TXshaggy

From the Porsche Press release:

Highly efficient: the fixed rear wing with a swan-neck attachment

The new, fixed rear wing with a swan neck mounts and aluminum supports represents a marked difference to other 718 models, including the GT4. This particularly efficient wing designed was adopted from the Porsche 911 RSR race car and was first used on a Porsche road car on the 2022 911 GT3. Combined with a ride height that is 30 millimeters lower than a standard Cayman, front wheel well ventilation, an aerodynamically optimized underbody with a rear diffusor, an adjustable front diffusor and a new front spoiler lip with flow-around side-blades, the GT4 RS generates up to 25 percent more downforce in the racetrack-only Performance mode than the 718 Cayman GT4.


I’d take the press release over IG or Porsche’s marketing magazine…more eyes looked at the press release

Ksdaoski

25% more than GT4 and 60% more than 718 Cayman?

hahaleung

Seems like 60% difference just compare the rear wing and 25% for the whole package. That means there is not much different on the other aero parts compare to the GT4.

very green R

This was discussed in the Top Gear video by AP.
Re:
1) AP said there is a little bit of Ram effect but it doesn't make much difference. Jack asked AP if there is more power due to the air scoop of the WP but AP ignored Jack's question about more power and kept talking.
2) I think AP said the WP makes the sound better but he also said it makes the sound louder. The reason AP's statement is not clear to me (after reviewing the video statement 10 times) is that I am not sure if he is talking about the fact that the WP adds the outside air scoop in cf and also the interior air ducts and air filter box cover all in cf. AP talks about the air scoop adding a chamber so perhaps the air scoop makes the sound better and louder, or I am guessing the cf interior air ducts and air box cover being in cf makes these parts stiffer and reduces some unwanted resonance sound from the non WP plastic parts flexing during intake pulses. I am unclear on this so if you desire please watch the Top Gear video and tell us what you think. Time stamp 15:45
I really hope that Porsche will let journalists drive both the WP and non WP cars so we can know the exact differences before ordering..

very green R

There is a brief view of the CXX painted hood stripe on a WP front hood in this Porsche (I assume B roll) video at the 7:15 time stamp.

ExMB

That stripe appears all over posts on here. Please search.

lovetoturn

I think they are sand bagging on the aero of the GT4 RS. The stock GT4 has about 330-340 pounds of downforce depending what source you want to believe. The GT3 .1 has about 320 pounds, and the .2 has about 350 pounds. The GT4 has about 250 pounds of downforce on the low setting so about 80 pounds less than the sport setting. That equates to adding about 50 pounds more in the rear for raising the wing from 1 to 4 degrees and another 30 pounds in front for opening the front diffusers. I have already raised my wing to 7 degrees in the rear and added additional air guides underneath the car just behind the front tires like we see in the GT3, the Manthey GT4, and the GT4 RS once we see the bottom of the car. So lets be conservative and add only 20 pounds for that, so that gives us 330+50+20 = 400 pounds of downforce on a modified GT4. Already a 21% increase. I am sure the Manthey car with a modified rear wing like I have, plus a gurney flap, and additional front rake has even more downforce in the range of say 425 pounds.

When Porsche jumped from the GT3 to the GT3RS the downforce went from 320 to 728 (+227%) for the .1 RS, and 350 to 992 (+283%) for the .2 RS. It would appear after looking at all of the upgrades on the GT4 RS, that the total increase in downforce should be a bunch more than just 20-25%. We are talking about a top mounted club sport wing, a larger front spoiler, hood mounted brake ducts, front wheel air guides, upgraded side fender air guides, and of course the infamous fender vents. I would venture to say that this all adds more like 200+ pounds of downforce or that 60% number we see in that article.

Look at the new 992 GT3. It goes from 350 to 770 pounds of downforce (+220%). It achieves this with a better front spoiler, more front wheel air guides, and a better radiator venting system...but no fender vents or hood brake ducts. The rear of the car has a similar sized rear wing as the GT4 RS and an improved diffuser, which all of this adds is stated to add 420 pounds of downforce to the car. Seems like similar upgrades and one car is supposed to have just 80 pounds of increased downforce while the other one has 420 pounds....I don't think so. Physics is physics. Why would Porsche go to all the trouble to give the car all of these upgrades for a 20% bump in downforce when it has given the previous two GT3 RSs way more than a 200% increase in downforce. Manthey and I already have this 20% with upgrades to our regular GT4s. I would bet the GT4 RS has in excess of 500 pounds of downforce at the usual stated speed of 300 kph or 186 mph. That seems much more Porsche RS like. Plus, look at how fast the car is on the Ring. Quite comparable to the new GT3. The downforce numbers have to be more similar than this alleged 20-25% bump.

The wing alone probably has well over an additional 100 pounds of downforce by itself, as do the similar aftermarket ones from various vendors that we have here on the forum. Is it even the same wing as on the GT3 as some may have alluded to in their reviews. Then adding all those GT3 RS type front upgrades, and it's only supposed to add maybe just another 20-30 pounds of additional downforce???? That does not make any sense to me. Remember, just pulling out the diffuser blocks on a stock GT4 adds 30 pounds of downforce to the front. So doing no less than five additional individual upgrades on the front to the car has got to add more substantial front downforce of maybe like 50-100 pounds. Why else would Porsche make so many upgrades. Again I think the GT4 RS has 500+ pounds of downforce.

At any rate, I have done a little homework on this subject and presented some thoughts here that make sense to me. Sorry for the ramble. Something for everyone to chew on as they see fit. For reference here are some reported values for the downforce of various GT cars at approximately 300kph or 186 mph. Some are directly from Porsche and others from the internet or magazines.

220...... 981 GT4 (@183 mph)
330?.... 982 GT4 (50% more than the 981)
??? ......GT4 RS (various sources say between 20-60% over the regular GT4)
320 ......GT3.1
350 ......GT3.2
728 ......GT3 RS.1
992 ......GT3 RS.2
770...... GT3 992

raymort

I sure hope they are sandbagging the 4RS!!!

Ted in Rochester

The Club Sport (CS) variant does not have the protruding intake of the WP. That tells me that no additional hp is afforded by the WP intake. Additionally, the factory is not claiming a weight savings with the WP and once again, no WP stuff on the CS race car. My conclusion is that the WP is cosmetic only.

raymort

Yeah-it looks cool tho…

Diablo Dude

Much of the black plastic on the GT4RS bugs me.
And I would tend to agree with Archimedes... who has pointed this out on several occasions.
I've inquired about whether or not the fender vents in CF would be a Porsche Exclusive option, but have not heard back from Mr. Mauney from Porsche Exclusive on the West Coast.

smegman

you could probably wrap all the intake stuff in carbon fiber vinyl wrap look a like and save yourself 15k lol

raymort

The WP does appear to just be a PAG ADM in disguise…

Mdiesel64

Agree, but per the configurator it's the only way to get PTS unfortunately, which is a bummer.

All that extra cost for paint just to cover it up with CF....Unless of course you spend more to have more panels painted via CXX.

RADONCulous

^also not of fan of having to order the full alcantara / leather interior for the WP...