: Sunroof wind screen



WannaV
04-08-13, 11:58 AM
Weather finally got nice enough to open up the sunroof. I noticed there is a netting that pops up when the sunroof is open...... I am assuming this is a wind diffuser so you don't get wind buffeting inside the cabin. My only problem with this design is that it catches bugs in the net. I got home and there were probably 30-50 dead bugs in the netting. I guess you could close the sunroof and ignore it, but not me. I used my car vacuum and swept it out. I have had several cars with sunroofs but never had the netting with it. Anyone else notice this?

bravnik
04-08-13, 12:05 PM
Ack - That is just going to be bad here pretty soon. I open mine all the time and never thought to check that. Nasty!

jmvohs
04-08-13, 02:12 PM
I love my ATS. The only thing about the car I don't like is the wind diffuser on the sunroof. Not only does it catch bugs, but it terribly noisy at highway speeds.

WannaV
04-08-13, 02:25 PM
I noticed the noise at highway speeds also --- it is noiser than my wifes Enclave.....

mikesul
04-08-13, 02:41 PM
I noticed it and thought it was a cheap, noisy solution to wind buffeting. Hadn't even given thought as to it being a bug catcher, oh my.

hood101010
04-08-13, 03:12 PM
Can it be easily removed? I noticed mine making noise once too.

WannaV
04-08-13, 03:39 PM
If you reach up and push it down in the folded position, you will notice it makes MORE noise without it......... so I wouldn't remove it.....

rustybear3
04-08-13, 10:01 PM
Don't know about the bugs, but my deflector is absolutely NOISE FREE....relatively speaking...wouldn't hardly even know the sunroof is open; I've had sunroofs on every Cadillac I've owned, and this is the quietest one yet. That being said, I think I prefer the solid look of my previous deflector on my 2008 STS instead of the net. I bet this could be changed out down the road....

miguelius
04-09-13, 12:00 AM
I think the purpose of the net webbing on the deflector is aerodynamics, because being porous, it probably does not create as much drag as a solid deflector would, yet it breaks up the airflow to reduce wind buffeting with the roof open. So the engineers did not use it because the porous wind deflector is cheaper, but because it serves a function. Hey, guys, when a sunroof is open, you're going to have significant wind noise especially at higher speeds:yup:.

Neuroleptic
04-10-13, 11:12 PM
I actually held it down at about 45 mph and it was much quieter than with it was with it up. I would like to know if we could take it off too.

WannaV
04-26-13, 11:33 AM
Try going faster and hold it down.......

DavidL
04-27-13, 09:21 AM
I agree that my ATS sunroof is considerably quieter than the one on my 2010 CTS... go figure...

rustybear3
04-27-13, 03:03 PM
I agree that my ATS sunroof is considerably quieter than the one on my 2010 CTS... go figure...

Yeah I know....it sounds like they are talking about different cars than ours. As I stated before, quietest sunroof I've ever had.

73JPS
04-27-13, 08:22 PM
Yeah I know....it sounds like they are talking about different cars than ours. As I stated before, quietest sunroof I've ever had.

People just don't consider all of the variables, the most obvious of which would be ambient wind. Just 20 mph of headwind would make a huge difference to the noise level of a sunroof at an indicated speed of, say, 45 mph. The quietest sunroof I ever owned was the one on my 2004 RX-8, but I fully admit that most of my "test" data was late at night (when winds were light or non-existent) and at road speeds of less than 50 mph. But damn, that was one awesome sunroof!

F111A
04-30-13, 10:34 PM
I have the same concerns about the net - it will catch bugs and it is rather cheap feature on the ATS. I question how long the netting will last and think it was just added as a feature to save money. Not to make it too complex, but drag is roughly proportional to velocity squared. Having holes in the netting has negligible affect since the small holes in the netting essentially choke/stagnate at normal vehicle speeds - may as well have a solid/metallic piece of material.

I hope Cadillac comes up with a kit for the ATS to eliminate the cheap netting that has a very short lifespan.

pissedoffwookiee
05-02-13, 06:48 PM
Netting not so cheap, Cadillac spent so much time and effort going after BMW feature for feature that they got as many of the bad BMW traits, as they got the good. The night I got my ATS my buddy was at the dealer with me looking at one for his wife, he loved the car was super impressed, but told me the sunroof is exactly like his 9 month new 2012 BMW 750LI with msport pkg, noise and all. I'm happy and sad to announce to all here, that we have the sunroof of a $105,000 BMW in our little charmer of a car.

