new filter and "outerwear" lol - Ford Powerstroke Diesel Forum
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Old 10-16-2012, 05:38 AM
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new filter and "outerwear" lol

ive had a diy tymar for a while now and my filter was real dirty. was napa's gold (wix) filter sale last week (always the 2nd week of october). like over 50% off. got my 6637 for $29 and a pair of q size pantyhose for a couple bucks. hope it helps keep a little crap out of it lol
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Old 10-16-2012, 06:48 AM
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lol wtf......
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Old 10-16-2012, 09:25 AM
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Just a FYI but these ilters will hold over 1lbs of dust and still flow the air your motor needs...

Using one on a non Donaldson is a good idea but its just not needed...

Total waste of money from a performance perspective. They do everything they are not supposed to do. They lower flow by causing additional restriction, have no surface area for high volume, and are unnecessary if you use the properly rated element for the application.

From a filtration view, they can increase filtration efficiency in applications where the filter used has very poor filtration efficiency (ie: reusable/cleanable elements, K&N, AFE, etc). However, they do it will a substantially smaller surface area that has basically no capacity to speak of. It will also measurably affect your flow rate negatively from the increase of the restriction, because you are, in affect, adding an additional layer of filtration with no surface area.

Think about these numbers:
Surface area of Donaldson on the Tymar Intake: 4,000 sq in
Surface area of a K&N conical style: 975 sq in
Surface area of a filter cover: 150 sq in

Donaldson has 4 times the surface compared to the K&N, which is significant in its own right, but 270 times the surface area compared to the filter cover, making a filter cover nothing but a hindrance. Filter covers originated from reusable elements inability to filter the air of a dusty environment. Using a proper filter with a proper filtration efficiency and you don't need to worry about it.

Same thing with the guys using them to protect an open element using an improper filter from experiencing water mist. If you use a proper filter for the application that uses a hydrophobic (water resistant) filter media you don't need additional layers adding restriction and lowering flow to gain protection. Again, use a proper filter you don't need to worry about it.
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Old 10-16-2012, 11:53 AM
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thanks for all the good info. im glad i didnt spend out for a real outerwear now. i have a blow gun comb wand at work and i have blown out my old filter @3 times over the last year and got a ton of dirt out of it. i figured the pantyhose might help a little lol
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