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jump2(at)sbcglobal.net
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 Posted: Mon Aug 05, 2013 1:47 pm Post subject: K&n filter |
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Her's what happened both of mine. I had two that I swapped out alternately and this is what happens so I have 570 hr. so it looks like 150 hr will be time to switch to new one.
Sent from my iPhone
<pre><b><font size=3D2 color="#000000" face=3D"courier new,courier">
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aerosport1
Joined: 07 Nov 2007
Posts: 231
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| Posted: Mon Aug 05, 2013 1:58 pm Post subject: K&n filter |
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Like dropping the family jewels in ice cold water
Geoff
Geoff Combs
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_________________
Geoff Combs
RV-10 QB N829GW
Flying 500 hrs
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carl.froehlich(at)verizon
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| Posted: Mon Aug 05, 2013 2:21 pm Post subject: K&n filter |
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All,
I posted a couple of notes on this awhile back. This is how I solved the problem.
This is a mod to the air box I did on the RV-10, and just now back fitted onto the RV-8A.
Over the years with the RV-8A I’ve had to repair the air box and replace the filter. As you can see from the first photo, the bottom of the filter deforms (curves in). This tends to shorten the filter such that it drops out of the top and impairs the seal with the top plate. I also had to add fiberglass to the bottom of the air box as the relative motion between the bottom of the air filter the air box eroded away the fiberglass bottom.
The fix was to add a .032” aluminum plate to the bottom of the air box. The plate eliminates the bottom erosion and the added brackets hold the filter shape. A side benefit is that alternate air door now sandwiches the bottom fiberglass between two piece of metal making a sturdier install. I also took the step to add proseal between the aluminum plate and the air box bottom.
And a note on using a larger K&N filter for the RV-10
I found that the Van’s air box can be easily modified to handle the larger K&N E-1000 filter. Photo attached. This air box is made for the James Cowl.
Carl
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AirMike
Joined: 27 Feb 2007
Posts: 514
Location: Nevada
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| Posted: Tue Aug 06, 2013 8:36 pm Post subject: K&N filter |
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Just back from OSH, I had my filter out to clean yesterday. Pretty dirty after only 50 hours since my last cleaning, but after 200 hrs., I did not notice any deformation. Do you follow K&N's cleaning instructions, or are there any unique environmental factors which contribute to the shrinkage?
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jump2(at)sbcglobal.net
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| Posted: Wed Aug 07, 2013 1:16 am Post subject: K&n filter |
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Cleaned them just the way k&n says to. I have two of the cleaning /oil kits. Mine did not look all deformed but shrunk. My buddy here, his shrank more bottom then top by 1/2 inch. I fly off paved runway. Only thing we could come up with is, if you flooded the engine for starting it may not like 100ll
Patrick Thyssen
570hr
Sent from my iPad
On Aug 6, 2013, at 11:36 PM, "AirMike" <Mikeabel(at)Pacbell.net> wrote:
| Quote: |
Just back from OSH, I had my filter out to clean yesterday. Pretty dirty after only 50 hours since my last cleaning, but after 200 hrs., I did not notice any deformation. Do you follow K&N's cleaning instructions, or are there any unique environmental factors which contribute to the shrinkage?
--------
See you OSH '13
Q/B - flying 3 yrs.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=406116#406116
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Tim Olson
Joined: 25 Jan 2007
Posts: 2879
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| Posted: Wed Aug 07, 2013 2:13 am Post subject: K&n filter |
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Same here. Same thing happened, and I did clean the K&N way with the
K&N kit. I can't say I never flooded the engine, but my guess is
that this is going to be a pretty common problem for people. I'd
put filter keepers on the inside of the filter to prevent it from
pulling in, but then those keepers could end up lodged in the engine
if they snapped off, so I don't think that's really the way to go.
I also don't know if there is a shrinkage limit....like if you let
it shrink and then reposition it in the FAB, maybe you'd eventually
reach a point where it would remain that size and you could use
it indefinitely? Or if you could get a larger one and pre-shrink
it somehow?
Anyway, unless something big happens I don't see it as a major
issue, but it is something you should pay attention to at
annual time.
Tim
On 8/7/2013 4:15 AM, Patrick Thyssen wrote:
| Quote: |
Cleaned them just the way k&n says to. I have two of the cleaning /oil kits. Mine did not look all deformed but shrunk. My buddy here, his shrank more bottom then top by 1/2 inch. I fly off paved runway. Only thing we could come up with is, if you flooded the engine for starting it may not like 100ll
Patrick Thyssen
570hr
Sent from my iPad
On Aug 6, 2013, at 11:36 PM, "AirMike" <Mikeabel(at)Pacbell.net> wrote:
>
>
> Just back from OSH, I had my filter out to clean yesterday. Pretty dirty after only 50 hours since my last cleaning, but after 200 hrs., I did not notice any deformation. Do you follow K&N's cleaning instructions, or are there any unique environmental factors which contribute to the shrinkage?
>
> --------
> See you OSH '13
> Q/B - flying 3 yrs.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=406116#406116
>
>
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