This is a list of factors expected to affect how fuel line magnets can
be used.

This info will change over time.....


1) what affects the fuel in the line is the flux density that you are
able to project into the actual fluid in the line...thus you need to
know the inside diameter (ID) of the fuel line and the wall thickness
of the line.

2) the speed of the gas flow thru the line likely partially determines
how much the magnetic flux affects the gas....thus the slower gas flow
to a carbed engine might need less flux applied. On the other hand...
the fact that with most FI systems the gas is constantly recirculated
past the magnets probably helps the magnetic effect.

3) with diesel fuel & fuel oil maybe 2Xs the flux might be needed to
have the same effects?

4) if possible...you should NOT use magnets on any line made of
steel...or covered with braided stainless...ferrous metals can disrupt
or deflect the flux.

5) the flux level falls off quickly the farther you measure it from a
magnets surface...so you want to keep the magnet snug against the
fuel line...also you can prevent chaffing of the line this way.

6) heat reduces the flux the magnet can project...so you'd want to
insulate the magnet using the adhesive foam/alum pipe insulation as
found in most hardware stores. It's expected that the actual
magnetic material will then stay near the temp of the fuel running
thru the line vs the higher engine bay temps.

7) ceramics are more susceptible to temporarily losing flux strength
due to heat and have less flux strength vs neos to start with...
about 1/8th? This does not mean that they are not effective as fuel
line magnets though.

8) for any particular magnetic material...ceramic or neo...the flux
level projected into the fuel depends on the VOLUME of magnetic
material. This page allows you to test out various sizes, shapes,
and types of magnetic materials in terms of expected flux levels at
various distances...with or without a backplate.

http://www.magnetsales.com/Design/Tools1.htm#units

9) the flux projected by the magnet is pretty much wasted IF it
doesn't go thru the fluid in the line....so a too large magnet MIGHT
be wasting your $$...when you buy a magnet...you are usually paying
for flux density.

So...I'm focusing on using 1/2" x 1/2" disc OR
1/2" cube neos...and using different numbers of them to vary the
total flux level....probably not the best flux bang for the buck???

Maybe 2" x 1/2" x 1/2" neos would do it?

10) the RS type ceramic magnets are apparently used a lot and so are
about the best deal in ceramics in a size that can be used on a fuel
line...these can be found for $.50 to $.60 each in grade 5.

11) with ceramics or neos...using a back plate increases the flux
directed towards the fuel...and reduces the stray flux on the side
opposite the fuel line. Usually 1/8" to 1/4" low carbon steel
(usually what is found in a hardware store, etc.) is best...generally
about the same size or slightly larger than the magnet's surface??

The idea is to use a flat piece of steel to reduce the amount
of flux getting thru the plate on the side opposite the magnet. Neos
will need a thicker plate.

You can test this by using the official DIY flux meter...a small
screwdriver.

I'm using silicone caulk to glue the ceramic magnets and backplates
together...with the expectation that they can be taken apart later
and reused...but have found that you'd want to paint the metal with a
gloss paint ONLY if you expect to get them apart later...even then this
isn't easy to do.

(I use a thin bladed paring knife...I keep my hand out of the way!)

This WON'T work with neos. They hold so well...you'd find it very
difficult to overcome both the adhesive and the flux strength when
trying to remove them...espec with the larger ones. I intend to
only use a bead of silicone along the sides to hold them in place...
and maybe this isn't really needed. It's also a good idea not to
place them on soft paint.

12) any magnets of the same size can be stacked for greater
flux strength...and can still be used with a backplate.

13) .....what PROBABLY matters when applying flux to the fuel line is the
TOTAL flux level applied. This is basically the flux level projected
by the magnet used...

http://www.magnetsales.com/Design/Tools1.htm#units

....Xs the overall length of all the magnets used on the line.

