Cayman GT4: Where are we up to now?
- Thread starter Motorhead
- Start date
Well done for eating humble pie D.
A bit of a no-brainer for Porsche really - having introduced the manual 'box on the 911R - silencing the critics of the 991.1 GT3 and increasing the desirability of the updated car. The only problem will, as usual, be meeting demand.
I very much doubt that we'll be hearing anything about a revised Cayman GT4 this year, but having got the GT3 up and running and with the GT2 rumoured to be at an advanced stage of development, AP and his team could soon be turning their attention to the next Cayman project.
Jeff
A bit of a no-brainer for Porsche really - having introduced the manual 'box on the 911R - silencing the critics of the 991.1 GT3 and increasing the desirability of the updated car. The only problem will, as usual, be meeting demand.
I very much doubt that we'll be hearing anything about a revised Cayman GT4 this year, but having got the GT3 up and running and with the GT2 rumoured to be at an advanced stage of development, AP and his team could soon be turning their attention to the next Cayman project.
Jeff
I may have missed it but i don't recall mention of people altering the ARB settings. What have people tried; fully hard rear and soften up the front? Incidentally I am not inclined to make any more alterations beyond these tweaks. As usual, any sensible suggestions appreciated.
For me this is just a fine tuning of car to driving style ...
As it came seems to work fine for me ... mid ARB setting front and back ... but I am working on more negative camber to reduce the shoulder wear of my tyres and I'm fitting KW 3 way adjustable dampers to get the most from the chassis ... all as a single package with Manthey set-up for semi-slicks on the ring ... and reversible come sale time if required. No power mods ...
My 964N-GT was the same --- new Cup front dampers and RS rears made the car much more feel-some yet balanced --- at a time when many said theirs cars were trying to bounce them off the road ----
We shall see --- the journey continues
As it came seems to work fine for me ... mid ARB setting front and back ... but I am working on more negative camber to reduce the shoulder wear of my tyres and I'm fitting KW 3 way adjustable dampers to get the most from the chassis ... all as a single package with Manthey set-up for semi-slicks on the ring ... and reversible come sale time if required. No power mods ...
My 964N-GT was the same --- new Cup front dampers and RS rears made the car much more feel-some yet balanced --- at a time when many said theirs cars were trying to bounce them off the road ----
We shall see --- the journey continues
MrDemon said:ok so red faced, there was a manual GT3 badged car !
Looks amazing, cannot bode well for gen 1 GT3 991 prices.
There's no red face in a good guess ... it will be very interesting to see what the split is between manual and PDK once cars are delivered.
I think this looks very very nice ... 'love the sound of the engine developments, and can't wait to see that engine in a GT4RS ...
Thanks Chris, see you on Friday, I hope
Wow ... Mr D eating humble pie - theres one to remember Lol ... What a car ... 4.0L & Manual Transmission - basically a hard core roll caged 911R - OPC called me for £10k deposit at 11am and the configurator is available this morning "Paradise" ... Incredible finance options also, so will keep GT4 just in case scenario
I still think the manual was a last minute option, you cannot order a manual till Sept and no press cars or the show car is manual and that's the main change so you would think they would have a manual car !
even the online order system shows no manual, so that really does say it was last minute imo and the first 200 odd cars will be PDK only.
I did have insider info and that was to be 2 cars !!! with I was told no GT3 badged manual at the show, which is sort of correct, there is no manual GT3 car at the show !!!
I even bet on it on rennlist and lost and paid some money to a charity
as for the GT4 ARB, it's a journey as the GT4 is not quite up to it out the box, Chris did very well in a stock car, but now a total swing to more camber and full Manthey set up ! very nice, get the Manthey wheels also yummy
I have taken things slow, playing with ARB and while ARB rear hard is a tweak and works at 80% drive over 80% and it becomes a bit twitchy , so I have gone back to middle , middle with a new geo and after market rear monoball adjustable toe links, I now run -2.2 up front and -1.8 at the rear with no front toe in, this is good , but still not quite there, I think a DSC controller might work allowing the stiffness to hit 100% max the PASM only hits 80% max and is very limited. The DSC unit can move the stiffness far higher and react to stop dive and roll far more than PASM limits can and seems a great active unit which is plug and play in 3 minutes.
it also goes softer than PASM so road use is said to be even smoother a win win for £1k and not having to twist 3 lots of bump and rebound under the car I am hoping a DSC unit will do what I need to happen.
