The ad seems to imply that the size of the hole in the foam determines the size of particle that will be trapped (or passthrough). I always believed that the foam was a just a carrier that the filter oil could cover, and that the oil would trap the dirt. Obviously it has to be open cell so there is a path for air to get from one side to the other but, in the end it is the oil that does the filtering. During my time working on Cat tractors, the oil bath filters used wire mesh - pretty open - to hold the oil. The level of oil was just below the bottom of the mesh and would splash up due to machine movement. The other part of the filtering was that the intake air was drawn down the centre and then turned up into the mesh- the heavier particles of dirt went straight down into the oil and were trapped, Oil bath filters only went out of favour because of the high maintenance (wash out every day in very dusty conditions) they required vs paper element filters, which, when coupled with a cyclonic pre-cleaner, were as effective
it's not a bad thing till you throw a KLR into the mix.
those cheap ass bitches can do anything with ductape.
(PostalDave on ADVrider)
Bookmarks