A side note, he traded it in a week later for 2013 M5 executive pkg, and was delighted that BMW reverted back to their "shark fin" hard plastic wind deflector and the roof is quiet and awesome, and wife got an X5 Diesel, ATS trunk too small for a B.O.B. stroller.

I'm happy to report, that on my ATS', birthday we drove the v6 ATS and later when I brought home my turbo we flogged both on some windy roads, he loves the cars, caddy has come a long way and it was only trunk space that kept him from a black/morelo red premium that night and yes, he let wring out his M5 on some twistys, WOW, I cant wait for the new ATS-V/CTS-V when they come out.

F111A
05-02-13, 07:34 PM
Well, shame on Cadillac for getting the wind deflector wrong as BMW. My last 2 cars all had sunroofs and I purchased my ATS with a sunroof but the ATS wind deflector is by far the worst wind deflector in terms of appear and performance. Cadillac should consider running a Computational Fluid Dynamics (CFD) model to determine which design is best for noise/drag. CFD will not tell how long the wind deflector will last but I am sure automobile manufactures have a good idea of what their warranty cost are and how much the feature adds to the cost of the car.

pissedoffwookiee
05-02-13, 07:51 PM
Well, shame on Cadillac for getting the wind deflector wrong as BMW. My last 2 cars all had sunroofs and I purchased my ATS with a sunroof but the ATS wind deflector is by far the worst wind deflector in terms of appear and performance. Cadillac should consider running a Computational Fluid Dynamics (CFD) model to determine which design is best for noise/drag. CFD will not tell how long the wind deflector will last but I am sure automobile manufactures have a good idea of what their warranty cost are and how much the feature adds to the cost of the car.

Agreed, but hey the ATS is a HUGE!!!! leap forward for GM and in my opinion a fantastic 1.0 effort, it's easy to forget that BMW has/had the best small/mid sedan for the last 25 years or so, just plain fact, so in addition to tech like CFD they have experience and huge pools of data to draw from. I can only hope to see continued improvement from cadillac, the shame in my book would be if they repeat these mistakes.

F111A
05-02-13, 07:57 PM
Well said. Overall I really like my ATS and the deflector/screen on the sunroof is not a deal breaker but I hope Cadillac considers making an improvement in the coming years.

pissedoffwookiee
05-02-13, 08:33 PM
Me too, brother, I can't wait to see the next CTS, people I've spoken with who have seen/touched/sat in the car tell me it's amazing, and the Escalade is supposedly nicer still. I was told Cadillac apologized to them for the plastic in the Escalade, and that the current platinum trim is the quality level of the upcoming base model and since that interior was done by these folks http://www.draexlmaier.com/en/products/interior.html it bodes well for their future products.

Ben003
05-04-13, 05:23 PM
Based on personal experience the harder plastic air foils can pose problems.

A number of years ago while driving my '96 Audi, sunroof open at dusk a bat flew into the tailing edge of the open sunroof, knocked itself out and landed in my lap. I freaked! The net may help next time, but I am catching a lot of bugs too.

73JPS
05-04-13, 07:06 PM
I cannot speak to how much better a solid wind deflector would work, but over all I find this sunroof to be excellent from a noise level standpoint. My recent comparators are 2003 Volvo S60 and 2010 Mazda 6, and both of those cars had noisy sunroofs I would never bother opening because the increased noise level was much worse than just annoying. This car has a very enjoyable roof.

rustybear3
05-04-13, 11:46 PM
Well, shame on Cadillac for getting the wind deflector wrong as BMW. My last 2 cars all had sunroofs and I purchased my ATS with a sunroof but the ATS wind deflector is by far the worst wind deflector in terms of appear and performance. Cadillac should consider running a Computational Fluid Dynamics (CFD) model to determine which design is best for noise/drag. CFD will not tell how long the wind deflector will last but I am sure automobile manufactures have a good idea of what their warranty cost are and how much the feature adds to the cost of the car.

Cadillac DIDN'T get the wind deflector wrong. The dynamics of the netting design is much quieter and efficient than the solid design....I and others on this forum have notice a BIG difference in a quieter noise level and little wind buffering.....even though I loved my 2008 STS , the solid wind deflector was much more noisier than this ATS model. No Evidence what-so-ever that this plastic design will last any shorter or longer than previous designs...merely speculation on some poster's part. Do you seriously think for one minute they didn't run tests on this design? seriously? I truly believe some should skip any sunroofs in the future if wind noise is such a major concern. If anything, I'm kinda disappointed that it deflects winds so much; love the wind in my hair. Can hardly wait until a convertible model comes out!

