CloseQuote:
bluelines said:
Thanks, interesting explanation. Wonder how good that is for the torque converter?
This means you should be able to achieve the same time with manual, just rev to max torque and let the clutch go, right? Not so good for the clutch, but anyway...
Quote:
mumbasic said:
Porsche could have configured the PTM on a different way:
If the car is not driving, put the maximum allowed torque to the front axle. This way the manual would also benefit from the PTM. After starting the systems control the share of torque as it is doing for both gearboxes.
AM
Quote:
yah said:Quote:
mumbasic said:
Porsche could have configured the PTM on a different way:
If the car is not driving, put the maximum allowed torque to the front axle. This way the manual would also benefit from the PTM. After starting the systems control the share of torque as it is doing for both gearboxes.
AM
Yep, that sounds like a viable way for both gear boxes.
Anyway, I assume that the gearshifts of the tiptronics also attributes to the better 1-100 kph times. The tiptronic should be able to shift while staying in the suitable rev ranges during the shifts. That is, the VTG-turbos will not loose the pressure. That is not possible in the manual. At each shift in a manual you will loose pressure that will have to build up again. In the pre-VTG times this was not possible for the tip as the high torque rev band was much smaller and not as flat as it is now.
Quote:
mumbasic said:Quote:
yah said:
Yep, that sounds like a viable way for both gear boxes.
Anyway, I assume that the gearshifts of the tiptronics also attributes to the better 1-100 kph times. The tiptronic should be able to shift while staying in the suitable rev ranges during the shifts. That is, the VTG-turbos will not loose the pressure. That is not possible in the manual. At each shift in a manual you will loose pressure that will have to build up again. In the pre-VTG times this was not possible for the tip as the high torque rev band was much smaller and not as flat as it is now.
I don't think you are right about acceleration. For both tiptronic and manual you will have only once the chance to use the overboost from 0-200 km/h. Also when shifting, you should stay above the overboost area. Your rpms don't fall behind 5000 rpm. When shifting manual you drive (in my 997 4S X51) to 7200 rpm press clutch, switch gear up and immediately throttle. The engine want fall behind 5000 rpm.
AM
Quote:
KresoF1 said:
Adnan,
There is the reason why is LSD optional for manual only!
I heard that PTM and PSM programming is different with optional LSD on manual... LSD is then part od so called "network" system. TIP may have advantage only in first two gears but, just in STRAIGHT LINE and if you preboost the car with holding its brake pedal with left foot while pressing gas pedal with right foot till around 5500rpm. Split second later quickly release brake pedal and you fly in 3.7s till 100km/h! But, only in straight line and ONLY if you do it the way I described above...
Quote:
Rossi said:Quote:
AUM said:
Turbo
All-weather, all-road excellence and safety.
Faster in a straight line.
GT3
More fun
More involving
Much better sound
Lower ride height
Faster on a track
Concerning GT3:
Cheaper
Quote:
iia said:Quote:
AUM said:
Turbo
All-weather, all-road excellence and safety.
Faster in a straight line.
GT3
...
Faster on a track
I'm wondering who will track GT3 faster than Turbo except prof and may be you!?
Quote:
STRADALE said:
Concerning turbo - A little more comfort. Seats 4 & Convertible. Maybe "faster" on the street vs the track.
Rossi - What's your plans Porsche wise? Is there a turbo/GT2 in your future?
Quote:
No STRADALE, I don't think so. First I'm very pleased with the Carrera S, second I think I'm not a typical Turbo-guy. For the price of a Turbo, I prefer the V8-Ferrari any time (which are roughly same price here in Germany) and in the 911-range the standard 911 (and the AWD version) still look best to me. I somehow don't like the fussy add-ons of the turbo, which ruin the classical, perfect design of the 997 to me, but the car is still a technical highlight, though.
Quote:
Rossi said:Quote:
STRADALE said:
Concerning turbo - A little more comfort. Seats 4 & Convertible. Maybe "faster" on the street vs the track.
Rossi - What's your plans Porsche wise? Is there a turbo/GT2 in your future?
No STRADALE, I don't think so. First I'm very pleased with the Carrera S, second I think I'm not a typical Turbo-guy. For the price of a Turbo, I prefer the V8-Ferrari any time (which are roughly same price here in Germany) and in the 911-range the standard 911 (and the AWD version) still look best to me. I somehow don't like the fussy add-ons of the turbo, which ruin the classical, perfect design of the 997 to me, but the car is still a technical highlight, though.
Quote:
trip said:
Actually the tiptronic is faster off the line because the way the various systems in the car are networked, not because the manuals are detuned. When you want to extract max acceleration from the tip, you power brake the car and the PTM system pre boosts the turbos to eliminate lag. The PTM system realizes that you are doing a standing start launch and sends 258 ft lbs of torque (I think that was the number quoted in Evo) to the front axle for ultimate traction and whole shot launch. The tip also alows for boost to be maintained during shifts so that lag is again reduced. These reasons and maybe some that I forgot to mention, are why the Tip enjoys an acceleration advantage from 0-200kph. After this speed, the power loss from the torque converter and the closer ratios of the 6 speed manual give the stick the advantage.
Quote:
When you want to extract max acceleration from the tip, you power brake the car and the PTM system pre boosts the turbos to eliminate lag
Quote:
The PTM system realizes that you are doing a standing start launch and sends 258 ft lbs of torque (I think that was the number quoted in Evo) to the front axle for ultimate traction and whole shot launch.
Quote:
The tip also alows for boost to be maintained during shifts so that lag is again reduced
Quote:
After this speed, the power loss from the torque converter and the closer ratios of the 6 speed manual give the stick the advantage.
Quote:
trip said:
I think you may be misunderstanding my post. I would prefer the six speed aswell because it is faster 200kph and is available with lsd meaning its faster around tracks like the nurnburing, but the fact is the tip is faster off the line due to the way the sysems are networked. The PTM prepping the front axle is unique to the tiptronic. Read the evo scan, specifically the mini-article describing PTM for better descriptions.
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