1) This is the message I put to our group: ----- Original Message ----- From: GARY RITZMAN<mailto:ritzmans@msn.com> To: Trawlers-samurai<mailto:trawlers-and-trawlering@lists.samurai.com> Cc: Trainman484848@aol.com<mailto:Trainman484848@aol.com> Sent: Friday, June 30, 2006 5:19 PM Subject: Racors 2 micron vs 10 micron SNIP: If your going to tell me I'm wrong then back it up with rational thought and logic and maybe I will learn something. Brian Palmetto FL Brian and many others: Good point. So how do we know the micron level of CAV secondary filters on a Lehman 135SP? I have seen a lot of inference that it might be 2 micron but how do we know that? If it is not 2 micron then the engine does not require 2 micron anywhere? <<<Gary Ritzman>>> M/V Dharma Albin 40 Mercer Island WA 2) The only answer I have seen is from Philip Odom: Date: Sun, 2 Jul 2006 08:26:56 -0400 From: "Philip Odom" <philodom@gmail.com<http://by106fd.bay106.hotmail.msn.com/cgi-bin/compose?cur mbox=00000000-0000-0000-0000-000000000001&a=b6132ddb2f34fb28c989ffb063f51c1b0 dc3ffbb624231d46043ba0b58e1c4d1&mailto=1&to=philodom@gmail.com&msg=07D6CB04-6 7DE-4ECF-B234-FE32E78E6009&start=0&len=50128&src=&type=x>> Subject: T&T: Racors 2 micron vs 10 micron (who knows?) I think I posted this years ago when this type of subject came up. I questioned the micron rating of the CAV filters that most of us use and Wix says their filter is 10 micron (part # 33166) and Lucas/Delphi claims theirs (part # 7111-296) is 5-7 micron. Wix techs dispute Lucas... Probably Racor would have their own spin on the subject.. Below are the emails I received FYI. Good luck, Phil (Contact From WIXFILTERS) >Our 33166 part number is a direct cross reference to the Lucas 7111-296 > part number. This is the same part number used by C.A.V. who invented this > type of filter. Their filter contains media that is rated at 10 micron > like ours. It does not have 2 micron media. A particle that is 1 > micrometer (micron) in diameter is .000039" across. The average human hair > has a diameter of 70 microns and the human eye can not see anything under > 40 microns without magnification. The difference between 2 and 10 microns > is measurable in the lab but is real life it makes very little, if any. > performance difference. > > Thank you for your inquiry. > > Chris Greeson > Technical Service Representative (Contact from Lucas/Delphi) > The Delphi HDF296 has a micron rating of between 5-7 micron (average > contaminant size in testing is 6.9 micron). Its average retention is not > less than 85% and is normally around 95%. The rolled paper-type design of > the filter was pioneered by Delphi, and it still remains the benchmark for > this kind of filter. > > I hope that this answers your question, and if you have any further queries, > please do not hesitate to contact me. > > Kind regards > > Ian Girle > Product Manager > Filtration 3) If CAV secondaries are 10 micron then I have to suspect that the good people arguing in favor of 2 micron primaries must wear belts and suspenders-perhaps two of each? <<<Gary Ritzman>>> M/V Dharma Albin 40 Mercer Island WA PS Happy Canada Day and Happy Fourth of July