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Re: GT4RS
sima:
The other option that I am still thinking is PCCB. I will probably only take the car out for a quick spin say for Sunday morning drive. Any input would be appreciated, thank you.
If money is no issue, then PCCB is nice to have, but it will not make a huge difference.
Weight difference is not so big anymore as their size has increased.
The new steel brakes on the 4RS are the same ones as on the 992 GT3. They are excellent. Bite is stronger then on 991 GT3 RS for example.
No brake dust with PCCB and if you do only sunday drives, you will never have to change the pads.
Bottom line is, both are excellent and do their job perfectly. Choice is merely about costs and preference.
Re: GT4RS
There is currently a controversial discussion about why the steel brakes in various 992 GT3 (and possibly GT4 RS) owners' cars are causing severe vibrations. Manthey and Porsche are aware of the issue. Manthey suspects that the stock brake pads leave residue on the discs, which damages both the pads and the discs. Even when switching to racing brake pads afterwards, the vibrations persist. It is believed that only the early models (MY22) are affected by this problem, but no one can confirm it.
Re: GT4RS
Gnil:Weight difference is not so big anymore as their size has increased.
The new steel brakes on the 4RS are the same ones as on the 992 GT3. They are excellent. Bite is stronger then on 991 GT3 RS for example.
The metal ones are bigger now (408mm in front) and a little thicker too, so I would think there is some meaningful weight difference. My steel rotors are wearing very well - no cracking and plenty of meat left (using gentle RE10 race pads).
When I added RE10 pads, I first scrubbed off all the old (stock) pad material with green 3M dish scrubbing pads and Simple Green cleaner. Never any vibrations (mine is an early 2022 before any updates from factory).
If someone was set of PCCB's and couldn't get them, the Surface Transforms are highly rated and easily added.
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22 GT3 Manual, 73 Carrera RS 2.9L Twin-Plug MFI Carbon Fiber replica. Former: 18 GT3 Manual, 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi, 06 EVO9 with track mods
Re: GT4RS
lexs4:They replaced the rotors on my 992 GT3 for brake vibration…haven’t had the issue yet on my 4RS.
A friend of mine also told me yesterday about vibrations in his GT4 RS. He installed the Manthey Racing brake pads after 1800 km and has since completed 50 laps on the Nürburgring Nordschleife.
Re: GT4RS
Did a track day with my oldest son in Dijon yesterday. We shared the car. It was a great day.
I still have a bit of old 911 habits when entering the curves, butI I am progressing well.
With or without WP ?
My son
there was a whole different variety of cars. The track is fast with no chicane, lots of flow.
And a very special car form the 70's, Carrera RSR with original chassis that just came out of full restauration and training and fine tuning to go next week to the Le Man classic. A crazy car. Notice the 917 wheels. Porsche just took the best of what they had to make this car.
Re: GT4RS
mcdelaug:. The trumpets and dual plug distributor are just “the business”.
Indeed. And all major parts are still the original ones.
As it was too loud to drive on that 100db sound limited track, they had to put two temporary back exhausts that unfortunately killed the HP. Weight is 900kg . Saw them dismount the center looked rims, was with a 6 feet long pole to have enough force 
Re: GT4RS
Gnil:lexs4:They replaced the rotors on my 992 GT3 for brake vibration…haven’t had the issue yet on my 4RS.
Now that you have owned your 4RS for some time, how do you rate it vs your ex GT3 ?
I prefer the 4RS over my old GT3. Primarily it's used as a road car and the 4RS shines in this area vs the GT3. Smaller, feels more nimble, and a chassis closer to its limit so don't have to go obscene speeds to enjoy.
Only been on the track with the 4RS once, but having had 911s for 14yrs I'm still adjusting my driving style to a mid-engine car. It was fun on the track, I'm sure the GT3 is the faster car. Or at least I was faster with the GT3 on the same track, but I'm really enjoying the 4RS more than I did the GT3. Only downside to the 4RS is the noise level on long highway trips, the GT3 was definitely more bearable in that case. For me it was the right decision to make the change.
Re: GT4RS
lexs4:Gnil:lexs4:They replaced the rotors on my 992 GT3 for brake vibration…haven’t had the issue yet on my 4RS.
Now that you have owned your 4RS for some time, how do you rate it vs your ex GT3 ?
I prefer the 4RS over my old GT3. Primarily it's used as a road car and the 4RS shines in this area vs the GT3. Smaller, feels more nimble, and a chassis closer to its limit so don't have to go obscene speeds to enjoy.
Only been on the track with the 4RS once, but having had 911s for 14yrs I'm still adjusting my driving style to a mid-engine car. It was fun on the track, I'm sure the GT3 is the faster car. Or at least I was faster with the GT3 on the same track, but I'm really enjoying the 4RS more than I did the GT3. Only downside to the 4RS is the noise level on long highway trips, the GT3 was definitely more bearable in that case. For me it was the right decision to make the change.
