Kirk,
My K&N filter on my single HIF44 *IS* foam.... I thought K&N filters were
made of foam... That said, I'm sure there are different grades of foam and
therefore different degrees of filtration/intake restriction.... I love
the K&N as I can use the cleaning kit periodically without having to buy a
new filter... As long as you have some filtration going I doubt you've
harmed your engine... On the other hand, as Vizard points out, running
with *NO* filtration ain't a good thing to do unless you plan to rebuild
that race engine a coupla times a year ;-)
Cheers!!
Jim
On Sat, Oct 2, 2010 at 4:27 PM, Kirk Hargreaves <khargreaves2@gmail.com>wrote:
> I came across this very interesting video of David Vizard talking about air
> filtration whereby he displays his appreciation for K & N filters. He also
> talks about paper filters, but makes no mention of foam filters.
>
> Here is the video. . taken in Australia several years ago. It is an
> absolutely fascinating break down on what he eventually found regarding how
> the K & N filters actually work. He indicates that it took him several
> years to get an answer to the dynamics involved with the K & N filtration
> systems. Truly worth a few minutes to watch his presentation on the
> subject.
>
> http://www.youtube.com/watch?v=F1BZg6aCGd8&feature=related
>
>
> He also mentions, in this video, that he did an experiment where he found
> that an unfiltered race engine, running on asphalt, during a single race,
> picked up a tea spoon worth of road crap that ran through the engine. As
> such he points out how destructive it is to run an engine without
> filtration
> and then goes on to give more information on the K & N filters unique way
> of
> providing excellent breathing while at the same time doing an outstanding
> job of filtering.
>
> He only mentions paper and K & N filtration with no reference to foam
> filters . . which brings me to my question (finally to my question)!
>
> I have been using two foam filters on my OER side draft which is the
> Japanese equivalent of the DCOE 45.
>
> I would like opinion on whether or not my foam filters are doing a decent
> job of filtering? I do plan to upgrade with K & N's. . yet at the same
> time I have put a good amount of miles using the foam filters and wonder if
> I have caused unnecessary harm to my motor?
>
> Thank you so much for all the previous help I have received from the list.
> . it is so appreciated.
>
> Kirk
>
> 59 1275
>
> PS
> The OER takes the same jets and emulsion tubes, etc as the Weber. . and I
> think it is a fantastic alternative to the Weber as it also allows you to
> adjust the float bowl height as well as the accel pump. . (I like to put a
> plug in for the OER as I think that it is a fantastic carb)!
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>
--
Cheers!!
Jim
"The problems that exist in the world today cannot be solved by the level of
thinking that
created them."-Albert Einstein
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