991.2 C2 GTS, first impression and tyre/suspension queries

[Gorsh]

My long awaited GTS is finally here, collected it last Saturday and have now put 800 miles on it mainly in North Wales. Arrived home in the IOM yesterday, so only been on roads I know well very briefly.

First impressions? It looks great from all angles - the wide rear especially looks the business, and the interior is a lovely place to be, it has the full GTS interior with silver stitching. The 18 way seats are great (although I'm still tweaking the adjustment occasionally). Despite taking it easy and not allowing the revs to go high I can tell it's very fast - the way it picks up speed on a light throttle seamlessly changing gears at around 3k revs feels very good. Compared to my previous BGTS it's a lot more refined, a bit of tyre roar is all that intrudes when cruising, I do hear the engine and exhaust a bit when it's accelerating, I dare say that will increase when I open her up - just trying to get well over the 1000 mile mark first. I haven't heard it from outside the car when it's on the move, but at idle I notice the exhaust is quite noisy from outside. I've taken to be detailed this morning and my wife said it was loud when I started up and drove off - only a little of the noise is heard inside the car, so a good car for long drives.

The one area where I'm not sure about yet is the ride quality on bumpy roads, the ride feels choppy - it's hard to describe really, but the stability on corners is superb, it's in a straight line on a bumpy (not potholes, just uneven) surface at over 50mph, a single bump like a grid is well handled with no bounce so it feels well damped on single bumps or depressions in the road, the ride is not jarring either except a bit at very low speed. It just doesn't seem to handle bumpy sections like I think it should - it feels like the car is struggling with these surfaces. It may just be me of course expecting too much it - it's been a while since I sold the Boxster and the Boxster did jump around a fair bit on bumps, but I don't remember feeling it was choppy like this car is. I have the -10 PASM and PDCC on the car, I have tried the sport chassis setting, it certainly firms it up and gives more control, but at the expense of a ride too solid on a bumpy road - I do feel the sport chassis will be very useable though on a decently surfaced road, it doesn't feel so hard that it's for track only.
The tyre pressures are something I haven't looked at yet, the TPM tells me it is set at full load and comfort and the pressures are between +0.2 bar and +0.4 bar over. I took the car out last night and unticked the comfort box on the TPM, when I parked up a warning came on saying the tyres were underinflated. So this is an area I can experiment with to see if I can improve the ride quality - I'd be very interested to hear what tyre pressures and TPM settings you all use? And how critical are the tyre pressures in the respect of ride quality and handling?

I chose the -10 PASM because the C4S I test drove had sport PASM (-20) and PDCC, it rode really well but was too firm on typical B roads for me, so I decided on the -10 for a bit more compliancy - I did drive a -10 car too (albeit only a short drive), it seemed absolutely fine, it didn't have PDCC, but I decided to opt for PDCC on the basis that it would add extra body control to complement the -10 PASM.

I don't know if I've got a but of OCD here lol, the car is really very very good - but this ride quality is bugging me right now.

This is the best photo I have so far - will take more and some of the interior when I get it back from the detailer tomorrow.

For those who have read this far - sorry for rambling a bit - but I would appreciate your opinions - thanks.

[bertie]

I'm afraid I have nothing to add, but the car looks great!

[Kendrik]

I have a 991.2 C2S and it is very sensitive to tyre pressure. I changed mine to the fast setting as much out of interest (I think something like 2.2 front 2.6 rear) and it made the ride really hard in general driving, very much like you are describing, a bit skittish on bumpy roads. I put it back to comfort and single passenger setting - I think 2.2 rear 2.0 front (sorry on holiday so can't check) and it makes a huge difference even though the numbers seem too low!

Car looks great by the way, (although I have the same colour scheme)! I really wanted a GTS but ordered in Jine last year as I couldn't wait! I think you'll find the standard PASM great - it's perfect for everyday use, and I've also found the car and noise to have really opened up at 5k miles. Enjoy

[Gorsh]

Kendrik said:

I have a 991.2 C2S and it is very sensitive to tyre pressure. I changed mine to the fast setting as much out of interest (I think something like 2.2 front 2.6 rear) and it made the ride really hard in general driving, very much like you are describing, a bit skittish on bumpy roads. I put it back to comfort and single passenger setting - I think 2.2 rear 2.0 front (sorry on holiday so can't check) and it makes a huge difference even though the numbers seem too low!

