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Old 02-27-2011, 11:12 PM   #1
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Default What air filter are you using and why?

I have a cheap one that came from only god knows where and am thinking of going for something a little less knockoff/ebay. Mnetters seem to love k&N filters, evo guys like Perrin foam filters and Amsoil's, and honda guys like to run with chicken wire on their tb's.

So mine is an ebay special (I think) and I am using it because it was convenient. It keeps filth, bugs, and sand out but I don't think the flow is very good.
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Old 02-27-2011, 11:15 PM   #2
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K&N from eBay. Because it was cheap.

Filters are a compromise - the better flowing it is, the more **** it lets through. But honestly, it really makes no significant difference.
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Old 02-27-2011, 11:23 PM   #3
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Quote:
Originally Posted by rider384 View Post
K&N from eBay. Because it was cheap.

Filters are a compromise - the better flowing it is, the more **** it lets through. But honestly, it really makes no significant difference.
http://forums.evolutionm.net/evo-eng...t-results.html

I'm running a K&N right now just because that's all they had around the shop at the time, however, I am going to to switch in the near future.
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Old 02-27-2011, 11:33 PM   #4
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Quote:
Originally Posted by jtothawhat View Post
http://forums.evolutionm.net/evo-eng...t-results.html

I'm running a K&N right now just because that's all they had around the shop at the time, however, I am going to to switch in the near future.
I would argue that the test is flawed for 2 reasons:
1. No two dyno results are the same. Two of the filters got better numbers than running no filter. If someone could explain a reason other than differing tests I would be interested.
2. It's irrelevant to most Miata owners because that car makes 400hp.

Interesting test, though. I suppose it has some use on filters that are significantly off of the "no filter" run, but anything close to it I would say is just down to the run.

EDIT: Actually, I find it rather interesting how all the torque ratings are skewed much more than the HP ratings.
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Old 02-27-2011, 11:54 PM   #5
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K&N because it came with the BEGi kit. Amsoil filters are paper, and awesome for filtration, but I think K&N is good enough.
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Old 02-27-2011, 11:59 PM   #6
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Same as hustler, the K&N that came from BEGI.
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Old 02-28-2011, 12:05 AM   #7
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aem dryflow. they are washable and dont get oily dirt slime like the k&n.

it was readily available in a 4" inlet.



I'm about ready to wash it though.
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Old 02-28-2011, 12:17 AM   #8
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Pep Boyz special.

Cause its mad JDM tYte y0 and was available in a 4" inlet.
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Old 02-28-2011, 12:50 AM   #9
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I use a mad tyte Specktre washable filer.... cause its what I have.
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Old 02-28-2011, 12:59 AM   #10
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Its not about the length. Its ALL bout the girth
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Old 02-28-2011, 01:01 AM   #11
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I have a k&n now because I have a 20% discount at work. And the ghetto filter that I made last year was too JDM.
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Old 02-28-2011, 01:01 AM   #12
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An older pre-dryflow AEM filter. It has a little velocity stack molded into the base. Nice touch.
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Old 02-28-2011, 04:44 AM   #13
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I worm geared a sock onto my compressor inlet. I have big feet
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Old 02-28-2011, 07:29 AM   #14
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While searching eBay I found the 3A Racing filter which had an interesting link from Auto Salon Magazine, Issue 51, January 2007 that compared many of the leading air filters, including the 3A Racing air filter, K&N filter and AEM filter. See
http://www.australianauto.com.au/HTM...hoot%20Out.pdf

It was surprising to see how badly my AEM filter rated with regard to air flow against the other filters. The 3A Racing filter was ranked 2nd in filtration and 1st in air flow so I figured that had to be worth a few extra "killer-wasps" AND it only cost A$40 DELIVERED from eBay so why not?

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Old 02-28-2011, 11:05 AM   #15
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apparently Amsoil and Injen are now buddybuddy and sell together the amsoil blue filters.

for which you can get water and big particle-repellent prefilter socks!

Last edited by y8s; 02-28-2011 at 11:05 AM. Reason: -for
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Old 02-28-2011, 11:20 AM   #16
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K&n ru-5111
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Old 02-28-2011, 11:34 AM   #17
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Same as above, I use the K&N that came with my kit.



Quote:
Originally Posted by Lokiel View Post
Great link and strong first post!
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Old 02-28-2011, 11:35 AM   #18
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K&N from amazon. Best prices I could find for them. Even better than eBay.
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Old 02-28-2011, 12:47 PM   #19
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Quote:
Originally Posted by 18psi View Post
Pep Boyz special.

Cause its mad JDM tYte y0 and was available in a 4" inlet.
Quote:
Originally Posted by Pen2_the_penguin View Post
I use a mad tyte Specktre washable filer.... cause its what I have.
Quote:
Originally Posted by 18psi View Post
Its not about the length. Its ALL bout the girth
This, chodes unite!
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Old 02-28-2011, 01:03 PM   #20
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Quote:
Originally Posted by Faeflora View Post
I worm geared a sock onto my compressor inlet. I have big feet
Turbo not hit sock?
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