Air filter fitting ???

[Python]

Hi, I’m looking at a solution to a problem I have with my RV 6 ( O 320) air filter fitting.The problem is that someone has hacked away at the air filter ( K&N E-3260) & filled with silicone as per the photos, I don’t like the look of it at all. The bottom of the Carby plunger & some of the body protrudes below the flat surface on the Carby (see photos)Has anyone seen this before & if so do they have;solution. Thanks

 

[Larco]

If you look at the plans it might be that this was done per the plans. lots of discussion about this on the forum from time to time?

 

[Kyle Boatright]

That's pretty much how the plans have you do it on the O-320. That isn't the neatest silicone job I've seen, but it should work fine.

 

[planenutz]

This "solution" involving the removal of material from the filter element and the application of red silicon is pretty standard on the Vans Airbox. I'm not saying its a pretty standard, but it is pretty much the standard. As an engineer I have never liked it but I must admit that it works and best of all, it works well. All the normally aspirated Vans aircraft I've worked on employ this solution.

 

[StephenC]

There is an alternative K&N filter that can be used that does not require the cutout. I cannot recall the number at the moment but I did order one with the intention of trying it. I found the replacement filter was not as rugged as the original and a new bottom plate needed to be cut out so that is sitting in my things to do pile. If you want to see more info do a search through the archives.
Meanwhile I will continue to use the cut filter as it does seem to work ok if you do it carefully enough and I haven’t seen any evidence of dust or dirt getting through.

Check out
https://vansairforce.net/community/showthread.php?t=185156