• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Ss Oil Filter For 449/511 Models (info)

Tinken

Tinken

Husqvarna
Pro Class
I have been testing a compatible stainless steel oil filter for the 449/511 platform. It is smaller in diameter than the stock paper element so there is a little less filter area, but oil will flow around the outside much better to allow for more contact to the mesh and produce higher flow rates. I have been informed that this oil filter will outflow the Hi-Flow fiber oil filters seven to one. On this oil filter, a one inch square of the mesh media will flow 1.9 gallons of cold 90 weight gear oil per minute at only 1 psi pump pressure @68°F.

Scott's sells a stainless oil filter for 69.95, but I have been offered this one for as little as $23.







Edit: The purpose of this study is not to convince you to use a stainless steel reusable oil filter. I am not a retailer, nor do I have any invested interest in being one. I am merely trying to find an affordable Ss filter available for 449/511 owners. At the end of my study, I will post where to purchase the oil filters and what is involved in installing one. :)

KnP.jpg

Ss449_511filter.jpg


Conclusion here: http://www.cafehusky.com/threads/oil-filters-for-the-449-511s.29284/
 
How much shit will it catch compared to paper filter? And being SS I presume you just clean it and put back?
 
HuskyOilFilterHair.jpg


Paper/fiber and mesh filters take a fundamentally different approach to filtering. Mesh filters filter down to a certain size, and for practical purposes, no smaller than that. They do, however, only require a single pass to filter to that level. They work by simply having a very strictly controlled mesh size, through which a spherical object larger than that size cannot pass. They are rated in "absolute" terms, as with this filter (35μm "Absolute"). This rating tells you that nothing larger than 35μm (35 microns) will pass through it. (1 micron, or micrometer more correctly, is 1/1,000,000 of a meter, or 0.001 mm, or 0.000039")

Mesh filters are able to achieve this level of filtration with remarkably low resistance to fluid flow as well, which in the case of this filter means that oil will flow freely at all temperatures such as cold starts, and there will be no appreciable pressure loss across the filter.

"Paper" filters are different. They can stop even finer debris than mesh filters, but they also allow some larger debris to pass. They filter somewhat the same way a thick shrub catches objects thrown into it. Most tennis balls get stuck, but not all. An occasional golf ball gets caught, but an occasional soccer ball passes through to balance that out.

The random arrangement and density of the fibers in the element create odd and irregular gaps through which debris can pass. This creates little crotches of sorts that enable the filter to catch extremely small debris, but also creates gaps that allow it to pass ridiculously large material at other times. The paper element media is also three dimensional to a degree, where as mesh is essentially two dimensional; if something passes through one opening in the mesh, it's through, which isn't necessarily the case with fiber media.

Fiber, or paper, filters can stop debris as fine as 20 microns, or even less. But, they won't stop it all on the first pass. Worse yet, they won't stop all of the debris even as large as 90 microns or more on the first pass, and some particles occasionally come free of the filter to re-enter the oil stream. They are usually considered multi-pass filters, which carries the expectation that the same debris will pass through the system multiple times before being intercepted. They will be given "Beta" ratings like "80/25", which tells you that it will stop 80% of all 25 micron particles on the first pass. However, they will rarely publish the fact that they may very well also test at 85/35 or 85/40, and certainly will not mention that they tested at only 95/60 (95% of 60 micron debris).

Additionally, paper filters resist oil flow, particularly when cold, a great deal more than does mesh, and cold starts often cause a paper filter to bypass (bypass on the 449 is after the filter so in this event a cold start will tend to bottleneck or clog). In this filter, a one inch square of the mesh media they use will flow 1.9 gallons of cold 90 weight gear oil per minute at only 1 psi pump pressure (68 degrees F). For example, a filter with similar size to this one, which contains 15 sq/in of mesh, means that the media itself has the ability to flow over 28 GPM of cold 90 weight oil. That figure is also far beyond the delivery capabilities of the engine oil pump in any case. That basically means that unless you run half a shop rag through your engine, this filter will never bottleneck or clog under any conceivable circumstance, and will filter at full capacity regardless of temperature, even at 600°F. This is often not the case with "paper" filters, which commonly bottleneck or drop the flow way down during the warm-up operation.

So, it isn't a black and white, indisputable, one's better than the other kind of choice, but in my opinion, the 35 micron "absolute" stainless mesh is the way to go.

