This thread might interest you

http://www.peachparts.com/shopforum/diesel-discussion/

[G-Benz]

The link displays the entire Diesel Discussion page...any thread in particular?

I've thought about which forum to start this thread in, and I finally decided on the Diesel Discussion forum because these tests were performed on a Chevy Duramax diesel.

Enjoy...

[url]http://home.usadatanet.net/~jbplock/ISO5011/SPICER.

#2 Yesterday, 08:15 PM
H2O2
Wer reitet so spat... Join Date: Jan 2005
Location: Moulon Rogue
Posts: 25

Thanks, it just confirms my worst suspicions. Please don't waste your money and potentially harm your engines with this hazardous snakeoil.
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#3 Yesterday, 11:07 PM
whunter
Senior Member Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 2,306

Yes.

--------------------------------------------------------------------------------

Please put a K&N filter on every engine you own, your mechanic needs the work.
The engine rebuilder wants you to.

The best reason to put a K&N filter on a car:
It looks cool as it destroys your engine.



Never put a K&N filter on an engine you want to last more than 8 seconds.
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#4 Today, 05:59 AM
MS Fowler
Registered User Join Date: Jan 2003
Location: Bel Air, MD
Posts: 573

WOW! That is an impressive report. Of course, EVERY decision in an automobile is a compromise. Many people chose better handling while sacrificing some comfort, Better brakes when they are hot, usually means a harder pedal before they warm up, Attractive styling or utility. Compromises everywhere.
You can't get increased airflow without allowing more dirt. Considering what (any) diesel engine costs to repair, I'll err on the side of protection and let the ricers win all the drag races. My car will still be on the road long after their vehicles have been crushed and recycled, ( barring accident, etc).
Hats off to a couple of guys who provided a great service.

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#5 Today, 09:04 AM
Pete Burton
Registered User Join Date: Dec 2002
Location: Old Saybrook, CT
Posts: 803



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Worth the quick read - should be enough for even the most stubborn modifying proponent to realize that spending money to butcher whoops, I mean add a K&N filter to their diesel is one of the most ill informed and pointless action one could make!
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#6 Today, 11:20 AM
SilentMethod
2001 ML 55 Join Date: Nov 2004
Location: NY
Posts: 29

Wow - Going to get a Stock filter on my ML55 ASAP. Just blew 60 bucks on the K&N.
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#7 Today, 11:40 AM
ayalar007
Registered User Join Date: Apr 2004
Location: Miami
Posts: 116



--------------------------------------------------------------------------------

You know what really pis$$es me off??? The fact that when I first got my diesel, I had no idea that this forum exsited. All I knew was that there was a company called Performace Products that made parts for Mercedes because a catalog was left in the trunk by my dad. Now I read this after installing a K&N filter (who by the way, Performance Products praises. This is a direct quote from the catalog: Easy Drop In Installation, Replaces Stock Filter, Better Airflow for Maximum Torque, Increased Gas Mileage, Million-Mile Warranty: Airflow to your engine is one of the most critical areas affecting the performance of your vehicle and one of the easiest areas to upgrade. Original equipment air filters on new vehicles are generally very restrictive. This is due to their paper construction that actually limits engine breathing. That's why we recommend K&N, the leader in filter technology as proven by their heavy use in both on and off-road racing)
now, without knowing about those numbers before I feel like such an idiot, for spending that kind of money.

I guess I'll have to mark that off to experince I guess. Does anyone know if AC Delco makes filters for our babies?? Thanks for the info VeeDubTDI
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#8 Today, 11:58 AM
SilentMethod
2001 ML 55 Join Date: Nov 2004
Location: NY
Posts: 29

Hold up...This is the response i just recieved from K&N.

Dear Customer,

We have seen this report mentioned from other customers before. However,
there are many problems with both the findings and also the way in which
the tests were conducted. First, the data was collected with varying
conditions for every test. The largest discrepancies were in humidity
and temperature. The conditions that this test were conducted does not
actually follow the ISO 5011 standards. Also, using their own data
(which was gathered in an imprecise manner), the math for the K&N filter
is calculated wrong. Since the time this test was posted, the data
numbers has also changed more than a few times.

These discrepancies point to the validity of this test. K&N's are
routinely tested both in house and by independent 3rd party labs. In
every test, K&N's either match or outperform stock filters in the areas
of filtering efficiency, total dirt capacity, and airflow. Ford buys our
filters direct and sells them through their dealerships. More and more
dealerships of all manufacturers are buying our filters direct and
offering them for their customers. We have been making our filter for
almost 40 years. If there was any issue with filtering efficiency, we
would not be in business.

K&N is and has always been dedicated in providing a quality product that
matches or exceeds the OEM filter, helps improve performance, and
reduces waste by not having to throw away a paper filter every year.
Please feel free to contact us if you still have questions or concerns.

Thanks for writing,

Shaun McClure
Technical Support
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#9 Today, 12:03 PM
dannym
Registered User Join Date: Oct 2004
Location: Orlando, Florida
Posts: 104

WOW,
I had no idea K&N was that bad. I wasn't going to use one in my car but I do have one in my motorcycle. Where it is a common practice. I'm wondering now if I should take it out.

Danny
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#10 Today, 12:03 PM
aklim
Registered User Join Date: Apr 2000
Location: Location: Madison, WI, USA
Posts: 692

I used to have a 99 Ford Ranger and on the Ranger boards, people are having problems with the MAF when they have the K&N. Seems like the solution was to hose down the elements every so often with brake cleaner. Don't know why but early 90s Mustangs and pre 90 F-bodies didn't have problems with them. Seems like the latest MAFs now are having problems. Don't know why.
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#11 Today, 12:15 PM
SilentMethod
2001 ML 55 Join Date: Nov 2004
Location: NY
Posts: 29

Look at the thickness in the filters, i guess that says it all!
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[G-Benz]

This issue has come up a lot on this forum...so far the jury is out though...a few K&N users have said there are no adverse issues with their MBs.

There is also another oil thread with regards to using Fram oil fiters on MBs...kinda the same tone...

[whunter]

Originally Posted by SilentMethod

I've thought about which forum to start this thread in, and I finally decided on the Diesel Discussion forum because these tests were performed on a Chevy Duramax diesel.
Enjoy...

Why copy the thread???
It is better to link to it...

K+N Filters are a bad idea for diesel engines.
http://www.peachparts.com/shopforum/diesel-discussion/134111-k-n-filters-bad-idea-diesel-engines.html#post984635