AirRaid vs. K & N air filters - Defender Source
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  #1  
Old December 13th, 2011, 11:34 PM
cdb
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Clark Bowen
1969 Series 2a/OM617 Bugeye 88"
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AirRaid vs. K & N air filters

I've had plenty of experience with K & N filters, but I wonder how Airraid stacks up against them when used offroad or in dusty situations?
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  #2  
Old December 14th, 2011, 07:28 AM
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Phillip
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Junk. Hard to beat the filtration of stock paper filter. I thought beth airarde used a k&n
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Old December 14th, 2011, 07:45 AM
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Tom Rowe
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Stacks up against a K&N? You mean you want something that lets through as much dirt as a K&N?
Not many people know, but K&N clearly states on their web site that using one of their air filters off-road voids the warranty.
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  #4  
Old December 14th, 2011, 11:44 AM
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Clark Bowen
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Who is Beth Ararde?
Yes I know it is an ongoing debate about K & Ns and dirt and I don't use them on my diesel, but I also don't buy the argument that a paper filter is best for a higher performance gas motor in a dusty climate.
What do they run on the Dakar, European rallies, Baja 1000? Paper, foam, oiled cloth? I Googled and couldn't really tell.
I do know that I have been through plenty of "bull dust" in Nevada that is so fine it flows like a liquid 8" deep as you plow through it and never had a problem with K & Ns. Never. Never had the oiled MAF issue either.
So why are AirRaids junk? Specifics.
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  #5  
Old December 14th, 2011, 12:18 PM
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John B.
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Quote:
Originally Posted by cdb View Post
What do they run on the Dakar, European rallies, Baja 1000? Paper, foam, oiled cloth? I Googled and couldn't really tell.
Engine longevity is not exactly a concern for racing. They will rebuild engine regularly regardless.

Filter efficiency tests have been performed and the K&Ns do not fair well. If people want more flow, less restriction fit a larger filter.

------ Follow up post added December 14th, 2011 10:36 AM ------

http://www.aulro.com/afvb/technical-...s-finally.html
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Old December 14th, 2011, 02:30 PM
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The stock air box on a 90 should flow pretty good. I would imagine with a blower lack of fuel not air should be your worry. Are you running an air fuel meter?
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Old December 14th, 2011, 03:59 PM
cdb
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Clark Bowen
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Actually, the motor is in my 1995 RRC.
I wanted to do away with the stock airbox as it seems to restrict airflow at higher load, but I'd lose the protection against water when wading. Exposed paper filters would be vulnerable to wading issues too.
I thought about enlarging the intake and exit holes of the airbox, but I don't trust glued joints to hold up to offroad pounding.
That is why I was looking at K & N and AirRaid filters with a pre-sock.

------ Follow up post added December 14th, 2011 01:01 PM ------

Yes, I have 2 AFR gauges

------ Follow up post added December 14th, 2011 01:08 PM ------

Thanks John.....

That was a very help filter study.
Funny, K & N doesn't have it on their site. They have every other hype.
I think I'll stick with the stock filter and housing for now and sees how it goes when it is on the dyno.
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