Tire pressure/temperture question

[DkBG]

When the weather went from hot down to the 60's my tire sensors showed low presure . I aired them up and things seemed fine for awhile . Now it's in the 20's and the DIC shows low on all four again . Doe's the temperature make this much difference or are my tires starting to loose air due to age . @25,000 miles . Cliff

 

[Yellow96]

Tire pressure

The colder it gets-the pressure goes down--I lost 2lbs.--I keep them at at 30lbs.---

 

[FLIR_man]

Think of your physics lessons for (hot) water. As the temperature rises the water molecules get excited and expand. In a closed container like your radiator that’s increased pressure. Air in your tire reacts the same way as water in the radiator, higher temperatures, thus higher pressures.:Twist

 

[MAC5]

Most tire information out there says you loose or gain approximately 1 pound of pressure for every 10 degree change in outside temperature. 30 degree drop amounts to about 3 lbs drop in pressure.

MAC

 

[DkBG]

Thanks Guys ! Cliff

 

[Ctfoodguy2000]

Cliff - I just went out & got a very good tire gauge. With the colder air ( 20's & 30's) here in Ct, the tire pressure was at 27 lbs.
I checked first thing in morning, cold, and inflated to 30psi.

 

[les]

Yep, same here. I was running about 27LBS this weekend. Added a few pounds.

 

[danl72]

Yep, it has to do with the temps dropping. Sometimes in the morning when it is cold my rear tires say there is only 25 psi. I put air in them and it still says that , but after a while it says 30 psi.

 

[DkBG]

Well ,ok guys , let me ask you this then . After I go a few miles the preasure goes up a couple of pounds . Of course , thats because of the tires heating up , right ? So should we air up to 30# cold as foodguy did or 28# allowing for the change . I realize this isn't alot of difference , but hey , we're talking Corvettes here . Cliff

 

[Ctfoodguy2000]

According to the tire "experts", tire pressure is supposed to be checked cold; less then 1 mile driven. That is the advise that I follow since they are the experts; I'm not.

 

[rph b/b 01]

There was a thread awhile back ( I can not remember what the guy's name was ) and he was talking about the excessive wear on the center of the rear tires and inside of the fronts. He was going to lower the pressure in the rears to see if that made a difference in the excessive wear. It would seem right that if you inflated to 30 lb. cold and it heated up to 34-35 that you would get excessive wear in the center. ( Our summers get to 95 -100 ). I would like to know if this is working for you. I have been running 27lb. and they heat up to 30-31lb in the summer. It is now approaching winter so I will increase up to 28 -29lb and see if this keeps it at 30lb when heated up. I hope this keeps the excessive center wear down.

 

[Tomrw]

In general, you will loose about 1 psi for every 10 degress drop in temperature. With a good gauge check the tires cold ( Less that i mile of driving) and keep them at 30psi.
Good Luck
Tom