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MLB9911
Newbie


Joined: 09 Jun 2018
Posts: 40
Location: Hertfordshire


PostPosted: Sun Sep 23, 2018 10:21 am    Post subject: Tyre pressure Reply with quote

so when the manual says the tyre pressure should be X when "cold" @ 20C - is that after a mile or two "normal" driving? I have a 991.1 C4S so normal pressure is 2.2 front and 2.6 rear which they never are at start up but do get up to those pressures after a few miles......or am I being to ***** about !! Question Embarassed
 
  
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911TEL
Barcelona


Joined: 29 Oct 2007
Posts: 1476
Location: Inverness & Kazakhstan

2011 Porsche 997 Turbo S

PostPosted: Sun Sep 23, 2018 5:20 pm    Post subject: Reply with quote

Pressures are best taken after car has stood still ( I take mine first thing in morning before sun is on the car or tyres ( if outside, but obviously better in garage) not after having been driven ....
I find it’s quite usual in my area that the inside garage temp is conveniently about 20degrees.
Although the normal temp stayed by manufacturers is as you stated 20 deg c.which is the datum point they utilise.
You can adjust for whatever the ambient is.I usually do this in winter if checking pressures ...
Have a google , there is plenty of info such as this ......

https://www.tyresizecalculator.com/tyres/tyre-pressure-in-the-summer
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MLB9911
Newbie


Joined: 09 Jun 2018
Posts: 40
Location: Hertfordshire


PostPosted: Thu Sep 27, 2018 2:23 pm    Post subject: Reply with quote

thank you
 
  
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