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For those of you that have not experienced the joys of PTV and are thinking of it in your new builds, here is a video of it in action.

Overtaking, or more appropriately undertaking an F-Type Jag at Sydney Motorsport Park extended circuit on the very tight hairpin.

Entered way to fast, wanted to put some distance between me and the Jag. Braked way too late and was not on the correct line due to the undertaking manoeuvre.

I expected to understeer off the end of the track, took me completely by surprise that it suddenly pivoted and was pointing in the correct direction.

 

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For those of you that have not experienced the joys of PTV . . . . . Entered way to fast, wanted to put some distance between me and the Jag. Braked way too late and was not on the correct line due to the undertaking manoeuvre. . . .
Hah BJR, I unfortunately (or fortunately) don't have a video, but . . . . there's a 997 Twin Turbo some place in Arizona that may still not be sure what happened to them while they were trying to follow/chase me into a corner.

Did many of the same things you've mentioned and about the time I was wondering how the heck I was going to get everything rotated correctly, was very pleasantly surprised to feel the car "twisted" without spinning me off :) Not so much for the fellow following in the TT following my taillights. I think I am finding that PTV is "good"

Thanks for the video.
 

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Wow great post--it's pretty cool to see videos and posts of objective ways in which an option or aftermarket upgrade makes a difference...

Also I love how you looked into the camera after the PTV save :)


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awesome post and video. I am impressed with PTV
good job :)
 

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Wow great post--it's pretty cool to see videos and posts of objective ways in which an option or aftermarket upgrade makes a difference...

Also I love how you looked into the camera after the PTV save :)


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Although you may right in the bold, red text above, I'd say he was trying to make absolutely sure he had space on the Jag before moving cross-track to the braking/turn-in point for the next corner at the end of a very short chute.

Of course, I have nothing against playing to the camera ...

jeff
 
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Did you have TC turned off? Just curious.
I recently had on a set of extremely noisy Pagid pads, embarrassingly loud, even on the track. Everytime I went through a corner that required no braking I could hear the "chirp" of rear brakes momentarily engaging as the PTV was doing it's thing.
 

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PTV saved my *** in a tight 10mph right hairpin I entered too fast. I braked hard and thought for sure I was going to understeer off the road to the left, but the car kept me in the lane. It was like the car was telling me, "It's cool- I've got this" Blew me away.
 
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Very cool video. That was one of the only options that I had to have on my GTS. One of the most reasonably priced as well.

I can't wait to get my car out on the track once I have logged a few break-in miles. My previous 987S would understeer to no end.
 

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Make sure you get those rear brake ducts!!!

My wife had a track day on Saturday (her first one) and I left on PSM on "Sport" for her al lday, so the rear brakes were getting a workout I am sure in correcting for her mistakes.

It cooked the rear brakes. The calipers are no longer red and piston seals are gone.

For those of you that have not experienced the joys of PTV and are thinking of it in your new builds, here is a video of it in action.

Overtaking, or more appropriately undertaking an F-Type Jag at Sydney Motorsport Park extended circuit on the very tight hairpin.

Entered way to fast, wanted to put some distance between me and the Jag. Braked way too late and was not on the correct line due to the undertaking manoeuvre.

I expected to understeer off the end of the track, took me completely by surprise that it suddenly pivoted and was pointing in the correct direction.

 

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Great video--glad I optioned PTV!
 

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Cool video and glad PTV works for you. Are you sure a car without PTV would have recovered much differently? What would it look like? I have not had the chance to take my non-PTV car to the track and am curious (and also trying to justify not getting the option).
 

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How do you know that wasn't PSM? I thought PSM can also brake the inside wheel? Seems to me that you had way you much steering lock applied and the car realized you were trying to turn left.

PS: Many times you are taking your hands off 9 and 3 when not necessary. It may be causing you to add more lock than necessary which can cause or exacerbate understeer.
 

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Make sure you get those rear brake ducts!!!

My wife had a track day on Saturday (her first one) and I left on PSM on "Sport" for her al lday, so the rear brakes were getting a workout I am sure in correcting for her mistakes.

It cooked the rear brakes. The calipers are no longer red and piston seals are gone.
This also make me think that it was PSM and not PTV at work in the OPs video. I'm all for safety but sometimes these driver aids mask mistakes to the point that the driver cannot improve because they don't know they are making mistakes! I'm no exception.
 

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I was on the fence when I ordered my 15 CS but I did include it along with sport suspension and sports chrno.The 14 CS I traded was also a six speed but with PAsm.I do like the sport suspension and I'll know more about the PTV after I break in the car and get it out of the track.
I ordered it mainly to get a limited slip differential. My concern is overheating the rear brakes on the track..
Couple years ago there was a turbo at the track that cooked the rear brakes. Maybe they have reprogrammed it to be less aggressive. Has anybody had problems Overheating the rear brakes?
carl
 

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This also make me think that it was PSM and not PTV at work in the OPs video. I'm all for safety but sometimes these driver aids mask mistakes to the point that the driver cannot improve because they don't know they are making mistakes! I'm no exception.
After listening to the video, my money is on PSM. The car was not under power when it straightened out. Engine noises started again after the car corrected it's line. PTV should only work when the car is under power. No power = no PTV.
 

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Discussion Starter #18
Although you may right in the bold, red text above, I'd say he was trying to make absolutely sure he had space on the Jag before moving cross-track to the braking/turn-in point for the next corner at the end of a very short chute.

Of course, I have nothing against playing to the camera ...

jeff
You would be 100% correct. The reason I overcooked the corner in the first place was so I would not get rear ended by the Jag. So I was always conscious of keeping well away from him.

