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K&N air filter
07-10-2009, 07:27 AM
#26
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SL600
What's interesting is the restriction to flow curve vs. the filtering/dirt plots...looks like there is an inverse relationship to the two; K&N seems to have let in more dirt but flows better; so the real issue is the airborne contaminents; is the dirt/dust particles small or insignificant enough that the differences in values (in this case between AC Delco and say K&N) are negligible??
The K&N and the stock AC Delco filter in the test performed almost the same when they were both clean. The real difference was that the K&N flowed better for longer, as each filter got loaded with dust.
So translation = Change your OEM paper filters often and the performance really isn't that different than with K&N's, but you're sucking in a lot less dirt.
07-12-2009, 11:17 AM
#27
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2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
Try Oil Analysis
If you want a true picture, start an oil analysis program beginning with your next oil change. I have used Titan Labs for many years for my street cars, race cars and aircraft, although there are other good labs too. However, it is considered best to stick with the same lab for consistency. If a serious problem is discovered you will get a phone call. If any item is out of range it will appear on the report. You can equate this to a blood work-up for your engine. High silicone readings indicate a problem with the air cleaner. It will also tell you what condition your oil was in at the time it was sampled. As you create a record you will instantly be able to see if any item changes from what is normal for your engine. Just the peace-of-mind is worth the $25
02-09-2010, 06:49 PM
#28
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1982 300D VNT, 1980 240D 3.0T, 1982 300TD
K&N makes the worst "filters" on the market. They are no more than air strainers coated in oil.
http://duramax-diesel.com/spicer/index.htm
http://duramax-diesel.com/spicer/index.htm
02-10-2010, 07:40 AM
#29
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Four points come to mind about your post:
1. You do know that certain relatively small sizes of dirt have NO effect on ANY engine, aka they are acceptable. That is why a manufacture has requirements for their engine filters.
2. The K/N did flow the best under high loads, aka above 400cfm, which is what you NEED on any FI motor at wide open throttle.
3. Please show me ANY data that has shown that a K/N HAS caused motor damage. By this time, over 30 years, don't you think that there would have been class action law suits against them if they were dropping engines
4. That test was from 2004
Oh well, suit yourself, but I have always used K/N's now for over 25 years with ZERO issues and will continue to do so. Have fun my friend.
As always I have NO interest in K/N's other than one happy customer
1. You do know that certain relatively small sizes of dirt have NO effect on ANY engine, aka they are acceptable. That is why a manufacture has requirements for their engine filters.
2. The K/N did flow the best under high loads, aka above 400cfm, which is what you NEED on any FI motor at wide open throttle.
3. Please show me ANY data that has shown that a K/N HAS caused motor damage. By this time, over 30 years, don't you think that there would have been class action law suits against them if they were dropping engines
4. That test was from 2004
Oh well, suit yourself, but I have always used K/N's now for over 25 years with ZERO issues and will continue to do so. Have fun my friend.
As always I have NO interest in K/N's other than one happy customer
02-10-2010, 08:19 AM
#30
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1982 300D VNT, 1980 240D 3.0T, 1982 300TD
Hold a K&N up to your eye, you can see straight through it.
2. The K/N did flow the best under high loads, aka above 400cfm, which is what you NEED on any FI motor at wide open throttle.
3. Please show me ANY data that has shown that a K/N HAS caused motor damage.
By this time, over 30 years, don't you think that there would have been class action law suits against them if they were dropping engines
4. That test was from 2004
Last edited by 240D 3.0T; 02-10-2010 at 08:23 AM.
02-10-2010, 08:55 AM
#31
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Incorrect. There is no acceptable dirt size.
Hold a K&N up to your eye, you can see straight through it.
Wrong my friend. Due some resdearch please. Or are you trying to tell us that particles at 1.0 micron hurt
The stock filter flows all the engine can use and more. There is no benefit to a K&N on a street engine, WOT operation is less than 1% of operating time. The 2 extra hp it flows is not a worthwhile trade-off for reduced engine lifespan and the extra maintenance a K&N requires.
Wrong again, the stock filters do NOT flow enough. Dyno's have proven this. I will agree that MOST drivers are not at wide open throttle for very long. however I am a road racer so this is NOT my case
Google it. Take your hands from over your eyes. No amount of proof will convince the willingly ignorant. Thats why religion and MPG scams still persist so strongly today despite the mountain of proof against them.
I give you B for ***** on this stetment and will leave it alone But yet you have given NO PROOF to back up your dribble
No. Has there been lawsuits against manufacturers of intake swirlers, magnetic fuel line clips or hydrogen generators? None of them do as advertised either.
Very true, but where is the K/N law suit which I was talking about
SO? Its using a standardized ISO test that can be repeated by anyone, anywhere at any time to produce directly comparable results. K&N filters have been the same design since the 1970's, so your 5 year argument just shows you're grasping at straws trying to make excuses.
Hold a K&N up to your eye, you can see straight through it.
Wrong my friend. Due some resdearch please. Or are you trying to tell us that particles at 1.0 micron hurt
The stock filter flows all the engine can use and more. There is no benefit to a K&N on a street engine, WOT operation is less than 1% of operating time. The 2 extra hp it flows is not a worthwhile trade-off for reduced engine lifespan and the extra maintenance a K&N requires.
Wrong again, the stock filters do NOT flow enough. Dyno's have proven this. I will agree that MOST drivers are not at wide open throttle for very long. however I am a road racer so this is NOT my case
Google it. Take your hands from over your eyes. No amount of proof will convince the willingly ignorant. Thats why religion and MPG scams still persist so strongly today despite the mountain of proof against them.
I give you B for ***** on this stetment and will leave it alone But yet you have given NO PROOF to back up your dribble
No. Has there been lawsuits against manufacturers of intake swirlers, magnetic fuel line clips or hydrogen generators? None of them do as advertised either.
Very true, but where is the K/N law suit which I was talking about
SO? Its using a standardized ISO test that can be repeated by anyone, anywhere at any time to produce directly comparable results. K&N filters have been the same design since the 1970's, so your 5 year argument just shows you're grasping at straws trying to make excuses.
Again, my proof is from the track, my engine builders, and tear downs.
Where's yours my friend
02-13-2010, 11:53 AM
#32
MBWorld Fanatic!
For example, I have a N/A CLK55 and I discovered that my OEM air filter has the same part number as the CLK320, CLK350, CLK430, CLK500, etc. etc.
I find it hard to believe that my 5.4L engine would have the same "air appetite" as a CLK320.
So I changed to new K&N filters for 20K miles and the never looked back. BTW, the MAF sensor is perfect and there is no oil that is being sucked from the filter into the engine.
