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dshealey
(Pooh-Bah)
09/18/03 04:18 PM
| IP Address: | 63.120.85.194 | | Message No.: | 102549 |
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Re: Tire pressure/Altitude change??
[re: jayz9705] |
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Sometimes being an engineer is a curse! I certainly was not attacking you in any way! I always want to understand any phenomena that seems to be out of the out of the realm of normality. I was hoping I was missing something and that maybe someone could come up with other reasons for the large pressure difference. It sure would not be the first time I overlooked something important! It could not be altitude change itself., as a 12 PSI differential is 80% of the normal atmospheric pressure differential of 14.7 PSI in it's entirety, from the earth's surface to outer space. Tire temperature would definitely have to be the biggest contributor by far. It would be interesting to see how much change one would get in a tire from one temp. to another. I have seen posts suggesting that from cold to operating temp would change tire pressure somewhere between 5-10%. Don't know how true this is though.
Maybe this "Winter" (This is San Diego  ) I will check my pressure before leaving work one day, noting the temp, then when I arrive at home where I can take the new tire pressure and temp.
This would be a lot easier with the device someone was mentioning in an earlier post, where there was a readout in a car that showed all four tires temperatures and pressures. Wonder if the new Kisan Tire Alert (if it ever sees the light of day) will show temps?
David Shealey
'01 black LTC "BAT BYKE"
San Diego
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