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Re: Carrera4 new AWD system coming
Correction:
Sorry, his mistake, according to my uncle, The new AWD will start with the 911 Turbo. The old (current) AWD system is a viscous coupling - not electronic control. The new coupling we supply is electronically controlled. It has improve acceleration because torque is delivered to the front tires with minimum rear wheel slip. And it's tied to the stability controls (PSM) to use torque to improve stability instead of just using the brakes.
Sorry, his mistake, according to my uncle, The new AWD will start with the 911 Turbo. The old (current) AWD system is a viscous coupling - not electronic control. The new coupling we supply is electronically controlled. It has improve acceleration because torque is delivered to the front tires with minimum rear wheel slip. And it's tied to the stability controls (PSM) to use torque to improve stability instead of just using the brakes.
Re: Carrera4 new AWD system coming
Please ask him about when the new system is to trickle down to regular C4s! 
I will be in the market for a C4 Targa at the end of the year. I'm still pondering whether to wait for DSG or not. If I have to wait 6 more months to get DSG AND the new AWD system, I will happily wait until then. If the new AWD system is coming this year, I will probably skip the DSG thing.
I will be in the market for a C4 Targa at the end of the year. I'm still pondering whether to wait for DSG or not. If I have to wait 6 more months to get DSG AND the new AWD system, I will happily wait until then. If the new AWD system is coming this year, I will probably skip the DSG thing.
Re: Carrera4 new AWD system coming
The reason why my uncle said it's secret it's because he said Porsche's strategy is not to let this kind of information out for it will cause them to lose business - (people will wait for the new technology.)
He first said it will be available in June but then retracted and said it's only on the new Turbo... I don't know if he is pulling my leg either...
He first said it will be available in June but then retracted and said it's only on the new Turbo... I don't know if he is pulling my leg either...
Old news I think
When the car mags (Car, Evo, Top Gear) have been pretty clear already that the awd system in the new TT has an electronic center diff, and can apportion torque 100% to either end. It's also supposed to be lighter according to them too.
Check with the Rennlist TT forum, maybe they see it differently.
Check with the Rennlist TT forum, maybe they see it differently.
Apr 6, 2006 8:45:27 PM
- stubenhocker
- Pilot
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- Loc: PDX USA
- Posts: 393, Gallery
- Registered on: Nov 13, 2005
- Reply to: Le Chef
Re: Carrera4 new AWD system coming
Quote:
colonel said:
See, I don't know how many people in his company know the info. If it's only a handful, then PAG can probably deduce it.
Thanks for the info.
You're right, it's often very easy to find out where leaks are coming from. Especially if management tells each person involved a slightly different story, then they only have to find out which version makes it to the press.
As RC mentioned in his Flat6 interview, Rennteam often chooses not to publish some details out of concern for their sources.
Re: Carrera4 new AWD system coming
Quote:
da duke said:
I not sure if this information is correct.
I have been told by porsche that the current 997T AWD system was tested on the C4's first and this same system is on the current 997 C4s.
No, that is not correct. The AWD systems are not the same on the Turbo and Carrera 4. The 997 Turbo has an electronic AWD system and the Carrera 4 has an oil based viscous AWD system. I assume the electronic system will be introduced on the Carrera 4 at some point and that this is the system from Borg-Warner.
Re: Carrera4 new AWD system coming
Its interesting to see just how much critical technology on the 997TT is not German in origin.
Both the VTG and AWD systems are licensed from USA companies - Honeywell and Borg Warner. The VTG was originally developed by Honeywell USA then licensed to
Borg Warner's German subsidrary. And now the AWD system
is from Borg Warner- a USA company.
The seats and some other interior components are from Lear -a US company.
Even the power seat motors are a GM product.
Does Bilstein license the PASM core technology from GM Delphi also?
If this trend keeps going, they might as well just build the cars in Kentucky.
Both the VTG and AWD systems are licensed from USA companies - Honeywell and Borg Warner. The VTG was originally developed by Honeywell USA then licensed to
Borg Warner's German subsidrary. And now the AWD system
is from Borg Warner- a USA company.
The seats and some other interior components are from Lear -a US company.
Even the power seat motors are a GM product.
Does Bilstein license the PASM core technology from GM Delphi also?
If this trend keeps going, they might as well just build the cars in Kentucky.
Re: Carrera4 new AWD system coming
How about checking the Porsche website, that might be a good idea, instead of having these useless "I think that/I heard that.." discussions 
From Porsche.co.uk:
http://www.porsche.com/uk/models/911/911-turbo/indetail/drive/
From Porsche.co.uk:
Quote:
Porsche Traction Managment
Genuine high performance calls for more than just a powerful engine. It also requires an effective means of applying that power to the road. On the 911 Turbo, this is achieved by means of permanent all-wheel drive and an all-new version of Porsche Traction Management (PTM). The key mechanical feature within the AWD system is the electronically controlled multi-plate clutch. Integral functions within PTM include an automatic brake differential (ABD) and anti-slip regulation (ASR).
The electronically controlled clutch is used to vary the drive torque transmitted to the front axle. The previous 911 Turbo had a multi-plate clutch filled with a viscous fluid, which 'passively' determined the front/rear torque split. On this latest evolution, the fluid is replaced by active, electronic control.
While the viscous-fluid system responds to relative differences in front/rear axle speed, the new electronic clutch offers a more direct response to changing road scenarios. The status of the car is continuously monitored with the aid of on-board sensors. These are used to measure a range of values, including the rotational speed of all four wheels, the lateral and longitudinal acceleration of the car, and the current steering angle. The sensor data is analysed in 'real time' by PTM, enabling immediate adjustments in front-end drive torque as and when required. If, for example, the rear wheels lose traction under acceleration, a greater proportion of drive torque is automatically transmitted to the front axle. The integral ASR function is also used to minimise wheel-spin. When cornering, the system controls drive to the front wheels in order to maintain optimum lateral grip. On variable-grip surfaces, traction is enhanced using the automatic brake differential (ABD) function. For optimum traction, manual gearbox cars can also be equipped with an optional mechanical limited-slip rear differential.
Assisting PTM is a new and specially uprated version of Porsche Stability Management (PSM). Combined, these systems ensure optimum torque distribution - and thus optimum drive - in every type of road scenario, including high- speed straights, hairpin bends and challenging, variable-grip surfaces. Under heavy braking where ABS is required, the multi-plate clutch severs all front drive so that each front wheel can be controlled separately by the ABS without being influenced by the rear wheel dynamics.
The traction benefits of the new electronically controlled system are particularly apparent in the wet or on snow. In these conditions, the new 911 Turbo offers breathtaking acceleration.
In short, PTM offers greater active safety, greater performance, and even more of the positive handling and agility you'd expect from a 911 Turbo.
http://www.porsche.com/uk/models/911/911-turbo/indetail/drive/
Re: Carrera4 new AWD system coming
"The traction benefits of the new electronically controlled system are particularly apparent in the wet or on snow. In these conditions, the new 911 Turbo offers breathtaking acceleration."
Yes, so confidence inspiring that it will remove the concepts of aquaplaning and tire adhesion from some drivers brains momentarily and eliminate their breathtaking permanently. Perhaps!
Yes, so confidence inspiring that it will remove the concepts of aquaplaning and tire adhesion from some drivers brains momentarily and eliminate their breathtaking permanently. Perhaps!
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