the quest for ram is alittle cramped with an io-550..

mooney has big pipes feeding the engine..
http://rob.com/lancair/2003.osh/archive4.html

my first version had a "turn" to it
http://rob.com/lancair/2002.06/28oildoor.jpg
http://rob.com/lancair/2002.05/21filter.jpg
http://rob.com/lancair/2002.05/29wire.jpg

lancair columbia's filter is too small and can freeze
http://rob.com/lancair/2002.SnF/P4122886.jpg

lancair exp has better ram
http://rob.com/lancair/2003.rhv/DSCN5824.jpg
but ram air can excape out the filter.

lancair certified has a new idea
http://rob.com/lancair/Others/NorthCoast/kent.jpg

but our new theory is an automatic filter blockoff
for lancair exp's design.
http://rob.com/lancair/2004.02/

how are you feeding air to your io-550?