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Old 06-02-2015, 11:02 AM   #1
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Racor 10 vs 30

Gents

It looks like high bio-diesel content has a very bad relationship with the 2 or 30 microns Racor filter element. I am going now for the 10 microns

What you all think?

Thank you
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Old 06-02-2015, 11:07 AM   #2
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Wheeewie!!!! I do believe there was a thread on this with extensive resources footnoted. One particular article was excellent. I have Cummins and use 10 micron on the primary Racor and then the Fleetguard Cumins spec on engine filter. That is what is recommeded from the Cummins camp!
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Old 06-02-2015, 11:14 AM   #3
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Lugger Bob told us 30, so we run 30.
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Old 06-02-2015, 11:22 AM   #4
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This about all you need to know....and then some!!!
What micron fuel filters do you use?

PS...the search feature provided this
PSS....don't miss Tom's links on p.3 if you really want to get into theory
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Old 06-02-2015, 11:51 AM   #5
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Every one has an opinion, but go with what your engine manufacturer recommends. Generally they call for less filtration on the primary, moving to more (finer) filtration closer to the engine. For example, Cummins recommendation for my 6BTA 5.9 JWAC engine calls for a 30 micron primary (Racor), and a 10 micron FleetGuard on-engine secondary. Good enough for me.

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Old 06-02-2015, 12:35 PM   #6
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I use a 2 micron on my Rocna, oh dam now I did it!
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Old 06-02-2015, 12:40 PM   #7
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I use a 2 micron on my Rocna, oh dam now I did it!
You got the filter right but the wrong anchor.
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Old 06-02-2015, 12:43 PM   #8
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Gents

It looks like high bio-diesel content has a very bad relationship with the 2 or 30 microns Racor filter element. I am going now for the 10 microns
Specifically, what is bad about the 2 and 30 micron elements that you expect 10 micron to solve?

I am curious about this.
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Old 06-02-2015, 01:04 PM   #9
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Started out w two but decided that was too fine. I use 10 now.

jleonard,
I thought 2 may clog the filter prematurely and w stuff not an issue. After all the idea is to stop stuff that could be a problem so the largest "mesh" that will stop the bad stuff should be best. Perhaps 100 to 200 micron would cover us ???
JL re your question I don't understand why the 30 micron is in the question.
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Old 06-02-2015, 02:12 PM   #10
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Started out w two but decided that was too fine. I use 10 now.

jleonard,
I thought 2 may clog the filter prematurely and w stuff not an issue. After all the idea is to stop stuff that could be a problem so the largest "mesh" that will stop the bad stuff should be best. Perhaps 100 to 200 micron would cover us ???
JL re your question I don't understand why the 30 micron is in the question.
Read the original post. It said 2 and 30 micron are a problem.
From MY limited knowledge of biodiesel in trucks, the first few tanksful clog filters badly. So yes 2 would likely give problems, but I want to know why the poster is choosing 10 over 30 that's all.
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Old 06-02-2015, 02:19 PM   #11
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Agree with using what the engine manufacturer tells you to use. Also, like others, mystified by the OP.
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Old 06-02-2015, 05:54 PM   #12
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Like Jay L., my limited exposure to bio diesel suggests some differences in filtration.

The beginning use of it does tend to plug filters because of it qualities in cleaning systems and in cooler climes it thickens a bit...and there are several other issues...but why certain micron ratings are avoided long term....???
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Old 06-02-2015, 06:17 PM   #13
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If you are going to start using biodiesel there are two things you might consider. #1 put what is known as a high capacity spin on mud filter with vacuum gauge and closed loop out board priming bulb fuel pump in the fuel line before your first filter and carry a half dozen spin on filters. This is a technique fishing boats with dirty old tanks that get stirred up in bad weather use. #2 your second option carry a lot of spare filter elements for your present filter. The problem with #2 is that you may not get warning before filter gets overloaded and most likely the capacity of your present filter is not near the spin on mud filter's capacity.
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Old 06-02-2015, 09:06 PM   #14
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30 micron in Racors X2 with changeover valve as primary then 15mic. spin on high cap then on to the two on-engine filters whatever they are (120 Ford/Saber).

Change Racors at vacuum indication and spin on at oil change and on-engine at 300 hours/ yearly.

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Old 06-03-2015, 07:52 AM   #15
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It looks like high bio-diesel content has a very bad relationship with the 2 or 30 microns Racor filter element. I am going now for the 10 microns

What you all think?

What is the nature of the "very bad relationship" ?

Our engine manufacturer (Cummins) recommends 30μ for primary, and I understand the Fleetguard secondaries are 10μ... so that's what we use.

Don't know whether that would change for bio, but would assume Cummins would be best to answer that question (in our case), should it arise.

I think my point is that the "best" filtration is perhaps engine-specific -- i.e., including for specific variants (N, T, TA, etc.), not just brand-specific, and very likely not generic -- in nature, perhaps best answered directly by your engine manufacturer.

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Old 06-03-2015, 08:03 AM   #16
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There's also the standard recommendations the for other "special" considerations...

Bio fuel may get different recommendations so make dang sure the big picture is presented, especially if you use multiple fuel types.
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Old 06-03-2015, 12:11 PM   #17
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What is the nature of the "very bad relationship" ?
Until we know this our replies are pretty meaningless.
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Old 06-05-2015, 12:55 AM   #18
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Don't use Bio Diesel. It leaves nasty, gooey, waxy residue in your tank. NO micron of any size will help biodiesel. If I had a stove at home, furnace in my cellar or a generator at home I would use biodiesel. But since my life (and that of my guests) depend upon a good running engine in a floating environment I skip the thought of trying to save a few bucks with biodiesel. It just ain't worth it.
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Old 06-05-2015, 09:16 AM   #19
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He may not have a choice with the biodiesel. Brazil last year raised their mandatory blend in diesel to 7%.
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Old 06-05-2015, 09:52 AM   #20
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@ Portuguese: If I may be so bold as to hijack the thread for a bit... You have a VERY interesting hull. Double chine and nice fairing. Who built her? Quite impressed with the design. Notice the rolling chocks. Were those put on as an afterthought to help with the rolling? or was it a planned design? Who was the designer?
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