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Old 07-29-2020, 01:49 PM   #21
richbob
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Default Re: Short Oil filter

micron plus or minus is better than nothing.
but the bypass is maybe an issue. pressure wise, how thick is your oil at periods in time
no fucking idea.
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Old 07-29-2020, 02:29 PM   #22
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Default Re: Short Oil filter

Fck , i will look for an alternative ...there must be one .
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Old 07-29-2020, 03:21 PM   #23
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Default Re: Short Oil filter

Mann mw 77 is the closest i found , 10 psi pressure valve and a height of 59 mm, but unf 3/4 connection.
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Old 07-29-2020, 03:29 PM   #24
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Fuck now I have to go 16mm to 3/4
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Old 07-29-2020, 03:34 PM   #25
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Default Re: Short Oil filter

Yep same here, i will have to do some mods as well ...again.
Red an article about the filtration rating and i agree the pressure valve is way more important.
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Old 07-29-2020, 06:13 PM   #26
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Default Re: Short Oil filter

Problem with a small micron number is you're in by-pass sending unfiltered oil back to the tank and then back into the engine more often and longer.
richbob your one post said under 165mm tall that's like 6 inches and some. The WIX 57013, Napa 7013, or Fram PH6019 and likely the rest on this cross are only 2 1/2 inches tall and 16mm x 1.5. Direct replacements.
Cross and lots of Ducati numbers to check out for availability.
https://www.oilfilter-crossreference...IDSON/63782-80
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Old 07-29-2020, 11:43 PM   #27
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Default Re: Short Oil filter

Joe i am truly not doubting your wisdom , but what about the parts that slip through the “rough” filter , they stay present in the oil as well.
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Old 07-30-2020, 04:03 AM   #28
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Default Re: Short Oil filter

Dutch
that 2nd filter mann mw77 is motorcycle specific (vespa and shit)
so doesn't really help me in the autoparts store so im sticking with the harley one for now.
looks like car filters have a higher bypass?
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Old 07-30-2020, 10:26 AM   #29
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Default Re: Short Oil filter

Quote:
Originally Posted by Dutch Dennoz View Post
Joe i am truly not doubting your wisdom , but what about the parts that slip through the ďroughĒ filter , they stay present in the oil as well.
Down the rabbit hole we go. Some were in the internet world the video I was shown as training exists, I as of yet haven't found it. I would suggest a extensive search and reading on the subject and then I will answer any questions I can. This is a good start.
https://www.machinerylubrication.com...ose-oil-filter
Now to answer your question about slipping through. The thing is a micron rating is not a only does that size. You would think that it will filter any particles that size or larger, that is not exactly the case. The take away is the filter isn't filtering perfect spherical particles. Those particles are many different shapes. Think balls, eggs, spears, worms, squares, virtually any shape. What is important is the angle at which the particle meets the filter media. If say we have 20 micron filter, and a worm particle makes contact at its small end even though it is a 40 micron it can pass though. The other way around a 10 micron that strikes the media on its long dimension will be trapped.
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Old 07-30-2020, 10:37 AM   #30
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Yea fuck
Bobs the oil guy
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Old 07-30-2020, 11:20 AM   #31
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Default Re: Short Oil filter

I contacted our company lubricant supplier about the second filter , their specs with all the info from above here and the dimensions i want to stick to i think its a go for me. Mann replied the rating is 15micron at 50% and 35 micron at 95 %.
Lets hope all particles behave and line up in good order.
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Old 07-30-2020, 11:55 AM   #32
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Default Re: Short Oil filter

Now think about the bypass valve pressure. Is it the same 7-9 psi? Cause there is a caveat, there are different ways a filter can be used. Pressure feed, by-pass, return,and combinations. The by-pass valve is not opening at the same pressure as the oil pump output, it's a differential and this is different depending on the way the filter is in system. On a Harley the oil is a return to tank and has little resistance after the filter,so it opens close to the actual pump pressure. In a pressure feed it opens at the point the after filter pressure drops below its setting. Which will be at higher overall pressures. So what happens if it's to high. Oil by-passes in the pump and builds up in the cam case till it starts to blow out the vent. If the pump is to tight to by-pass the gears it blows the oil pump gasket. I have seen it happen were a aluminum pump actually cracked.
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Old 07-30-2020, 12:39 PM   #33
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Default Re: Short Oil filter

This one is 10 psi , does that still differ to much?
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Old 07-30-2020, 01:16 PM   #34
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Default Re: Short Oil filter

Not likely.
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Old 07-30-2020, 01:35 PM   #35
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Default Re: Short Oil filter

Okay , good info ,thanks a lot, down side is you got me reading about filters for 2 days now.
I am still wondering how a fabricator makes up Which ratio to use , Unless you test a bike for ages its hard to figure out what kind of particles get involved. So the only science involved is to make sure you use an universal filter, i red about some sportster guys who where eager to get as low as 5 mu and in the mcs link magnum pete posted i saw arlen ness bragging a about a 35 mu filter.
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