K&N or BMC Drop In?

hl0m4n · 04-08-2009, 02:34 AM

streamline, close thread

airfilters aren't all about performance gains but quality of airflow and streamline is by far the best in this and minimal gains like any other air filter.

carve · 04-08-2009, 11:17 AM

oiled gauze filters tend to have much shallower pleats, and thus less surface area. To offer less resistance to airflow over a smaller surface area, they MUST have bigger pores. This means they don't filter as well. That, combined with the cost, dubious gains, hot air issue make them a bad investment.

Also, I read a test a few years ago that, after several thousand miles when the big pores DO find a big enough piece of dirt to clog them, they actually flow LESS than a paper filter with the same number of miles.

Unless you're heavily modded and the stock filter becomes a choke point, just stay stock.

That said, I'd love to see maybe a dual paper filter intake.

JoeyFiasco · 04-08-2009, 02:59 PM

interesting..

ezatnova · 04-08-2009, 04:02 PM

Quote:

Originally Posted by carve

Unless you're heavily modded and the stock filter becomes a choke point, just stay stock.

Heavily? So, like, map 5 on a JB3 or stage 1 Procede?

04-08-2009, 02:34 AM	#23
hl0m4n Major General 2314 Rep 5,627 Posts Drives: BMW Join Date: Nov 2006 Location: NY iTrader: (58)	streamline, close thread airfilters aren't all about performance gains but quality of airflow and streamline is by far the best in this and minimal gains like any other air filter. __________________ Cars: 07 335i ► 08 328i ► 11 328xi ► 13 M3 ► 17 M4 ► 14 M6
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04-08-2009, 11:17 AM	#24
carve Major 190 Rep 1,105 Posts Drives: 335i Join Date: Feb 2009 Location: usa iTrader: (0)	oiled gauze filters tend to have much shallower pleats, and thus less surface area. To offer less resistance to airflow over a smaller surface area, they MUST have bigger pores. This means they don't filter as well. That, combined with the cost, dubious gains, hot air issue make them a bad investment. Also, I read a test a few years ago that, after several thousand miles when the big pores DO find a big enough piece of dirt to clog them, they actually flow LESS than a paper filter with the same number of miles. Unless you're heavily modded and the stock filter becomes a choke point, just stay stock. That said, I'd love to see maybe a dual paper filter intake.
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04-08-2009, 02:59 PM	#25
JoeyFiasco Major 26 Rep 1,211 Posts Drives: '09 Coupe Join Date: Aug 2008 Location: P'boro, UK iTrader: (0)	interesting..
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