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Discussion Starter · #1 ·
I've noticed tremendous wind noise in my Cabrio when the top is UP. I did some research and I found other people with the same issue but no clear fix. I did a few experiments of my own and narrowed it down to the obvious suspect, the top of the windshield where the roof meets the frame.

But in my last test the car started out quiet! Then when I opened the top and re-closed it while driving the noise came back. So my current theory is that closing the top while driving causes the top to close differently, or maybe I just don't hold the "close" button down that little bit longer that would assure a complete close. That will be my next test.

So I thought I'd post here to re-activate the discussion and see what others have discovered. Whatever is going on, its pretty subtle. You can't tell the top is not closed properly by looking at it.
 

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Discussion Starter · #2 ·
OK, so here's the deal in my car. If you're standing still and press the CLOSE button you naturally hold it until that last little "umph" noise. When you're driving at 60 mph I tend to stop pressing the CLOSE button when the noise suddenly drops and the top appears closed.... but it is not fully closed. And what's more, pressing the CLOSE button now will not complete the closing. But if you open the top back up a few inches and then press close and hold it a little longer, Voila!. No wind noise.

I can't tell from the other past postings on this issue if they had this problem or not, but it was pretty baffling to me until I discovered this, so maybe it's not so obvious.
 

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2014 451 Cabrio
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If it's not raining, opening the top a fraction of an inch kills the wind noise.
 

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Hmm interesting.
Yeah, prev owner said it was his personal trick, I was skeptical, but sure enough, I tried it on the freeway at speed and it kills some 95% of the noise. Have no idea why, need to find a wind tunnel with a smoke generator. 😂

I suspect the small opening raises the cabrio material up slightly, creating a wind dam that breaks up the flow that makes the noise...
 

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I've noticed tremendous wind noise in my Cabrio when the top is UP. I did some research and I found other people with the same issue but no clear fix. I did a few experiments of my own and narrowed it down to the obvious suspect, the top of the windshield where the roof meets the frame.

But in my last test the car started out quiet! Then when I opened the top and re-closed it while driving the noise came back. So my current theory is that closing the top while driving causes the top to close differently, or maybe I just don't hold the "close" button down that little bit longer that would assure a complete close. That will be my next test.

So I thought I'd post here to re-activate the discussion and see what others have discovered. Whatever is going on, its pretty subtle. You can't tell the top is not closed properly by looking at it.
 

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Discussion Starter · #11 ·
Thanks for quoting my old post. But it turns out this was not a full solution. Noise is still terrible sometimes, even with it fully closed. I am anxious to try Zorkomatic's suggestion.
 

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Dumb question - is the little black sort-of-oval 'diffuser' still present on the upper front center of the windshield surround?

It's my understanding that is to direct airflow and cut down wind noise.

-Barry-
Hood Automotive design Art Fin Bumper
 

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Dumb question - is the little black sort-of-oval 'diffuser' still present on the upper front center of the windshield surround?
It's my understanding that is to direct airflow and cut down wind noise.
-Barry-
From an aerodynamics point of view, that thing is about as useless as rubber lips on a woodpecker.
 
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