REFLECTOR: ram air vs filter

[Lou Stedman]

For what it is worth, I am using a K&N filter listed for the O-360, 200HP, in the Van's Aircraft Catalog. The part number is 33-2060. Van's is the best price by far.

Lou Stedman
Velocity N7044Q
Olean, NY
  ----- Original Message ----- 
  From: Scott Derrick 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Thursday, June 07, 2007 6:35 PM
  Subject: Re: REFLECTOR: ram air vs filter


  information yes, but no table that lists their air filters by CFM.  I know the CFM requirement and I know K&N filters flow 6 CFM per sq inch, but from there it hunt a peck for one that will work...

  Scott

  Jack Sheehan wrote: 
    Scott,
    I think K&N had some informaton on that. It is based on the volume of air ie cubic displacement times operating RPM  gets you t a filter area requirement. 
    Jack
    N55XL

    At 07:24 PM 6/6/2007, you wrote:

      I'm just about to start on a new air box to hold an air filter.  I will still use the strake mounted ram scoop for intake but want an air  filter before the turbo intake. My IO360 setup had no filter and I never liked that much.

      I was thinking about what size filter I need for 325 HP. Anybody know of a table online for that?

      Scott

      Lou Stedman wrote: 



I just did the same thing on my Velocity. I was very concerned with
dust and 
sand being kicked up from the wheel to our rear mount engine scoops. I
have 
a 2" diameter belly scoop mounted dead center of the lower cowl. I
formed up 
a fiberglass cover for a 6"x6" K&N which is designed for
the O-360. Then I a 
2 3/4" scat tube running from the filter box to my throttle body
(fuel 
injected). I had some other issues that needed correcting so I have not
been 
able to test fly it yet but I will report back in a couple of days.

Lou Stedman
Velocity N7044Q
Olean, NY
----- Original Message ----- 
From: "Tom"
<tomcat05 at comcast.net>
To: <reflector at tvbf.org>
Sent: Wednesday, June 06, 2007 3:00 PM
Subject: REFLECTOR: ram air vs filter


 
      

Yesterday I added a K&N cone filter directly to the intake on
the
engine. I have updraft cooling and the cone was located near one of the
inlets so I assumed sufficient air would be available. Test flew this
morning and lost about 1.5" of manifold pressure and 200 rpm (fixed
pitch so this translates directly to speed). Additionally the plugs
loaded up. Pulled the filter today and put the ram air back as engine
was obviously not getting sufficient air. Just an FYI for anyone
contemplating something similar.
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