Sun Roof wind Noise

red-beard · red-beard's Garage

There is a small metal flap/strip that pop up when I open the sunroof on the 1982 SC. This seems to generate a lot of noise on the highway. I can put my hand up and rotate it down and the noise level drops off. Is this supposed to pop up? Is there a way to keep this down?

James

island911 · 10-10-2003, 09:29 AM

You can take it off; but realize it does have a purpose.

Its intent is to produce a small amount of turbulance (to the air) . ..with it off you will experience some nasty low freq. resonance. (at certain speeds, your cabin becomes a kind of giant whistle). This resonance can usually be defeted by cracking a window (or 2) open.

red-beard · red-beard's Garage

Hmmmm. I supposed I can fabricate a clip to hold it down. This just seems an in elegant solution.

island911 · 10-10-2003, 09:51 AM

Believe me, I've had the same thoughts. At freeway speeds, it really makes a lot of noise.

I know that some of the later Carreras got a supposedly improved version (air-deflector).. .don't know if it's all that much better, but I do know you can udate an SC with that version.

gerard vaglio · 10-12-2003, 09:00 PM

You guys have inspired me to experiment.

I’ve always thought the sunroof air foil, I just made that name up, is too noisy so this afternoon I decided to take it off. Removing it only takes a few minutes and I ran a quick errand afterwards. I only got the car up to 60mph, but here is what I noticed.

As you might expect, with the sunroof open the car is much quieter now. However, a very pleasant, unexpected benefit was better air circulation in the cabin. The air has always been a little still in my sc even with all the windows open. It was fun to feel a little breeze which helps contribute to the overall feeling of movement as your going down the road.

Next outing I’ll go on the freeway and see what happens when I go a little faster.

If you read any stories in the newspaper of a guy sucked out of his car you’ll know it was me.

Speedy1 · Speedy1's Garage

James my 82 sc deflector sticks in the down pos if you want to trade let me know? I pull it to the up pos when I drive to me the noise isnt an issue I just turn up the tunes

RoninLB · 10-12-2003, 10:41 PM

my stock deflector makes more noise than my brothers '88.. and I've spent weeks traveling in that car.. so I have a new/old Carrera deflector that hasn't been installed yet.. I never thought of removing it till now.
The wind noise is unwanted distorted tunes IMO.......Ron

RoninLB · 10-12-2003, 10:44 PM

Quote:

Originally posted by island911
. ..with it off you will experience some nasty low freq. resonance. (at certain speeds, your cabin becomes a kind of giant whistle). This resonance can usually be defeted by cracking a window (or 2) open.

yeah huh..
what about leaving the rear quarters open?

aigel · aigel's Garage

I have the perfect solution: Broken sunroof mechanism. Will never open!

G.

hoosierdaddy · 10-13-2003, 03:19 AM

What if you drilled a series of holes in the deflector ? Would this make the wind noise quieter and still allow the deflector do it's intended job ?
Jim

red-beard · red-beard's Garage

In a word - no

Nope, this thing just needs to lay flat when not needed.

James

Danskman · 10-13-2003, 08:50 AM

I read this thread last week knowing that I had a 2 1/2 hour drive coming up on Saturday. Crusing at 70-75mph I reached up and pushed the deflector down (80SC metal one), and it was a bit quieter, but the wind blast came down and hit me in the top rear of my head. Didn't like that at all. Tried it several times. One time I held it down for a long time, and it really bothered me. Sounds like the solution, if any, is to upgrade to the later black plastic deflector.