The Truth About K&N Intakes - Ford Powerstroke Diesel Forum
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post #1 of 33 Old 09-03-2012, 11:45 AM Thread Starter
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Exclamation The Truth About K&N Intakes

So Ive heard the good and bad about K&N products and thought that I would see for myself. So, I decided to buy the K&N intake and see what happens... How bad could it be? K&N is a trusted brand right? Im not going to bash them, but here is my personal experience: 5k miles ago, I spent all of my part time paycheck and bought one of these intake systems, spent a good 45 minutes installing it and was quite impressed when I was finished. Noticed better throttle response and a great open element turbo sound.

5k miles later now after checking/rechecking the intake every few hundred miles to make sure nothing had come loose/shifted and everything was solid, I decided to take a look at the turbo to get an idea of just how much dust and dirt this thing was letting in. I opened it up and was immediately shocked to see that the inner walls of the intake were caked with dirt!

This truck is my weekend driver/hauler and sees a slowly-driven dirt road once every other week (by itself and NOT driving behind somebody else who has kicked up a dirt-road-cloud). I had purchased a 6637 at the same time for fear that this might happen and have installed it immediately (still using the K&N intake pipe).

So for any other folks looking to upgrade their intake, I say forget the fancy intakes that go for several hundreds of dollars and look for the NAPA 6637... Cant be any worse than my K&N at only around $40.

Will upload photos when I can get to a computer.


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2001 7.3L
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post #2 of 33 Old 09-03-2012, 11:49 AM
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looking forward to seeing the pics.


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post #3 of 33 Old 09-03-2012, 02:17 PM
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I bought my truck used and it had the k&n intake on it. I run a dryflow filter tho. So the 6637 filter fits on there?

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post #4 of 33 Old 09-04-2012, 08:29 AM Thread Starter
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Quote:
Originally Posted by belz View Post
I bought my truck used and it had the k&n intake on it. I run a dryflow filter tho. So the 6637 filter fits on there?
Sure does. Fits right in and clamps down like it was made for it...so I guess the K&N wasn't a total loss


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2001 7.3L
Pro Comp 6.5" Lift
Pro Comp 16x10 Alloys
35x12.5 Nitto Mud Grapplers
Sky Jacker Hydro 7000 Steering Stabilizers
K&N CAI JUNKED For A 6637
Straight Piped Dual 4"
Jasper 4R100 (Rebuilt in '05)
Tru-Cool Max
Dieselsite Coolant/Trans Filters
ISSPRO EV2 (Boost, EGT, Trans)
Centramatics
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'07 Headlight Conversion
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post #5 of 33 Old 09-04-2012, 08:47 AM Thread Starter
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Here are a couple of the photos taken yesterday. You can see the thick layer of dirty sludge built up around the inside of the intake.
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2001 7.3L
Pro Comp 6.5" Lift
Pro Comp 16x10 Alloys
35x12.5 Nitto Mud Grapplers
Sky Jacker Hydro 7000 Steering Stabilizers
K&N CAI JUNKED For A 6637
Straight Piped Dual 4"
Jasper 4R100 (Rebuilt in '05)
Tru-Cool Max
Dieselsite Coolant/Trans Filters
ISSPRO EV2 (Boost, EGT, Trans)
Centramatics
EBPV Switch
'07 Headlight Conversion
Foil Delete
Zoodad
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post #6 of 33 Old 09-04-2012, 09:25 AM
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Quote:
Originally Posted by AgTires4295 View Post
Here are a couple of the photos taken yesterday. You can see the thick layer of dirty sludge built up around the inside of the intake.
Thats oil residue from the CCV, perfectly normal.


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post #7 of 33 Old 09-04-2012, 09:44 AM
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A K&N ...guys don't even use them on quads and bikes anymore....pass to much dirt.
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post #8 of 33 Old 09-04-2012, 09:58 AM Thread Starter
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Quote:
Originally Posted by Eric@PTP View Post
Thats oil residue from the CCV, perfectly normal.
I know the CCV is going to leave an oily residue on the inside of the intake but all of this dirt mixed with it is normal?


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2001 7.3L
Pro Comp 6.5" Lift
Pro Comp 16x10 Alloys
35x12.5 Nitto Mud Grapplers
Sky Jacker Hydro 7000 Steering Stabilizers
K&N CAI JUNKED For A 6637
Straight Piped Dual 4"
Jasper 4R100 (Rebuilt in '05)
Tru-Cool Max
Dieselsite Coolant/Trans Filters
ISSPRO EV2 (Boost, EGT, Trans)
Centramatics
EBPV Switch
'07 Headlight Conversion
Foil Delete
Zoodad
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post #9 of 33 Old 09-04-2012, 10:05 AM
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i did seem to see dirt in the oil. appon removal of the factory system the oil seemed clean. HOWEVER i have drivin my K&N on dirty dusty nasty roads for about 30,000 miles and my tube and turbo show nothing near that bad or dirty. so perhaps you clamped the filter on and left a gap at the bottom or something.... i mean yes there was more dirt in the turbo than stock but not that bad overall.... although i do use a heavy coat of oil on my filter.

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Thanks to bigblack for selling me his truck
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post #10 of 33 Old 09-04-2012, 10:23 AM Thread Starter
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Originally Posted by MyTractorsSexy View Post
i did seem to see dirt in the oil. appon removal of the factory system the oil seemed clean. HOWEVER i have drivin my K&N on dirty dusty nasty roads for about 30,000 miles and my tube and turbo show nothing near that bad or dirty. so perhaps you clamped the filter on and left a gap at the bottom or something.... i mean yes there was more dirt in the turbo than stock but not that bad overall.... although i do use a heavy coat of oil on my filter.

I checked every few hundred miles to make sure there were no chances of having any gaps anywhere

But I have moved on to the 6637, so I'll let yall know how this compares to the K&N (under the same conditions to minimize variables) in another 5k miles. We shall see which one is better (for me)


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2001 7.3L
Pro Comp 6.5" Lift
Pro Comp 16x10 Alloys
35x12.5 Nitto Mud Grapplers
Sky Jacker Hydro 7000 Steering Stabilizers
K&N CAI JUNKED For A 6637
Straight Piped Dual 4"
Jasper 4R100 (Rebuilt in '05)
Tru-Cool Max
Dieselsite Coolant/Trans Filters
ISSPRO EV2 (Boost, EGT, Trans)
Centramatics
EBPV Switch
'07 Headlight Conversion
Foil Delete
Zoodad
Monitoring with Torque
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