Discussion
though you might like this.
991 with PDCC vs 997 through a slalom course. apparently the 997 has some broken springs or similar
http://www.youtube.com/watch?v=ny2cO_LGSFE
991 with PDCC vs 997 through a slalom course. apparently the 997 has some broken springs or similar
http://www.youtube.com/watch?v=ny2cO_LGSFE
Edited by fioran0 on Wednesday 29th February 00:50
betternotbigger said:
Happy you specced PDCC now, Manks? Big difference. And though many voices, mine included, complain this compromises the 911ness and its unique rewards, I can't see the point in the upgrade from 997 if you don't take advantage of the new technology. So enjoy!!
Totally. I've only got it because Porsche...erm...delayed my order, which gave me the chance to drive PDCC and non-PDCC cars back to back. Even then though I thought I didn't need it, but when driving the non-PDCC car hard the bob, bob, bobbing in a tight bend contributed to the back end stepping out.Initially I thought, "yeah but it's a 911 and that's one of its quirks". Then I considered why it was I liked the 991 and that basically came down to its LACK of quirks and its improvements upon the 997. So I thought, "I'm buying a new car (at some considerable cost) for a good reason and then diluting that reason by not making the car as good as it can be".
So with only a few hours before the order froze I added PDCC. I am very glad I did because the car I am getting is as perfect a spec as I could envisage.
I like the "bob" in the 997 - it telegraphs that you're trying! Of course with the PASM in sports mode, this is very significantly reduced .... 
What I want to know about the PDCC is whether it really adds the 25kg that's been suggested? Has anyone driven a car with the sports suspension but no PDCC?
MM.
What I want to know about the PDCC is whether it really adds the 25kg that's been suggested? Has anyone driven a car with the sports suspension but no PDCC?
MM.
No doubt adaptive anti-roll systems are effective in generally extending the performance envelope by minimising pitch and momentum to the outside.
But the downside is that the transition to snap oversteer and understeer is shorter and more sudden. There is greater dependence on tyre sidewalls and lateral tyre grip to announce/provide feedback before the car slides. It is at this limit the driver wants maximum chassis and steering feedback to feel the limits of adhesion. Does the 991 electric steering enhance or diminish the feedback? Hmmm... Grip-grip-grip-grip-oh crap/NO GRIP!
Looking back at some of the older cars with completely passive chassis systems - lateral movement can give a great deal of driver satisfaction as you can actually feel what the car is doing beneath you, and especially provide more information towards the limit.
But the downside is that the transition to snap oversteer and understeer is shorter and more sudden. There is greater dependence on tyre sidewalls and lateral tyre grip to announce/provide feedback before the car slides. It is at this limit the driver wants maximum chassis and steering feedback to feel the limits of adhesion. Does the 991 electric steering enhance or diminish the feedback? Hmmm... Grip-grip-grip-grip-oh crap/NO GRIP!
Looking back at some of the older cars with completely passive chassis systems - lateral movement can give a great deal of driver satisfaction as you can actually feel what the car is doing beneath you, and especially provide more information towards the limit.
spareparts said:
No doubt adaptive anti-roll systems are effective in generally extending the performance envelope by minimising pitch and momentum to the outside.
But the downside is that the transition to snap oversteer and understeer is shorter and more sudden. There is greater dependence on tyre sidewalls and lateral tyre grip to announce/provide feedback before the car slides. It is at this limit the driver wants maximum chassis and steering feedback to feel the limits of adhesion. Does the 991 electric steering enhance or diminish the feedback? Hmmm... Grip-grip-grip-grip-oh crap/NO GRIP!
In my experience it doesn't work like that.But the downside is that the transition to snap oversteer and understeer is shorter and more sudden. There is greater dependence on tyre sidewalls and lateral tyre grip to announce/provide feedback before the car slides. It is at this limit the driver wants maximum chassis and steering feedback to feel the limits of adhesion. Does the 991 electric steering enhance or diminish the feedback? Hmmm... Grip-grip-grip-grip-oh crap/NO GRIP!
I didn't have a problem with snap oversteer with the PDCC car, I did with the non-PDCC car. Why? Because of the bobbing. On the track I also managed to induce snap oversteer with little warning on a non-PDCC car.
I would suggest that on the road, snap over / under steer is more likely to be caused by extraneous factors than the car not giving enough feedback at the limit.
The electric steering argument is specious by the way, it doesn't affect feedback the the way you are suggesting.
Re-reading through the EVO magazine article on the 991, interesting that the testers said there were a couple of sudden near-miss moments when the 991 suddenly stepped sideways at the limit with no prior warning.
Given they are quite experienced (and generally adulatory) 911 drivers, this suggests the car will certainly want further adjustment/finetuning on the hotter GT3/RS/Turbo models once more power is introduced.
Given they are quite experienced (and generally adulatory) 911 drivers, this suggests the car will certainly want further adjustment/finetuning on the hotter GT3/RS/Turbo models once more power is introduced.
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