REFLECTOR: ram air vs filter

[Jack Sheehan]

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" <mailto:tomcat05 at comcast.net><tomcat05 at comcast.net>
>>To: <mailto:reflector at tvbf.org><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.
>>>_______________________________________________
>>>To change your email address, visit
>>><http://www.tvbf.org/mailman/listinfo/reflector>http://www.tvbf.org/mailman/listinfo/reflector
>>>
>>>Visit the gallery!  <http://www.tvbf.org/gallery>www.tvbf.org/gallery
>>>user:pw = tvbf:jamaicangoose
>>>Check new archives: <http://www.tvbf.org/pipermail>www.tvbf.org/pipermail
>>>Check old archives: 
>>><http://www.tvbf.org/archives/velocity/maillist.html>http://www.tvbf.org/archives/velocity/maillist.html 
>>>
>>>
>>
>>
>>_______________________________________________
>>To change your email address, visit 
>><http://www.tvbf.org/mailman/listinfo/reflector>http://www.tvbf.org/mailman/listinfo/reflector
>>
>>Visit the gallery!  <http://www.tvbf.org/gallery>www.tvbf.org/gallery
>>user:pw = tvbf:jamaicangoose
>>Check new archives: <http://www.tvbf.org/pipermail>www.tvbf.org/pipermail
>>Check old archives: 
>><http://www.tvbf.org/archives/velocity/maillist.html>http://www.tvbf.org/archives/velocity/maillist.html
>>
>>
>>
>>
>
>
>--
>
>-
>     Rightful liberty is unobstructed action according to our will 
> within limits drawn around us by the equal rights of others. I do 
> not add "within the limits of the law," because law is often but 
> the tyrant's will, and always so when it violates the rights of the individual.
>
>     Thomas Jefferson
>_______________________________________________
>To change your email address, visit 
>http://www.tvbf.org/mailman/listinfo/reflector
>
>Visit the gallery!  www.tvbf.org/gallery
>user:pw = tvbf:jamaicangoose
>Check new archives: www.tvbf.org/pipermail
>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20070607/02ca9582/attachment-0001.htm