IRunalot

Cabon Fiber in Primer, take my money.

On a serious note Any considerations for the air flow to the intercoolers? Since we are no longer raising the "wing" are their any ducts that can be cut into the base to allow more airflow to the intercoolers?

I love the look of it and can't wait to see the final product.

4 Point 0

They can be, whatever we design them to be.

I want one for downforce and to scoop extra air.

I fully understand others just want the look, when in fact they will restrict air and perform worse than stock. I’m not interested in that at all.

Its very easy for someone to build in a wider mouth at entry to scoop more air, and then extend them out into the clean airflow to create downforce or drag.

With TiAL M800 turbo’s drag is of great benefit. It was a negative to 200hp n/a cars. Its of great benefit to 800+ hp turbo cars.

Valvefloat991

The ducktail was invented to reduce lift, not to reduce drag. According to Paul Frere's Porsche 911 Story, adding the ducktail to the Carrera RS did reduce drag slightly from 0.409 to .397. But the big contribution was to reduce rear lift from 320 to 92 pounds at 152 mph. It also moved the aerodynamic center of pressure six inches rearward, which reduced the car's sensitivity to sidewinds.

4 Point 0

All great stuff. But this is 2024. Technology has gone ahead leaps and bounds. Surely we can have a custom duck tail that does it all. Produces decent downforce, and increases air flow. It would be nice to have serious downforce without a ridiculously large wing.

I know journalists bang on about the next generation has doubled the downforce without increasing drag, really who cares. Increase drag. These cars has massive power, a little drag will not slow them done. Wind up the downforce, care less about added drag, and screw up the boost.
Looks and Power and Performance. Instead of being a poseur with a car starved from cooling air and no downforce.

IRunalot

I'm happy with reduced lift and some better intercooler airflow. This should work well with simialr aero as @4 Point 0 . I just DO NOTt want a giant wing, I really enjoy a car that is not obviously fast. Moving the center of pressure back is great with the GT3 front and Verus splitter.

My aero work starts ~Q1 so hurry up with this.

mcomet

I am researching posts as I am looking for a ducktail for 991.2 gts and it is sad how many posts there are with no real solutions. Seems like there is a market there. Does anyone know if a .1 would fit a .2 gts ? Talking to someone at Werks Reunion this past weekend they had done a custom job to make a .1 work but it sounded expensive and time consuming. I can't believe there are no proper aftermarket ducktails for a .2 available. At least kudos to the OP for making a proper looking setup. Looks great.

IRunalot

I'm right there with you!

The big issue is the intercooler airflow that is under the wing. No one wants to actually engineer anything just tack on solutions for the .2 cars. Really frustrating.

The solution shown earlier will work if you can get the airflow to the intercoolers.

supercroc

Airflow to the intercoolers was my primary concern. I took inspiration from the way Porsche has handled this with the 992 (confirming my first inclination) and had the leading edge of the Ducktail raised to provide an air channel to the intercooler inlets. I put thermocouples in the intake tract and have recorded temp drop across the intercoolers in various load conditions. Hope to be doing testing of first unit in Oct.

Joe

IRunalot

That sounds great and thank you for that detail. This is the first 991.2 ducktail that offers cooling and eliminates that horrid (my opinion, yes some love it but not I) movable wing.

I hope you get this to market soon! I'm a buyer!