does anyone know the specifics of the stock donaldson filter? Is it multi stage?

I have a few creases in the back side of the filter "dirty side" The mesh pattern is slightly damaged. I wonder if this is a issue, i.e. should I replace the filter because the creases?

 

I don't know much about them except it's a big roll of cardboard with some blue stuff on it. I can't see how creases would hurt a thing since eventually it'll be replaced.

I took one apart and the roll must've been at least 50' long.

 

What do you mean eventually it will be replaced? you mean when I replace it?

Any idea how many layers of media the air has to pass through? there can't be just one layer... I just want to make sure any small tears will not let dirty air though.

 

It doesn't really have layers. Imagine a piece of cardboard rolled up with the corrugated ridges running the length of the filter, in the same direction of airflow. The corrugation creates the airgaps between the rolled layers so you don't end up with a solid roll of paper. The filtered air never actually passes through anything. The dirt just gets stuck to the insides as it goes by. You can see daylight right through a new one..

 

YAA, But they sure do collect the dirt and for a long time.

 

Seriously you can see daylight through it? what traps the dirt?

 

Not quite so simple.

Penn State Department of Architectural Engineering


That is the simplest description of the mechanism.


But in fact, there are more mechanisms at work:


ceeserver.cee.cornell.edu/mw24/cee454/lectures/08%20Filtration.ppt

 

I believe you're fine with the creases...

PowerCore®Air Filters
Donaldson premium air filters that utilize PowerCore™ filtration technology for Ford 6.0L Diesel PowerStroke™ and GM H2 Hummer 6.0L Vortec™ plus other applications listed below. The rugged structure of PowerCore™ filters features an innovative, layered, fluted filter media, which allows air to enter an open flute while forcing it out an adjacent flute, allowing only clean air into the engine. Dirty air is effectively filtered and cleaned in only one pass through the media.

 

Like I posted earlier, I don't know much about them. AFAIK they're magic filters.

Actually, when we cut one apart, I do remember the engine side being much more solid than the inlet side. That must be where the air passes through the adjacent flutes like Moyock posted.

 

A top quality filter like that one will have a lot of "black magic" in it.

Carefully blended fibers to generate static electricity with air flow, mix of fiber densities, etc.

Coatings to tweak it.

None of this they will tell you --- nor is it obvious in a simple examination from cutting it apart.


If it is so easy, you would have the market flooded with Chinese made clones for $5 a filter.

 

AFAIC

 

I don't get it

 

Mike's just ribbin' me. AFAIC /= AFAIK..

 

As far as I know or A far as I'm concerned ??????

 

I know this thread died sometime ago. But i was wondering if anybody was still able to get the blue filter instead of the white one? All i am finding is white.