Interesting read on air filters
11-09-2007, 10:05 AM
#31
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Originally Posted by iam7head,Nov 8 2007, 03:34 AM
there's no free lunch, air flow up =less restriction= less filtering
11-10-2007, 04:10 AM
#32
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txst Posted on Nov 9 2007, 09:05 PM
That is what K&N claim too.
Larger dirt paricles caught on the outside of the filter help filtering.
I'm listening to my UOA.
If the silicon (Si) levels stay low, the K&N stay's too.
And what if silicon parts make it into the combustion chamber, and fly out the exhaust, who cares?
No harm done
P.S. the OEM crankcase ventilation design allows for a lot of (filtered) air to flow through the crankcase.
If silicon parts make it through the filter they will surely be caught by the oil mist.
One more
for KrankVents.
Or any other way to stop air flow through the crankcase.
(allowing blow-by to leave without restriction, that is)
Another interesting thing is that the filtering effectiveness actually increases as the filter loads up with dirt.
Larger dirt paricles caught on the outside of the filter help filtering.
I'm listening to my UOA.
If the silicon (Si) levels stay low, the K&N stay's too.
And what if silicon parts make it into the combustion chamber, and fly out the exhaust, who cares?
No harm done
P.S. the OEM crankcase ventilation design allows for a lot of (filtered) air to flow through the crankcase.
If silicon parts make it through the filter they will surely be caught by the oil mist.
One more
for KrankVents.Or any other way to stop air flow through the crankcase.
(allowing blow-by to leave without restriction, that is)
11-10-2007, 04:38 AM
#33
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Originally Posted by jyeung528,Nov 6 2007, 02:15 PM
if i use the stock paper filter with the k&n pipe...will that still be better than the stock airbox?
It looks like a lot of R&D went in to the design of the stock airbox and capitalizes on the intake pulses to help out. If you look closely at the intake tube of the stock set-up you'll quickly notice that it is very short for one and it decreases in diameter as it gets closer to the throttle body.
If someone wants to post the chart for me, I'll email to you. (I don't know how to post up pics on here and don't have a photobucket account).
11-11-2007, 07:42 AM
#36
Originally Posted by chetly,Nov 11 2007, 10:54 AM
Has anyone seen an engine failure BECAUSE of a K&N filter, I dont think so.
11-11-2007, 10:06 AM
#37
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Originally Posted by slalom44,Nov 11 2007, 08:42 AM
There have been numerous UOAs posted on BITOG showing high wear metals using a K&N filter, along with the associated high silicon rates. Poor filtration doesn't result in engine failure. It results in the engine wearing out faster.
11-13-2007, 09:42 AM
#39
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An AP2 (2.2l) at 9000 RPM's wouldn't quite suck 300 CFM.
The test mentioned above is as much about aftermarket companies lying at the legal limit as it is about actual performance of the items tested.
The test mentioned above is as much about aftermarket companies lying at the legal limit as it is about actual performance of the items tested.
11-13-2007, 10:45 AM
#40
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Originally Posted by DryCycle,Nov 13 2007, 01:42 PM
The test mentioned above is as much about aftermarket companies lying at the legal limit as it is about actual performance of the items tested.
I'm sure my Comptech foam filter is even worse.