RE: Tire PSI ?

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RE: Tire PSI ? - 2/6/2008 10:50:14 AM    falkore24 Posts: 5950 Joined: 8/16/2007 From: Wayne, NJ Status: offline Warm/hot pressure is unreliable and incosistant.  Always check pressure cold. If you take a bunch of right turns on the way to the gas station, the left tires will be warmer.  Maybe not enough to make a differance, maybe so.  Better off having a solid number to base your pressures on.  ...... unless you have computerized datalogging capabilities tied to a TPM system, but only race teams have that ..... and very few of them even. _____________________________ 2006 Scion TC (ZPI-18G pending) 2000 V6-AT (RIP 3G) Temp Search thanks to Finch13 (in reply to Fish Hunter) Post #: 16

RE: Tire PSI ? - 2/6/2008 1:11:13 PM    Fish Hunter Posts: 20 Joined: 2/5/2008 Status: offline The rule of thumb is check them cold. IMHO, tires are driven more when they are warm than cold. If you set them when cold,  each tire will expand the air differently when warm, hence when checked cold some tires will not heat proportionaitly to all four tires when warm. So if you wanted two lbs less in the rear and you set it to that at cold, when the tires are warm, them final driving temp will be different. About 1lb increase for every 10 degrees. Best to check both. I guess is the max tire pressure for hot or cold setting? Again, this is just MHO. _____________________________ 94, 97 and 08 Accord, 04 MDX, 93 4Runner 4x4, 05, 07 Civic. (in reply to Fish Hunter) Post #: 17

RE: Tire PSI ? - 2/7/2008 9:04:41 AM    falkore24 Posts: 5950 Joined: 8/16/2007 From: Wayne, NJ Status: offline I'm not sure, but I think that the max pressure rating of the tire is an absolute number, meaning that it applies to hot or cold. ..... MAX psi.  I understand your point about drive tires warming more than non-drive tires.  I also agree with taking note of hot pressures, but the cold numbers should be use for setting the pressures for consistancy as noted earlier. _____________________________ 2006 Scion TC (ZPI-18G pending) 2000 V6-AT (RIP 3G) Temp Search thanks to Finch13 (in reply to Fish Hunter) Post #: 18

RE: Tire PSI ? - 2/7/2008 10:21:17 AM    Catcanski   Posts: 12 Joined: 10/9/2007 Status: offline I like to paint and mud idea.  Actually, running my tires the way I have (at the 1-2 psi below max) over the last 10 years or so with proper rotation and balancing has gone really quite well.  The tires are lasting as they should with no wear or suspension problems.  (knock on wood) (in reply to Fish Hunter) Post #: 19

RE: Tire PSI ? - 2/9/2008 5:33:37 PM    RogerB34   Posts: 65 Joined: 4/10/2007 Status: offline Pressure on the tire is max cold only.  Isn't applicable to a warm tire. (in reply to falkore24) Post #: 20

RE: Tire PSI ? - 3/13/2008 10:34:05 PM    loki   Posts: 38 Joined: 9/9/2007 From: Prescott AZ Status: offline From the owners manual-short version, check air psi after sitting at least 3 hrs or driven less than 1 mile. Add /release psi to recommended cold psi. run them under and they wear unevenly and reduce fuel economy,may fail from overheating. Run them over, ride is harsh, prone to damage, and wear uneven. I myself bought a good tire gauge and check every time I wash the car and with a weather change. With every 10 degrees weather change your tire psi will also change by one degree. Next to having proper fluid levels tire psi should be at the top of the list of importance _____________________________ 08 Accord 6 cyl coupe, 07 SRT Jeep TSW chrome wheels Magnaflow exhaust tinted windows (in reply to RogerB34) Post #: 21

RE: Tire PSI ? - 3/14/2008 10:11:32 PM    loki   Posts: 38 Joined: 9/9/2007 From: Prescott AZ Status: offline I meant to say for every 10 degrees of weather change the tires will change by one pound of pressure. _____________________________ 08 Accord 6 cyl coupe, 07 SRT Jeep TSW chrome wheels Magnaflow exhaust tinted windows (in reply to loki) Post #: 22

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