GT4 RS breaks cover then.....

GT4 RS breaks cover then.....

Author
Discussion

Romo

239 posts

93 months

Sunday 8th May
quotequote all
718GT4RS said:
Who here actually has an allocation for GT4RS?
^ I have

That's why I turned in my M2CS and 718 GT4

ETA 2023 because of al the deliverance troubles



On unstable driving feelingGT4 an Spyder.

A friend of mine had a 718 Spyder, another friend a 991.2 GT3, I my 718 GT4. On the BAB both the Spyder and I suffered the same unstable road behavior, Very unpleasant and unsafe feeling. to both of us. We discussed the matter later on, both believing the rear end is not the same quality as the 911 ones. I later on found that Rennlist had numerous discussions on the same problem.

The GT3 had no issues, a whole different rear axle set up of course.

Edited by Romo on Sunday 8th May 12:43


Edited by Romo on Sunday 8th May 12:44

718GT4RS

88 posts

83 months

Sunday 8th May
quotequote all
Romo said:
718GT4RS said:
Who here actually has an allocation for GT4RS?
^ I have

That's why I turned in my M2CS and 718 GT4

ETA 2023 because of al the deliverance troubles



On unstable driving feelingGT4 an Spyder.

A friend of mine had a 718 Spyder, another friend a 991.2 GT3, I my 718 GT4. On the BAB both the Spyder and I suffered the same unstable road behavior, Very unpleasant and unsafe feeling. to both of us. We discussed the matter later on, both believing the rear end is not the same quality as the 911 ones. I later on found that Rennlist had numerous discussions on the same problem.

The GT3 had no issues, a whole different rear axle set up of course.

Edited by Romo on Sunday 8th May 12:43


Edited by Romo on Sunday 8th May 12:44
Congrats.. nice ‘consolidation’ of cars there smile
I don’t think many (if any) with be MY2022 cars, so I expect we’ll start to see deliveries late Q3 and pickup significantly in 2023



rkwm1

908 posts

79 months

Monday 9th May
quotequote all
Configurator now allows you to select and see the full range of PTS colours available. smile

Fish Silver from the GT3T Australia is now available!

RacerMike

3,415 posts

188 months

Monday 9th May
quotequote all
bigmowley said:
I don’t think anyone has ever driven the car and said the same… reminds me of someone on here who thought there was a “handling issue” because they clattered a kerb at the ring, at a point where you get air. Err yep, you will experience fishtailing if you smack a kerb at the same time the road falls away from you

Oh that was me cheeky. To be fair It was in a Spyder and not a GT4 but still geo optimized with rear arms changed. However that was not the only occasion that that particular car gave me a big scare on track. I am also far from a driving god like yourself clearly.

My beef with the chassis of that car was that it was quite unforgiving at the rear at or over the limit of grip. I certainly would not describe it as “loose” just a bit of a handful sometimes. An issue that I never had with my 981 GT4 on track which I thought was superb.
I can throw my R8 track car around with far more confidence than I ever could with that Spyder. Including kerb hopping!
Just my experience of one particular car.

Still hopeful than a 4RS might eventually come my way so that I can experiment some more with the Cayster platform. I am “on the list” should Porsche actually build any rolleyes
Not just you Bigmoley. The kinematics of all Caymans are heavily compromised by being a strut. They have lots of undesirable on limit geometry under load....especially when there's a load change due to a bump. You can go some way to fixing it by stopping the rear suspension from moving. In other words, if you ramp the compression damping up a lot and then stick a tonne of static camber on the rear end then you push the point at which it does weird things higher and higher. This is exactly how the Cayman GT4 race cars are set up, and is also why going stiffer on the rear bar (which would normally make oversteer worse) helps things a little bit.

I took my 981 to Croft yesterday to do the Javelin Sprint (amusingly I got removed from the results for an as yet to be clarified reason....but it would appear to be because I had to go home before the prize giving and someone complained I turned up in a Porsche or something) and you can see the issues in the higher speed corners. I'd probably describe the lap as 'stressful' laugh



It amused me a little when a few micro analysed the official 4RS lap record at the Ring and seemed to think that a 'better' driver would find a few seconds extra without really understanding the way in which the Cayman is compromised....but then that's what the YouTube comments section on driving videos is for right? Keyboard co drivers who could do it better!

freedman

4,563 posts

184 months

Monday 9th May
quotequote all
RacerMike said:
I took my 981 to Croft yesterday to do the Javelin Sprint (amusingly I got removed from the results for an as yet to be clarified reason....but it would appear to be because I had to go home before the prize giving and someone complained I turned up in a Porsche or something) and you can see the issues in the higher speed corners. I'd probably describe the lap as 'stressful' laugh
What did they say about Jonny Cocker and the 992 turbo S then!

RacerMike

3,415 posts

188 months

Monday 9th May
quotequote all
freedman said:
RacerMike said:
I took my 981 to Croft yesterday to do the Javelin Sprint (amusingly I got removed from the results for an as yet to be clarified reason....but it would appear to be because I had to go home before the prize giving and someone complained I turned up in a Porsche or something) and you can see the issues in the higher speed corners. I'd probably describe the lap as 'stressful' laugh
What did they say about Jonny Cocker and the 992 turbo S then!
Well. GT2 RS rather than the turbo. He swapped the other week.

