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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: SubLGT] #4972607 01/07/19 08:46 PM
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UG_Passat Offline
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So, Porsche didn't think to use the windshield wipers to active "wet mode", so instead, in typical German fashion, made things overly complicated?


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: UG_Passat] #4972625 01/07/19 09:03 PM
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Originally Posted by UG_Passat
So, Porsche didn't think to use the windshield wipers to active "wet mode", so instead, in typical German fashion, made things overly complicated?




This would have been a great way to activate the system automatically.

A driver can suddenly drive over a portion of road that does not drain well. So in that moment when you feel the car hydroplaning you reach for the button and activate the Wet Mode? It’s too late.

On the Mazda awd system, if the wipers are going and the temperature is 35F or lower the system assumes that the roads are icy or snow covered. Predictive systems are better in these situations.

Now I can understand somewhat why Porsche would not do this. It might take away from the performance.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: fdcg27] #4972632 01/07/19 09:06 PM
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Originally Posted by fdcg27
Originally Posted by d00df00d
Originally Posted by fdcg27
It's just that we've all experienced hydroplaning and this Porsche system seems unlikely to do much to ameliorate it.

How so?


Might just as well ask you how it will.
Seems as though it won't do much if anything.
Not a while lot that can be done to prevent hydroplaning in water more than a quarter inch or so in depth.

More downforce to increase ground pressure

Softer torque buildup and (for AWD) more front-biased power delivery to reduce the odds of sudden breakaway in the back

Lower activation threshold for stability and traction control for faster and more positive intervention


Seems pretty plausible to me.

No, it probably won't save a recklessly inattentive idiot doing 150 through deep standing water. And smoke detectors probably won't save you if you take too much Ambien while a toddler plays with a flamethrower downstairs. And chemo probably won't save you from stage IV pancreatic cancer. And a bulletproof vest probably won't save a cop from a bomb. So what?


2008 BMW M3 Sedan 6MT
Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: d00df00d] #4973533 01/08/19 07:48 PM
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fdcg27 Offline
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Originally Posted by d00df00d
Originally Posted by fdcg27
Originally Posted by d00df00d
Originally Posted by fdcg27
It's just that we've all experienced hydroplaning and this Porsche system seems unlikely to do much to ameliorate it.

How so?


Might just as well ask you how it will.
Seems as though it won't do much if anything.
Not a while lot that can be done to prevent hydroplaning in water more than a quarter inch or so in depth.

More downforce to increase ground pressure

Softer torque buildup and (for AWD) more front-biased power delivery to reduce the odds of sudden breakaway in the back

Lower activation threshold for stability and traction control for faster and more positive intervention


Seems pretty plausible to me.

No, it probably won't save a recklessly inattentive idiot doing 150 through deep standing water. And smoke detectors probably won't save you if you take too much Ambien while a toddler plays with a flamethrower downstairs. And chemo probably won't save you from stage IV pancreatic cancer. And a bulletproof vest probably won't save a cop from a bomb. So what?


More like an immeasurably small increase in downforce within the dimensional limitations of the aero aids that could be deployed and less power which the driver will defeat with his right foot when he sees the car slowing.
More drive to the front will accomplish nothing, since anyone with much FWD experience has seen the engine rev up in hydroplaning encounters. I know that I have.
The rest of your post is irredeemably silly and undeserving of any response.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: SubLGT] #4973539 01/08/19 07:55 PM
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PeterPolyol Offline
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Seems like Porsche engineers were looking for a practical use for their 'wet tires' microphone sensor rather than looking for (yet) another way to detect wet roads for the purpose of fiddling with ESC and aero settings. The method to determine wet tires is indeed clever, but also pretty useless. 2cents

Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: fdcg27] #4973661 01/08/19 09:28 PM
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Originally Posted by fdcg27
More like an immeasurably small increase in downforce within the dimensional limitations of the aero aids that could be deployed and less power which the driver will defeat with his right foot when he sees the car slowing.
More drive to the front will accomplish nothing, since anyone with much FWD experience has seen the engine rev up in hydroplaning encounters.

Not less power. Less abrupt power onset.

Is there seriously not a bone in your body that says "this doesn't seem to me like it'd work, but Porsche obviously knows what they're doing, so maybe I should give them the benefit of the doubt"? Or do you think you're perceptive enough to read one third-party article and conclude that some of the best engineers in the world are producing something with no merit whatsoever?

