OEM or Magfine filter?

coomo · Dec 8, 2018

guys.Have just fitted anti wet sump valve from Holland Norton works, for 1970 central oil tank roadster.They recommend fitting OEM later oil filter.Have already purchased Magnafilter.Should I go for OEM Norton filter, or will Magna do the jobs efficently?

kommando · Dec 8, 2018

The Magnafine picks up all the ferrous detritus using magnets so regardless of size which is good, the filtering for the non ferrous is undefined so is it as good as the typical 30 micron filter or worse. I would fit both if I could not find out the efficiency of the Magnafine second filter.

arch · Dec 8, 2018

The Magnefine filters is to be designed for transmissions and power steering systems.

I wonder if it’s seemingly small filter size would rapidly clog when used with an engine.

coomo · Dec 9, 2018

kommando said:
The Magnafine picks up all the ferrous detritus using magnets so regardless of size which is good, the filtering for the non ferrous is undefined so is it as good as the typical 30 micron filter or worse. I would fit both if I could not find out the efficiency of the Magnafine second filter.

"
The MAGNEFINE 3/8” filter extends the filtration spectrum to provide dual filtration that is
designed to be completely effective in removing damaging ferrous metal particles from
automatic transmissions and power steering systems.

When the fluid passes within the effective range (5mm) of the powerful magnet, the
MAGNEFINE filter quickly attracts all the hard damaging ferrous particles, even down to an
incredible sub-micron level stopping the "chain reaction of wear".

(University test show removal of harmful ferrous metal particles to 99.9974%) The secondary
filtration media, removes remaining non-ferrous materials (i.e. copper, aluminum, dirt, clutch
material)

The worldwide patented MAGNEFINE dual filtration filter is the only effective form of filtration
that can provide dynamic small particle extraction while maintaining full line flow capabilities
for automatic transmissions and power steering systems."

Seems pretty effective to me!

kommando · Dec 9, 2018

coomo said:
"
The MAGNEFINE 3/8” filter extends the filtration spectrum to provide dual filtration that is
designed to be completely effective in removing damaging ferrous metal particles from
automatic transmissions and power steering systems.

When the fluid passes within the effective range (5mm) of the powerful magnet, the
MAGNEFINE filter quickly attracts all the hard damaging ferrous particles, even down to an
incredible sub-micron level stopping the "chain reaction of wear".

(University test show removal of harmful ferrous metal particles to 99.9974%) The secondary
filtration media, removes remaining non-ferrous materials (i.e. copper, aluminum, dirt, clutch
material)

The worldwide patented MAGNEFINE dual filtration filter is the only effective form of filtration
that can provide dynamic small particle extraction while maintaining full line flow capabilities
for automatic transmissions and power steering systems."

Seems pretty effective to me!

You need to reread my post, I never doubted the effectiveness of the ferrous filtration and this gives a figure for this feature which confirms, but the statement for the non ferrous ( Highlighted in bold ) it is extremely vague and tells you nothing, could just be a tea strainer for all the info it gives. That with coupled with the small capacity pointed out by Arch relegate it to the worth a try under test conditions but best to fit a normal Norton filter.

Oldporridge · Dec 9, 2018

I just use the normal Norton filtering arrangement, but tie-strap a strong flat magnet that came out of an old PC's hard drive to the filter cannister. Simple and cheap - like me really?

Fast Eddie · Dec 9, 2018

I use a Magnefine filter, but it doesn’t look like yours!

Jim Comstock recommended them, so I thought “that’s good enough for me” and I’ve had no reason to question or doubt it’s effectivness.

I had recently thought about using both the magnefine and the stock set up. With the stock set up plumbed in before the magnefine it would leave the magnefine to only ‘concentrate’ on the fine stuff and would avoid the clogging fear raised by arch.

The other advantage of the stock set up is that it adds capacity, and a large tin filter cartridge, both being aspects that aid oil cooling somewhat.

So, overal, I think that my conclusion is that when choosing between the two options, the best choice is both !

