991.2 GT3 - Colours. Spec. Q+A. etc etc..
Discussion
Porsche911R said:
It’s worth a geo after 1000 miles imo, I,ll keep rear toe stock, but up the front camber to -2.0 and the rear to about -1.8 and see what that’s like, I,ll also remove the front toe in for dead straight, I might add front monoball ends for slightly better steering feel, and monoball rear toe link to stop anything moving under brakes. I am not after a track set up, just mental fast road which can take a track day if I wish. I tend to do this with all my cars and it works for me very well without going crazy.
Hi D,You have been in my GT3 round Silverstone. I run 2.4 Neg Camber front 2.1 on the rear. Front arb to middle, rear to full firm. 15mm lower ride to the front 11mm to rear. Leave Toe as stock. The car is like fair ground ride.
APOLO1 said:
Hi D,
You have been in my GT3 round Silverstone. I run 2.4 Neg Camber front 2.1 on the rear. Front arb to middle, rear to full firm. 15mm lower ride to the front 11mm to rear. Leave Toe as stock. The car is like fair ground ride.
Great feedback based on first hand experience..I have had an extraordinary busy winter coupled with the atrocious weather has limited my time to drive my cars..I've finally reached 1k miles and intend to have a geo soon to see how far mine is off factory recommended settings,and go from there.You have been in my GT3 round Silverstone. I run 2.4 Neg Camber front 2.1 on the rear. Front arb to middle, rear to full firm. 15mm lower ride to the front 11mm to rear. Leave Toe as stock. The car is like fair ground ride.
My first question is before tracking mine is how does your GT3 behaves on bumpy roads taking into account that Silverstone is much smoother than a typical track..Does your rear tyres suffer from tyre roll in extremis and is its stable under hard braking .
Also is my assumption that hot tyre pressures of 30F 34R is optimal..
Yes I confirm, I added shims front and rear, about 10 mm per corner.
+ 0.1 rear toe is what I found stock and I left it that way.
Stock front toe was slightly closed and I slightly opened it with some improvements in the steering feeling at little angles.
Also adjusted F/R heights: -5 mm F +3 mm R.
Didn’t want too low because of the karusells.
The problem of adding front caster (due to suspension design when adding camber) is that the wheels rub against the front part of the wheelarch...2°30’ seems to be the max acceptable camber value from that point of view (and they already rub).
I’m happy with the handling now except some exit understeer which I would try to correct with the F ARB at its softest setring (stock settings now: middle position?).
+ 0.1 rear toe is what I found stock and I left it that way.
Stock front toe was slightly closed and I slightly opened it with some improvements in the steering feeling at little angles.
Also adjusted F/R heights: -5 mm F +3 mm R.
Didn’t want too low because of the karusells.
The problem of adding front caster (due to suspension design when adding camber) is that the wheels rub against the front part of the wheelarch...2°30’ seems to be the max acceptable camber value from that point of view (and they already rub).
I’m happy with the handling now except some exit understeer which I would try to correct with the F ARB at its softest setring (stock settings now: middle position?).
Edited by Mr.Brick on Saturday 21st April 23:14
APOLO1 said:
Hi D,
You have been in my GT3 round Silverstone. I run 2.4 Neg Camber front 2.1 on the rear. Front arb to middle, rear to full firm. 15mm lower ride to the front 11mm to rear. Leave Toe as stock. The car is like fair ground ride.
It was on rails and was an eye opener :-) but it's a bit low for my intended use so based on that I am dialing mine back a bit for fast road use, but need a better geo than stock so I can do a few evenings at Donnington.You have been in my GT3 round Silverstone. I run 2.4 Neg Camber front 2.1 on the rear. Front arb to middle, rear to full firm. 15mm lower ride to the front 11mm to rear. Leave Toe as stock. The car is like fair ground ride.
Over taking a ferrari cup car and a radical in a GT3 road car was fun though, I look forward to a trip in the GT2.
The performance window in these cars is mind blowing really.
Edited by Porsche911R on Saturday 21st April 23:16
Porsche911R said:
It was on rails and was an eye opener :-) but it's a bit low for my intended use so based on that I am dialing mine back a bit for fast road use, but need a better geo than stock so I can do a few evenings at Donnington.
Over taking a ferrari cup car and a radical in a GT3 road car was fun though, I look forward to a trip in the GT2.
The performance window in these cars is mind blowing really.
Even after all my time round SS in my 91RS, I was shocked at the speeds the GT3.2 could carry through the fast corners. It felt just so planted. Club, Woodcote are an easy flat on the throttle. The tyres are also wearing completely even. See below. On road its also very easy to live with, even the ride height. Over taking a ferrari cup car and a radical in a GT3 road car was fun though, I look forward to a trip in the GT2.
