I had my hopped up 5.0 Mustang on a dyno and a stock filter made 309 RWHP, no filter made 309 and the K&N made 307.

Dan

__________________
81 240D 4speed with 300D engine
87 560SL
2005 E320
Yukon Denali
Sierra Denali
850 Turbo Volvo
1996 Mustang
1984 Mustang race car
3 Boats

You mean that in 1 year of use nothing would stick that film of Oil behind the filter inside of the Air Filter Housing?

Here is another opinion from that long thread; see post #20:
http://www.peachparts.com/shopforum/showthread.php?p=1751404&highlight=sand#post1751404


Another item of interest is that it is very hard to find a Micron level of filtration listed for Air Filters.
Several that I did find listed were 15 micron filters (not for Mercedes). So if lets say 14 micron particles are passing through the 15 micron filter those particles are pretty large.
So it is entirely possible that the stock Paper Element Filter is also passing stuff through it that is larger than you would expect.

I reason that most of the Air and Particles inducted into the Engine also pass out of the Engine by way of the Exhaust. The volume of Air with Particles that actually touch/adhere to the Cylinder Walls must be rather small.

__________________
84 300D, 82 Volvo 244Gl Diesel

Hey Guys.Enjoy your paper,and I'll enjoy mine.

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran

Here ya go again guys.

Test results: http://duramax-diesel.com/spicer/index.htm

__________________

Gone to the dark side

- Jeff

Well 617 drivers,and jettas can hear my turbo scream,while I leave you in a cloud of chicken grease.

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran

I am sorry, but you are one of the biggest morons I have ever seen on the internet.



Bobistheoilguy.com is for all your needs.

Also run an oil sample after 10k with the K&N and with the paper, you will see different results.

I can understand one if you are making some massive power, no 400hp is not massive... as you would suck down a paper filter. But you also would not expect a motor making large power to last 100k either.

I still and will always run the factory air intake system on my 6.4 PSD, it uses a huge Donaldson filter element that filters fantastic. It only becomes a restriction around +250rwhp over the factory power. At that level you have very limited towing ability and the vehicle is basically just a performance truck... which is not why I purchased a CCLB 4x4 truck that is near 9000lbs.

I run about +150rwhp which gives a great kick in the pants gain in power but still keeps EGTs well within check for the long term.



INAPPROPRIATE
B.C.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Clearly talikng K&N Air Filters bring out the worst in some people!

__________________
84 300D, 82 Volvo 244Gl Diesel

I read this before. But, it is still not a test of the K&N that is made for the Stock Mercedes Housing.

Just like the WIX Oil filter for the 617.952 has what I feel is an awful 32 nominal micron filtration level; WIX makes a filter For the later model engines that that is in the 20 micron range. So though the 617 filter is poor the other one is fine.

Oddly the Spicer test showed that the K&N had the least restriction when new. Yet, the member with the Mustang said the his stock Air Filter (it preformed the same as no filter) was less restrictive than the K&N.
To me this is evidence that there can be a differance in how the same makers filters perform from one application to the other.

The other part of my point that is overlooked it how well will a Stock Paper Filter perform if part of it is saturated whith Oil Vapor from the Blow By?
I figured that since the K&N uses Oil on it to begin with that if some Oil Vapor got on it it would not effect how it works.

Attached Thumbnails

 

__________________
84 300D, 82 Volvo 244Gl Diesel

air filters aside, thats funny

__________________

I agree that it's not a Mercedes application, therefore an extrapolation. However, if the same filter media is used, if the same foam and oil is used in both designs (?) then it has some value in asessing the performance.

I'm willing to assume that it does, to each his own on this.

The other side is whether the K&N is in any way better than the stock filter, other than its primary function: air filtration. If the air filter housing is a flawed design and difficult to maintain, or the engine already is worn enough that its blowby is creating problems with the paper filter, the K&N makes some sense as an alternative. I'm not in favor of taking out a well-designed and properly functioning filter system to put in a cone filter just for noise or looks, especially considering the difficulty in ducting outside (cool) air into the retrofit, but as with one of my cars, I'm changing the turbo and trying to design an aftercooler, and a cone filter is an easy way to filter air when the engine intake system is substantially modified. Might be my only option.

K&N are for ricers or racers IMO.

__________________

Gone to the dark side

- Jeff

I'd have to say the oily mess is more of a problem then what kind of filter you are running. I rearranged my engine compartment just to get the filter away from the oily mess.



Use a paper filter in an air box if you want, but getting the oily air away from the filter element is nice!

__________________

You could just run a draft tube and vent your crankcase gasses to the atmoshpere. This was the old setup before they started running them back into the air intake for emissions reasons. The 1990 International I used to drive still had a factory draft tube.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

I did that for a while, but the oily air became an oily mess all over my car. plus you could see a cloud form at stop lights, not very "mercedes" in my book, I like the car looking clean.

__________________

Come to think of it, that International did make a little cloud in the driver side wheel well when stopped, as well as leaving a nice slobber puddle on the left front leaf spring.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

The sad part is that other ppl get infractions or banned for personal attacks.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42