0
Reply With Quote
      11-27-2011, 03:11 PM   #10
scottalin
Registered
 
Drives: E90 BMW M3 Sedan, black
Join Date: Nov 2011
Location: Chicago

Posts: 2
iTrader: (0)

Thanks for everyone's input. I really appreciate it.
scottalin is offline  
0
Reply With Quote
      11-29-2011, 04:38 PM   #11
SV Concepts II
 
SV Concepts II's Avatar
 
Drives: E90 M3
Join Date: Dec 2008
Location: 1460 White Oaks Rd. Suite F Campbell, CA 95008

Posts: 6,095
iTrader: (7)

Yeah I have heard a lot of customers are happy with the drop in filters. Active Autowerke or aFe make some great filters.
SV Concepts II is offline   United_States
0
Reply With Quote
      12-01-2011, 12:47 PM   #12
BMWNTHZST
Enthusiast
 
BMWNTHZST's Avatar
 
Drives: 2011 E92 M3
Join Date: Jan 2009
Location: Toronto

Posts: 1,001
iTrader: (25)

Garage List
2011 BMW X5 M  [0.00]
1997 BMW 840CI  [5.00]
2011 BMW M3  [3.50]
2008 BMW 335i Conve ...  [4.20]
2004 BMW M3  [4.50]
Quote:
Originally Posted by Bryan@Jlevi SW View Post
Yeah I have heard a lot of customers are happy with the drop in filters. Active Autowerke or aFe make some great filters.
What's better the pre oiled or dry AFE filter?

I'm going to do this mod however I want to make the right choice.
__________________
2011 E70 X5 ///M Black Sapphire Metallic / Black
2008 E93 335i Black Sapphire Metallic / Saddle Brown
1997 840Ci Jet Black / Black
2004 E46 ///M3 Laguna Seca Blue / Black
2011 E92 ///M3 Alpine White / Black (gone but not forgotten )
BMWNTHZST is offline   Canada
0
Reply With Quote
      12-01-2011, 01:02 PM   #13
ModBargains III
Lieutenant
 
Drives: E92 335i, 135i, E46 M3, 540i
Join Date: Sep 2011
Location: 1721 E. Lambert Rd. Unit C, 90631 La Habra, CA

Posts: 423
iTrader: (0)

Quote:
Originally Posted by BMWNTHZST View Post
What's better the pre oiled or dry AFE filter?

I'm going to do this mod however I want to make the right choice.
Oiled has better performance, but the dry filter has better filtration capability. Personally I go with oiled just to get that extra performance, but either one you go with, I'm sure you'll be happy.
__________________
ModBargains III is offline   United_States
0
Reply With Quote
      12-01-2011, 01:24 PM   #14
SV Concepts II
 
SV Concepts II's Avatar
 
Drives: E90 M3
Join Date: Dec 2008
Location: 1460 White Oaks Rd. Suite F Campbell, CA 95008

Posts: 6,095
iTrader: (7)

Quote:
Originally Posted by BMWNTHZST View Post
What's better the pre oiled or dry AFE filter?

I'm going to do this mod however I want to make the right choice.
The oiled filter has 75% better air flow over stock and the dry filter has 50% better air flow over stock. Personally, I wouldn't want to deal with re-oiling the filter after cleaning it so I would go with a dry filter. I highly doubt I would notice a 25% difference in air flow, but who knows It all comes down to personal preference. Can't go wrong with either choice though.
SV Concepts II is offline   United_States
0
Reply With Quote
      12-01-2011, 11:37 PM   #15
Singletrack
4th down; 4th quarter? Renegade.
 
Singletrack's Avatar
 
Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

Posts: 3,812
iTrader: (3)

Quote:
Originally Posted by Ateam View Post
The "elbow" in the aftermarket parts is generally larger than OEM and the larger the diameter, the slower velocity of air flow. Bmw designed their elbow the size they did for a reason IMO and I believe the OEM setup is better than anything out there.
LOL - you just made that up.

The key factor on the intake side is pressure drop, not "air velocity".
Singletrack is offline   United_States
0
Reply With Quote
      12-02-2011, 12:43 AM   #16
Ateam
Banned
 
Drives: M3
Join Date: Sep 2011
Location: USA

Posts: 1,109
iTrader: (0)

Quote:
Originally Posted by Singletrack View Post
LOL - you just made that up.

The key factor on the intake side is pressure drop, not "air velocity".
huh? Velocity of both intake air as well as exhaust gases is what effects the pulses in a NA engine that is actually pretty important. Smaller diameter tubing in intake or exhaust causes the the velocity of the gas to move faster. That is why some exhausts on many other cars that would put whopping large piping on would lose horsepower due to loss of velocity and scavening.