I am also fitting 8cm higher wing risers as again it seems proven to work better higher and it looks cooler and will get some OZ wheels with PS4S road tyres and a extra sticker kit arrived today for a new look.
I have asked for a GT3 but I have no answer , it seems slim hence the planned extra GT4 upgrades.
even the online order system shows no manual, so that really does say it was last minute imo and the first 200 odd cars will be PDK only.
I did have insider info and that was to be 2 cars !!! with I was told no GT3 badged manual at the show, which is sort of correct, there is no manual GT3 car at the show !!!
I even bet on it on rennlist and lost and paid some money to a charity
as for the GT4 ARB, it's a journey as the GT4 is not quite up to it out the box, Chris did very well in a stock car, but now a total swing to more camber and full Manthey set up ! very nice, get the Manthey wheels also yummy
I have taken things slow, playing with ARB and while ARB rear hard is a tweak and works at 80% drive over 80% and it becomes a bit twitchy , so I have gone back to middle , middle with a new geo and after market rear monoball adjustable toe links, I now run -2.2 up front and -1.8 at the rear with no front toe in, this is good , but still not quite there, I think a DSC controller might work allowing the stiffness to hit 100% max the PASM only hits 80% max and is very limited. The DSC unit can move the stiffness far higher and react to stop dive and roll far more than PASM limits can and seems a great active unit which is plug and play in 3 minutes.
it also goes softer than PASM so road use is said to be even smoother a win win for £1k and not having to twist 3 lots of bump and rebound under the car
I am hoping a DSC unit will do what I need to happen.I am also fitting 8cm higher wing risers as again it seems proven to work better higher and it looks cooler
and will get some OZ wheels with PS4S road tyres and a extra sticker kit arrived today for a new look.I have asked for a GT3 but I have no answer , it seems slim hence the planned extra GT4 upgrades.
Swapping the PASM box out for the DSC is in theory easy but it's a bitch to disconnect the two multi-contact connectors the first few times around because they are very stiff.
It is easy to change maps with the DSC box in situ if you leave a USB cable permanently attached. I'm building a softer map for wet track days, based on modified dry settings so will be able to change over maps in a few minutes.
Chris Franklin has taken on DSC as a product/solution after we had a useful play with it on my car at Silverstone, so he will be building a good amount of accumulated knowledge on set up.
A GT4 owner who does 20 or more track days a year found 4 seconds round Silverstone (down to 2:22) which he attributed to a set of changes to his car which included a DSC box and TPC's offset rear toe control arm. Chris F thinks the improvement is mostly down to DSC, reckoning the change in toe over the range of vertical movement is inconsequential.
It is easy to change maps with the DSC box in situ if you leave a USB cable permanently attached. I'm building a softer map for wet track days, based on modified dry settings so will be able to change over maps in a few minutes.
Chris Franklin has taken on DSC as a product/solution after we had a useful play with it on my car at Silverstone, so he will be building a good amount of accumulated knowledge on set up.
A GT4 owner who does 20 or more track days a year found 4 seconds round Silverstone (down to 2:22) which he attributed to a set of changes to his car which included a DSC box and TPC's offset rear toe control arm. Chris F thinks the improvement is mostly down to DSC, reckoning the change in toe over the range of vertical movement is inconsequential.
Thanks Chris/ MrD. The twitchiness that you mention is possibly what could be seen on the early videos, such as Evo and Chris Harris, who, from memory, went soft front and hard rear; when the car lets-go it did so big-time, not so much a drift but a complete temporary loss of grip that they seemed skilled enough to plan so that grip was re-gained at the final exit point of whichever corner they were on (Portimaou).
At least you've tried it, I'll stick to middle/middle, then. For now.
At least you've tried it, I'll stick to middle/middle, then. For now.
I like rear hard on the road as it happens on a stock geo, but after a much much better geo rear hard was not needed, the issue with geo is the GT4 cannot be adjusted until you fit after market rear toe links, so all the adjustments you get oem is pointless as the rear is fixed ! it may well have a GT3 front end but if they fix the rear you cannot adjust the front any way !
cheap and easy fix, but many don't like non oem parts on their cars.
cheap and easy fix, but many don't like non oem parts on their cars.
I can't imagine that the germans do anything at the last minute but the config does make it look that way ...! It will be interesting what the PDK/Manual split is - i think the PDK will be more popular than people think and a 50/50 split ... In my modest & humble opinion there will be two kinds of GT3 ...!
