Marv.Frazier

my 09 wing recently became uneven R to L. As much as I love the functionality of the wing I took it to a local custom P shop and they fixed the wing in a raised position approx 1.5in above the base setting. They removed the pump, drained the system to prevent future leaks and set the code to a fixed wing GT2 so i do not get any warnings. car looks good and I have some room to clean under the wing. Total cost ~$450.

996AE

Very very important above 100 mph on the track

For street driving no issue

go wingless

RennKit-Dave

o7silverturbo

Just get the ebwerks set up for your rear wing. It keeps the factory wing but its fixed and has twelve different height sittings

http://ebwerks.com/models-996997.html

autobonrun

I would be very hesitant to modify the factory aerodynamics on a car capable of nearly 200 mph. I know you say 150 mph, but I personally noticed a reduction in the effect of my steering input at 120 mph before I added spoilers to the rear and front of my SC. Maybe if one is limited to drives to Cars and Coffee, it's no issue, but I've found with 30 years of Porsche ownership their engineers do very little that is not for some functional reason. You can bet if the airfoil rises at 75 mph, somewhere there's an engineering calculation to support this speed, although I would be the first to say this is most likely over conservative. Unlike other manufacturers today that throw huge air inlets, quad exhausts, spoilers and fake red brake calipers on their 110 HP four cylinder for marketing reasons, Porsche does most of its designs due to need. The profile of the 911 has basically remained unchanged for over 50 years, and it basically looks like an airplane wing, flat underneath and sloped on the top so it's basic shape is going to create lift.

I think as the speeds of 911's continued to rise, just reducing lift using the spoiler was not enough and they had to go to the airfoil that rises at 75 mph. If you really look at the design of the top portion, the airfoil, it's an inverted airplane wing. Thick at the front, thin at the rear, flat on top and sloping underneath. I actually took the time to look at the shape of the raised portion (really bored one day). So instead of creating lift as is the case with an airplane, it produces downforce. Even the tips are turned downward on the Porsche airfoil, just like the tips of modern airplane wings are turned up to make the wing more efficient. The tips reduce the amount of air from vortices from spilling back over and hurting the lift; or for the Porsche, from reducing available downforce.

Nice view of the wing design here:
https://www.bing.com/images/search?q...lift&FORM=IGRE

You also might find this tech discussion interesting. It's an old discussion on even older Porsches, but I found the technical discussion and photos starting around post #13 pretty good. Again the basic shape is unchanged, meaning so are the physics that underly the design. On the older Porsches, we even got into discussion of the impact of the rear spoiler on engine temperature, back when they were air cooled. Not nearly the issue with the water cooled engines if at all.
http://forums.pelicanparts.com/porsc...irst-then.html

These are definitely just my opinions, I'm an EE and by no means an aerodynamics engineer.

RennKit-Dave

Good stuff! A bit more about the turbo wing evolution HERE.

JG 996T

Interesting that cab wing extends higher to achieve same level of downforce.

autobonrun

That's a good writeup; I learned something new. I never realized the 996TT wing extended 1" higher than the 997TT's wing or that the 997 wing is 23% larger and produced triple the downforce.

Also, I had not looked at that old Pelican writeup for about 8 years. I recalled that discussion so I attached it. It's striking how the bottom portion of the spoiler/airfoil setup on the 996/997 turbos is so similar to the duck tail of the earlier Porsches. They just added the airfoil for additional downforce.

I think what the OP would like is a 993 style operation for a TT, but I'm sure it's nowwhere as functional as the current TT design. It's functional while maintaing the classic 911 lines most of the time. On the other hand, the 993 doesn't have the same top end potential as a 997TT so it doesn't have to be as efficient.
https://www.bing.com/videos/search?q...0BE3&FORM=VIRE

autobonrun

Agree. I never new that.

German_Saint

I like the aero kit factory wings. I believe the factory wing increased downforce by 120 lbs

993MAN

I just like pushing the button on mine and watching it go up and down in the side mirrors.

It's a Turbo wing, and Turbo's need it, because it's a Turbo.

atcbi5

Ed99

Curious to know if any other TT owners has removed the wing and replaced with a Duck tail? I also think the wing ruins the beautiful hips from the rear angle and the shape of the rear.

rsalicrup

http://mashaw.biz/Ducktail997Sport.asp

I like the ducktail on 997s. I think it flows well with the wide hips. Would I do it? Not for the look I’m going.

Ruskiy

Is there a fixed wing kit out there, if the system failed and you just don't want to deal with it? Where it raises the wing a little like poster's above, and let it be once coded out.

Edit: I answered my own question, just buy Rennkit extenders:
https://rennkit.com/product-info/997turbo/