[Healeys] Conclave tire pressure change

[Richard Collins]

Au contraire:
Temperature has a lot to do with it:
When I run my car (not the Healey), depending on track temperature and speed my tires will gain 4 to 10 lbs of air pressure per session but not necessarily equally dependent on the road course and corners.

Regards,
Richard C
BN7 440

> On May 24, 2021, at 17:07, richard mayor via Healeys <healeys at autox.team.net> wrote:
> 
> 
> Who knew this would have any controversy?  The tire pressure change had nothing to do with temperature.  The only difference is in altitude. Just like the percentage change of oxygen in the air as you go up in altitude, there is a change in the atmospheric pressure as you go up in altitude .... they both go down.   The pressure in the tire, as measured by the gauge, is relative to the ambient pressure.  I knew this before leaving Portland so I lowered the pressure in all my tires to 29 psi.  I had assumed that the pressure would go up about 3 pounds.  It actually went up 4 pounds. 
> 
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