For more information on stainless steel filters, please visit K&P engineering:
http://www.kandpengineering.com/faq.shtml
http://www.kandpengineering.com/cleaning.shtml

How does this type of filtration compare to paper oil filters?

We use ASTMF316 testing procedures which eliminate many of the user variables found in the SAE procedures. Basically, the filter media is pressurized from one side, and when the media starts passing particles, that is the micron rating. We sent filter media from several common brands of paper filters to the lab to be run through the ASTM test. We sent the media to the lab with no names, just numbers for identification so they wouldn't have any idea what brand filter they were testing. The results for the paper filters ranged from 48 microns for the best filter to over 300 microns for the worst filter. Our tests were right in line with other testing results we have researched that have paper media filters passing particles anywhere between 50 and 90 microns. What does this mean? Paper filters are rated on averages, percentages of efficiency (also known as beta ratios) and multiple passes, so a 10 micron rated paper filter (as advertised on the packaging) may be letting particles 50 microns and larger through. The medical grade stainless steel cloth that we use is consistent across the entire media surface and is rated at 35 microns, meaning nothing larger than 35 microns should pass through the material. The bottom line is we meet or exceed the filtration performance of OEM filters, eliminating any warranty issues. - K&P
Click to expand...

http://www.cafehusky.com/threads/hairy-oil-filter-what-is-this-stuff.25746/
 
It makes good sense, which also explains the extra screen filters on our 449/511 engines. There must be quite a bit of bypass flow before the oil comes up to temp. Have you noticed any difference in the type or amount of junk the screens are catching?
 
Huskynoobee said:
It makes good sense, which also explains the extra screen filters on our 449/511 engines. There must be quite a bit of bypass flow before the oil comes up to temp. Have you noticed any difference in the type or amount of junk the screens are catching?
Click to expand...
Excellent question.

On the 449/511s, the bypass is after the filter. So instead of getting bypassed, the thicker oil bottlenecks at the filter. This partially explains why there is a noticable hp difference on the 449/511 when thinner cold weight oil is used.

Most of the debris I see is on the magnetic plug or on the first stainless filter. This doesn't mean that the filter isn't catching anything. Even the best human sight cannot see smaller than 45 microns, this explains why when you remove an oil filter, they generally look clean. Also, I use a very large neodyeum magnet on the back of my stainless steel oil filters which helps to keep them clean.

Even more interesting is that the particles which actually do harm to your engine are called clearence sized particles or csp's. These particles on the 449 are under 10 microns (0.5 to 10uM). Neither filter media type can trap particles of these sizes. So choosing a SS mesh filter is more about maintaining constant flow or lubrication. In order to filter out these particles, we change our oil often, preferably to synthetic because it contains less csp's from the start.
 
I was looking at getting a SS filter that fitted the G450X a while ago (before the Huky was listed) but then looked at the box of OEM filters in the shed and gave that idea up...
 
Londin said:
Hmmm - interested that I am..... However your price seem far better then there price :D
http://www.kandpengineering.com/2170.shtml
Click to expand...
Yea.. a word on that. The 2170 is the same filter that Scott's sells for $70 for use in the 449/511. If you don't mind paying for a full sized mesh filter, I say go for it. K&P has an agreement with Scott's to price point that particular filter (w/o a reach around).
I have found an additional filter which fits and has no price point agreement.
 
There seems to be a ton of data missing from your claim. I use paper, 3 micron filters, on a routine basis.
 
"My claim or K&P's?"

Both,

My data does not come from the internet or more importantly, those who are trying to sell filters, but from industry that needs the best they can get and regularly tests the products in independent laboratories. Micropleat by Purolator is one of many that comes to mind that filter at a very fine level.

I'm not trying to insult you but you should be more careful with where you obtain your data to make these kind of claims, all you did was simply copy and paste their website FAQ here without anything to back it up other than the site that sell these filters.
 
My knowledge of engines and components far exceeds cut and paste. Criticism's are certainly welcome, preferably when constructive. I started this thread not as an argument to which filter is better, but as information about different types of filters.
Could you please link us the filters you use on a routine basis? Other viewers may wish to use them. :)
 
Looks like a fight developing here and I don't want to play.
I'm in the aerospace industry on the maintenance and engineering side of things, have been for over twenty years now and I have some knowledge as well. We don't use critical products that are hawked on websites or advertised in magazines so there isn't much too see for the average person. Sorry
 
If you know the specs I would think so. They make a lot of rebranded filters for many companies. A call to them would be best.
 
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