Car looks great by the way, (although I have the same colour scheme)! I really wanted a GTS but ordered in Jine last year as I couldn't wait! I think you'll find the standard PASM great - it's perfect for everyday use, and I've also found the car and noise to have really opened up at 5k miles. Enjoy

Thanks for that. I'll try changing the tyre pressures and see if I can improve it, I also think I could be expecting a bit too much, the handling on corners is brilliant, so more driving to settle things down and get used to it, and through trial and error find the tyre pressure setting I think is best - with the wide low profile tyres I suppose the pressures are bound to make a significant difference.

[Nello5000]

Gorsh said:

My long awaited GTS is finally here, collected it last Saturday and have now put 800 miles on it mainly in North Wales. Arrived home in the IOM yesterday, so only been on roads I know well very briefly.

First impressions? It looks great from all angles - the wide rear especially looks the business, and the interior is a lovely place to be, it has the full GTS interior with silver stitching. The 18 way seats are great (although I'm still tweaking the adjustment occasionally). Despite taking it easy and not allowing the revs to go high I can tell it's very fast - the way it picks up speed on a light throttle seamlessly changing gears at around 3k revs feels very good. Compared to my previous BGTS it's a lot more refined, a bit of tyre roar is all that intrudes when cruising, I do hear the engine and exhaust a bit when it's accelerating, I dare say that will increase when I open her up - just trying to get well over the 1000 mile mark first. I haven't heard it from outside the car when it's on the move, but at idle I notice the exhaust is quite noisy from outside. I've taken to be detailed this morning and my wife said it was loud when I started up and drove off - only a little of the noise is heard inside the car, so a good car for long drives.

The one area where I'm not sure about yet is the ride quality on bumpy roads, the ride feels choppy - it's hard to describe really, but the stability on corners is superb, it's in a straight line on a bumpy (not potholes, just uneven) surface at over 50mph, a single bump like a grid is well handled with no bounce so it feels well damped on single bumps or depressions in the road, the ride is not jarring either except a bit at very low speed. It just doesn't seem to handle bumpy sections like I think it should - it feels like the car is struggling with these surfaces. It may just be me of course expecting too much it - it's been a while since I sold the Boxster and the Boxster did jump around a fair bit on bumps, but I don't remember feeling it was choppy like this car is. I have the -10 PASM and PDCC on the car, I have tried the sport chassis setting, it certainly firms it up and gives more control, but at the expense of a ride too solid on a bumpy road - I do feel the sport chassis will be very useable though on a decently surfaced road, it doesn't feel so hard that it's for track only.
The tyre pressures are something I haven't looked at yet, the TPM tells me it is set at full load and comfort and the pressures are between +0.2 bar and +0.4 bar over. I took the car out last night and unticked the comfort box on the TPM, when I parked up a warning came on saying the tyres were underinflated. So this is an area I can experiment with to see if I can improve the ride quality - I'd be very interested to hear what tyre pressures and TPM settings you all use? And how critical are the tyre pressures in the respect of ride quality and handling?

I chose the -10 PASM because the C4S I test drove had sport PASM (-20) and PDCC, it rode really well but was too firm on typical B roads for me, so I decided on the -10 for a bit more compliancy - I did drive a -10 car too (albeit only a short drive), it seemed absolutely fine, it didn't have PDCC, but I decided to opt for PDCC on the basis that it would add extra body control to complement the -10 PASM.

I don't know if I've got a but of OCD here lol, the car is really very very good - but this ride quality is bugging me right now.

This is the best photo I have so far - will take more and some of the interior when I get it back from the detailer tomorrow.

For those who have read this far - sorry for rambling a bit - but I would appreciate your opinions - thanks.

Looks great and about the spec and colour I have arrived at

[B1ggest]

I know what your saying, some of the local fen roads have sharp uneven sections, I just assumed its how they are (first Porsche) I'll have a play with the pressures if the consensus is that it would help,

What pressure should I try? I'm at 2.8 front 3.4 back, which is how it came..

Great Picture..

[Bystander1978]

Snap although gen 1
It is a sports car so firm expected no?

[Gorsh]

Bystander1978 said:

Snap although gen 1
It is a sports car so firm expected no?

Yes, I expect it to be firm, and it is just about right in that respect. Is yours -10 PASM? It's just when it hits a section of road which is has irregular lumps and bumps which seem to unsettle the car - I wonder if the PDCC is overcompensating trying to keep the car stable in this situation? On a road with smoother undulations the car is stable and also on corners it's flat and composed. It's probably normal and just me being paranoid as I did agonise over which suspension options to choose. I'll get some miles on the clock and see how it feels then - if I'm in doubt I can get it checked out at the OPC in late September as I'll be in the area. I'm happy with the firmness and suppleness of the -10 PASM.... just hoping adding the PDCC wasn't a mistake.