F111A
05-09-13, 09:04 PM
I do not quite understand your logic - it stands to reason that a solid metal deflector or relatively high quality plastic deflector will last longer than a cloth netting.

My other car besides the ATS has a metal deflector and its 12 years old and no problems. One cant really accurately compare wind noise from one vehicle to another since driving and wind dynamics are random and not a variable one can control, therefore one either runs a CFD model or you do testing where you fix wind velocity and determine the effect of turbulence, noise, ... etc developed.

If you want wind against your hair all you have to do is roll down the windows with or without the sun roof open.

roadpie4u
05-09-13, 10:06 PM
You guys are talking about CFD but I'm not sure you're really familiar with the basics... Long story short, if you retract the glass the drag you'll generate is higher than what the wind deflector would add - the "pop up" actually reduces drag (believe it or not).

In terms of whether a "solid" versus fabric will perform better comes with a few trade offs. Personally, I prefer the look of solid, but having been in both either is noisy as hell and i think you're all nuts.

If I want noise control I open the glass, not retract it. Second, a solid requires more roof space and weight (which would eat up interior space) and add weight to the car but cost will be roughly identical and warranty will be non-issue either way. Third, a solid deflector doesn't do as good a job keeping debris and rain out of the car for the rear seat (I can attest to that myself) by having backseat passengers get bugs and nonsense sucked in. So far the ATS's fabric one hasn't had any complaints from passengers.

Is there a solid one that would work better? Maybe. But the noise from the moonroof is still nothing compared to the windows down. I could model a solid one and 3D print it and stick it in there... But I don't think it'll help.

rustybear3
05-10-13, 06:42 AM
I do not quite understand your logic - it stands to reason that a solid metal deflector or relatively high quality plastic deflector will last longer than a cloth netting.

My other car besides the ATS has a metal deflector and its 12 years old and no problems. One cant really accurately compare wind noise from one vehicle to another since driving and wind dynamics are random and not a variable one can control, therefore one either runs a CFD model or you do testing where you fix wind velocity and determine the effect of turbulence, noise, ... etc developed.

If you want wind against your hair all you have to do is roll down the windows with or without the sun roof open.

Obviously, one can roll down the windows down...but then you get the wind buffering you from side to side and you can't hear anything; music etc. That's the beauty of a sunroof in that you can get that refreshing wind on the top of your head, with a much better noise ratio than a convertible or open windows. I just don't agree that the Cadillac net design is any less dependable or prone to failure than the so called solid design....."stands to reason" is not proof of anything other than conjecture. You yourself have said that wind noise is subjective, and there is absolutely nothing performance wise where anything is degraded. If anything, as I stated, most of us find this design quieter (as quiet as a sunroof cab be) and very efficient instead. Much ado about nothing IMHO.

M5eater
05-10-13, 08:06 AM
I do not quite understand your logic - it stands to reason that a solid metal deflector or relatively high quality plastic deflector will last longer than a cloth netting.


How long are you planning on keeping the car? 100 years?

The 56 buick that's sitting in the garage still has a lot of the orginal fabric intact. I'm betting that your sunroof netting will long outlast your desire to own the car.

Cadillac approached the car in a gram per gram situation with every single part to make the ATS as light as it is.

What your suggesting is that in your opinion, they should have went with a heavier piece of material that is psychologically pleasing to you.

I say this because so far in this thread all I've seen are opinions and unfounded accusations that this is an inferior design.

Well sir, there's psychology and then there's engineering.

73JPS
05-10-13, 02:19 PM
Well sir, there's physcology and then there's engineering.

There's also psychology ;)

M5eater
05-10-13, 03:20 PM
There's also psychology ;)

Nothing ruins a post more than bad spelling or grammerz.yo .

thebigjimsho
05-10-13, 03:30 PM
hmm...

AdamVIP
05-16-13, 02:01 PM
I got to playing around with the sunroof net on a road trip. I don't think the net is needed at all. I found it to actually be quieter when I held it down and there didn't seem to be any noticeable air flow increase into the car. Id like to try it with someone in the back seat to confirm but I think it may be best to just pull that net off all together.