Paper VS SS oil filters..

Dirt Bike Technical discussion. This is for a little more in depth discussions :-)
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Sandblaster
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Paper VS SS oil filters..

Post by Sandblaster » Thu Jun 20, 2013 6:47 pm

My Dad sent me the following info.
I think it came from F650 web forum... Not sure.. :

Standard Paper Filters will trap down to about 40-microns. A micron is one
thousandth of a millimeter. That's about .00003937 inches 35 microns is
about .00138 inches ( Just over one thousandth of an inch) ADB Oil Filter
will not pass any particle larger than 35 microns, the average human hair is
140 microns thick. High Performance filters will trap down to 15-20 microns.
A really good re-usable Stainless steel mesh filter will trap down to 5-10
microns.

Also the oil will flow through the re-usable filter when it is really cold.
Often the paper filter stops most of the really cold oil and the oil has to
go through the bypass valve, until it warms up. Here's a site for Stainless
Re-usable filters, showing about 2X the filtering capability of paper.

These are not as good as some $100 units available for Cars and Big Trucks.
http://www.americandirtbike.com/k&p.htm.

Let's try this one again. It's not the Stainless filter that goes into
Bypass mode with cold oil, it's the standard Paper filter. The following is
from the Scott Site "Consistent flow under all conditions: Stainless steel
will stand up to the stress of heat, high pressure and physical handling
much better than paper or brass. This filter maintains consistent flow under
all conditions including cold start ups and or under extreme heat. A one
inch square of this micron filter material will flow 1.9 gallons of 90
weight oil per minute at only 1 psi pump pressure (70 degrees F). Our
typical filter size is 30 sq. in. which equals the flow of 57 gallons per
minute. Standard paper filters do not flow well when the oil is cold, often
causing the bypass valve to open allowing unfiltered oil to enter your
engine. Dick #420
If bikes are for kids I'll never grow up.

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Sandblaster
Posts: 6313
Joined: Thu Jun 07, 2012 3:50 pm
Location: Eugene, OR
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Re: Paper VS SS oil filters..

Post by Sandblaster » Thu Jun 20, 2013 6:47 pm

That's all fine and dandy, I had a SS filter in a custom built trans and it did a wonderful job, was easy to clean, and reusable.
My question is, if you keep your oil clean by changing it often, is it really a big deal?
If bikes are for kids I'll never grow up.

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