991s cab normal versus sport mode

[jonathanw]

you can drive in normmal mode but put the stop/start control off. it then will not free wheel etc. The pdk 9assumoing you have that, will learn your driving style and will adapt to your driving wheter it is aggresive or laid back. Sport mode will always be aggresive.

 

[hdoherty]

Hi all
I normally drive the car in sport mode all the time locally as it is short journeys. The long haired one decided to visit Dublin as we normally do three or four times a year. Booked Hotel and set of on Wednesday after the hair was done , na not mine, s hers. I decided to drive the car on normal mode for the total journey and decide on two routes, Derry/Londonderry via Belfast and then Dublin, this route is mainly motorway. The weather was good so roof down, overall the drive was relaxing and we averaged about 31mpg , speed varied 60mph to 90mph on over taking but i found it was difficult to maintain a constant speed due to the free wheeling technology and tyre noise was extreme as the road surfaces both in the North and the South have detererated over the last few years.
The second route on the way home was Dublin via Auchnacloy and then Derry/Londonderry, this route is not motorway, and involves you in gradients, sharp corners and short passing areas. I felt the car to be out of control at certain times due to the free wheeling especially when approaching corners on the downhill approach, now that did not bother me as im aware of the technology and all i did was touched the brake or used the steering wheel gear change to drop down a gear but my wife was not impressed and stated "what is wrong with your driving today you seem to be not in control you are doing alot more braking and your distance from the car in front is erratic".
Well i had to agree with her as in normal mode you do alot more braking and distance control is achievable by good concentration, so maybe what you save in fuel could be lost in braking and tyre costs.
I let my wife drive then and she really was not happy in normal mode as she though the car was not in her control either, so sport mode selected and the remaining few miles were great.

 

[fireblade]

My circumstances are slightly different as our speed limits here are 40 mph downwards to 15! so Sport mode is a waste of time although I switch off the stop start/freewheeling immediately . In France on motorways I leave the car in normal mode, with stop start on to get the benefit of freewheel but use the Adaptive Cruise Control which is wonderful on motorways and really does extend range. (around 30/32 mpg) I also use ACC when in medium traffic and it maintains distance and speed plus if everything comes to a halt it actually stops the car and puts the handbrake on! The only time I use Sport Plus is on the track when consumption goes doe to 9/10 mpg Cheers 991 Turbo S

 

[pwebb]

Jonathan is right, the coasting function and stop start is really just for the emissions police, so switch it off and normal service is resumed.

 

[fireblade]

ORIGINAL: pwebb Jonathan is right, the coasting function and stop start is really just for the emissions police, so switch it off and normal service is resumed.

Absolutely spot on! I asked my OPC to either disable the stop / start or at least to set it off by default and they flatly refused stating that it was "illegal under EU law to do so". I pointed out that Jersey is not in the EU but the answer was the same. Over here it is a real pain you know where. If I forget to turn it off the car just stops every few minutes, first at the end of our lane where you do not want to stop. Wonder what this does to the battery and starter motor. The freewheeling is useful and should really be separate but the whole is just a con thought up to pacify the Brussels bureaucrats who are trying to justify their sky high salaries and probably fails to provide the supposed benefits under most normal motoring conditions.

 

[pwebb]

Yes, interestingly, our new facelift Cayenne has the dreaded Adblue and coasting features added to the otherwise identical engine as the previous model, and I am getting 10% worse fuel consumption. Another 991 member with the same Cayenne diesel ownership history reported the same phenomenon. So, it is better on the standard laboratory emissions cycle, but worse in real life.

 

[fireblade]

ORIGINAL: pwebb Yes, interestingly, our new facelift Cayenne has the dreaded Adblue and coasting features added to the otherwise identical engine as the previous model, and I am getting 10% worse fuel consumption. Another 991 member with the same Cayenne diesel ownership history reported the same phenomenon. So, it is better on the standard laboratory emissions cycle, but worse in real life.

Are we surprised? Real life motoring is nothing compared to the testing environment. Unless I am on a motorway the coasting is a waste of time.

 

[bobfair]

The stop start on my Diesel S is way to keen. It switches the car off before the car is stationary and can be dangerous as you loose the power steering and the ability to steer the vehicle. There is definitely a knack in using the coasting function as you can lift off much earlier than you think, maintain speed and save fuel but you need to be careful as you can approach junctions faster than you should with vigorous braking required