air filter

M340i Pride · 01-15-2011, 12:26 AM

k&N washable engine air filter claims (i mean KN, not the filter itself lol) that it can add up to 6 horses just because of better air flow.

what is your opinion on this? they are about 60 bucks, no warranty issues and seems like a easy way to add 'couple' of horses.

think this is a valid claim? i mean, 6 horsepower is pretty decent gain...

Pharaoh2716 · 01-15-2011, 12:30 AM

I have the N55 engine, and I was wondering the same thing. Does the increase in airflow cause any problems for my engine?

M340i Pride · 01-15-2011, 12:33 AM

Quote:

Originally Posted by Pharaoh2716

I have the N55 engine, and I was wondering the same thing. Does the increase in airflow cause any problems for my engine?

i doubt it... i mean they are forced induction engines and better air flow can't be that much of a air like jb1 or vishnu type mods... its just a 'bit' more air than with a regular paper filter...

but that is something to think about.

username604 · 01-15-2011, 12:52 AM

I don't know anything definetly, but i'm pretty sure the turbo's are limited once they spin up on how much air they're pushing in, so easier airflow won't help much, maybe low end torque (before the turbo spools up)?
You probably won't see hp gains since at the top of the rev range where the turbo is limited by the ecu and easier airflow won't matter.
Someone with more knowledge should chip in.

Dr. G · 01-15-2011, 02:57 AM

I would think the filter would help out a bit more with a tune.

ScaredOnce · 01-15-2011, 03:36 AM

Is it true that the K&N really does very little by way of performance gains?

Kolyan2k · 01-15-2011, 08:03 AM

I hate that company. U get no gains from their stupid filters. I heard more MAF sensor problems due to dirt and oil.

01-15-2011, 12:26 AM	#1
M340i Pride Lieutenant Colonel 213 Rep 1,713 Posts Drives: 2020 BMW M340i Join Date: Nov 2010 Location: Los Angeles, CA iTrader: (1)	air filter k&N washable engine air filter claims (i mean KN, not the filter itself lol) that it can add up to 6 horses just because of better air flow. what is your opinion on this? they are about 60 bucks, no warranty issues and seems like a easy way to add 'couple' of horses. think this is a valid claim? i mean, 6 horsepower is pretty decent gain...
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01-15-2011, 12:30 AM	#2
Pharaoh2716 Private First Class 91 Rep 180 Posts Drives: 2015 BMW M4 Join Date: Oct 2010 Location: Bay Area, California iTrader: (0)	I have the N55 engine, and I was wondering the same thing. Does the increase in airflow cause any problems for my engine?
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01-15-2011, 12:52 AM	#4
username604 Colonel 124 Rep 2,554 Posts Drives: bmw Join Date: Sep 2010 Location: repair shop iTrader: (0) Garage List 2008 BMW 335i [10.00]	I don't know anything definetly, but i'm pretty sure the turbo's are limited once they spin up on how much air they're pushing in, so easier airflow won't help much, maybe low end torque (before the turbo spools up)? You probably won't see hp gains since at the top of the rev range where the turbo is limited by the ecu and easier airflow won't matter. Someone with more knowledge should chip in.
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01-15-2011, 02:57 AM	#5
Dr. G Major General 279 Rep 5,063 Posts Drives: Black e92 335i Join Date: Apr 2010 Location: Brampton, Ontario iTrader: (32) Garage List e92 BMW 335i [8.84]	I would think the filter would help out a bit more with a tune. __________________ JB4 / OSS Angel Eyes / Downpipes / F1-Racewerks FMIC / Custom Meth Kit / BMS DCI / ER Chargepipe / HKS BOV / BMS Meth Elbow / BMW Performance Exhaust / Carbon Fiber Inlay Quad Tips / 19" Miro 111 / Front Aero Lip / M3 Sides / VRS CSL Trunk / Mtech Rear / DD CF Quad Finned Diffuser / LCI Tails / BBK / Smoked Reflectors / F1 Euphoria LED Interior / License LED's / GT 5000k Corners / 5000k HID Fogs / Air Scoops / LED Turn Signals / FK Silverline Coilovers / HPA endlinks / Vibrant Resonators / Osram CBI 5000k D1S
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01-15-2011, 03:36 AM	#6
ScaredOnce Very Important 20 Rep 450 Posts Drives: 335xi (e92) Join Date: Sep 2010 Location: PIT iTrader: (0) Garage List 2008 BMW 335xi (e92) [9.00] 2008 Pontiac G8 GT [4.00] 2002 Pontiac Grand ... [0.00] 2001 Cadillac, Eldo ... [0.00]	Is it true that the K&N really does very little by way of performance gains?
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01-15-2011, 08:03 AM	#7
Kolyan2k Major General 930 Rep 5,538 Posts Drives: 2006 S2000 Join Date: Apr 2010 Location: Boston iTrader: (1)	I hate that company. U get no gains from their stupid filters. I heard more MAF sensor problems due to dirt and oil.
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