MORE Media Permeability Data

[jason07-1zzfe]

For original tests(K&N and M1) see:
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=6;t=000442

Frazier Air Permeability was tested on a BMW spin-on filter and an Amsoil SDF34.
Results are expressed in CFM/sq. ft. @ .5 in. of water.

code:

---

BMW Amsoil

1) 110.8 25.13

2) 105.3 24.71

3) 109.0 24.92

4) 109.9 24.92

AVG. 108.8 24.92

---

Comments:
BMW: Holy flow Batman. No wonder my oil pressure went up when I went to the BMW filter. Not only does the media flow like crazy. It has tons of media area and awesome contruction, It is almost a work of art. It has 66pleats 230sq. in., which is about as much as can fit and they are perfectly spaced. (As a comparison the SDF34 is the exact same size filter, the difference being it has a much lower bypass setting and different type ADBV, and it has only 151sq. in. of media.) The core is the most open I have ever seen yet. 1/4" hole perforated metal. Very nice. The shell is stronger than the Amsoil. Uses what appears to be urethane potting compound. Cell/synthetic blend media.

Amsoil: One good thing about it, their claim of cell/synthetic/glass mix media is true. Verified by microscopic examination. Unlike M1. I did not like that the core was not potted into the top cap(too short). It was completely loose with about 1/8" gap. Also didn't like that it also looks it would pose additional restriction. It is slotted perf metal and the slots only open about 1/32". Media area 151sq. in. and not spaced evenly. Uses plastisol potting compound.

Moral of the story, if you have a BMW don't waste your money on a K&N filter(it will actually flow less). For that matter if you have a 3/4-16 thread and same gasket size, consider the BMW if you want flow and quality. IMHO. And if you have a BMW don't use anything else. This baby rocks. And for only $4something with a BMWCCA discount.

I am impressed that Amsoil is truthful about their media composition. But still only flows a little bit more than the M1 though. I would pick them over M1 if you still don't believe everything on this site about flow, etc by Terry and Bob and want a high eff. filter. Quality a concern though.

Amsoil actually used to spec this SDF34 as a replacement to this BMW filter which is kind of scary. They now list a SDF57. I don't know what that is.

EDIT: P.S. Thanks to Pablo for supplying the Amsoil filter!

[ March 11, 2003, 03:53 PM: Message edited by: Jason Troxell ]

 

[Pablo]

Too cool.

I have often suspected that the Amsoil filter is not a great flowing filter - I used them on the 855, and got pretty good wear results, but still I have gone back to the Mann - because I swear the Mann filter allows less noise at cold flow....

Anyhow - I didn't even remember that Bimmers use 3/4-16 threads. I don't have my book so I can't remember the SDF-57 dimensions - but more importantly:

Who makes the filter for BMW? (Is it Mann?)

EDIT => THANKS!!!!!!!!!!!!!!!!

[ March 11, 2003, 04:17 PM: Message edited by: Pablo ]

 

[joee12]

Thanks for another great post Jason!!! -Joe

 

[Terry]

Jason, you are my hero, thanks for adding a few new pieces to the puzzle for filtration.

Terry

 

[Pablo]

Almost forgetted:

On the dual remote on the 245Ti when I'm not using two big FL-1A's (cheap!), I use two SDF-15's...and get the flow needed (just by the huge surface area) and better filtering...

 

[Terry]

Jason, Just a curious question; your oil pressure went up using the less restrictive filter ?

 

[jason07-1zzfe]

Pablo I'm not 100% sure but it sounds like it is the exact same thing as the MAHLE OC49 after reading this:
http://minimopar.net/oilfilterstudy-german.html

The reason his media area is higher was that I was calculating real media area and he is counting the potted stuff. Same # pleats and everything else sounds exactly the same.


Thanks Terry, I have a few more in the works. I hope to do at least a regular AC and their Ultraguard as well.

Yes only a few psi, but that was from M1 to BMW. Am I off my nut? I thought the sender was after the filter. More flow getting past filter at same rpm = more psi. FWIW, Canton meca makes high flow filters with NO bypass and they say to change out when the pressure drops a couple psi. I.e. it become loaded and restrictive.