GTS Ride Quality with or without Active Ride

[dcp10]

Razorsharp!

Excellent! Which wheel option did you go for please?

I suspect that your roads are rather smoother than ours though.

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[mpaulus007]

Excellent! Which wheel option did you go for please?

I suspect that your roads are rather smoother than ours though.

Tire Option: The ones in the profile picture. Well - some roads are smooth - others are not. Independent of the smoothness it is all about the cornering speed and the wellbeing of passengers while speeding

 

[prj]

Maybe this graph will add value to the discussion. It is comparing J1.1 Air Suspension Standard / GTS with J1.2 PAR / PAR Active Ride

I was concerned that the GTS-ride would be too stiff. I have now 6k km on my J1.2 GTS ST odo (20 inch wheels) w/ PAR and LOOOOVVVVEEE the ride: So smooth, still so agile in cornering. Totally amazing. Great invest!!

It's purely damper compression/rebound valve characteristic settings in the suspension controller, nothing else. So only a software change, as the hardware itself is identical.

Of course if you would overlay e.g. GTS in normal and then a 4S in sport, then the graph would be skewed towards the 4S being harsher and so on.
You can do that all the way until sport plus where the GTS will be the firmest.

 

[Alain13]

It's purely damper compression/rebound valve characteristic settings in the suspension controller, nothing else. So only a software change, as the hardware itself is identical.

Of course if you would overlay e.g. GTS in normal and then a 4S in sport, then the graph would be skewed towards the 4S being harsher and so on.
You can do that all the way until sport plus where the GTS will be the firmest.

So that leaves the question: does the Turbo GT has an even more aggressive PAR tune than the GTS?

 

[cityhpper]

It's purely damper compression/rebound valve characteristic settings in the suspension controller, nothing else. So only a software change, as the hardware itself is identical.

Interesting. Across how many of the J1.2 models that can be delivered with PAR, is this the reality?

For the J1.1 GTS, and standard air suspension, I was told it has a thicker and stiffer anti-roll bar.

 

[prj]

Interesting. Across how many of the J1.2 models that can be delivered with PAR, is this the reality?

For the J1.1 GTS, and standard air suspension, I was told it has a thicker and stiffer anti-roll bar.

The J1.2 has the following variants of the suspension:
Front damper + spring (single unit):
1) Sedan & ST w/o PAR
2) Sedan & ST with PAR
3) CT w/o PAR
4) CT with PAR

Rear spring:
1) w/o PAR
2) with PAR

Rear damper:
1) Sedan & ST
2) CT

That's it.
The cars with PAR do not have anti roll bars. There are no mechanical differences between any of the cars with PAR. Furthermore the springs are always the same, but the CT gets different dampers because it has more suspension travel. Because in the front the spring and damper are integrated into one unit 4 variants are needed to cover PAR/non-PAR and CT/non-CT.

For cars without PAR, there are a bunch of different anti roll bars:
1) Sedan & ST have 4 different ones:
a) "comfort"
b) "sport"
c) "sport" special edition
d) "Turbo S"
2) CT

I don't know exactly how they are mapped to all of the cars, only way to find out is get a bunch of VINs and look it up.

So when there is no PAR then there is a physical difference in the ARB, that makes the car stiffer side to side.

 

[prj]

So that leaves the question: does the Turbo GT has an even more aggressive PAR tune than the GTS?

The tune differences are not PAR it's 90%+ the dampers. PAR has no effect on the high-frequency low-amplitude shaking (vibration) of the car, that's all wheel size and damper settings.

 

[Beattie]

@prj i’m sure you’ve probably mentioned this before, so forgive me, but how do you know so much about all this?

 

[prj]

@prj i’m sure you’ve probably mentioned this before, so forgive me, but how do you know so much about all this?

It's literally my job to do that ?

 

[Beattie]

It's literally my job to do that ?

So do you work for Porsche or what is your job?

 

[prj]

So do you work for Porsche or what is your job?

I am in automotive for 15 years. Have done powertrain calibration for more than 10. More software development these days than calibration:
www.vehical.net
www.mapev.net

 

[Beattie]

I am in automotive for 15 years. Have done powertrain calibration for more than 10. More software development these days than calibration:
www.vehical.net
www.mapev.net

Thanks. That explains your helpful in-depth knowledge.

 

[Fun TC Driving]

Thank you”prj” for ALL you contribute here!!!

Does prj, just joking, stand for Porsche Racing Job?

 

[Alain13]

The tune differences are not PAR it's 90%+ the dampers. PAR has no effect on the high-frequency low-amplitude shaking (vibration) of the car, that's all wheel size and damper settings.

Oké let me rephrase myself
Does the Turbo GT have an even more aggressive damper tune than the GTS?

 

[TehPenguin]

The tune differences are not PAR it's 90%+ the dampers. PAR has no effect on the high-frequency low-amplitude shaking (vibration) of the car, that's all wheel size and damper settings.

Car and Driver did a great test to show this:
https://www.caranddriver.com/features/a63410460/ride-quality-test/

Final graphic from that article shows how PAR greatly reduced low frequency (<4Hz) changes, but doesn't do much better than traditional suspension for higher frequency shaking and buzzes:

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