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K&N Ari Filter

K

KEG

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The K&N air filter that came with my 12iS Powerplant kit appears to be abour 1/4 inch too tall. Anyone else experience this?
 
KEG said:
The K&N air filter that came with my 12iS Powerplant kit appears to be abour 1/4 inch too tall. Anyone else experience this?
Click to expand...
Seems to be a problem for nearly everyone - there was another thread on this not too long ago. The advice from Builder Support was to simply fully tighten the four screws holding it to the airbox, which causes it to be a little squished but doesn’t affect function.
 
I seem to recall that one of the responses to the earlier thread pointed out that K&N had a filter that was shorter by the amount needed to avoid squishing the filter.
 
KEG said:
The K&N air filter that came with my 12iS Powerplant kit appears to be abour 1/4 inch too tall. Anyone else experience this?
Click to expand...
I did what my building buddy did on his RV-12iS and opened up the area on the cowling and then fiberglassed over the hole big enough to make the filter fit without deforming. If you do that remember to put in a water drain hole.
 
azonslow said:
I seem to recall that one of the responses to the earlier thread pointed out that K&N had a filter that was shorter by the amount needed to avoid squishing the filter.
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Do you recall the title of that thread?
 
I believe what you saw was the difference between the RU-0800 that comes with the kit, vs. the RU-0700. Their heights are the same, 4”, but the opening for the air-intake tube is 0.02 mm larger on the 0700. Some builders have difficulty inserting the tube through the 0800 opening, so suggested the 0700 as an alternative.
 
Bob Y said:
I believe what you saw was the difference between the RU-0800 that comes with the kit, vs. the RU-0700. Their heights are the same, 4”, but the opening for the air-intake tube is 0.02 mm larger on the 0700. Some builders have difficulty inserting the tube through the 0800 opening, so suggested the 0700 as an alternative.
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Thanks for the response. I am aware of that fitment issue and the RU-0700 as a cure. I am looking to solve the issue of the filter beiong too long. I can't believe Van's cure of smashing the filter out of designed shape by forcing it into the space using the four plate screws. Per K&N's web site, the 0700 is the same length as the 0800.
 
Yes -something has changed. Either the filter or the cowling. What is the actual height of the filter that came with the engine?
If it is 4 inches then we know the cowling has changed.

RU-0800.png
 
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Either way I would not squash the filter. You could just put some spacers between the top plate and the cowling - foam strips or rubber washers - I see no reason the top plate has to be flush with the cowling.
 
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This thread as well as this one -

12iS Air Cleaner Fitment

Anybody know why this would not solve the fitment of the 12iS air cleaner being squashed? It is 3/16 in thick and fits under the FF-00120 after match drilling the 4 mounting holes.
vansairforce.net

are referring to the problem of the RU-0800 being too long for the newer cowling.

Both the RU-0800 and the RD-0700 are 4 inches long so the RD-0700 doesn't solve that problem.

However, the RD-0700 has a 2.5 inch flange which is a better match for the 2.5 inch connector tube than the RU-0800.

12iS air induction not fitting

I cannot get the FF-00122 aluminum tube to fit inside the rubber neck of the air filter in this assembly. The inner diameter of the filter is about a 10th of an inch smaller than the aluminum tube. I am nearing destroying the filter trying to get it to fit. What am I missing? :confused: I’m...
www.vansairforce.net
 
I created a 3D printer file for a spacer that cures the squasing of the filter problem. It is a 3/8" spacer that is put beneath the metal closure plate. I printed it with high temp filament due to its proximity to the engine exhaust.
 
KEG said:
I created a 3D printer file for a spacer that cures the squasing of the filter problem. It is a 3/8" spacer that is put beneath the metal closure plate. I printed it with high temp filament due to its proximity to the engine exhaust.
Click to expand...
Ken would you mind sharing the stl file in the 3D Printing thread... 3D Printing thread
 
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