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  #1  
Old 07-12-2018, 10:28 PM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
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Default Cowl fitting and the inlet ramp

Cowl fitting and the inlet ramp

Two questions about fitting the cowl, does the rubber seal of the inlet ramps sits on top of the ramp or just there to close the gap.
If it sits on top of the ramp, which I believe it should, how was the fit of your cowl inlet in relation to the ramp on the pilot side?

I have attached my snorkel to a very nice fit and my initial cowl setup of top and bottom was very good. After fitting the top cowl, per plan, and the bottle cowl the inboard lip of the air inlet is at or slightly above the ramp (only on the inboard side) which means my seal cannot sit on top of the ramp.

I have manipulated the bottom side to come as high as it can and still maintain a good fit. I rather not push the whole thing up as my sides will end up with a larger gap than desired and would not leave room for engine sag.
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  #2  
Old 07-13-2018, 07:08 AM
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DanH DanH is offline
 
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http://www.vansairforce.com/communit....php?p=1238660

Rebuilt/refit as needed, or pay a price forever.
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  #3  
Old 07-13-2018, 07:35 AM
Bavafa Bavafa is offline
 
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Quote:
Originally Posted by DanH View Post
http://www.vansairforce.com/communit....php?p=1238660

Rebuilt/refit as needed, or pay a price forever.
Thank you Dan. Planning as prescribed.

Luckily, mine does not seem nearly as bad as some others who have posted pictures. It is more or less like the picture in your link. I think I should be able to make this work, else back to re-building.
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  #4  
Old 07-13-2018, 08:27 AM
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Long term, a bit of engine sag is to be expected, something to keep in mind.
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Last edited by DanH : 07-13-2018 at 04:12 PM.
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  #5  
Old 07-13-2018, 08:31 AM
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RV-14E RV-14E is offline
 
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I had a similar issue. Van's indicated to me that I should expect this fitment to improve as the engine sags due to the engine mounts relaxing over time.

The area of interest is here (thanks to my friend and builder, Greg in Perth for this diagram). This image is not necessarily to scale.



The following is described in more detail here on my blog.

My bottom cowl sat too low relative to the intake. This is evident in the distorted profile of the CB-00032N Cowl Baffle Seal. It made placing the bottom cowl a challenging affair.



You can see the misalignment here. You're looking edge-on to the baffle seal: The bottom cowl is the lowest piece in the image, the baffle seal is folded forward, the next layer is the snorkel and the two pieces of (primed) metal are the CB-00033 Air Filter Frame Cover and CB-00020 Air Filter Frame.



One friend of mine adjusted the height of his snorkel. I took a different approach. The cowl was cut then reworked with a new buildup.



Without the CB-00032N Cowl Baffle Seal in place, you can see the better fitment.



Here's the final result.



It looks symmetrical and level relative to the right side.

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Last edited by RV-14E : 07-13-2018 at 08:51 AM.
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