Just stuff  a K&N cone filter in the 3 inch opening and duct tape it
     > >>> in
     > >>> place. You'll lose a bunch of power but you can still fly.
     > >>> Air pressure will help hold it in.
     > >>>
     > >>> That last idea is what Mooney does. Put a slide valve in the ram air
     > >>> scoop
     > >>> and a tennis ball one way valve in a filtered hot air pipe feeding one
     > >>> end
     > >>> of the plenum. Once the ram air valve is open the tennis ball one way
     > >>> valve will close.
     > >>>
     > >>> Paul Lamar
     > >>
     > >> Will you draw such a system?   Please.    Jerry
     > >
     > > Here is a slightly better version.
     > >
     > > BTW if the snorkel ices up this ball valve automatically opens up
     > > providing heated air to the intake system.
     > >
     > > Paul Lamar

Ok, Paul you know that even race engines often use air filters now.
The usual criteria are similar to the radiators large area thin section. Jerry
if you want to use a filter you need to have a alternate air source, as the
filter may clog with ice. The best method is to use a large (volume) air
box with the major volume after the filter. The modern cars use a style
that indicate that the designers are familiar with K & L. The filters are
large area flat rectangles with a wedge inlet, followed by a large clear
exit box. Jerry since you will probably need a round cylinder to fit it in.
The small tapered filters will be way to restrictive. You need a larger
volume. The bigger the better.
Bill Jepson

Not if they want to win :) Drag races are sometimes won on .001 seconds.

On a 24 hour race the winning car is 5 feet in front of second place.
What is the percentage difference in performance? :)

Paul Lamar
 
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