With all this cold weather and global warming, how do we interpret cold tire pressure vs whatever temperture the car tires are really at?
I used the ideal gas laws to compute this chart of how pressures behave at different temperatures.
Using this chart you can find what the pressure change will be between two temperatures.
If you know the pressure at a starting temperature (i.e. the "cold pressure" at say 70 degrees) find that temperature on the horizontal axis. Travel vertically from there to find the pressure on the vertical axis. Find the colored line that crosses that point.
Follow that line... you can see what the pressure will be at any given temperature on the horiz axis, or knowing the temperature, you can see what the pressure will be at that temperature.
For example, My cold inflation temperature is 35 psi at 70 F, so when I got in the car at 25F yesterday I noticed it was 32 PSI on the tires. THe chart conforms this is correct.
I used the ideal gas laws to compute this chart of how pressures behave at different temperatures.
Using this chart you can find what the pressure change will be between two temperatures.
If you know the pressure at a starting temperature (i.e. the "cold pressure" at say 70 degrees) find that temperature on the horizontal axis. Travel vertically from there to find the pressure on the vertical axis. Find the colored line that crosses that point.
Follow that line... you can see what the pressure will be at any given temperature on the horiz axis, or knowing the temperature, you can see what the pressure will be at that temperature.
For example, My cold inflation temperature is 35 psi at 70 F, so when I got in the car at 25F yesterday I noticed it was 32 PSI on the tires. THe chart conforms this is correct.
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