Originally Posted By: zerosoma
Originally Posted By: Jim Allen
Cadchris brought this up on the oil filter board and I thought it was worthy of discussion here, namely the "Current Air Filter Study" he linked to there from GM Truck Central. While not as good as the Spicer study, it's methodology is pretty good because he did that test essentially the same way the filter mfrs do. The problem is that the results are not comparable to what would be obtained by testing using more accurate equipment using current ISO test standards. Accuracy is suspect but the results largely do reflect some of the differences you can see in the different types/brands of media. The advice not to "follow the flow" is good because that road usually takes you to a place of reduced efficiency.
Quote:
From Cadchris: As Ralphie from A Christmas Story would say: "Aw Fuuuudge".....and I thought I was posting some "Earth Shattering" information here on the forum!
I figured there were a lot of flaws in that study. Did you guys go to that forum and see that other Toyota Tundra Filter Study?
Toyota Tundra Oil Filter Study
In post#2, I mentioned the earlier Amsoil Filters having a 15 micron rating and now they are 20 micron. Does Amsoil have the same ISO 4548-12 Test for their new 20 micron oil filters?
I'm sure the earlier Amsoil Oil Filters are the ones to try and find from their dealer network if anyone still has them in stock since I guess they are more efficient than the new oil filters....right?
I think I remember some mention about the "Spicer Report". The link is now dead but I found the entire report posted again here on this site with graphs:
SPICER AIR FILTER REPORT/TEST
Maybe this should be made as a STICKY!
Here it the orig. info in the dead link recovered by an archive internet service called WAYBACK MACHINE that takes snapshots of old dead webpages and I use often:
Spicer Report Archived. Limited Data.
So I guess the Amsoil filter (TS123) tested was an older "Oiled Foam" filter. I wonder how their new EAO Air Filters would perform?
I know that major media mfgs. in the HVAC industry have emmerged with impressive technology in HEPA media's with very low pressure drops and static pressures so I'm sure that Amsoil's and any others have integrated those raw media's into their auto filter lines. Just a logical thought..........
After reading that older report, and reading this very funny thread who totally trashed the K&N Tech who joined their forum, I'm so upset with K&N that I'm getting them out of all my cars ASAP! It now makes sense that I've always have had high silicate values on my Oil Analysis! "Fudg'in" dirt passing through the K&N all these years on my Cadillac's.....wonderful, "Thanks K&N"!
K&N Corp. Tech Guy gets Trashed on this Forum
Having experience in the HVAC and Indoor Air Quality industry, I've always had a deep down feeling that a car's air intake should be treated similarly like high efficiency filtered air within a dwellings HVAC system to filter out mold spores ect., of course not at sub-micron levels for an engine, but the the thought had occurred more than once with me of how the K&N really performs.
So then.....would this be a more current and/or valid Air Filter Study??? Maybe it should be made as a STICKY.
Current Air Filter Study March 2012
Regards,
Chris
This whole post made zero sense to me. It's like a random collection of quotes but none of it connects.
I had to come back to this thread for the links I posted to the GM Truck Central Study, so I'm again going to post my original link with the active hyper-links since they could not be accessed by "zerosoma" and others as quoted by Jim Allen.
Here is that thread:
Original Post with links.
By the way, does anyone know off hand what years the GM Big Block Chevy TBI's used the larger air cleaner with a larger element?
I want to put the larger air cleaner on my 91 Cadillac Brougham SBC 305 TBI for more surface area of a larger air filter.
Regards,
Chris
