jpcork40

Looks good, Looking forward to see it painted to match the car. What make is it?

jetson8859

Actually toying with idea of painting sides body color and either leave top seal gray or paint it classic black

rs10

So all ducktails, good or bad, spoil the aero of a stock 996? Or ... ?

Can you let us know the basis for this conclusion? I've tried finding info on the aerodynamic effect of a ducktail, but no luck.

What I do know is that the 997 sport classic is 2 km/h (or was it mph - can't remember) slower than the 997 GTS which I believe has no mechanical differences that could affect top speed, suggesting the difference is aerodynamic. But, the ducktail is not the only aerodynamic difference. There's also the bubble roof and different side sills (and bumper? again, it's been a while).

Then there's last year's 996 Classic Club Coupe. Porsche always says that if you buy different aero for one end (e.g. one of their bumpers or wings), you need to buy matching aero for the other end, or else the car will be unstable. So if, for instance, you buy an aerokit bumper, you should buy an aerokit wing. Yet here they've put an aerokit bumper on in the front, and in the rear, instead of the wing, they put a ducktail. And if I recall correctly, they tested the car in both a wind tunnel and at (very) high speed at Nardo. Since they found this combination OK, that suggests the ducktail results in less lift than the standard rear end. And the effect on drag? Who knows? One article said the car goes 190 mpg, same as the 996.2 GT3 with the same engine, suggesting the ducktail has no more drag than the GT3 wing (and therefore probably no more than a standard rear end - probably). But no source was cited, and all the other articles I saw just said Porsche says at least 180 ... .

hardtailer

Porsche offers the aero kit front with a full width lip underneath with both
-rear cup wing
-rear fixed carrera wing




The combo on the classic club aero kit front and ducktail has a lip that does not extend to the sides (see https://rennlist.com/forums/996-foru...l#post18104314) and compared to the GT3 lip only about half as high.





Lip on GT3

This means the ducktail negates rear lift less (iow provides less downforce) than either cup or fixed carrera wing as they had to add only a little lip to the front in order to achieve the aero balance between front and rear.

Cup wing will have greatest drag as the stays of the wing stick out from the side thus increasing frontal area.
Ducktail probably about the same as fixed carrera wing but more than stock retractable wing.

TheChunkNorris

Since we’re reviving a 8yr old thread, I can say it’s negligible. Having both a GT3 and RPM Technik, I haven’t noticed a difference at speed and while wringing the car out at the Dragon. I do have a GT3 bumper with a Cup style(DemonSpeed) lip. Think you should probably send Rpm Technik an email because all their CSR cars have Ducktails.

yoonietang

Since we're here, can anyone recommend a a ducktail for an NB 996? The RSR is great but a little pricey for me.

rs10

Very interesting! I had no idea such a Carrera wing is (was?) available from Porsche, nor the matching lip spoiler. Not sure it beats a ducktail for looks (though it's pretty hard to see what it looks like). But I don't really care, and they at least claim aerodynamic benefits. (Drag? lift? Given the need to add the front spoiler, probably at least lift). They've never claimed that for a ducktail (on a modern Porsche). (Or have I missed something??? They offer ducktails for 991s and, I think, 992s. I think I've seen their descriptive text for the 991 version. I even contacted a dealer pretending to own a 991 and asked about the aero impact. They were unable to find out.)

I guess the silver wing is the same as the wing on the blue car? And the same side skirts are used whether with the cup aerokit or the carrera wing and lip spoiler?

Actually, I copied this image and enlarged it, but the image quality is such that it makes it hard to make out the part numbers or the model references (e.g. "post ...models", or "models from ..."). Is there any way you could post a larger or higher quality image?

Thanks!

rs10

Hi, could you clarify this a bit for those of us who are easily confused? For instance, if "it's negligible", what's "it"? And you've had both a GT3 and RPM rear aero, or whole aerokit, or ... ? Or put another way, when you say you haven't noticed a difference, that's a difference between what car (or aero setup) and what car/setup? And difference refers to top speed, or lift, or ... ?

Also - sorry if it's a silly question - but what's the Dragon and how fast do you get there? (I rarely track my car - I have something else for that - but I do drive on Autobahns. And while I can't in any way explain why this should matter, it would nonetheless greatly annoy me if putting a wing or ducktail on my car reduced the top speed by even a single kmph.)

P.S. I have already been in touch with RPM. They have never tested their ducktail. No one has tested a ducktail. Except Porsche. One of the few things that annoy me about their relationship with customers is that they force us all to do all this generally imperfect research and speculation when they could just share what they know.

SoCal911t

There's one on Ebay right now. Ebay Carrera wing
And here's the part list.









And some shots of it on my car.















And the two pieces that make up the wing.

De Jeeper

I highly doubt a ducktail or any factory-ish wing would significantly limit top.speed. U really need to get the wing up to do so. Its really about matching the front aero to the rear so the front does not lift. A good splitter would take care of the lift issue over 120mph.

The repro cup wing on my car limits my top end to about 133mph on the track with my gt3 motor. It requires more torque to overcome the drag on the straights. On the autobon with more miles to gain speed im sure i coould get the car faster.

Also the dragon is the Tail of the Dragon, a road in TN. Its twists and turns but is way too low speed for any of this aero to effect handling.

Cup wing.......also dive plains, rsr center rad chimney and cup spliter to balance the front.

GC996

Always liked the look of the Carerra wing.

damage98MO

Man she's looking sweet!

TheChunkNorris

RPM Technik but I’m biased.







There were a couple stretches on the Skyway that put us around “going to jail speeds”. I will concede that I do not have definite facts and really observations at highway speeds. Like DeJeeper said, either option doesn’t increase drag like a bigger wing would.

imhighlander

Go big, or go home.

Your spoiler needs a spoiler.
Biggest effing spoiler...

yoonietang

The RPM Technik is 100% the one I'd buy if I had the money but it's more than double everything else I've seen. Absolutely gorgeous though.