OK, this is what I've been given from Amsoil TechService in regards to flow of these filters. I guess I'll just give you guys the data and we'll try to desipher it best we can here. This is what I've condensed from my discussions with Amsoil. I think we'll have to find someone to do testing for us head-to-head with a conventional BHAF. -Chuck
"The main advantage AMSOIL is promoting with the new Ea air filters is that they are more efficient, with some advantages in air flow over cellulose filters and, in fact, over TS as well. If we went head to head with K&N the Ea air filter would most likely not flow quite as well, but better than cellulose filters. To better serve our dealers and customers, AMSOIL partnered with worldwide leaders in filtration to develop the EaA nanofiber filter (read: Donaldson). The EaA filter offers higher efficiency and better airflow than foam, oil wetted gauze, and conventional cellulose filters. The EaA filters offer less restriction than the foam filters, at 200 scfm the restriction is 0. 8 inches of water, while the foam filter is 1. 1 inches of water, the oil wetted gauze filter is 0. 6 inches of water at the same volume of air flow. Using SAE J726 (ISO5011) test protocol and employing a mixture of A2 Fine Test Dust and carbon black to simulate on highway driving conditions, and cumulative efficiency is 99. 5%. Oil wetted gauze filters, when tested with course test dust, have an efficiency of 99. 1% while the foam filter was 99. 5%. This testing was conducted at Southwest Research Institute. The average pressure differential fro the EaAU filters (read: the whole product line average) was 4. 7 inches of water at 450 scfm. The Fleetguard AH19037 (read: BHAF) was not tested. The Ea air filter line will withstand water per normal operating conditions but are not meant to be submerged or washed. Due to the fact the AMSOIL EaAU filter is high efficiency (removes more dirt), it will have a larger pressure differential than wetted gauze versions.
Regards,
Richard Holappa, Jr.
Technical Product Manager: Filtration
AMSOIL INC.