Did you have TC turned off? Just curious.
I recently had on a set of extremely noisy Pagid pads, embarrassingly loud, even on the track. Everytime I went through a corner that required no braking I could hear the "chirp" of rear brakes momentarily engaging as the PTV was doing it's thing.
PSM hence traction control was on. I always use Please Save Me except when under instruction by the Porsche Driving school for specific manoeuvres.

How do you know that wasn't PSM? I thought PSM can also brake the inside wheel? Seems to me that you had way you much steering lock applied and the car realized you were trying to turn left.

PS: Many times you are taking your hands off 9 and 3 when not necessary. It may be causing you to add more lock than necessary which can cause or exacerbate understeer.
it was not PSM. PSM will brake all 4 wheels if required. I constantly get chipped by instructors for not using the 9-3 position all the time. But the reality is the cockpit is too snug for me to do this without breaking my arms at the joints.:hilarious:

This also make me think that it was PSM and not PTV at work in the OPs video. I'm all for safety but sometimes these driver aids mask mistakes to the point that the driver cannot improve because they don't know they are making mistakes! I'm no exception.
After listening to the video, my money is on PSM. The car was not under power when it straightened out. Engine noises started again after the car corrected it's line. PTV should only work when the car is under power. No power = no PTV.
It was not PSM. I have had PSM cut in on this corner before on a Porsche Driving School precision plus certification. The instructor berated my for the entry speed that was well above this video.

With PSM it will cut the throttle (in this case it was me) it will pulse brake all four wheels, it will reduce the power steering effort and make it hard to go wild with the lock. It is unmistakable when PSM takes over.

And the other dead giveaway is that the PSM activation warning light will come up on the instruments.

Also PTV will work without throttle input. It would be pretty useless if it didn't, after all its meant to activate on corner entry to the apex. Don't know about you but I'm normally on the brake on corner entry not on the gas. ;)

Thanks all for all the kind responses. I hope to capture more interesting moments on film in my driving career. :thanks::)

:cheers:
 
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PSM does more than I thought it did. Found the following on Porsche.com.


Porsche Stability Management (PSM)



Porsche Stability Management (PSM) is fitted as standard. This system automatically maintains stability and traction even at the limits of dynamic driving performance. Sensors continuously monitor the direction, speed, yaw velocity and lateral acceleration of the car. Using this information, PSM is able to calculate the actual direction of travel at any given moment. If the car begins to oversteer or understeer, PSM applies selective braking on individual wheels in order to restore stability.
When accelerating on wet or low-grip road surfaces, PSM improves traction – as well as agility, control and safety – using the automatic brake differential (ABD) and anti-slip regulation (ASR). Integrated ABS is designed to minimise braking distances.
Want an even sportier drive? Then you can switch off PSM. For your safety, however, PSM remains set to intervene if the vehicle is braked and ABS assistance is required. ABS and ABD remain permanently enabled.
Also included with PSM are engine drag torque control (EDTC), the precharging of the brake system and brake assist. If you suddenly release the accelerator pedal, PSM automatically prepares for your next action: the braking system is precharged so that the brake pads are already in light contact with the brake discs. Maximum braking power is therefore achieved much sooner. Brake assist detects a panic braking situation and generates the brake pressure required for maximum deceleration.
In brief: PSM increases driving stability and safety as well as the agility you have come to expect from a Porsche.




 

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Discussion Starter #20
PSM does more than I thought it did. Found the following on Porsche.com.


Porsche Stability Management (PSM)



Porsche Stability Management (PSM) is fitted as standard. This system automatically maintains stability and traction even at the limits of dynamic driving performance. Sensors continuously monitor the direction, speed, yaw velocity and lateral acceleration of the car. Using this information, PSM is able to calculate the actual direction of travel at any given moment. If the car begins to oversteer or understeer, PSM applies selective braking on individual wheels in order to restore stability.
When accelerating on wet or low-grip road surfaces, PSM improves traction – as well as agility, control and safety – using the automatic brake differential (ABD) and anti-slip regulation (ASR). Integrated ABS is designed to minimise braking distances.
Want an even sportier drive? Then you can switch off PSM. For your safety, however, PSM remains set to intervene if the vehicle is braked and ABS assistance is required. ABS and ABD remain permanently enabled.
Also included with PSM are engine drag torque control (EDTC), the precharging of the brake system and brake assist. If you suddenly release the accelerator pedal, PSM automatically prepares for your next action: the braking system is precharged so that the brake pads are already in light contact with the brake discs. Maximum braking power is therefore achieved much sooner. Brake assist detects a panic braking situation and generates the brake pressure required for maximum deceleration.
In brief: PSM increases driving stability and safety as well as the agility you have come to expect from a Porsche.




PSM is really good. Its not just one system though, its an umbrella of multiple systems.

Also Sports Plus utilises a relaxed PSM setting and its pretty relaxed. You really have to be out of control before it cuts in. I have had some really severe rear end losses and no PSM intervention. I have only experienced PSM intervention when losing the front wheels at Gs. i.e a big 4 wheel drift.

Also the ABS and ABD is outside the umbrella of PSM. The statement "For your safety, however, PSM remains set to intervene if the vehicle is braked and ABS assistance is required. ABS and ABD remain permanently enabled." is misleading. It permanently enabled as it is outside the umbrella. You can get some serious ABS ABD action on track in the braking zone and the PSM light does not come on, at least it has never come on for me.

PSM really helps you find the limits. I practice the racing lines through a corner and keep building up speed to PSM intervention. You then know how fast you can go round that corner.

:cheers:


 
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