PTV

[nsm3]

Anyone managed to test a like for like car, but one with and one without the torque vectoring system?

Be interested to know if the difference is marginal or significant?

[mhh]

nsm3 said:

Anyone managed to test a like for like car, but one with and one without the torque vectoring system?

Be interested to know if the difference is marginal or significant?

I ordered PTV on my Boxster S and the demo I drove didn't have it. You can only feel the difference when you are pressing on. I'd call it marginal, but it is there.

[nsm3]

Cheers for that. I checked the test car spec with the OPC and it was included, so another £890 onto my bill.

I was very impressed with the demo car response and handling across my usual routes, so didn't want to take the risk of leaving it off. Didn't affect my delivery date either

[spareparts]

I had a 7.2 C4 GTS without PTV.
I replaced it with a 7.2 TurboS that comes with PTV.

Have driven both at the Ring and on track in anger. PTV makes a significant and very noticeable difference that you can feel in fast road driving and when pushing the car. Overall, it makes the same chassis feel more mid-engined by making the rear of the car more agile in directional changes. In a non-PTV 911, the rear of the car feels heavily anchored at the back. In the PTV chassis, stability is still there, but the car feels lighter on its feet through the increased agility. It's a brilliant piece of technology that really aides the dynamics of the 911.

[Martian O]

I'm going to try these on my 997.1 Turbo.

[Goofnik]

Remember, PTV isn't just PTV. It's a mechanical LSD that *also* has torque vectoring.

If you want a limited-slip diff (and you do), get PTV. The torque-vectoring is an added bonus.

[spareparts]

Goofnik said:

Remember, PTV isn't just PTV. It's a mechanical LSD that *also* has torque vectoring.

If you want a limited-slip diff (and you do), get PTV. The torque-vectoring is an added bonus.

Not quite right.

Note that you can have the mechanical LSD without PTV. eg, the GTS4 I had had a mechanical rear LSD without the PTV. In that application, the LSD works as normal: ie, locking both rear wheel axles when one starts to slip/rotate faster than the other.

PTV first works by providing independent braking of the inside rear wheel to send torque to the outside wheel, and it provides a form of rear wheel steer. When there is slip, however, it activates the mechanical diff. In fact, PTV sort of does the exact opposite of what a normal mechanical LSD does.

PTV Plus provides more adjustability as it is electronic.

Porsche explains it here - http://www.porscheownersmanuals.com/2012-911-carre...

And another simple article here:
http://www.excellence-mag.com/of-note/youve-got-op...

[SFO]

PTV became standard with LSD on 991 and 981 cars.

[spareparts]

SFO said:

PTV became standard with LSD on 991 and 981 cars.

You can't have PTV without an LSD.