They’ve not really responded further than to say it’s because we left early. Which I did last year as well since it was quite a drive back. Not really sure what their thinking was but feels a bit petty.

freedman

4,563 posts

184 months

Monday 9th May
quotequote all
RacerMike said:
Well. GT2 RS rather than the turbo. He swapped the other week.

They’ve not really responded further than to say it’s because we left early. Which I did last year as well since it was quite a drive back. Not really sure what their thinking was but feels a bit petty.
Worse than Petty, not sure why yo have to be there at the death to have your results registered

In the MSA sprints I've done, I don't think I've ever stayed for the prize giving, but have always been declared in the results

RacerMike

3,415 posts

188 months

Monday 9th May
quotequote all
freedman said:
RacerMike said:
Well. GT2 RS rather than the turbo. He swapped the other week.

They’ve not really responded further than to say it’s because we left early. Which I did last year as well since it was quite a drive back. Not really sure what their thinking was but feels a bit petty.
Worse than Petty, not sure why yo have to be there at the death to have your results registered

In the MSA sprints I've done, I don't think I've ever stayed for the prize giving, but have always been declared in the results
Well exactly. I'm trying to give them the benefit of the doubt, but genuinely just feels like someone complained, so they removed us from the classes we were in so they could win instead! Although to be fair to the guy who'd have got the win in the class I was in as a result of my 'removal', I spoke to him in the morning and he seemed sound so I'd be surprised if he complained.

Also seems like the truth gets in the way of a good excuse too. Jonny's practice and 3 runs (1 the timing didn't work) turns into 2 runs and a burnout to show off his company....

Dr S

4,823 posts

203 months

Monday 9th May
quotequote all
They Cayman's stock chassis is the issue. If you lower the car for proper track work, geo goes out of whack. Under breaking and hard cornering you will feel the nose dive which corrupts geo and the car understeers (under braking it cannot use the rears sufficiently). It's something you have to work around by applying Rob Wilson's technique of making small initial (steering and braking) inputs to prep the chassis and reduce lateral roll

RacerMike

3,415 posts

188 months

Monday 9th May
quotequote all
Dr S said:
They Cayman's stock chassis is the issue. If you lower the car for proper track work, geo goes out of whack. Under breaking and hard cornering you will feel the nose dive which corrupts geo and the car understeers (under braking it cannot use the rears sufficiently). It's something you have to work around by applying Rob Wilson's technique of making small initial (steering and braking) inputs to prep the chassis and reduce lateral roll
The product page for the Autoquest Independent Rear Suspension kit for the GT4 does a good job of explaining this all:

https://www.autoquestcars.com/custom-09

The roll centre and toe change are the two biggest factors which combine to give the instability during cornering. It would be interesting to try and kit really, as if it made it anything like a GT3 or GT3 RS it would transform the car. The 3RS on track feels incredible and far more confidence inspiring.

av185

15,897 posts

104 months

Friday 13th May
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718 Spyder RS been spotted testing.

Twinfan

9,211 posts

81 months

Friday 13th May
quotequote all

av185

15,897 posts

104 months

Friday 13th May
quotequote all
Haha sorry T been away.

kmpowell

2,310 posts

205 months

Friday 13th May
quotequote all
The first customer cars are starting to trickle through...

https://rennlist.com/forums/718-gts-4-0-gt4-gt4rs-...

julian987R

3,361 posts

36 months

Friday 13th May
quotequote all
kmpowell said:
The first customer cars are starting to trickle through...

https://rennlist.com/forums/718-gts-4-0-gt4-gt4rs-...
Interesting to see it with normal, non-stylised moody photos. That racetex all over the dash i think actually looks horrendous.


Twinfan

9,211 posts

81 months

Friday 13th May
quotequote all
Shows you we all like different things.

Looking at the photos, that was the only thing I was envious of biggrin

TDT

3,548 posts

96 months

Friday 13th May
quotequote all
The engine/gearbox combo & race-tex dash are the only things I want from this car.

Although mag wheels are quite nice also.

PGNSagaris

2,659 posts

143 months

Friday 13th May
quotequote all
TDT said:
The engine/gearbox combo & race-tex dash are the only things I want from this car.

Although mag wheels are quite nice also.
Agree with this fully

Twinfan

9,211 posts

81 months

Friday 13th May
quotequote all
The engine would be nice too, sure, but I'd need a manual box for it... driving

TDT

3,548 posts

96 months

Saturday 14th May
quotequote all
My albeit limited experience with this engine is that manual is nice for pottering around, have some fun or on the road, but as soon as you want to REALLY unleash the performance, with serious intent.. PDK allows you to do that more effectively.
Not because of the power, but because if the sharpness, response and sound… it’s optimised with PDK.

But good that there are choices, across the various models it has become available in.

Edited by TDT on Saturday 14th May 10:31