intake air filter choices

[Dick[_1_]]

After using a lawn tractors slightly oiled, green foam filter on my
experimental with C-85, a fellow remarked that it was much too thick (about
1") as I replaced it.

Just wondering what non-certified (read cheap <G>) alternatives that others
are using. Seems like most guys use a pleated paper-like filter...

Thanks Dick

[jls]

"Dick" > wrote in message
news:GiKrh.2487$jG1.88@trnddc04...
> After using a lawn tractors slightly oiled, green foam filter on my
> experimental with C-85, a fellow remarked that it was much too thick
(about
> 1") as I replaced it.
>
> Just wondering what non-certified (read cheap <G>) alternatives that
others
> are using. Seems like most guys use a pleated paper-like filter...
>
> Thanks Dick

A Brackett filter for a certified aircraft with C-85 would be about
the same thickness. You don't want to suck anything, such as a part
of the filter, up into the carburetor.

Even Bracketts have had their problems with AD's because of parts of
the filter migrating into the venturi.

[Maxwell]

"Dick" > wrote in message
news:GiKrh.2487$jG1.88@trnddc04...
> After using a lawn tractors slightly oiled, green foam filter on my
> experimental with C-85, a fellow remarked that it was much too thick
> (about 1") as I replaced it.
>
> Just wondering what non-certified (read cheap <G>) alternatives that
> others are using. Seems like most guys use a pleated paper-like filter...
>
> Thanks Dick
>

Check with the K&N filter folks. They have a lot of high performance filters
to choose from.

[Maxwell]

"Dick" > wrote in message
news:GiKrh.2487$jG1.88@trnddc04...
> After using a lawn tractors slightly oiled, green foam filter on my
> experimental with C-85, a fellow remarked that it was much too thick
> (about 1") as I replaced it.
>
> Just wondering what non-certified (read cheap <G>) alternatives that
> others are using. Seems like most guys use a pleated paper-like filter...
>
> Thanks Dick
>
http://www.knfilters.com/

[Dan Youngquist]

On Thu, 18 Jan 2007, Maxwell wrote:

> Check with the K&N filter folks. They have a lot of high performance
> filters to choose from.

Amsoil makes an oiled foam filter that flows as good as K&N, and filters a
lot better. (And last I looked, they're cheaper.) They have them for
most automotive applications.

-Dan

[john smith]

Dick wrote:

>After using a lawn tractors slightly oiled, green foam filter on my
>experimental with C-85, a fellow remarked that it was much too thick (about
>1") as I replaced it.
>
>Just wondering what non-certified (read cheap <G>) alternatives that others
>are using. Seems like most guys use a pleated paper-like filter...
>
>Thanks Dick
>


Foam filters have a history of coming apart, getting sucked into the
carburetor, and causing blockages which results in the engine stopping.
Makes for interesting emergency landing explanations.

[Scott[_1_]]

Cripes! How cheap is cheap?! A replacement Brackett air filter is only
about 6 bucks and you replace it at each annual (unless you live in a
particularly dirty and dusty area)...

Scott



Dick wrote:

> After using a lawn tractors slightly oiled, green foam filter on my
> experimental with C-85, a fellow remarked that it was much too thick (about
> 1") as I replaced it.
>
> Just wondering what non-certified (read cheap <G>) alternatives that others
> are using. Seems like most guys use a pleated paper-like filter...
>
> Thanks Dick
>
>

[Dick[_1_]]

ordered 2, thanks
"Scott" > wrote in message
.. .
> Cripes! How cheap is cheap?! A replacement Brackett air filter is only
> about 6 bucks and you replace it at each annual (unless you live in a
> particularly dirty and dusty area)...
>
> Scott
>
>
>
> Dick wrote:
>
>> After using a lawn tractors slightly oiled, green foam filter on my
>> experimental with C-85, a fellow remarked that it was much too thick
>> (about 1") as I replaced it.
>>
>> Just wondering what non-certified (read cheap <G>) alternatives that
>> others are using. Seems like most guys use a pleated paper-like filter...
>>
>> Thanks Dick

[[email protected]]

john smith wrote:
> Dick wrote:
>
> >After using a lawn tractors slightly oiled, green foam filter on my
> >experimental with C-85, a fellow remarked that it was much too thick (about
> >1") as I replaced it.
> >
> >Just wondering what non-certified (read cheap <G>) alternatives that others
> >are using. Seems like most guys use a pleated paper-like filter...
> >
> >Thanks Dick
> >
>
>
> Foam filters have a history of coming apart, getting sucked into the
> carburetor, and causing blockages which results in the engine stopping.
> Makes for interesting emergency landing explanations.

We've been using the Brackett foam filters on our training
airplanes for 14 years (and 13 airplanes, five or six at any one time,
hundreds of hours per year per airplane) and have had no trouble
whatever. The filters work well enough that the engines reach TBO with
the compression still in the high 70s, even though we do a lot of
training off dirt strips, and are cheap to replace. It's not an oil in
the Brackett filter, its a glycerine or silicone goop of some sort.
Can't try to wash and re-oil it. It needs to be replaced yearly in any
case to prevent decaying foam getting into the intake.
There have been a couple of ADs against the Bracketts: one
involved the rear screen (aluminum) vibrating and flexing then breaking
and entering the engine; it was superceded by a steel-screened frame.
The other was to do with the filter frame/airbox gasket on some models
getting sucked in; another revision fixed that.
Every time we get another airplane it gets a Brackett.

Dan