K&N Filter tests
01-12-2009, 09:58 AM
#41
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silvershadow Posted on Jan 12 2009, 02:48 PM
UOA's usually show elements at those levels.
The fact it (Si) shows up in UOA's and VOA's is IMO the proof.
If you're sure the Si found IS an oil additve.
If it is Si that entered the crankcase and was grounded down over time it would have caused wear.
In that case one would see higher levels of Fe, Cu, Al and maybe others too.
silvershadow Posted on Jan 12 2009, 02:48 PM
Did this test include the K&N?
K&N = multiple layers of oiled cotton.
They - K&N - claim that the trapped dirt at the outer part of the filter actually helps filtering, would you consider that to be
?
My street only DD S2k with K&N drop-in filter only shows a little dirt on the outside of the filter, more like a shade of dirt.
I don't see this plugging the filter but a flow test might...
Now as far as silicon in oil - it is true that silicon is used in oil as an anti-foaming agent.
However that silicon is typically tied to some organic molecule, and would be at the atomic level,
However that silicon is typically tied to some organic molecule, and would be at the atomic level,
Wear of metallic parts, for example, produces a lot of minute particles, which are carried by the lubricant. These small metal particles can give information about the machine elements that are wearing, and can be detected by various methods, for example, Atomic Emission Spectrometry.
therefore not an engine wear factor.
If it is Si that entered the crankcase and was grounded down over time it would have caused wear.
In that case one would see higher levels of Fe, Cu, Al and maybe others too.
silvershadow Posted on Jan 12 2009, 02:48 PM
and found that most of them flowed more air - for a few minutes in our test, and then plugged to the point where they were actually flowed less air than the OEM filter. The oiled foam filter were the worst.
K&N = multiple layers of oiled cotton.
They - K&N - claim that the trapped dirt at the outer part of the filter actually helps filtering, would you consider that to be
?My street only DD S2k with K&N drop-in filter only shows a little dirt on the outside of the filter, more like a shade of dirt.
I don't see this plugging the filter but a flow test might...
05-11-2009, 08:24 AM
#43
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THis is a fairly general statement but I work for a filter company so I know it to be true:
Air filters as a whole generally pass more particles when they are clean then when they are dirty. <--- this is only true in Air filtration, not in liquid.
Therefore I believe K&Ns statement to be true.
Air filters as a whole generally pass more particles when they are clean then when they are dirty. <--- this is only true in Air filtration, not in liquid.
Therefore I believe K&Ns statement to be true.
05-12-2009, 01:16 PM
#44
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I've read a couple threads in the past about K&N filtration effectiveness and as a result I'm a little nervous about the FIPK I had been planning to buy.
I was wondering about using the Honda OEM filter on the K&N intake as a compromise between the two. I would get the "cold air" and the straighter/smoother intake pipe with the benefit of the highly effective OEM filter.
Anyone tried this or know if it's remotely feasible?
I was wondering about using the Honda OEM filter on the K&N intake as a compromise between the two. I would get the "cold air" and the straighter/smoother intake pipe with the benefit of the highly effective OEM filter.
Anyone tried this or know if it's remotely feasible?
05-12-2009, 03:11 PM
#45
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I have used the K&N air filter (drop in) for 42K of the 46K on my S2000. I have a couple of UOA's that show silicon levels to be normal for 5K OCI's (10-12PPM). I switched back to an OEM PCX-003 filter and didn't notice any drop in performance. I have two concerns though:
1. the filter doesn't fit in the airbox as well as the K&N did. It seems like a pretty good seal though.
2. I hope the OEM handles heat soak as well as the K&N in this Texas heat. It's not usually a problem, unless I get stuck in traffic or at a red light for awhile.
1. the filter doesn't fit in the airbox as well as the K&N did. It seems like a pretty good seal though.
2. I hope the OEM handles heat soak as well as the K&N in this Texas heat. It's not usually a problem, unless I get stuck in traffic or at a red light for awhile.
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