i posted this on the org. but i think i will get more and better reply here

o.k here's what I have come up with as far as a by pass system coolant/oil.
coolant by pass filter system you are looking to get sand out of you coolant system. a grain of sand is about 100 micron in size (bad) I have made my own using a fuel filter which will take it down to 10 micron (about red blood cell/8 micron) I don't know what size the good stuff is in the motorcraft gold coolant is?

now here comes the difficult decision!! oil by pass. I was looking over the amsoil system. I think I read that they use a 1 micron filter (smaller then bacteria)
1 micron = .000039 of a inches.
I could not fine out what micron the motorcraft oil filter FL2016 is. but I crossed it over to a Napa 7312 and that is a 17 micron filter.
I know there are things in your oil that are good for the motor. but what size are they? how far should the oil be filtered. I know clean is good. but if you take it down so far that you are taking out the stuff that should be in there. what good/harm is that doing

 

I think I read somewhere that the OEM filter is 20 Micron. As far as bypass oil filters go, I would tell you to spend your money on something else. Beachbumcook has oil analysis' from before and after he installed his kit. There was no real change in the reports. Just my $0.02.

 

Things are not so simple as to just increase the filtration level with a finer mesh.

As you do so, the pressure across the media increases and also, the media plugs quicker.

So all things equal, a finer filter can mean:

a) excess pressure - in which case a check valve opens and oil is circulated unfiltered.

b) prematurely clogged filter.

Take a look here.

Continuous Filtration

http://www.che.ufl.edu/courses/ech42...F%20Theory.pdf


Notably, the add on filter kits are bypass filters --- not an in line filter.


Filtration at 20 micron do not capture much of the wear particles that tend to be much smaller.

See:

http://www.spectroinc.com/Collateral...20Brochure.pdf

for some pictures of what they look like.


However, just because a filter is rated at say, 20 microns, does not mean it cannot capture some particles well below 20 microns - e.g. particles as small as 10 microns can become lodged in a 20 micron filter through,

a) a smaller opening (20micron being an average size, some openings are larger some smaller).

b) physical lodging on impact with filter material


The question that all this comes back to is, what is the point of diminishing return?

In every engine (even a brand new one) it is normal to shed some metal.

It is also perfectly normal to have some contaminants "blow by" the rings.


Finally, no amount of filtration (unless you are getting real esoteric here) can address the issue of dilution of oil and the alteration of its chemistry by contaminant gases and metals, and simple oxidation of the oil over time.

 

do think a Napa 4006 fuel filter would be o.k (10 mic) to use in a coolant and a oil system
I have a case of them and the heads for free. I have zero$ into making the coolant filter system. which I know I have to filter.
but what about the oil. I think these filter are small enough that I can get both of the into the spot that ever body uses.
with the kicker being the heads I have are a 1-12 thread so once I run out the filter. or if they are too small and plug? I'll have to try and fine a bigger filter with that thread

 

There are a few things to watch for:

A) some fuel filters have a anti-water feature that shuts the filter off when it gets water in it.

Does that filter have that? Check first before you proceed.


B) otherwise, if the filter is used in bypass (and not flow through), it is much less critical.

I would say go for it subject to (A) checking out.