dps1947
Ottawa, ON
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Joined: 12/10/2007
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I have a 2007 Chevy Silverado with the 6.6L diesel. I know that there is a K & N filter kit available. Just wondering if anyone has used it and if so, has it shown an improvement on mileage and performance...etc? There is a sensor on the intake tube. When disconnected for the K&N filter kit, will this result in an engine maint code? Is there an increase in noise?
Thanks for any info/feedback.
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MadMav
Colorado Springs, CO
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Joined: 03/12/2007
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Diesel Power or World magazine did a test on an 07 and they got 22 more horse power than stock with the K&N. True or staged, you be the judge. Most don't trust the K&N filtering ability though.
Mav
Maverick
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CTD2003
Arizona
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Joined: 01/24/2006
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Don’t do it stick with the stock! K&N filters are fine for gassers but diesels take a much larger volume of air, you don’t want to dust that Max do you. I tried a AFE filter for a few thousand miles on a Cummins and saw no HP gain or mpg gain even the EGT was no different. Spend your money on a nice camping trip!
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bldrbuck
Boulder, Colorado
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Joined: 02/11/2001
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use the search feature there are hundreds of posts about K&N. I have one and found it did nothing for performance and was a pain to clean and re-oil. It is in its box on a shelf in the garage. I use the stock paper filter.
93 Ford F350 Turbo Diesel, DRW, Crew Cab. PullRite Hitch. 90 Nomad 28' 5er, 375 Watts Solar, 2800 Watt Yamaha Generator, 1750 Watt Inverter, 4 Trogan T105 Batteries, Spare tire and wheel and folding ladder. Me, wife and 2 spoiled Maltise furkids.
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ronfisherman
SE Michigan
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Joined: 06/05/2006
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Lots of better upgrades to put on a Duramax than a K&N filter. Checkout Diesel Place for info on filter upgrades.
2004 Gulf Stream Endura 6340 D/A
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Clattertruck
Centennial Colorado
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Joined: 06/19/2003
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For people who would like some test information on filter performance, here is a post from another forum:
“This report presents the results of an ISO 5011 test of several air filters designed for the GM Duramax Diesel. The test was independently performed under controlled conditions using a $285,000 machine at Testand Corp of Rhode Island (manufacturer of the machine).
Arlen Spicer, a GM Duramax Diesel owner/enthusiast organized the test. Testand offered to perform the tests at no charge. (These tests typically cost approx $1700.00 per filter). Ken (and employee of Testand), a Diesel enthusiast and owner of a Ford Power Stroke Diesel, shared Arlen’s interest in performing an accurate unbiased test of different types and brands of diesel engine air filters.
The filters used in the test were purchased retail and donated by Arlen and other individual Duramax Diesel owners. The detailed reports from the test have been compiled and are presented in the following pages. The final pages of this report present the behind the test.
ISO 5011 Test:
The ISO 5011 Standard (formerly SAE J726) defines a precise filter test using precision measurements under controlled conditions. Temperature & humidity of the test dust and air used in the test are strictly monitored and controlled. As Arlen learned in attempting his own tests, there are many variables that can adversely affect filter test results. A small temperature change or a small change in humidity can cause the mass of a paper filter to change by several grams.
To obtain an accurate measure of filter efficiency, it’s critical to know the EXACT amount of test dust being fed into the filter during the test. By following the ISO 5011 standard, a filter tested in Germany can be compared directly compared to another filter tested 5 years later in Rhode Island. The ISO 5011 filter test data for each filter is contained in two test reports; Capacity-Efficiency and Flow Restriction.“
Filtering Efficiency:
Filtering efficiency is a measure of the filter's overall ability to capture dirt.
Accumulative Capacity:
“Accumulative Capacity” is a measure of dirt holding/loading capacity before reaching the maximum restriction limit.
Initial Restriction + 10 IN-H20.
Accumulative Gain:
"Accumulative Gain" is the total amount of dirt that passed through the filter during the test.
(Note: The Purolator was reported to have a seal malfunction during the test and passed more dirt than it would have with a good seal.)
Initial Restriction:
Initial Restriction is the Filter under test’s resistance to flow at 350 CFM.
Dirt Passed Versus Total Test Time
This graph shows each the duration of each filter’s test versus dirt passed (Accumulative Gain).
(Note: The Purolator was reported to have a seal malfunction during the test and passed more dirt than it would have with a good seal.)
In the chart above it’s important to note the different test durations for each filter. The AC Delco filter test ran for 60 minutes before exceeding the restriction limit while the AMSOIL and K&N tests each ran for 20 and 24 minutes respectively before reaching max restriction.
In 60 minutes the AC Filter accumulated 574gms of dirt and passed only 0.4gms. After only 24 minutes the K&N had accumulated 221gms of dirt but passed 7.0gms.
Compared to the AC, the K&N “plugged up” nearly 3 times faster, passed 18 times more dirt and captured 37% less dirt. See the data tables for a complete summary of these comparisons.
 "
Clattertruck
2008 SD F450 PSD 6.4L CC 4X4 DRW, Lariat Auto trans 4.30 LS, 2008 Snowriver 108 truck camper. Jeep Unlimited Rubicon as toad.
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Delaine and Lindy
Linden Tn. (The View)
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There is your answer, Gadgets don't work they are just Snake Oil. GBY...
2008 Chevy Silverado LTZ 3500, DRW
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jim87vette
Arizona
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Good data, guess that solves it thanks for the info.
08 GMC 3500 Dually Duramax
96 Chevy 2500 6.5
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NC Hauler
Asheville NC
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As they say, "one picture is worth a thousand words"...though it was more then one picture, I would think most would understand all the data listed above, and pretty well answer the question that was asked...great post & info... Good job Clattertruck
***YO, Moderator, anyway you could make those charts a "sticky"? It is very good info given in chart test info compilation. This question comes up quite often...Could be posted as diesel air filter info or something like that...it is some very good input on after market air filters for diesels vs. OEM...
Jim & Kathy
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killerbee
PHOENIX USA, Never hot
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If you want further insight into those charts:
http://members.cox.net/td-eoc/INTAKES.doc
Duramax Cooling System Evaluation
Intro to TURBODIESEL INDUCTION OVERHEATING
THERMAL FEEDBACK and INDUCTION OVERHEATING
GM Overheating
Engine Oil Cooling
FORUM for Duramax Performance
Tune Your Own GM Vehicle
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