Discussion
Melvynr said:
peeler said:
I’m really looking forward to getting the car on the road and track, I’m not fussed about a busy front end or stiff suspension, it’s a GT3 I wouldn’t expect anything less.
By all accounts the new suspension has really improved the tyre wear
I wouldn't worry about tyre wear as it will be negligible.Double wishbone offers better turn in and a more comfortable ride as each front wheel is independent of the other.Am asking myself so why is the word 'busy' getting mentioned when driven on the road, more downforce requires stiffer springs.I guess we wont know until the road reviews come out.I know your view is yes its a GT3, but the GT3 was always built for the road and to take to a track , unlike the RS which was built for the track but can also drive on the road.Its a big difference to people who would buy a GT car. By all accounts the new suspension has really improved the tyre wear
993rsr said:
It will be unless you add some camber, the tyre will still roll on the outer edge. You can negate uneven wear I'm running 3 degrees negative on the front and the tyre is wearing very evenly accross the tread (991.2 Touring).
Is that setting you keep all the time or just for the trackMelvynr said:
I wouldn't worry about tyre wear as it will be negligible.Double wishbone offers better turn in and a more comfortable ride as each front wheel is independent of the other.Am asking myself so why is the word 'busy' getting mentioned when driven on the road, more downforce requires stiffer springs.I guess we wont know until the road reviews come out.I know your view is yes its a GT3, but the GT3 was always built for the road and to take to a track , unlike the RS which was built for the track but can also drive on the road.Its a big difference to people who would buy a GT car.
so following that logic, if you don't care about the aero you can go with softer springs and get best of both worlds?james.a.c.911 said:
so following that logic, if you don't care about the aero you can go with softer springs and get best of both worlds?
I doubt whether the new 992 touring will have the same spring rate as no aero.You prob have seen the huge diff in aero on the 992 gt3 than the .2 gt3, the 992 will have much more stiffer springs than the .2 to make it work.You wont get the best of both worlds , its one or the other.It will be how acceptable it is for the road which is all about the GT3.Melvynr said:
I doubt whether the new 992 touring will have the same spring rate as no aero.You prob have seen the huge diff in aero on the 992 gt3 than the .2 gt3, the 992 will have much more stiffer springs than the .2 to make it work.You wont get the best of both worlds , its one or the other.It will be how acceptable it is for the road which is all about the GT3.
I'm not really sure why aero constantly gets imbued with the ability to be the reason for any change in modern cars these days. The 992 gt3 has at maximum speed perhaps 200kg more downforce (i don't exactly remember and the exact number is irrelevant) than 991.2 gt3. that is in context of a ~1500kg car (without driver and luggage). The springs have to be able to support the weight of the car at full capacity and full speed. How exactly is all this 'huge diff in aero on the 992 gt3' the main reason for the stiffer springs when the spring rate has supposedly increased by almost double what it used to be given the overall vertical forces on the car will only have increased by 10% (at most)......?
The difference in spring rates is going to be related to wanting the car to have different vehicle dynamics - there has been a clear shift in the way Porsche GT want to setup their cars since the 991.2rs (slightly more downforce than the 991.1, very different spring rates). That change has now come through to the standard gt3.
993rsr said:
It will be unless you add some camber, the tyre will still roll on the outer edge. You can negate uneven wear I'm running 3 degrees negative on the front and the tyre is wearing very evenly accross the tread (991.2 Touring).
Wow that’s some camber !! I’m not very technical but when I was racing my race car had 3 degrees front 2.5 rear and the front were very noticeably pointing inwards , does yours look the same ??isaldiri said:
I'm not really sure why aero constantly gets imbued with the ability to be the reason for any change in modern cars these days.
The 992 gt3 has at maximum speed perhaps 200kg more downforce (i don't exactly remember and the exact number is irrelevant) than 991.2 gt3. that is in context of a ~1500kg car (without driver and luggage). The springs have to be able to support the weight of the car at full capacity and full speed. How exactly is all this 'huge diff in aero on the 992 gt3' the main reason for the stiffer springs when the spring rate has supposedly increased by almost double what it used to be given the overall vertical forces on the car will only have increased by 10% (at most)......?
The difference in spring rates is going to be related to wanting the car to have different vehicle dynamics - there has been a clear shift in the way Porsche GT want to setup their cars since the 991.2rs (slightly more downforce than the 991.1, very different spring rates). That change has now come through to the standard gt3.