The performance window in these cars is mind blowing really.
Edited by Porsche911R on Saturday 21st April 23:16
Taffy66 said:
Great feedback based on first hand experience..I have had an extraordinary busy winter coupled with the atrocious weather has limited my time to drive my cars..I've finally reached 1k miles and intend to have a geo soon to see how far mine is off factory recommended settings,and go from there.
My first question is before tracking mine is how does your GT3 behaves on bumpy roads taking into account that Silverstone is much smoother than a typical track..Does your rear tyres suffer from tyre roll in extremis and is its stable under hard braking .
Also is my assumption that hot tyre pressures of 30F 34R is optimal..
On the settings I now run. In my view the car actually rides better on road than the stock settings. In so much as the right height is to high as stock for me. Also the steering now weights up nicely due to using more of the contact patch. Tyre wear is prefect even both front and rear. And I absolutely hammer it round Silverstone. I will post up the part Nos for the Shims later...My first question is before tracking mine is how does your GT3 behaves on bumpy roads taking into account that Silverstone is much smoother than a typical track..Does your rear tyres suffer from tyre roll in extremis and is its stable under hard braking .
Also is my assumption that hot tyre pressures of 30F 34R is optimal..
APOLO1 said:
On the settings I now run. In my view the car actually rides better on road than the stock settings. In so much as the right height is to high as stock for me. Also the steering now weights up nicely due to using more of the contact patch. Tyre wear is prefect even both front and rear. And I absolutely hammer it round Silverstone. I will post up the part Nos for the Shims later...
Sounds great especially with Mr D's blessing on top.!This is what i love,get someone else to do all the hard leg work and then copy them..Question is whether or not do i trust my OPC to all the geo or get an independent specialist..?
Taffy66 said:
Sounds great especially with Mr D's blessing on top.!
This is what i love,get someone else to do all the hard leg work and then copy them..Question is whether or not do i trust my OPC to all the geo or get an independent specialist..?
I also took Mr JJW out, think he was impressed. This is what i love,get someone else to do all the hard leg work and then copy them..Question is whether or not do i trust my OPC to all the geo or get an independent specialist..?
I let an OPC do mine that I had not used before. To be honest. They are not my settings. They came from someone who has GT3.2, but drives a 991RSR as his day Job.....
Oh, On these new Cups. Braking from high speeds feels very dependent on Tyre Pressure's. When hot dialled down I run 28 Front 31 rear. Takes about 3 dial downs before they become stable.....
What are people’s front splitter heights, my car already seems low at 120mm
Any one else fancy a nip to their garage and report back.
I have lift and scrape bits still, the tilt def makes the rear fins drop a bit, but look under the car and the front ducts are bloody low, I could not take 15mm out of my car as it stands atm.
I still have to angle some ramps with lift up other wise my rear fins scrape.
Any one else fancy a nip to their garage and report back.
I have lift and scrape bits still, the tilt def makes the rear fins drop a bit, but look under the car and the front ducts are bloody low, I could not take 15mm out of my car as it stands atm.
I still have to angle some ramps with lift up other wise my rear fins scrape.
Edited by Porsche911R on Sunday 22 April 13:06
Porsche911R said:
What are people’s front splitter heights, my car already seems low at 120mm
Any one else fancy a nip to their garage and report back.
I have lift and scrape bits still, the tilt def makes the rear fins drop a bit, but look under the car and the front ducts are bloody low, I could not take 15mm out of my car as it stands atm.
I still have to angle some ramps with lift up other wise my rear fins scrape.
Why din't you send us a picture, then we can look at the splitter Any one else fancy a nip to their garage and report back.
I have lift and scrape bits still, the tilt def makes the rear fins drop a bit, but look under the car and the front ducts are bloody low, I could not take 15mm out of my car as it stands atm.
I still have to angle some ramps with lift up other wise my rear fins scrape.
Edited by Porsche911R on Sunday 22 April 13:06
Porsche911R said:
What are people’s front splitter heights, my car already seems low at 120mm
Any one else fancy a nip to their garage and report back.
I have lift and scrape bits still, the tilt def makes the rear fins drop a bit, but look under the car and the front ducts are bloody low, I could not take 15mm out of my car as it stands atm.
I still have to angle some ramps with lift up other wise my rear fins scrape.
Just measured mine at the exact middle point in the splitter and it is exactly 127mm..I said nearly a year ago that by raising the front will cause the rear to lower...Any one else fancy a nip to their garage and report back.
I have lift and scrape bits still, the tilt def makes the rear fins drop a bit, but look under the car and the front ducts are bloody low, I could not take 15mm out of my car as it stands atm.
I still have to angle some ramps with lift up other wise my rear fins scrape.
Edited by Porsche911R on Sunday 22 April 13:06
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