Kvinnhering · Dec 9, 2018

Sorry if I'm bored by mentioning how I've solved this. The simplest is often the best, just slipping a magent inside the standard filter housing. Yes, there is room for this and does not disturb the oil flow. I have used this for many years without side effects. Use it over and over again.

Tornado · Dec 9, 2018

These magnet setup are neat. But I can't help wonder why bother? If the ferrous particles are big enough to be trapped via the filter anyway, like all the non-ferrous particles, it would seem redundant to have a magnet.
If the point is to trap ferrous bits too small to be filter trapped, then you still need to worry about the too small non-ferrous bits as well.

Only benefit I can see is the potential to inform of ferrous component 'failures'. But again you still don't know about non-ferrous failures.

Fast Eddie · Dec 9, 2018

I can’t recall the details and certainly can’t be bothered to research it all again. But I recall Jim Comstock saying how the Magnefine was a better filter than then the stock element AND has the magnetic component.

But, I’m not here to persuade you. If you don’t want one... don’t fit one. Quite simple really!

elefantrider · Dec 10, 2018

Either is fine but both together are unnecessary.
Norton engines seem to deposit a lot of metal powder in oil. I have witnessed this because for some time, I had been siphoning oil out of my bikes' oil tanks when not using them. The powder sediment which settles to the bottom of the plastic container is shocking.
On my Commando, I now use the plastic unscrewable Magnafine version which has been discontinued.

Fast Eddie · Dec 10, 2018

If you see such ‘shocking’ sediment and have a Magnefine filter, is this not telling us that the Magnefine filter is not doing a good job?

kommando · Dec 10, 2018

I suspect the powder is not magnetic but carbon/combustion deposits from piston blow by, next time try putting a magnet in the powder and see how much it lifts.

elefantrider · Dec 10, 2018

Fast Eddie said:
If you see such ‘shocking’ sediment and have a Magnefine filter, is this not telling us that the Magnefine filter is not doing a good job?

That was without any filter or magnet. On a P11, which now has a high strength magnet in the drain plug and gets frequent oil changes because it has very little space for a filter.

kommando said:
I suspect the powder is not magnetic but carbon/combustion deposits from piston blow by, next time try putting a magnet in the powder and see how much it lifts.

Could be also but I seem to remember the particles looking reflective in the sun a couple drains after the rebuild.

kommando · Dec 10, 2018

When I have run with magnets either in the sump on Unit Singles where I can sit it below a screen, or where one is already fitted eg MK2A 850 then they do fur up but the fur seems to be from the cast iron rings bedding in and not reflective.

olympus · Dec 11, 2018

For my Explorer i purchased a hi power ring magnet and attached it to the back plate of the filter..

xbacksideslider · Dec 11, 2018

Why not? I can find a magnet; cost is minimal, gets what the filter, for whatever reason, might miss. In a filter that has a by-pass valve it certainly would have functional value. The fact that it fits inside the filter and all the oil has to get past that magnet on every circuit looks like a winner to me.

elefantrider · Nov 14, 2019

Anyone else with a Magnafine filter plumbed into the return side , noticing excess oil in the sump?
I am questioning if the pump is able to keep up with the backpressure of this filter.

How much oil is normal to have in the sump after shut down?

Fanfan26 · Nov 14, 2019

About a 0.066 gallon US.or a 1/4 of a litre.

o0norton0o · Nov 14, 2019

I have a '70 with the central oil tank and have added the Magnafine filter to my return line. I don't worry about sumping because I have 2 crankcase reed breathers. Whatever oil is in there is quickly pumped out once I start the bike. It certainly can't hurt to have a big spray of oil distributed over the engine's "guts" on start up...

The test of the magnafine filter for me was to start the bike and pull the oil cap off to see if the oil return flow was spurting out of the straw in the tank the same as it did before I added the magnafine filter. From what I see, there's no difference in the flow after I added the magnafine filter. If the extra volume of oil in the filter now flows backward into the crankcase when the engine stops, I wouldn't see that as a problem.

If you are worried about oiling, install an oil pressure gauge.

OEM or Magfine filter?

coomo

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