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I'm
glad you threw this in Jerry. I'd just woefully discovered that my 4x10 flat
K&N filter was undersized at only 40 sq in, however you just quadrupled that
to 160 sq in.
But this discussion has got me to thinking and I just
realized that I've been using my filter with airflow backwards... DO'H! I
built my airbox such that it sits in upright, but recent comments reminded me
that the normal airflow on cars has the flow come in from the bottom. I'd be
surprised if it made much difference until the filter is near dirty anyhow, but
maybe I'll check to see if I have the clearance to set the filter into
it's holder upside down.
Todd (up over with down under
filter)
Ps; Ed
as usual, nice work with the spreadsheet.
Ed, the surface area of the filter is much
greater than its circumference x height due to the folding of the element. I
just checked mine and each inch equals 4 inches if stretched out. Thus the
surface area on my 5.5 in. round x 5 inch high filter would be over 300 sq.
in. Jerry
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