Air Filter Study.

[Gypsyman]

Like I said, If I could have gotten another 4" ANYTHING into the engine compartment this would be a non issue. I even looked at cutting out a portion or the plastic fender well and putting one under/behind the bumper. I had the smallest filter to flow ratio housing that I thought we could live with and I could find no way (even with major fab) to make anything work. I truly hope someone can prove me wrong...



Richard

 

[DocDetonancour]

Do any of the aftermarket filters lower EGT w/o other mods? Thanks, Doc

 

[jnelson]

Ran 433,000 on my last CTD in 4 years running just K&N filters. Traveled 1,000's of miles down some the dustiest, dirtiest oilfield roads around. Never had no trouble. engine was pulling just as good at 400,000 as it was a 1,000 miles.



I have switched over to an Airaid filter though. They are designed somewhat like the K&N but only better quality. There is twice as much filtration media in the Airaid as opposed to the K&N. Still keeping air flow at +- 50% better than stock filters.



. 02

 

[Matt400]

I found this air filter study over on The Diesel Place. It is the most comprehensive study of air filters I have ever seen. This was performed in a labratory enviroment with equipment soley designed for this purpose. It is a long thread but the results can be found on the last page. This should answer a lot of questions that people have as to which filter is better for our trucks. FWIW I belive the aFe used was a Pro7.



http://dieselplace.com/forum/forum_posts.asp?TID=10642&PN=1



Rosco

The link doesn't work anymore, is there another one posted somewhere else?

 

[steved]

Are there really any horror stories about K&Ns causing major damage? I've heard plenty of people say they let too much in, but never heard anybody say that it screwed up their engine.

Yes, there are plenty off horror stories about the K&N, but I believe they have since redesigned their filter the last I read about them...



steved

 

[steved]

Great series of tests. Based on the results, it certainly seems that if you want maximum filtration capacity, your OEM paper is best. By that kind of logic, then, if you want really good filtration AND high flow rates, a BHAF is the only choice.



I currently run the stock intake system and stock filters.

When I first got my stock airbox, I could pull the filterminder completely in on a new filter...



I replaced the OE filter (which the pleats are glued to the point there is only a very small opening) with a Wix and that helped... I also grease the sealing edge, just in case.



I then drilled a bunch of holes in the box to allow more air through and that seems to have helped immensely...



I ran a K&N on my 99 and saw dirt in the intake and didn't even need a "white glove" to sie that it was that bad. I have a Amsoil oiled-foam filter that works extremely well, but it is a PITA to clean.



steved

 

[Matt400]

With oiled filters there is room for error, too little oil passes allot of dirt and too much oil restricts flow. On Gas models I see Mass Air Flow Meter contamination but haven't seen that yet on the Cummins intake/ambient air temperature sensor.

 

[Matt400]

I ran a K&N on my 99 and saw dirt in the intake and didn't even need a "white glove" to sie that it was that bad.

I had an 02 in the shop last week with one of those and it was horribly dirty at the turbo inlet.

 

[1965LONEWOLF]

I Use A Amsoil Paper Filter In The Stock Box With The 4" Mod Done To The Bottom Of The Stock Box , It has Never Sucked It Down And Its Getting Plenty Of Air To Breath And It Cost Me Less Than A 1/4 Of What They Want For The Big Fancy Air Cleaners, Unless Your Planning On Making 700 Hp Or More And Your Trying To Get Every Little Oz Of Power Than I Think My Set Up Works Great And Its Cheap To Do And Maintain :-laf

 

[steved]

I Use A Amsoil Paper Filter In The Stock Box

If you are talking about the nano fiber one, I don't like the fact they only have a a 100k life span. I liked their oiled foam, but not the nano fiber.



steved

 

[amsoilman]

If you are talking about the nano fiber one, I don't like the fact they only have a a 100k life span. I liked their oiled foam, but not the nano fiber.



steved

THat's about $11. 75 per year, if you go for their 4 year warranty, and that is at the retail price! Very inexpecive, and super filtration!



