I'm not familiar with your layout or dimensional limitations so forgive
     me if this idea I'm throwing out bounces straight into the trash bin.

     What about a low profile flat panel filter like what the RX-8 and most
     newer cars use? You can have the open airhorns inside a sealed box with
     the panel in the cover and the inlet duct feeding into it. The filter
     panel in the RX-8 is approx. 8" W x 15" L x 1" Thick. It would take
     some fab work though as the panel would need to be secured against a
     sealing flange around the box opening for it. A K&N flat panel for the
     RX-8 is approx.$45 from Summit Racing, but K&N sells universal versions
     too if you require different dimensions to make it work.

     Mark Sipe

     Yes I can make anything work. With the flat panel filter you need room
     at the top
     and bottom so it is a bit thicker than two cone filters side by
     side 3" OD and 7 inches long. With the scoop on the top of the cowl
     the air needs to make a right angle. Moving the scoop over to
     the cool side of the cowl means a long hose which is a pressure loss in
     and of
     itself. Especially if it is corrugated.

     On the Mustang II we are trying to make the cowl look like a real
     Mustang.
     Or at least I think that is what Mark wants. He has sent
     me no sketchs yet so I am not sure. Here is my best guess so far
     using a 14 inch diameter spinner. I think he wants to make his own
     cowl.

     What I really need are dimensions of different filters.

     Paul Lamar ...No rotor no motor.


     Mark/Paul,
     Regarding the flat filter, couldn't you angle it so that the air plenum
     wouldn't have to be thicker? Just slice the box diagonally, install a
     couple of flanges, insert a filter element, and you have filtered air.

     Mark Steitle
     (Since there are three Marks on the list, I'm signing full name so as
     not to confuse.)


     Good idea Mark (about signing full name :))

     Everything depends on dimensions. I'll see if I can find the K&N web
     site if they have one.

     Paul Lamar ...No rotor no motor.

  It's a tight fit in my cowl, but I think I can fit a flat filter into my
system. I'll send photos as soon as I have it fabricated- about two or
three days from now.

Brian Trubee

I used a flat filter in my Cozy (pusher). I've got arm-pit scoops under the
strakes/wings that are about 2" by 6".  Picture "intake4" shows access to
the filter for maintenance.  The filter is about 6x12 - it's for a Dodge
Caravan and Ford Ranger if I recall (I'd have to check my engine log to be
sure).

Joe Hull
Cozy Mk-IV #991 Rotary 13B NA (Done Building! In Phase1 Flight Test - 0 hrs
flown)
Redmond (Seattle), Washington


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