-------------------------------------


* a typical 1/4" ID rubber fuel line has a 1/8" thick wall and the OD
is about 1/2"...so the fuel is at least 1/8" from the magnet and is as
far as 3/8" from the magnet...so the AVG flux at these two distances
of 1/8" and 3/8" is used to determine the overall flux exposure.

Some lines will be 5/16" ID...and obviously larger engines will use
a greater ID.


- RS type grade 5 Ceramic Block 1.87 x 0.87 x 0.390 Inches

FLUX DENSITIES for (1) 1 7/8" X 7/8 " X 3/8" ceramic magnet with
backing plate...tested as grade 5

1/8" = 885 3/8" = 524 AVG = 705

Using (5) of these gives a total flux exposure length of 9.35" ...

9.35 x 705 = 6592 total flux exposure


FLUX DENSITIES for (1) 1/2" X 1/2 " disc neo magnet with backing
plate...tested as neo 35

1/8" = 3253 3/8" = 934 AVG = 2094

Using (7) of these gives a total flux exposure length of 3.5" ...

3.5 x 2094 = 7329 total flux exposure


FLUX DENSITIES for (1) 2" X 1" X 1/2" neo magnet with backing
plate...tested as neo 35 (actually a neo 40)

1/8" = 4007 3/8" = 2522 AVG = 3265

Using (1) of these gives a total flux exposure length of 2" ...

2 x 3265 = 6530 total flux exposure


FLUX DENSITIES for (1) 2" X 1/2" X 1/2" neo magnet with backing
plate...tested as neo 35 (actually a neo 40)

1/8" = 3709 3/8" = 1725 AVG = 2717

Using (2) of these gives a total flux exposure length of 4" ...

4 x 2717 = 10868 total flux exposure

** 60-70% greater total flux than the other examples **




So....MAYBE...(7) of the 1/2" x 1/2" disc neos...(1) of the 2" x 1"
x 1/2" neo blocks...(2) of the 2" x 1/2" x 1/2" neo blocks...are
equivalent (or in the last example...greater) in their effects on
the fuel as (5) of the RS ceramics....ALL with backplates.


*** You could use the above method to determine (roughly) the amount
of flux you are exposing the fuel to....with any magnets you are
currently using....or any magnets you are thinking of using. ***


The info above is based on several assumptions (hypotheses or
hypothesi or a herd of hypotheses?)...

* that the overall flux exposure of the fuel determines the resulting
mpg gains...if any

* the overall flux exposure can be calculated by multiplying the
inches of flux the fuel travels thru Xs the avg flux density for each
magnet.

* that there is no difference in effects between a highly
concentrated flux in a limited area vs a lower less concentrated flux
over a larger area.

* that there is no difference if the fuel leaves and re-enters the flux
fields vs not doing so...i.e., using (7) neo discs vs (1) neo block.


>> So it appears, at least, that ceramics will do the job...IF...you
have the room to mount them. They are a cost effective magnet to
use....but the neos are not that much more costly in some cases.

The ceramics are less likely to permanently lose a % of magnetism...
but will temporarily lose more % due to heat (than neos).

Seems that in both ceramics and neos that certain sizes are in greater
demand industrially, and so are the best bargains in flux strength.

Some online sites will have only certain sizes...the prices can vary
a little or a lot between sites...so it's best to look around before
you buy. Shipping can be a fair part of the overall cost.

- cost to generate around 6500 (or more) "total flux exposure"
including backplates:

(5) RS type ceramics on backplates ~ $4.00?

(1) 2" x 1" x 1/2" neo 40 block on backplate ~ $5.50 to $11.00?

(7) 1/2" x 1/2" neo 40 discs on backplates ~ $8.00 to $14.00?

(2) 2" x 1/2" x 1/2" neo 40 blocks on backplates ~ $5.50 to $22.00?

** 60% higher total flux **

Shipping not included....



* this is what I think I know at this point...some of it might turn
out to be off to some degree...

* most of the above info likely applies to water conditioning also...
except that the size of the lines involved for water are usually
greater...requiring a higher flux strength in most cases.