K&N N55 Drop-in Filter

Harlequin · 09-04-2011, 04:18 AM

http://www.burgertuning.com/N55_BMW_air_filter.html

Are these things US only because of design? or because of regulations?

Is there a drop in option for Aus-spec cars?

JB4-335 · 09-04-2011, 04:22 AM

I don't see why AU spec would use a different filter but im really not all that familiar with N55's. Is it to go with the JB3 Harley? If so than definitely get it.

Harlequin · 09-04-2011, 04:26 AM

Yeah. I've also got a pair of Riss Racing Scoops that I want to get re-finished before I put them in...

CrustyNoodle · 09-04-2011, 04:46 AM

Do it by all means get it but before you do, please do a bit of research to make sure it suits your expectations. Here is a start:

http://www.bobistheoilguy.com/air-filtration-test/

Harlequin · 09-04-2011, 04:53 AM

Thanks. Had a quick scan... Will have a better read later.

My expectations are thus:

I'm not expecting better power or better sound. If I get either of them then WooHoo

I'm looking to do this purely to offset any extra stress placed on the engine by the JB and make sure that it's breathing as best as possible.

That's why I'm not looking at a DCI or CAI... Don't want extra noise (wouldn't object but it's not a must)... want to avoid heat-soak...

recce · 09-04-2011, 05:04 AM

Just be careful with those things as the oil might stuff up the Air Flow sensor.

Harlequin · 09-04-2011, 05:11 AM

I thought they were a dry filter... Did some checking after you're comment:http://www.knfilters.com/search/prod...x?Prod=33-2458

Whadda ya know? Oiled...

Would the AFE Dry Pro Filer be a better bet?
http://www.jlevistreetwerks.com/1-Se...duct_info.html

///M-pressed · 09-04-2011, 05:24 PM

Stick with the stock OEM filter. I'm pretty sure car manufacturers do everything they can to ensure the engine is breathing as best as possible. People usually do the air filters just for the induction sound.

JB4-335 · 09-04-2011, 05:45 PM

Quote:

Originally Posted by Attuale

Stick with the stock OEM filter. I'm pretty sure car manufacturers do everything they can to ensure the engine is breathing as best as possible. People usually do the air filters just for the induction sound.

I gained approximately 7-8rwkw from my BMS DCI. I think that's a substantial gain. If running stock boost I wouldn't bother but if your pushing more boost you'll only benefit.

///M-pressed · 09-04-2011, 08:32 PM

Quote:

Originally Posted by JB4135

I gained approximately 7-8rwkw from my BMS DCI. I think that's a substantial gain. If running stock boost I wouldn't bother but if your pushing more boost you'll only benefit.

Ah sorry I was thinking about an N/A engine. I changed the filter in my M3 countless times and ended up going back to stock. But then again, different car so different results.

Hawkeye 135i · 09-04-2011, 09:33 PM

I used a K&N in my highly modified Jeep. You should have seen the amount of particulate in the cylinders when I had it torn down to put a stroker kit in. Absolutely insane amount of wear in the cylinders too. I'd never recommend a K&N to anyone - no probs when I switched back to the OEM paper filter. Sometimes stock is simply better IMO.

Having said that the Jeep saw heaps of offroad in very hash, dusty conditions which would not be an issue for you so it could be perfectly OK. A few guys also had fouled sensors but I suspected the cause was over-oiling of filter - they swore otherwise though.