1) PDK / Ceramics / LWB / Clubsport - then basic spec £120k for the Track guys
2) Manual / Steels / Folding Racing seat / Leather pack etc for the Tourer and sunday morning blaster ... £118k
Then £130k for the over specced cars ....
1) PDK / Ceramics / LWB / Clubsport - then basic spec £120k for the Track guys
2) Manual / Steels / Folding Racing seat / Leather pack etc for the Tourer and sunday morning blaster ... £118k
Then £130k for the over specced cars ....
My spec is £134k it's not over speced, it's a nice speced car like my GT4 is. I hate buying new £100k cars and not having stuff a £15k run of the mill car has.
why skimp when you know the car is worth more than you paid ! plus nice spec cars are very easy to sell, so a win win.
I want to cut down the amount of cars I own as TAX, insurance and service costs seem to be getting out of hand, I want to go back to 2 cars to make life easier.
why skimp when you know the car is worth more than you paid ! plus nice spec cars are very easy to sell, so a win win.
I want to cut down the amount of cars I own as TAX, insurance and service costs seem to be getting out of hand, I want to go back to 2 cars to make life easier.
Brian_Innes
Member
I'm very envious of you guys tweaking the suspension geo and ARB settings on your GT4's. Unfortunately I never got the opportunity to buy a GT4 despite having bought 3 Caymans from the same OPC. When I asked I was told, "You can't get one". I refused to pay the inflated speculator prices that followed.
As a motorsport veteran, now retired, I have previous experience and knowledge of geo, spring/damper rates, ride heights, corner weights, and ARB settings acquired from my years racing a Mason Stiletto Imp in hill climbs and sprints. See photo below.
I would have loved to have been able to contribute my tuppence worth to this topic had I been lucky enough to buy a GT4 2 years ago. Unfortunately a progressive illness has now ruled out that option for good.
These days I just have to content myself with my 718 CS PDK specced as sporty as I can make it. I also enjoy reading the about the fun you guys are having with your GT4's.
Brian
As a motorsport veteran, now retired, I have previous experience and knowledge of geo, spring/damper rates, ride heights, corner weights, and ARB settings acquired from my years racing a Mason Stiletto Imp in hill climbs and sprints. See photo below.
I would have loved to have been able to contribute my tuppence worth to this topic had I been lucky enough to buy a GT4 2 years ago. Unfortunately a progressive illness has now ruled out that option for good.
These days I just have to content myself with my 718 CS PDK specced as sporty as I can make it. I also enjoy reading the about the fun you guys are having with your GT4's.
Brian
Great picture, Brian. Some kind of Stiletto silhouette hill-climb car, looks very purposeful. What engine did you have in that car, is it space-frame?
Brian_Innes
Member
Ian,
Thanks for your interest.
The Mason Stiletto retained the steel central floor pan but had a semi space frame front and rear cloaked in a very thin fibreglass body shell and plastic windows. It weighed 435kgs.
I used a Hartwell tuned 998cc heavily modified Imp engine on twin 40 DCOE Webers producing 130bhp on a good day using Avgas 140RON aviation fuel. Max revs 9200rpm.
A straight cut Jack Knight dog box and Quaife LSD provided the drive to 12" Avon A16 slicks. Gear ratios were swapped according to the event.
It was a super little car. Handled just like a lightweight 911. I could place it with millimetre accuracy and it was very nippy off the line.
Happy Days.
I could have had much fun with a GT4 in my later life using the experience and knowledge gained setting up this hill climb car. Sadly not to be.
Brian
Thanks for your interest.
The Mason Stiletto retained the steel central floor pan but had a semi space frame front and rear cloaked in a very thin fibreglass body shell and plastic windows. It weighed 435kgs.
I used a Hartwell tuned 998cc heavily modified Imp engine on twin 40 DCOE Webers producing 130bhp on a good day using Avgas 140RON aviation fuel. Max revs 9200rpm.
A straight cut Jack Knight dog box and Quaife LSD provided the drive to 12" Avon A16 slicks. Gear ratios were swapped according to the event.
It was a super little car. Handled just like a lightweight 911. I could place it with millimetre accuracy and it was very nippy off the line.
Happy Days.
I could have had much fun with a GT4 in my later life using the experience and knowledge gained setting up this hill climb car. Sadly not to be.
Brian
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