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Old 09-02-2013, 06:11 PM   #1
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K&N VS. Stock

I have a stock Rancor ECO 1148800003 air intake filter, does anyone have a comparison to a K&N regarding minimum micron size and surface sq. inches?

Remember, filters become more efficient as they get dirty.

Thanks

John
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Old 09-02-2013, 06:18 PM   #2
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I'm sure K&N flows lots of air. That's not a good thing.
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Old 09-02-2013, 06:23 PM   #3
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They flow more air because they let more dust through!

I used them on my racing motorcycles, but I rebuilt them every season. I don't want to have to do that with a diesel engine!

Never heard of a "Rancor ECO" filter. A search on Google doesn't show anything for it either.
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Old 09-02-2013, 06:27 PM   #4
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I would not use a K & N if my life depended on it. Too much air and dirt.
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Old 09-02-2013, 06:29 PM   #5
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Now that does not answer the question...
I was looking for a comparison to a K&N regarding minimum micron size and surface sq. inches?

Tks

John
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Old 09-02-2013, 06:30 PM   #6
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Quote:
Originally Posted by Ranger Smith View Post
I would not use a K & N if my life depended on it. Too much air and dirt.
Air = GOOD
Dirt = BAD, BAD, BAD!!
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Old 09-02-2013, 06:30 PM   #7
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Leave the K&N where it belongs, at the store!
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Old 09-02-2013, 06:32 PM   #8
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Quote:
Originally Posted by John Pacello View Post
I have a stock Rancor ECO 1148800003 air intake filter, does anyone have a comparison to a K&N regarding minimum micron size and surface sq. inches?

Remember, filters become more efficient as they get dirty.

Thanks

John
A good internet search will reveal a few independent studies. I'll express my opinion based on my experience. K&N filters, and other oiled cotton filters let in more dirt. I wipe my intake pipeing with a white lint free cloth at each filter service. I can see the dirt on the rag when I use this type of filter. I don't care if they filter more when dirty, I need it to filter good all the time. A good quality, properly sealing paper one will work better at filtering, but may flow slightly less.

With all that said the great majority of vehicles are retired to be recycled with good engines. The difference in filtering will not matter to most. Everyone and their brother has an opinion on this, and I'm sure I won't be the last here to express one. However, I'll say it now, this is the last thing I have to say about the great K&N debate. I hope my opinion is considered constructive.
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Old 09-02-2013, 06:35 PM   #9
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I bought my '02 F350 in 2004, and the previous owner had installed a K&N filter on it. I just cleaned and oiled it today, interestingly. I found NO dusting inside the intake tube, and I operate it in a really dusty farm environment all the time.

I wouldn't buy one for any other vehicles I own just because I don't think the cost/benefit is there. But I don't have any problems with the vehicle I do have one on, and no indication of dust infiltration. I wouldn't advise against it for anyone, but I just don't believe it adds anything but a maintenance chore.
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Old 09-02-2013, 06:35 PM   #10
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Quote:
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I would not use a K & N if my life depended on it. Too much air and dirt.
Why do you say too much air is a bad thing? Also wondering why you would think a K & N lets more dirt through? I ran K & N filters on my Suzuki Quads out in the sand dunes for many years and that was the only way to keep sand and dirt out of the carburetors. Just wondering where you got your information or why you think K & N filters are bad.

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Old 09-02-2013, 06:52 PM   #11
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Just wondering where you got your information or why you think K & N filters are bad.

Sammie
Possibly because testing shows that K&N's let more dirt through?
Using a K&N on a Cummins will leave you with no warranty
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Old 09-02-2013, 07:45 PM   #12
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Conventional wisdom/common sense says more air flow = more dirt infiltration. If you have a filter that flows more air, it must have larger openings, and those larger openings must let larger dust particles through.

I'd switch my K&N equipped 7.3 diesel back to stock if I had the parts that were removed, and I may still if I come across the parts in the junkyard. But I'm not panicing about it because I have not seen any dust infiltration nor wear on the turbo fins. I'd just switch it back because the regular cleaning and oiling is a pain in the caboose and costs more than a paper filter would.
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Old 09-02-2013, 08:13 PM   #13
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Conventional wisdom/common sense says more air flow = more dirt infiltration. If you have a filter that flows more air, it must have larger openings, and those larger openings must let larger dust particles through.

I'd switch my K&N equipped 7.3 diesel back to stock if I had the parts that were removed, and I may still if I come across the parts in the junkyard. But I'm not panicing about it because I have not seen any dust infiltration nor wear on the turbo fins. I'd just switch it back because the regular cleaning and oiling is a pain in the caboose and costs more than a paper filter would.
You could put on a Napa 6637 or equivalent filter.
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Old 09-02-2013, 08:27 PM   #14
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You could put on a Napa 6637 or equivalent filter.

Thanks, looks like it'll slip right on.
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