PSM and torque vectoring
06-22-2013, 03:52 PM
#1
Rennlist Member
Thread Starter
PSM and torque vectoring
Does turning PSM off also turn off PTV? i have posted before about ptv. I really hate it and every new car I have driven with it. Is there a way to completely disable it from my 997 turbo S? it is really spoiling my enjoyment of the car. I think if you know what you are doing and can drive a 911 well you should be able to disable it. This is the main reason I am staying away from new 991 turbo and 991 GT3. I think they both have PTV standard. If I had known PTV was this intrusive, I would have ordered a regular 997.2 turbo without PTV. I never got to drive the 997.2 turbo S before ordering it, I only drove a turbo without PTV.
06-22-2013, 09:59 PM
#3
Rennlist Member
Thread Starter
As far as I understand PTV brakes a certain wheel during a turn to increase agility through a turn and also includes a limited slip feature. That is why I posted this in the 997 turbo forum. I would like to hear from 997.2 turbo or turbo S owners with Ptv. I also have a My09 997.1 turbo without the ptv so I have something to compare it to. I prefer the handling of my 09 turbo vs MY11 turbo S. The ptv is very intrusive imo.
06-22-2013, 10:19 PM
#4
Rennlist Member
You may be right, but I have no idea..
Porsche Torque Vectoring (PTV).
Porsche Torque Vectoring (standard
on 911 Turbo S models,
optional for 911 Turbo models),
with variable torque distribution
to the rear wheels and a mechanical
limited-slip rear differential,
is a system that actively enhances
vehicle dynamics and stability.
As a function of steering angle
and steering speed, accelerator
pedal position, yaw rate and
vehicle speed, PTV is able to
improve steering response and
steering precision significantly
by specific braking of the right or
left rear wheel.
In simple terms, this means that
when the car is driven assertively
into a corner, moderate brake
pressure is applied to the inside
rear wheel. Consequently, excess
drive force, which varies depending
on the braking force applied
to the inside rear wheel, can be
distributed to the outside rear
wheel, and a rotational pulse (yaw
movement) is generated around
the vehicle’s vertical axis. This
assists the steering input and
results in a more assured steering
manoeuvre(sic).
At low and medium vehicle
speeds, the system significantly
increases agility and steering
precision, whilst at high speeds,
and in combination with the
mechanical limited-slip differential,
it additionally ensures greater
driving stability.
The system, combined with
Porsche Traction Management
(PTM) and Porsche Stability
Management (PSM), also puts
its stabilising (sic) effect to good use
on road surfaces with varying
levels of grip and on snow and ice.
As PTV increases the car’s
dynamic performance, the system
remains active when driving
on the racetrack, even if PSM
has been deactivated.
Where efficiency
is concerned,
this enhanced performance and
stability are achieved without the
need for any additional components,
apart from the mechanical
limited-slip rear differential. In
other words, a more enjoyable
drive with no additional weight.
Porsche Torque Vectoring (PTV).
Porsche Torque Vectoring (standard
on 911 Turbo S models,
optional for 911 Turbo models),
with variable torque distribution
to the rear wheels and a mechanical
limited-slip rear differential,
is a system that actively enhances
vehicle dynamics and stability.
As a function of steering angle
and steering speed, accelerator
pedal position, yaw rate and
vehicle speed, PTV is able to
improve steering response and
steering precision significantly
by specific braking of the right or
left rear wheel.
In simple terms, this means that
when the car is driven assertively
into a corner, moderate brake
pressure is applied to the inside
rear wheel. Consequently, excess
drive force, which varies depending
on the braking force applied
to the inside rear wheel, can be
distributed to the outside rear
wheel, and a rotational pulse (yaw
movement) is generated around
the vehicle’s vertical axis. This
assists the steering input and
results in a more assured steering
manoeuvre(sic).
At low and medium vehicle
speeds, the system significantly
increases agility and steering
precision, whilst at high speeds,
and in combination with the
mechanical limited-slip differential,
it additionally ensures greater
driving stability.
The system, combined with
Porsche Traction Management
(PTM) and Porsche Stability
Management (PSM), also puts
its stabilising (sic) effect to good use
on road surfaces with varying
levels of grip and on snow and ice.
As PTV increases the car’s
dynamic performance, the system
remains active when driving
on the racetrack, even if PSM
has been deactivated.
Where efficiency
is concerned,
this enhanced performance and
stability are achieved without the
need for any additional components,
apart from the mechanical
limited-slip rear differential. In
other words, a more enjoyable
drive with no additional weight.
06-22-2013, 11:15 PM
#5
Rennlist Member
Thread Starter
i have had system checked because it is too intrusive in my particular car. the dealership found no malfunction or problem. i drove one other turbo s and it was a lot better than mine. i need someone in NJ who has one that i can drive to compare or even another owner can drive mine and tell what they think. I just think there is a fault in my ptv that is not been found. Even in the owners manual it say it should be imperceptable to driver. I have about 2000 miles on car.
06-23-2013, 06:43 AM
#6
Rennlist Member
I certainly have not noticed my PTV to be intrusive. I however have definitely noticed a few turns I like to drive aggressively on where my previous car, a 997 C4S would understeer at certain speeds my Turbo S does not.
Walt
Walt
