Tire pressure / winter tires / tire noise

f1eng

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Interesting….depends and different for specs model?/tyres?
It does depend on the weight of the car and probably power, but also affects handling.
The recommended pressure may well be tyre make dependant too, on my Ferrari the recommended pressures vary a lot depending on which make of tyre you fit.
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NC_Taycan

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Thanks for that. Checked it and it says 2.6 / 2.3
As a reminder, the pressures on the door label are for full load. If it's just you, go for the partial load pressures. Anywhere between the two is fine though.
 

B61

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As a reminder, the pressures on the door label are for full load. If it's just you, go for the partial load pressures. Anywhere between the two is fine though.
I have different pressures on the label (full load, one-two passengers only), but I don’t remember if there are additional settings for winter tyres as well.
I’ll make photo later.
 

svp6

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I had the P zero in same configuration as OP. I am running them at 2.9-3.1 bar (42-45 PSI). This gives a 4-5% improvement in range - which is a great addition in winter. I did not notice a significant change in car behavior (stiffness, grip etc.), but I don't push hard in general, let alone in winter.
 

jadatis

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Registered to this forum to answer here. Call myself " pigheaded Dutch selfdeclared tyrepressure-specialist " , story began end 2007, when I got hold of the officiall european formula to calculate pressure for load and speed , and went running with it.
Have no Porche , only old cheap car, so wont introduce myself in a seperate topic.

Also the newer construction of tyres, have to follow the rules of nature.
Main goal of pressure-calculation is not to overheat any part of tyre.
If that only happens once, cracks are created, wich tear further in time, whatever you do afterward, mayby leading only after 3 years to blowing tyre or treath seperation.

People who calculate lineair the pressure for the load, are not doing it that bad, officiall calc leads to a bit lower pressure.
I determined a simpler and better system for higher speed used ( higher speed needs higher pressure for same load on tyre).

What I need to calculate is next.
From tyres:
1.maxload or loadindex.
2. Kind of tyre to determine the referencepressure. STANDARD LOAD 2.5 BAR/36psi, XL/Reinforced/Extraload 2,9 bar/42psi.
3. Not most important , speedcode.

From car best real axle( end) loads, but max allowed axleload are used for fully loaded by the carmaker.
And max speed you use, and wont go over for even a minute ( delicate question for Porche users ;) )
To estimate weigt on tyre in normal use, need empty weight and if motor in front or back,and the way you load it ( mostly the persons, load woont ve that much for Porche, I think)

In this topic I see the pressure change function of tmps, new to me.
But from this you can calculate back the temperature in tyre.
I assume its rising to cold measured pressure. Would like more info about it.

Then I question myself if a foamlayer on inside of treath to reduce noice, for electric cars, does not disturb the cooling down of the rubber.
 

B61

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Here’s my label:

99D6FD55-CE61-44E8-8116-B9467BA7903C.jpeg
 
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