Wayne

 

[steved]

Considering some of us put more miles on that that per year... not everyone does the "typical" 12k miles a year.



With the four year/100k warranty... sounds to me like the nano fiber technology isn't that durable... just my opinion. I don't know of too many filters that could handle being blown out with compressed air, where the compressed air doesn't move the fibers around. And as we discussed before, my filters turn icky oily black...compressed air would not blow that stuff out of the filter.



steved

 

[Regcabguy]

Stock filter.

I don't know if D/C redesigned the '07 airbox,but under full throttle with the stock airbox and filter my filterminder doesn't budge. I've read many reports of 3rd. gen guys with stock hp and filters pulling the filterminders down from day one. I went down this whole filter trip with my '99 and settled on the stock box with Amsoil nano. Works great!

 

[amsoilman]

Considering some of us put more miles on that that per year... not everyone does the "typical" 12k miles a year.



With the four year/100k warranty... sounds to me like the nano fiber technology isn't that durable... just my opinion. I don't know of too many filters that could handle being blown out with compressed air, where the compressed air doesn't move the fibers around. And as we discussed before, my filters turn icky oily black...compressed air would not blow that stuff out of the filter.



steved

Steved,

THese filters are "DRY" filters... ... ... ... ... ... ... not oiled, so I don't know where you would get the oil into your turbo.



Amsoil recommends cleaning these filters every 25,000/1 year in "Normal" driving conditions, by vacuuming, or using 10-15 PSI shop air... ... ... ... ... ... ... ... ... ..... not HIGH PRESSURE compressed air.



This same technology is being used in the Abrahms M-1 Tank in Iraq and other military operations.



Wayne

amsoilman

 

[05mxdiesel]

Steve, the ea nanofiber filter from amsoil is worth it for the $50 it costs. Virtually no maintenance to it and great filtration. I started off with a true-flow oiled filter just like the amsoil and had a hard time getting it clean like you said, plus I had to let dry for a day or two before I could run it again. Drop in the ea filter an pretty much forget it for 20k unless your in severe conditions. I like it and my uoa show great filtration as well.

 

[jelag]

I haven't read all the posts here... . but the TDR published an article by Cummins 2 or 3 years ago... . Cummins found 2 of their own filters not meeting the design standards for the engine so they went back and redesigned them... . and found non of the aftermarket designs that would stop the small dirt they wanted to stop... . nor would they handle the large amounts of air over time... so since we've stayed with name brand stuff... Donaldson, Mopar, and Cummins filters... . it just seems to make sense...

 

[JStieger]

After much thought, I am going to try the nanofiber Ea cone filter #4510 with my twins.



Quick calcs comparing my AFE PG7 cone filter to the 4510 suggests slightly more surface area with the 4510.



If it flows the same or more than my AFE while reducing the Si from ~15 to ~5 ppm like I had with my UNI foam filter and single turbo, I'll be happy.

 

[rbattelle]

The link doesn't work anymore, is there another one posted somewhere else?

Here's a new link.



Ryan

 

[Tryingit]

I saw this test approximately two years ago. I don't believe that was a proguard 7 filter. There was a lot of speculation back then. It would be interesting to see some of the more modern filters. Would love to see how the dryflow rates. I also read some data on one of these forums that the BHAF flowed somewhere in the are of the stock filter. The larger surface area was designed to allow the filter to last much longer as opposed to flowing hugh amounts of air. I own just about every filter, Scotyy III, Bhaf, AEM and my current S&B with the dryflow. According to my gauges it seems to make MY truck the happiest. Oo.

 

[Gary - K7GLD]

According to my gauges it seems to make MY truck the happiest.

Your "gauge" would probably be even "happier" with NO filter at all - but the engine and oil analysis sure wouldn't! :-laf



The trick is balanceing BEST filtering with BEST airflow using the physical space available - and that ain't always easy! :-laf