FIPK's, do they really work ???

[ZmOz]

Re: FIPK's, do they really work ???

Originally posted by Ralph:<br /> K&Ns do a great job with ANY engine and they do as good or better in filtering.

That is not true. It is a well known fact that K&Ns let in more dirt. So much so that it often shows up in oil analysis results. No tests need to be done to see that...the only way to let more air through in the same space is to have bigger holes. That cannot be changed no matter what you do.

 

[Ralph 123]

Re: FIPK's, do they really work ???

Really? Where's the data to back up your "well know fact?" Why do the independent test reports say just the opposite? Why wouldn't car makers void your warranty? I think you need to read the physics behind the design as described above and maybe you missed the independent test results too...<br /><br />

Most people believe that all air filters function on a go/no go basis where dirt particles that are larger than the openings in the filter media are trapped while particles that are smaller than the openings can pass right through. A dry paper air filter does function in this manner. That’s why paper filters are so restrictive to air flow. The openings in this type of filter have to be very small to filter efficiently.<br /><br />The oiled cotton media used in the K&N air filter functions in an entirely different manner. There are scientific principles that determine how an air filter removes dirt particles from the air stream. The first of these principles is known as interception, which applies to dirt particles traveling with the air stream. Air flow will always take the shortest path and as the air is forced to flow around the filter’s fibers some of the particles will contact the sides of the fibers and be captured. These particles are then held in place by the oil or tacking agent in the fiber.<br /><br />Another principle is known as impaction, which mostly affects larger or heavier dirt particles. Impaction occurs when the inertia or momentum of the particle causes it to deviate from the flow path. In other words the heavy particles do not follow the air stream around the filter’s fibers but instead they run straight into the fibers and are captured.<br /><br />The most important principle for our use is diffusion, which deals with the laws of physics that govern the motion of very small dirt particles. Small particles are highly affected by the forces in the air stream. Forces such as velocity changes, pressure changes, turbulence caused by other particles and interaction with the air molecules cause these very small particles to become random and chaotic. As a result, these particles do not follow the air stream and their erratic motion causes them to collide with the filter’s fibers. This phenomenon enables an air filter to capture dirt particles that are much smaller than the openings in the media. In addition, the way that dirt collects or loads on the K&N filter is very different. A paper filter exhibits "surface loading" which means dust collects only on the surface of the media. In contrast, K&N filters exhibit "depth loading". The multiple layers of cotton fibers provide many levels of dust retention. This characteristic allows the K&N filter to hold significantly more dirt per square inch of media than the average paper filter. Utilizing these scientific principles, K&N has been able to design an air filter that is very free flowing while also being highly efficient at removing dirt from the air.<br />

 

[snapperbait]

Re: FIPK's, do they really work ???

Ralph.. Could you point us in the direction of a truely independent test that's NOT part of or posted on K&N's web site?......... <br /><br />Then perhaps K&N would have some legit credibilty....