The rest of my post was analogy. The fact that something doesn't save you from the worst possible scenario doesn't mean it's useless.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: SubLGT] #4973815 01/09/19 01:46 AM
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Nope, not useless, just a bit excessive IMO.

Just as ABS can't stop you when there is no traction on ice, this setup won't save an idjit driver. Another great example of too many electronic nannies which may give aforementioned idjit a false sense of confidence.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: d00df00d] #4975375 01/10/19 06:33 PM
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fdcg27 Offline
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Originally Posted by d00df00d
Originally Posted by fdcg27
More like an immeasurably small increase in downforce within the dimensional limitations of the aero aids that could be deployed and less power which the driver will defeat with his right foot when he sees the car slowing.
More drive to the front will accomplish nothing, since anyone with much FWD experience has seen the engine rev up in hydroplaning encounters.

Not less power. Less abrupt power onset.

Is there seriously not a bone in your body that says "this doesn't seem to me like it'd work, but Porsche obviously knows what they're doing, so maybe I should give them the benefit of the doubt"? Or do you think you're perceptive enough to read one third-party article and conclude that some of the best engineers in the world are producing something with no merit whatsoever?

The rest of my post was analogy. The fact that something doesn't save you from the worst possible scenario doesn't mean it's useless.



I suspect that the Porsche folks have come up with the best solution they could for a difficult problem.
The quality of their engineers is debatable, since cost no object engineering isn't all that hard.
Whether this setup will actually do anything would require that you drive a car so equipped in the prolonged heavy rain conditions that typically bring hydroplaning events.
Would this system do something?
Maybe.
Would it eliminate hydroplaning at moderate highway speeds?
I doubt it.
Been their, experienced it even on good tires and while I found hydroplaning to be a quickly over with non-event, I know I didn't like it.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: SubLGT] #4975383 01/10/19 06:39 PM
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PimTac Offline
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A good example would be driving on grooved pavement in heavy rain. I would wonder if the system would detect the different sound pattern of grooved pavement vs regular pavement?

In the places around here that utilize grooved pavement I drive with caution. They say it’s for better drainage but I think there is reduced contact between tire and pavement. Add heavy rain and it’s a mess.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: fdcg27] #4975419 01/10/19 07:20 PM
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Originally Posted by fdcg27
The quality of their engineers is debatable, since cost no object engineering isn't all that hard.

Would Porsche as profitable as it is if cost were no object? I don't think so.

Originally Posted by fdcg27
Would this system do something?
Maybe.
Would it eliminate hydroplaning at moderate highway speeds?
I doubt it.

They don't claim it eliminates anything. They just claim it helps, which I think you'd agree is pretty plausible.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: PimTac] #4975441 01/10/19 07:38 PM
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Originally Posted by PimTac
A good example would be driving on grooved pavement in heavy rain. I would wonder if the system would detect the different sound pattern of grooved pavement vs regular pavement?

In the places around here that utilize grooved pavement I drive with caution. They say it’s for better drainage but I think there is reduced contact between tire and pavement. Add heavy rain and it’s a mess.

Grooved pavement does reduce contact area but it also drastically increases ground pressure. Net result is less grip in most conditions, but far less risk of hydroplaning in very heavy rain.

Overall, I don't like it, either -- though I see the argument for it in some cases.


2008 BMW M3 Sedan 6MT
Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: SubLGT] #4976294 01/11/19 05:04 PM
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DGXR Offline
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It seems there is no end to the nannies.
Lane departure... the car steers for you.
Automatic Braking... ugh.
Drowsy stopper... vibrates seat and steering wheel... wake up dummy! Wow.
Even the low fuel warning light... umm... it has a fuel gauge, right?
The auto industry is actively working on more ways to protect us from ourselves. And most of all, let us remember that we did this to ourselves.
At what point will we realize we all have ADD and we simply aren't able to watch the road anymore, and we all should be in autonomous vehicles?
Like the article that says we should put something important in the back seat to remind us that our kids are back there. Yes, we are doing this to ourselves.

Originally Posted by Pelican
Mine has a system that can be transferred from car to car it's called "My Right Foot" it works wonderfully especially when connected to the optional "Common Sense" application, that makes it foolproof !


*sigh* I miss the good old days... smart, courteous driving and common sense are GONE.


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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: SubLGT] #5087401 04/26/19 04:42 PM
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splinter Offline
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Pretty nifty.

911 Wet Mode.jpg

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Re: Porsche "Wet Mode" to Reduce Hydroplaning [Re: splinter] #5087496 04/26/19 06:08 PM
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^ Nifty indeed! Thanks for posting.


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