From what I have read the aero underneath the car is different and coupled with the new wing creates 50 per cent more downforce as standard but can increase this to 150 per cent if you want to, I think that is huge compared to the .2.To do that it will need a stiffer spring rate, how that transfers to comfort on the road will be anyones guess.Personally, I dont think id like a 10 per cent more stiffer spring for road driving as the .2 is on its limits for a fast B road blast, that is what the GT3 is all about.The 992 gt3 has at maximum speed perhaps 200kg more downforce (i don't exactly remember and the exact number is irrelevant) than 991.2 gt3. that is in context of a ~1500kg car (without driver and luggage). The springs have to be able to support the weight of the car at full capacity and full speed. How exactly is all this 'huge diff in aero on the 992 gt3' the main reason for the stiffer springs when the spring rate has supposedly increased by almost double what it used to be given the overall vertical forces on the car will only have increased by 10% (at most)......?
The difference in spring rates is going to be related to wanting the car to have different vehicle dynamics - there has been a clear shift in the way Porsche GT want to setup their cars since the 991.2rs (slightly more downforce than the 991.1, very different spring rates). That change has now come through to the standard gt3.
peeler said:
Wow that’s some camber !! I’m not very technical but when I was racing my race car had 3 degrees front 2.5 rear and the front were very noticeably pointing inwards , does yours look the same ??
I'm not a suspension engineer but I suspect race car ride heights probably mean 3 degrees of camber is going to be a little more obvious than a road car!Melvynr said:
From what I have read the aero underneath the car is different and coupled with the new wing creates 50 per cent more downforce as standard but can increase this to 150 per cent if you want to, I think that is huge compared to the .2.To do that it will need a stiffer spring rate, how that transfers to comfort on the road will be anyones guess.Personally, I dont think id like a 10 per cent more stiffer spring for road driving as the .2 is on its limits for a fast B road blast, that is what the GT3 is all about.
As I said in my post, as a % of total overall vertical force on the car, the increase of downforce of the 992 gt3 over the 991.2 is simply not going to be the main reason for the very different spring rates. 50% more downforce of an amount that's relatively small in context of the entire weight of the car + driver is still a relatively small amount........isaldiri said:
As I said in my post, as a % of total overall vertical force on the car, the increase of downforce of the 992 gt3 over the 991.2 is simply not going to be the main reason for the very different spring rates. 50% more downforce of an amount that's relatively small in context of the entire weight of the car + driver is still a relatively small amount........
Just found the spec which actually says its 385 kilo of downforce at 124 mph.Anyway the road reviews may give it a big thumbs up which I hope it will be.Melvynr said:
isaldiri said:
As I said in my post, as a % of total overall vertical force on the car, the increase of downforce of the 992 gt3 over the 991.2 is simply not going to be the main reason for the very different spring rates. 50% more downforce of an amount that's relatively small in context of the entire weight of the car + driver is still a relatively small amount........
Just found the spec which actually says its 385 kilo of downforce at 124 mph.Anyway the road reviews may give it a big thumbs up which I hope it will be.isaldiri said:
I guarantee 385kg of downforce at 124mph is incorrect.
Your probably right as I doubt people would alter the front splitter and wing , but according to P it can be done.https://www.pistonheads.com/news/ph-driven/2021-po...
pumper1 said:
Mine is scheduled for:- Fixed in production :- 21.05 ; Body Shop :- 11.06 ; Completion 18.06 how do you track it without pestering the centre ?? By what I read cars appear to be on schedule.
Exactly same dates as mine - let’s hope we don’t both have the same car - unless it comes to me, lol 
Melvynr said:
isaldiri said:
I guarantee 385kg of downforce at 124mph is incorrect.
Your probably right as I doubt people would alter the front splitter and wing , but according to P it can be done.https://www.pistonheads.com/news/ph-driven/2021-po...
isaldiri said:
That article was completely wrong in that claim. it mixed up downforce at maximum speed with that figure at 124mph. there is as I said zero chance it produces 385kg of downforce at 124mph.
When you look at the ring laps of Lars Kern in the .2 and 992 from the gantry, the downforce doesn't give any more speed which you would think it would going by the claims.Would be good to see the .2 on R Tyre on a flying lap.Gassing Station | 911/Carrera GT | Top of Page | What's New | My Stuff