Chrono
- Thread starter MikeO
- Start date
jcosh
New member
What I would like to know is:
Does the crono need to be specced if you want quicker engine/throttle response? Why can't the throttle response be as quick without it? I understand that it changes the way PSAM works when switched to sport. If a car is ordered with sports suspension and no crono does that mean that you can't turn the PSM off?
Does the crono need to be specced if you want quicker engine/throttle response? Why can't the throttle response be as quick without it? I understand that it changes the way PSAM works when switched to sport. If a car is ordered with sports suspension and no crono does that mean that you can't turn the PSM off?
I have the sport suspension and yes you can turn PSM off.
Guest
New member
Switching Chrono on switches the PASM to sport setting too and sets the PSM back to 50%, but you can have the PASM in sport without the Chrono turned on.
To get the quicker throttle response you need to spec chrono, the enhanced throttle response it good but thats about it, I'd prefer to be able to spec it without the lap timer and have the 50% PSM selectable separately also.
Hope that makes sense [&:]
To get the quicker throttle response you need to spec chrono, the enhanced throttle response it good but thats about it, I'd prefer to be able to spec it without the lap timer and have the 50% PSM selectable separately also.
Hope that makes sense [&:]
dereksharpuk
New member
Hi Mike,
Glad that you liked my article. Despite the reservations suggested at the end of my article, I have actually specced it for my Cayman which arrives shortly. I do have reservations about track day usage, however I think like most unergonomic devices one can get used to it.
Glad that you liked my article. Despite the reservations suggested at the end of my article, I have actually specced it for my Cayman which arrives shortly. I do have reservations about track day usage, however I think like most unergonomic devices one can get used to it.
jcosh
New member
Haven't read the P/post article yet, but I will do shortly.
I was at Goodwood today and hitched a few laps with a chap who uses his Chrono to time his laps and it seamed to work fine. Just a couple of flicks of the stalk at the beginning of each lap. From what I could see it worked very well. The bit I still think is disapointing is that you have to order it to get the PSM knocked back 50% and the quicker throttle. What if you want quick throttle but not Chrono?
Cheers Jonathan
I was at Goodwood today and hitched a few laps with a chap who uses his Chrono to time his laps and it seamed to work fine. Just a couple of flicks of the stalk at the beginning of each lap. From what I could see it worked very well. The bit I still think is disapointing is that you have to order it to get the PSM knocked back 50% and the quicker throttle. What if you want quick throttle but not Chrono?
Cheers Jonathan
jcosh
New member
Do you know if PSM can be switched off completly on a PSAM car as well? The car I went in today had PSAM and went very well around Goodwood.
I am very interested to fully understand the differences between the sports suspension and PSAM. Coming from at GT3RS I was thinking that the sports suspension would suit me better. Can you tell me why you specced sports suspension and how it compares to PSAM. Thanks in advance.
Cheers Jonathan.
dereksharpuk
New member
As far as I understand, you cannot turn PSM off totally. Certain parts will cut in if you lose complete control of the vehicle.
Sports suspension is a conventional set-up but lowered 20mm, firmer shocks, stiffer springs and locking differential. I just prefer suspension to be tighter, consistent and a more pure ride without lots of electronic intervention. For everyday motoring the PASM equiped cars are probably the better choice. However for an ex GT3RS pilot the sports version may make you feel more at home.
Derek's comprehensive article on sport chrono didn't mention the other added features included such as programmable memory functions and auto wipers etc. if you have those options loaded on the car. I suspect those capabilities were held back for the chrono buyers to help justify the price.
jcosh
New member
So how does sports suspension feel on the road? I once drove a PSAM car in sports mode on the road and it was terrible - far to hard for anything other than the track. Do you use your car on the track? If so I asume that it would be as good if not better than a PSAM car because of the LSDiff.
Sports suspension is very firm. I have not tried both systems back to back but would estimate that PASM in sport mode is softer sprung but harsher damping. The lower centre of gravity and the trick diff of the sports suspension are plus points as you well know. Best you try for yourself, but finding a sport suspended demonstrator may prove difficult. I have not used my car on track as yet. That will have to wait until next year.
dereksharpuk
New member
If you read my article 'Handling Devices' (PP June 2005), you will note that PASM adapts itself to the road surface. On a rough road it will be softer than on a smooth track. Just what you want. It certainly is harsh on a public road, but you don't notice it on track. That is the beauty of it. It really is the suspension for all surfaces. GT3 hard when you want it and Citrone smooth when the going gets rough. I would never spec a car without it, though have to admit that I have not tried the limited slip diff on track yet. Moreover, I suppose it all comes down to how often you take your car on track. If, like me, you only do 2 - 3 days per year, PASM is better than Sports Suspension. At least in my humble opinion!!
I recently drove PASM equipped and sports suspension equipped cars back to back at Millbrook on the driving experience day. I drove the PASM car on normal setting first and then the sport suspension car. The latter was very firm/hard at normal speed but excellent on the alpine circuit there. I personally would find the sports suspension car tiresome on the road as it really does rattle your dentures (as does PASM in Sport mode) and you feel everything in the road which is great if that is what you want. If I was specing a car for track use I would go for the sports suspension but for road use with the occaisional track day I would go for the PASM car. I agree with the comment from Geoff that PASM in sport mode is softer sprung with harsher damping. My own car is PASM equipped and I think it is great for the road but its a shame PASM in sport mode doesnt also lower the car another 10mm for track use
Sorry forgot to mention in my last note that if you are considering specing the car with sports suspension then in my opinion you must try a car with this suspension first as it is very different to the PASM car (and you cant switch sports suspension off). When I drove the two systems back to back the difference was very marked after just a few yards driving. I think the majority of cars are PASM equipped but the OPC's are still doing Test Drive Plus where you may be able to get to drive a sports suspension car. I am sure they will accomodate you if they think they can get an order for a 997
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