[bertie]

Gorsh said:

Yes, I expect it to be firm, and it is just about right in that respect. Is yours -10 PASM? It's just when it hits a section of road which is has irregular lumps and bumps which seem to unsettle the car - I wonder if the PDCC is overcompensating trying to keep the car stable in this situation? On a road with smoother undulations the car is stable and also on corners it's flat and composed. It's probably normal and just me being paranoid as I did agonise over which suspension options to choose. I'll get some miles on the clock and see how it feels then - if I'm in doubt I can get it checked out at the OPC in late September as I'll be in the area. I'm happy with the firmness and suppleness of the -10 PASM.... just hoping adding the PDCC wasn't a mistake.

Suspension geometry could be out?

Factory setup is famously variable.

Trip to Centre Gravity would see that right 👍🏼

[Gorsh]

bertie said:

Suspension geometry could be out?

Factory setup is famously variable.

Trip to Centre Gravity would see that right ????

Something to bear in mind - thanks. Centre Gravity are out of my way, but I'm sure I could find a local place with the alignment equipment.

[isaldiri]

B1ggest said:

I know what your saying, some of the local fen roads have sharp uneven sections, I just assumed its how they are (first Porsche) I'll have a play with the pressures if the consensus is that it would help,

What pressure should I try? I'm at 2.8 front 3.4 back, which is how it came..

.

you can't seriously be running those kinds of tyre pressures? 2.8 / 3.4 bar would be sky high. Unless you were running at very very high speeds and/or fully loading the car something like 2.2 / 2.5 cold if not a bit lower would be suitable.

[Kendrik]

isaldiri said:

B1ggest said:

I know what your saying, some of the local fen roads have sharp uneven sections, I just assumed its how they are (first Porsche) I'll have a play with the pressures if the consensus is that it would help,

What pressure should I try? I'm at 2.8 front 3.4 back, which is how it came..

.

you can't seriously be running those kinds of tyre pressures? 2.8 / 3.4 bar would be sky high. Unless you were running at very very high speeds and/or fully loading the car something like 2.2 / 2.5 cold if not a bit lower would be suitable.

Agreed, that must be like running on concrete wheels! As above, I'm running much softer and it improves the ride and handling.

[Bystander1978]

Mine is -20 PASM, firm but it's not a daily and so in my mind perfect.
I also love the lowered look

[cormeist]

Does look stunning, ive ordered a GTS with 20mm, i found it fine.

[Gorsh]

Update on my car - thanks to the pointer about tyre pressures, mine were too high (max setting), so reduced to 2.1/2.4 and what a difference! Plus gave the car a fast run on uneven roads to give the suspension a good work out to settle it in - the car feels fine now, I was comparing it to how my BGTS handled and even the -10 suspension is firmer than the Boxster was - (that may be due to the PDCC), but it's fine anyway, nicely firm and when it hits bumps it absorbs them nicely. I also drove a fast stretch of good surfaced road and it was absolutely fine on the sport chassis setting, cornered it very hard and she was rock steady - so I'm now a very happy chappie!

I got it back from being detailed today - a couple of photos...







Thanks again
Gordon.

[Phooey]

Are you sure your car has -10mm sus?? Might be the pics but it looks a lot lower than the -10 car I was in yesterday! Does look fantastic though

[Gorsh]

Phooey said:

Are you sure your car has -10mm sus?? Might be the pics but it looks a lot lower than the -10 car I was in yesterday! Does look fantastic though

Thank you - I am delighted I chose GT Silver, and the detailer did a great job. As for the suspension - yes it's the -10, it is hard to tell unless they were side by side I expect as 10mm isn't much really.

[B1ggest]

Sounds like I need to reduce mine, they are as from dealer, you would think dealer would sort this at PDi, perhaps not....

[Gorsh]

B1ggest said:

Sounds like I need to reduce mine, they are as from dealer, you would think dealer would sort this at PDi, perhaps not....

It looks like they do check them, but set the full load/max speed pressure - I suppose you could take it straight to Germany so they take no chances. They should point out that for UK use the pressures can be set lower though - all the pressure variations are on the sticker, and don't forget to change the setting in the TPM on the display.

[B1ggest]

Ok I've dropped the pressure in the tyres, what am I doing in the monitoring system exactly?