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-   -   K & N reusable air filter question (https://www.dieselbombers.com/diesel-engine-conversions/54068-k-n-reusable-air-filter-question.html)

Diesel lover 07-08-2010 02:35 PM

K & N reusable air filter question
 
Has anybody used a cleaner and oil other than K&N,s? I'm sure there is a similar product out there but I wanted some input from the experts. What has worked and what should I stay away from. I have had my truck for 19 years and never used anything else.

DIRTYMAX2004 07-08-2010 03:00 PM

i would stay away from oiled filters.

Diesel lover 07-08-2010 03:15 PM

How so? It is factory recommended to clean it and then re-oil it. It has lasted for years this way. Is there another way?

DIRTYMAX2004 07-08-2010 03:22 PM

No i ment all oiled filters. I used to run the K&N. Diesels suck a lot of air and they tend to suck the oil out of the filters and into the intake. dont take my word for it. it is just how i feel.

NadirPoint 07-08-2010 03:35 PM

They also let more dirt in.

Deezel Stink3r 07-08-2010 03:43 PM

Look, Diesel lover

most members have modified their engines in that way to deliver huge hp.
I mean really huge hp in relation to engine size and seen with my european eyes.

To make power you need air- lots of air! I never heard of a BHAF before coming to this site.
A bigger filter does offer a lot more filtration surface. more surface means less backpressure for the turbo to work against.
A cotton based filter does offer more flow- but there is a huge disadvantage with those filters. They are not fine enough. To much dirt can pass into the intake.
But dirt is the biggest enemy of your engine and your turbo- it acts as an ultra fine sandblaster on those extrem high turning blades and of course between the rings and cylinder walls.

A standard paper filter still does offer very good filtration abilities, but it cloggs relative quick. So Bombers use an oversized filter made of paper and/or synthetic fiber to combine both worlds. Flow+ filtration equals in clean air for huge hp numbers.

Just ask or look what Bombers use in your truck model. Maybe you ask a sponsor about a price- they will be happy to assist you in getting the right one.

In my personal opinion K&N is good for race use- if you don't have to look on engine wear -because they rebuild it anyway after each race.
But for the daily dusty use- just stick with fibers or paper.
:hellox:

Deezel Stink3r 07-08-2010 03:59 PM

I was using the K&N's too for 5 or 7 years and I always found a fine layer of dust in the intake, thinking that the rubber seal was not sealing thight enough- no, it was dirt, extreme fine dirt...
Today I'm back to paper/fiber filters, buying them in a bunch makes them cheaper and I do change more often, because I know we (humans) have the nasty habit to squezze the most out of everything.

Diesel lover 07-08-2010 05:22 PM

Thats good info. All this truck does is pull. Boats, equipment trailers and a travel trailer. It is a lot of wear and it works hard. It has over 200,000 miles on it and I don't want it to work harder than it has to. Thats why I come here, Thanks for the help. BHAF?

Dr. Evil 07-09-2010 12:26 AM

3 Attachment(s)
Big Honkin Air Filter...= BHAF

Napa 2790 is the part number.

IMHO, oiled filters are ok, as long as they are serviced properly. That being said, I would stay far away from a K&N - there are MUCH better options (both oiled and dry).

Heatshield:

Attachment 46403

BHAF and prefilter:

Attachment 46404


Attachment 46405

Uncle Bubba 07-09-2010 02:13 AM

I'm the oddball here. Hate the K&N drop in replacement filters but love my K&N Cone Type replacement filter. I've got over 200,000 miles on it. Clean it, bah humbug. They filter better when they look dirty. If that filter minder isn't movin then that filter is flowin, no matter what it looks like.

I've cleaned mine twice in all these miles and this is a farm truck runnin hay fields an pastures for a livin.

NadirPoint 07-09-2010 07:23 AM

Bubba, you should get a used oil analysis and see how much dirt is in your oil. I ran several oil analysis on my 1st Gen to establich the change intervals after I first got it with a K&N filter installed by the PO. Silicon slowly rose higher and higher over a two year period, until wear metals followed, indicating accelerated engine wear.

You can probably just subtract the 200k miles off the end of your engine life.

Dr. Evil 07-09-2010 09:54 AM

Sorry, as to the K&N I should clarify that Im talking about the K&N brick filter that fits in the oem filter housing. The K&N does flow very good but I clearly had visible holes in the filter media - Im thinking that would let a lot of dirt in. Maybe my filter was defective? - I dont know. I have not used a K&N cone filter so I cant comment on that.

Not sure I would be as bold to say that using a K&N will cut 200k off your engine life.

NadirPoint 07-09-2010 10:04 AM

Like I said: "probably." What are the real numbers over the life of an engine? Who knows. Wear is wear. Will it manifest with ever increasing blowby from losing the rings? Or will it let go suddenly after a rod starts knocking? Who knows.

What's your acceptable engine wear comfort zone?

Dr. Evil 07-09-2010 01:35 PM

later instead of sooner...lol

Diesel lover 07-09-2010 04:16 PM

1 Attachment(s)
My oil is changed often! This truck has been my pride and joy for years and my wife said she will bury me in it. My son said hell no! that's a a waste of a good truck.My filter may not be a BHAF but it does seem to get the job done. I do agree that more air in equals better performance

ForcedInduction 08-02-2010 01:46 AM


Originally Posted by Diesel lover (Post 586532)
and what should I stay away from.

K&N filters.


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