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wind noise

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Post by McQ on Tue Feb 11, 2020 10:56 pm

All
I have a Sebring with the convertible top. At about 55mph wind noise starts becoming noticeable and by 70 you can barely talk to the passenger. It seems to be coming from the ends of the windshield where the top folds over (near as in can tell) I have had MGs and Triumphs with soft tops and they were way quiet by comparison. I had the top off while driving and could hear a strong wind whistle then too. My old original 3000 was also pretty quiet (except for the side pipes). it seems the shape of the w/s frame is the major factor. Has any one else noticed and/ or cured this? I know it is not ever going to be totally radio quiet, but it is really un- pleasant as is.

thanks
McQ

McQ

Posts : 23
Join date : 2018-11-04
Location : Bend Oregon

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Post by Hotrod on Wed Feb 12, 2020 10:06 pm

I'm going to hazard a guess that it's being caused by the inset windshield.  The originals and most other British sports cars had flush glass.  

The Sebring windshield frame is pretty much the exact same construction as a Manx dune buggy right down to the way the convertible top attaches.  The Manx wasn't intended to be a high speed vehicle.  The air piles up against the glass and then fights to spill over the recessed edge.  All this disturbed air causes turbulence and that's where the noise comes from, as well as considerable drag.

My 46 Ford coupe also has a recessed windshield and suffers from the same noise problem.  It was designed at a time when 50 was high speed and it does OK up to that speed. Get over that and the wind noise volume goes up quickly.  By 70, it's a roar.

I'm afraid short of a different windshield setup, there is little that can be done. Anything you could do to soften the hard edges would help.

FWIW - I built a new flush mounted windshield frame for my car, but have not driven it yet. The main problem with this is that both tops will eventually have to be modified.
Hotrod
Hotrod

Posts : 605
Join date : 2014-06-17

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Post by McQ on Thu Feb 13, 2020 9:36 pm

That makes perfect sense. Maybe I'll try some clear duct tape. ha
thanks
McQ

McQ

Posts : 23
Join date : 2018-11-04
Location : Bend Oregon

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