09-04-2011, 04:18 AM	#1
Harlequin Brigadier General 331 Rep 4,021 Posts Drives: F32 Coupé Join Date: Mar 2011 Location: Brisbane, Australia BMW Club QLD Member iTrader: (5) Garage List 2015 428i M-Sport [8.40] 2012 1M Coupé [9.25] 2011 135i M-Sport [9.14]	K&N N55 Drop-in Filter http://www.burgertuning.com/N55_BMW_air_filter.html Are these things US only because of design? or because of regulations? Is there a drop in option for Aus-spec cars? __________________
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09-04-2011, 04:22 AM	#2
JB4-335 Brigadier General 168 Rep 3,093 Posts Drives: E92 BSM & E70 AW Join Date: Feb 2011 Location: Australia iTrader: (1)	I don't see why AU spec would use a different filter but im really not all that familiar with N55's. Is it to go with the JB3 Harley? If so than definitely get it.
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09-04-2011, 04:26 AM	#3
Harlequin Brigadier General 331 Rep 4,021 Posts Drives: F32 Coupé Join Date: Mar 2011 Location: Brisbane, Australia BMW Club QLD Member iTrader: (5) Garage List 2015 428i M-Sport [8.40] 2012 1M Coupé [9.25] 2011 135i M-Sport [9.14]	Yeah. I've also got a pair of Riss Racing Scoops that I want to get re-finished before I put them in... __________________
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09-04-2011, 04:46 AM	#4
CrustyNoodle First Lieutenant 12 Rep 317 Posts Drives: 135i DCT Join Date: Jun 2011 Location: Melbourne, Australia iTrader: (0)	Do it by all means get it but before you do, please do a bit of research to make sure it suits your expectations. Here is a start: http://www.bobistheoilguy.com/air-filtration-test/ __________________ BMW - 135i DCT Audi - Q5 3.0TDI
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09-04-2011, 04:53 AM	#5
Harlequin Brigadier General 331 Rep 4,021 Posts Drives: F32 Coupé Join Date: Mar 2011 Location: Brisbane, Australia BMW Club QLD Member iTrader: (5) Garage List 2015 428i M-Sport [8.40] 2012 1M Coupé [9.25] 2011 135i M-Sport [9.14]	Thanks. Had a quick scan... Will have a better read later. My expectations are thus: I'm not expecting better power or better sound. If I get either of them then WooHoo I'm looking to do this purely to offset any extra stress placed on the engine by the JB and make sure that it's breathing as best as possible. That's why I'm not looking at a DCI or CAI... Don't want extra noise (wouldn't object but it's not a must)... want to avoid heat-soak... __________________
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09-04-2011, 05:04 AM	#6
recce Second Lieutenant 23 Rep 224 Posts Drives: 135i & 335i Join Date: Jun 2010 Location: Sydney, Australia iTrader: (0)	Just be careful with those things as the oil might stuff up the Air Flow sensor. __________________ 2009 E90 335i / JB4 G5 ISO / M3 front sway bar / AFE DCI / Air Scoop / BC-BR Coilover /
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09-04-2011, 05:11 AM	#7
Harlequin Brigadier General 331 Rep 4,021 Posts Drives: F32 Coupé Join Date: Mar 2011 Location: Brisbane, Australia BMW Club QLD Member iTrader: (5) Garage List 2015 428i M-Sport [8.40] 2012 1M Coupé [9.25] 2011 135i M-Sport [9.14]	I thought they were a dry filter... Did some checking after you're comment:http://www.knfilters.com/search/prod...x?Prod=33-2458 Whadda ya know? Oiled... Would the AFE Dry Pro Filer be a better bet? http://www.jlevistreetwerks.com/1-Se...duct_info.html __________________
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09-04-2011, 05:24 PM	#8
///M-pressed Lieutenant 276 Rep 417 Posts Drives: E46 M3, F82 M4 Join Date: Jan 2011 Location: Sydney & Melbourne Australia iTrader: (0)	Stick with the stock OEM filter. I'm pretty sure car manufacturers do everything they can to ensure the engine is breathing as best as possible. People usually do the air filters just for the induction sound.
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09-04-2011, 09:33 PM	#11
Hawkeye 135i Private First Class 3 Rep 120 Posts Drives: 135i Join Date: Mar 2010 Location: Gold Coast iTrader: (0)	I used a K&N in my highly modified Jeep. You should have seen the amount of particulate in the cylinders when I had it torn down to put a stroker kit in. Absolutely insane amount of wear in the cylinders too. I'd never recommend a K&N to anyone - no probs when I switched back to the OEM paper filter. Sometimes stock is simply better IMO. Having said that the Jeep saw heaps of offroad in very hash, dusty conditions which would not be an issue for you so it could be perfectly OK. A few guys also had fouled sensors but I suspected the cause was over-oiling of filter - they swore otherwise though.
	Appreciate 0 Quote