Same impressions as me on every point. I use ear plugs on long drives. Glad you enjoy the change.
Re: GT4RS
The car continues to be a lot of fun. 
I've been using the Manthey setup for a few weeks now, and although the car doesn't drive fundamentally differently than before, you can still feel an improvement in handling.
The steering has become a little sharper, and the car inspires more confidence in fast corners. However, this doesn't mean that it now drives much easier. The suspension is quite temperamental. For example, on the Nordschleife, you have to approach curbs with caution because the car reacts aggressively to uneven surfaces. I guess it doesn't rebound quickly enough. Manthey's KW suspension upgrade addresses all these weaknesses, e.g. it smooths out all the unevenness and also reduces understeer, but it's rather costly.
It is still loud...even with the helmet on
a couple of photos of my last vists in the Eifel:
Re: GT4RS
Gauss:The steering has become a little sharper, and the car inspires more confidence in fast corners. However, this doesn't mean that it now drives much easier. The suspension is quite temperamental. For example, on the Nordschleife, you have to approach curbs with caution because the car reacts aggressively to uneven surfaces. I guess it doesn't rebound quickly enough. Manthey's KW suspension upgrade addresses all these weaknesses, e.g. it smooths out all the unevenness and also reduces understeer, but it's rather costly.
Love to see you use the car as intended! 
On the suspension, I'm sure the Manthey (KW) dampers are an improvement, but I'd be surprised if they take away all the nervousness you mention. I have to believe that a large part of that is due to having McPherson struts at each corner. So when you ride the curb, you don't have the camber gain (and associated stabilization) that you have with the double-wishbone (front) and multi-link (rear) setup from the GT3 and GT3 RS.
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22 GT3 Manual, 73 Carrera RS 2.9L Twin-Plug MFI Carbon Fiber replica. Former: 18 GT3 Manual, 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi, 06 EVO9 with track mods
Re: GT4RS
Gnil:Interesting. But according to Manthey their suspension change transforms the car and, with the full MR kit, brings the car to GT3 level times.
I don’t doubt that the times are similar to GT3 - the 4RS is very fast, even stock. But the subjective behavior will remain quite different from GT3 (I’m guessing) and require a different level of skill and commitment to realize that pace.
I think the GT4 RS MR time (including MR suspension and the rest of the MR kit is about 4 seconds faster than stock, which is 10 seconds behind the GT3 on the Ring before MR). I think the MR kit for the GT3 also provides about the same benefit (4sec)
Someone on German forum mentioned to me the rumored time for GT4 RS MR is 6:40 BTG (that’s where I got the 4 second math, but maybe I’m wrong?). Comparing to new 20.8km full lap distance seemed to give a time sort of half way between GT3 and GT4 RS times…
Rumors can easily be wrong though…
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22 GT3 Manual, 73 Carrera RS 2.9L Twin-Plug MFI Carbon Fiber replica. Former: 18 GT3 Manual, 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi, 06 EVO9 with track mods
Re: GT4RS
That subjective behavior will certainly be there, but if the car with the MR suspensions becomes more calm, less bouncy, not so nervous, it will give normal drivers much more confidence.
4 s with full MR package would be disappointing. Could also be that it is 4 s for a pro and quite a bit more for amateur just because the car becomes easier when going fast on uneven track.
I do not have the numbers . They should be out soon now.
Only thing I was told by MR is that I can have the kit within 3 weeks and that it would transform the car and I would be able to stick with the GT3’s on the Ring
Re: GT4RS
Gnil:That subjective behavior will certainly be there, but if the car with the MR suspensions becomes more calm, less bouncy, not so nervous, it will give normal drivers much more confidence.
Agreed
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22 GT3 Manual, 73 Carrera RS 2.9L Twin-Plug MFI Carbon Fiber replica. Former: 18 GT3 Manual, 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi, 06 EVO9 with track mods
Re: GT4RS
Gauss:There is no official MR time yet. When they started their attempt, they had only a time window of one lap, not more. Shortly before the driver went out, it started raining, and the track was partially wet. I don't know if they will make another attempt.
Didn't they achieve 7:03 min with the kit? 
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RC (Germany) - Rennteam Editor Lamborghini Huracan Performante (2019), BMW Z4 M40i (2022), Jeep Grand Cherokee Trackhawk (2019 EU)
Re: GT4RS
BONES:7:03 with the kit official time
https://www.motor1.com/news/676730/porsche-718-cayman-gt4-rs-manthey-kit/
Better than my guess (beyond the half-way point between GT3 and GT4 RS without MR). MR kit saves 6 seconds where it only saved 4 seconds on the GT3
--22 GT3 Manual, 73 Carrera RS 2.9L Twin-Plug MFI Carbon Fiber replica. Former: 18 GT3 Manual, 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi, 06 EVO9 with track mods
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