While pressure changes is related to velocity due to burnoille's principe it is definetly a factor. Some of the RPI exhaust designs are kind of cool that they progressively get smaller toward the end of the exhaust to keep the gases flowing more quickly. Not on the m3 obviously.
Ateam is offline  
0
Reply With Quote
      12-03-2011, 01:00 AM   #17
Singletrack
4th down; 4th quarter? Renegade.
 
Singletrack's Avatar
 
Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

Posts: 3,812
iTrader: (3)

Quote:
Originally Posted by Ateam View Post
huh? Velocity of both intake air as well as exhaust gases is what effects the pulses in a NA engine that is actually pretty important. Smaller diameter tubing in intake or exhaust causes the the velocity of the gas to move faster. That is why some exhausts on many other cars that would put whopping large piping on would lose horsepower due to loss of velocity and scavening.

While pressure changes is related to velocity due to burnoille's principe it is definetly a factor. Some of the RPI exhaust designs are kind of cool that they progressively get smaller toward the end of the exhaust to keep the gases flowing more quickly. Not on the m3 obviously.
The only issue with your application of theory is that all the actual data is contrary to it on this engine. If the intake elbow change were so detrimental, then it would be represented on the various dyno plots that have been posted. They would show a loss in power. People can argue about the gains, or whatever, but they always show gains, or similar power. I've yet to see a Dinan or MS intake lose power on the dyno.

We won't know exactly what is optimal until someone like Evolve does a thorough analysis, like they did recently on the exhaust. Making gross generalizations without any data to back them up doesn't help anyone.
Singletrack is offline   United_States
0
Reply With Quote
      12-03-2011, 01:44 AM   #18
Zzhou
Lieutenant
 
Zzhou's Avatar
 
Drives: 2012 E92 SSII ZCP DCT
Join Date: Aug 2011
Location: West Lafayette,IN/Shanghai,China

Posts: 525
iTrader: (0)

I just Drop in a K&N filter, and I'm happy lol...
Zzhou is offline  
0
Reply With Quote
      03-11-2013, 03:00 PM   #19
MTrezzz
Captain
 
Drives: Lime Rock Edition
Join Date: Jan 2013
Location: Long Island

Posts: 680
iTrader: (0)

Quote:
Originally Posted by Ateam View Post
Actually after 2010 they no longer have charcoal built in and they are changed to the euro filter setup. So if you have a pre-2010 you even get more difference with aftermarket filter.
So what does that mean? Aftermarket intakes have a different performance spec on the 2010-2013????
I was wondering too, does an Intake do much as in sound and performance of the car???
MTrezzz is online now   United_States
0
Reply With Quote
      03-11-2013, 11:19 PM   #20
Chris250
New Member
 
Drives: Lexus is250
Join Date: Jan 2013
Location: Baltimore

Posts: 21
iTrader: (0)

very useful info in this thread!
Chris250 is offline  
0
Reply With Quote
      03-12-2013, 06:50 AM   #21
BMRLVR
Grease Monkey
 
BMRLVR's Avatar
 
Drives: 2011 E90 M3,1994 Euro E36 M3/4
Join Date: Apr 2006
Location: Fort McMurray, Alberta, Canada

Posts: 2,329
iTrader: (3)

Quote:
Originally Posted by SV Concepts II
Quote:
Originally Posted by BMWNTHZST View Post
What's better the pre oiled or dry AFE filter?

I'm going to do this mod however I want to make the right choice.
The oiled filter has 75% better air flow over stock and the dry filter has 50% better air flow over stock. Personally, I wouldn't want to deal with re-oiling the filter after cleaning it so I would go with a dry filter. I highly doubt I would notice a 25% difference in air flow, but who knows It all comes down to personal preference. Can't go wrong with either choice though.
If these filters flow that much more air compared to stock with similar filter area they must be letting in a shit pile of dirt.

An air filter can't let in more air without letting in more dirt when unless the filter media area is larger!
__________________
2011 E90 M3 ZCP - Individual Moonstone/Individual Amarone Extended/Individual Piano Black With Inlay:LINK!!!
1994 Euro E36 M3 Sedan - Daytona Violet/Mulberry:LINK!!!
BMRLVR is offline   Canada
0
Reply With Quote
      03-12-2013, 03:29 PM   #22
M3takesNYC
Banned
 
Drives: m3
Join Date: Feb 2013
Location: NYC

Posts: 426
iTrader: (0)

Well you are disregarding the entire concept of an oil filter. The whole point is that it can have bigger "holes" in the filter but the oil itself acts as a filter to "stick" to particals. So instead of a mechanical filter if you will, its a oil film filter that lets air through but sticks the dirt and particals.

So yes you can have bigger flow with not much more dirt go through due to the oil. That is why putting an oiled filter back in under oiled is devestating

I have 5 new BMC fitlers i replace every 10k miles as I don't like to clean and reoil mine.

The non-oiled filters obviously flow less as stated
M3takesNYC is offline  
0
Reply With Quote
Post Reply

Bookmarks

Tags
intake, upgrade

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 09:15 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST