PTV & 4W Steering - Surely not?

[Lancerlot]

I have been told categorically the new 991 Turbo/Turbo 'S' have PTV. [8|]

This system came originally from F1 and increases dynamic performance and stability by varying the distribution of torque to the rear wheels and includes a mechanically locking rear differential.

When the car is driven assertively into a corner, moderate brake pressure is applied to the inside rear wheel. Consequently, a greater amount of drive force is distributed to the outside rear wheel, inducing an additional rotational pulse (yaw movement) around the vehicle's vertical axis. This results in a direct and sporty steering action as the car enters the corner.

At low and medium vehicle speeds, PTV significantly increases agility and steering precision. At high speeds and when accelerating out of corners, the rear differential lock ensures greater driving stability on a range of surface conditions, including the wet and snow. []

The results are stability, easier handling and better traction as well as greater agility.

But 4 wheel steering has been developed as an alternative system, hasn't it? There's surely no need for both systems and nowhere in the technical bumpf currently coming through , is there any reference to PTV. []

We been given erroneous information regarding manual transmission being available when it isn.t. As Centres are asking for £10K reservation deposits, do they yet know what they're actually selling? Do they yet have a vehicle allocation or delivery dates?

There seems to be an expectation of a rather large "leap of faith" from potential customers. []

Regards,

Clive.

 

[tscaptain]

ORIGINAL: Lancerlot


There seems to be an expectation of a rather large "leap of faith" from potential customers. []

Nothing new there then! The GT3 has PTV+ as standard in conjunction with the 4 wheel steer so why not the Turbo?

Porsche Torque Vectoring Plus is fitted as standard and has been specially adapted to the new 911 GT3. It operates in conjunction with an electronically regulated and fully variable rear differential lock. Numerous driving parameter inputs are the basis for the system's active control outputs. The results are perceptible, particularly at the limits of dynamic performance: greater traction, increased lateral dynamics and a significant improvement in driving stability under the effects of load changes in corners and when the car changes lane. On surfaces with less grip, such as in the wet, the system strategically brakes the right or left rear wheel. This means that, whenever the car enters a corner, brake pressure is applied to the inside rear wheel. Consequently, a greater amount of drive force is distributed to the outside rear wheel. This improves steering behaviour and increases agility.

I also note that the "S" comes with PDCC as standard where as it is an option on the turbo. I liked the system when I drove the 991 C2S but I know it's not everyone's cuppa. So if you want good old fashioned ARBs you had better spec up a turbo!

 

[garyw]

ORIGINAL: Lancerlot
There seems to be an expectation of a rather large "leap of faith" from potential customers. []

It is for me...[]

 

[Motorhead]

Clive,

I think it's important to note that:

[PTV] operates in conjunction with an electronically regulated and fully variable rear differential lock.

No doubt Porsche's chassis development wizards have worked hard to iron out what might seem to be potential conflicts by using electronic jiggery-pokery.

Jeff

 

[pwebb]

ORIGINAL: Lancerlot

As Centres are asking for £10K reservation deposits, do they yet know what they're actually selling? Do they yet have a vehicle allocation or delivery dates?

Regards,

Clive.

A friend of mine has had a letter of intent in at his opc for a while, paid deposit in the last couple of days and has September delivery offered.

 

[Lancerlot]

Indeed and I'm sure Centres all over the country have done the same. I've heard of at least one taking 6 deposits on the day the cars were announced. [] Why wouldn't they? Holding hundreds of thousands, perhaps millions, of pounds on an interest free basis for 6 months + has got to be good business for someone.

But not one of these Centres know what their allocation will be. Also, they are unable to give firm delivery dates and won't commit to fixed PX deals. Even Porsche don't know how many cars are coming to UK until they've gauged the demand.

There's conflicting technical info. the announcement was rushed through because of press leakages and all this leads me to believe it takes a giant leap of faith by Porsche customers to place an order under these circumstances.[8|]

Regards,

Clive.

 

[pwebb]

But this is pretty standard stuff Clive, with all the new car launches that we have seen from Porsche the first cars are inevitably a 'leap of faith' to some degree or other. My 991 was ordered sight unseen and there a couple of things I would have changed if I'd tested the car first and of course the steering was an unknown quantity. This is always the conundrum - take a car early in it's life cycle and have a current model for the duration, or get the benefit of development and upgrades and take a car later in the cycle []

Porsche are obviously getting a bit peed off with dealers/press releasing information so are playing their cards closer to their chest than used to be the case. As we know the OPC's don't now have info before the factory release it to the world. So the fact they aren't committing to dates/px etc is not surprising if the factory aren't telling them.

 

[Lancerlot]

All part of a consumers' revolution started by grumpy old men, who think the buyer should be treated as king in the depths of a recession. [8|]

All old fashioned I know and I'm sure we'll get over it. []

Regards,

Clive.