Grease, that article/speadsheet is great, kudos for getting it all together!!
It would be interesting to see the effect of the size, number, and pattern of the inside tube return holes added to the demonstrated flowrates of the given media. It would also be interesting to see the difference in flowrate of a given amount of media(EFA in the report) with more/shallower pleats compared with fewer/deeper pleats.
A while back I had cut open a couple of AC PF-52 filters from Kmart and Walmart.. They both had 244 sq in, but the Kmart/delphi version had 36 pleats 13/16 in. deep by 4 3/16 in. long, and the Walmart/champion version had 61 pleats 8/16 in. deep by 4 in. long..
The champion version was more uniform looking,with the typical champion layout for inside tube holes, the delphi version had larger inside tube holes, it would have been interesting to compare the performance of those 2 filters given that the media area was the same huh? (The ST-3980 equivalent for them had 206 sq in of media, the pureone pl-24011 had 236 sq in)
Didn't mean to run on like that, thanks again for putting all that filter info together.
Rando
[ February 07, 2004, 06:59 PM: Message edited by: ZR2RANDO ]