I gave up the system of allowing the oil to get dirty wear and foul
the engine then draining it in 1963. I started with the Frantz. When
Motor Guard came out in 1966 I started using them. I liked the design
better. I believe the Aero Frantz got FAA and PMA approval in about
1971. I have letters from a couple of users of the Aero Frantz. There
are a few still in use on small military aircraft. I ran onto a crop
duster outfit in Kansas that used them. They were designed to use 1
1/2 core toilet paper. When the paper companies changed to 1 5/8"
Frantz came out with their own elements.
Motor Guard went into the more lucrative industrial market. Motor
Guard beefed up their die cast aluminum housing and put an epoxy
coating on them. They are mostly used in electronics. They are used in
plasma cutting, plasma etching, air filters where clean dry air is a
must such as painting aircraft. Some are used for synthetic oil in
vacuum pumps. The Motor Guard has the advantage of being a compressing
type filter. I like them because they are very easy to service. I have
been lathe turning internal parts to fit the more common 1 5/8 core
tp. I take enough paper off to make the roll 4 1/4 diameter. The
company I work for furnishes me with tp called Mainstreet which is
just the right size. Scott 1000 sheet is very high quality but about
50 rounds too large. After 40 years you get to be an expert tp
squeezer. The FAA and PMA models are gone unless you can find a used
one that someone doesn't know what it is worth. The FAA and PMA model
had a clamp that bolted on instead of the automotive over center
clamp. Motor Guard never got into aircraft filters. It's a hassle with
all the red tape. Filters that clean oil down to well below one micron
have always been of interest to me. Oil doesn't wear out. It gets
dirty and you can burn it up. I keep it clean and don't run it too
hot. It is very hard to wear out equipment with clean lubricants.
Dirty oil generates good profits. Clean oil only generates long
equipment life. I was asked about installing a filter on a Spit Fire.
He said the FAA approval wasn't necessary. It's a company that
restores old aircraft. I think he mentioned a Rolls Royce engine. My
guess is he found an old Aero Frantz. He was looking for one. I think
the Frantz was his first choice. I like to use a sandwich adapter with
the Motor Guard. If the engine has a spin on filter the sandwich
adapter makes a nice installation. You install the adapter between the
block and the full flow filter. All of the oil goes thru the full flow
filter but some is diverted to the Motor Guard to be cleaned first. I
can get either the Flex-A-Lite or the Perm-Cool from Jegs.com high
performance parts. I prefer the Flexalite because they put a bypass
valve in the GM engine adapters. The Frantz, Motor Guard and most
other bypass filters have a 1/16" orifice so that the filter won't rob
too much oil from the system when teeing off at the sending unit or
gauge fitting and returning the clean oil to the sump. I don't know
anything about aircraft engines but a VW Beetle oil pump has plenty of
oil pump capacity to supply the engine the filter and still bypass oil
from the oil pump to the sump. I have two v twins that work very well
with the sandwich adapters. The adapters don't take oil pressure from
the engine.

Ralph

guynoir wrote in message link.net...
The submarines I was on all used synthetic oil, and had centrifugal
bypass oil purifiers. They never changed the oil. In fact, the reason
you use a bypass filter is so you don't have to change the oil, and
because the bypass filter also removes water.

Also on the submarine, the sailors discovered that toilet paper rolls
make very effective filters. If you exhale your reefer hit through the
edge of the roll, it filters out all the smoke, making it undetectable.

Street price for new Frantz filters looks like around $135 (on Ebay).
You can buy them new from the manufacturer:
http://www.wefilterit.com/

Dan Thomas wrote:
"Gilan" wrote in message link.net...

I used to install them on engines. I would love to know where you found
them and if you can get me any??? The Frantz is a great bypass oil cleaner.
Most people don't understand how a bypass oil cleaner works. Please let me
know about getting more Frantz cleaners
--
Have a good day and stay out of the trees!
See ya on Sport Aircraft group
http://groups.yahoo.com/group/Sport_Aircraft/

Flying Gators annual Fly-in
http://www.mitchellwing.com/flying_g...annual_fly.htm

Private Pilot in 10 days
http://www.perfectplanes.com


I had one on a Chev S10, and took it off when I sold the truck.
Still have it in my junk somewhere. The oil in that truck was always
clean; would darken a bit from heat, but no carbon in it.
The filter has a tiny orifice feeding it so that minimal oil
pressure is lost in bypassing the engine's oil system. It would NOT
work as an inline full-flow oil filter because of that restriction,
and because the toilet paper presents so much restriction by itself,
especially as it accumulates junk.
It's hard to find toilet paper that will fit it anymore. The
retail types of crapwrap are loosely wound and are on larger ID rolls
than formerly. They won't fit the canister and centre post properly.
Service-grade rolls are necessary, and they are available only in
cases of 48. Lots of filters, but at the same time you can save cash
on the stuff since a roll will last many times longer in the biffy and
costs only marginally more than the retail stuff. You want 500-sheet
singly-ply, and it has to be good quality paper.
I'd put the filter in my Jodel but I fly it so infrequently that
the oil doesn't have a chance to dirty up much between changes, and
the weight of the filter cuts into an already-small useful load.
The filters are still manufactured, I think. Maybe a Google search
might turn something up.

Dan

--
John Kimmel



In the desert
I saw a creature, naked, bestial,
Who, squatting upon the ground,
Held his heart in his hands,
And ate of it.
I said, "Is it good, friend?"
"It is bitter -- bitter", he answered,
"But I like it
Because it is bitter,
And because it is my heart."