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Car Forum / Ford / Ford Mustang / October 2004Cooler Temps > You Checked Your Tire Pressures, Right?
Everyone knows maintaining correct tire pressure is vital for optimum fuel economy, tire longevity and vehicle performance. But did everyone know with the fluctuating/lower temperatures of autumn (and in the springtime with rising temps) that your tire pressures tend to fall...? It's true. Now go out and check 'em. Bet you they're all down a couple psi. Patrick '93 Cobra '83 LTD > Everyone knows maintaining correct tire pressure is vital for optimum > fuel economy, tire longevity and vehicle performance. But did [quoted text clipped - 3 lines] > > Now go out and check 'em. Bet you they're all down a couple psi. Air moves through the semi-permiable material found in rubber tires, and will naturally seep out at a rate of 1-2 PSI per month. The drop in ambient temps will produce something far more dramatic: it's not uncommon to see a drop of 10 or more PSI when temps get chilly out. So much so that tire shops see a big increase in bead integrity problems, where tires drop pressure to the point where they lose bead seating altogether. And I'm sure <ahem> that everyone here checks tire pressure once a month anyway, and knows about this, right? <ahem> -JD >> Everyone knows maintaining correct tire pressure is vital for optimum >> fuel economy, tire longevity and vehicle performance. But did [quoted text clipped - 14 lines] >And I'm sure <ahem> that everyone here checks tire pressure once a month >anyway, and knows about this, right? hehe, riiiight. I can sure tell here in the Phoenix area. When temps start to drop below 100 I see a LOT more blown tires on the road. Tires suffer in the 120 degrees all summer, the dorp in temp/pressure is their death. Remove NO-SPAM from email address when replying > The drop in ambient temps will produce something far more dramatic: it's not > uncommon to see a drop of 10 or more PSI when temps get chilly out. So much > so that tire shops see a big increase in bead integrity problems, where tires > drop pressure to the point where they lose bead seating altogether. For a temperature drop from 85 F (summer day) to 35 F (winter day), I would expect a tire's pressure to drop from 32 to 28 psi due to temperature only. Since this will take 1-3 months, it's roughly equal to the loss due to permeation, imo.  SignatureJohn ThunderSnake #59 If you Reply, be sure and remove the " (DELETE_THIS) " from the email address. > For a temperature drop from 85 F (summer day) to 35 F (winter day), I would > expect a tire's pressure to drop from 32 to 28 psi due to temperature only. > Since this will take 1-3 months, it's roughly equal to the loss due to > permeation, imo. This isn't my experience. I get a 3-5 psi. difference when checking tire pressures between tires that have the sun shining on them, and others that don't. Add permiation of 1-2 psi/mo. to dropping ambient temps, and you can easily end up with a 10+ psi. drop in just a few weeks. Why am I debating this? <scratching head.> -JD > > For a temperature drop from 85 F (summer day) to 35 F (winter day), I would > > expect a tire's pressure to drop from 32 to 28 psi due to temperature only. [quoted text clipped - 5 lines] > don't. Add permiation of 1-2 psi/mo. to dropping ambient temps, and you can > easily end up with a 10+ psi. drop in just a few weeks. Oh yeah. That makes sense. Tires, being black, will suck up heat from the sun like crazy. The sunny one could easily be 50 F higher than the shady one. SignatureJohn ThunderSnake #59 If you Reply, be sure and remove the " (DELETE_THIS) " from the email address. >> > For a temperature drop from 85 F (summer day) to 35 F (winter day), I > would [quoted text clipped - 14 lines] > sun like crazy. The sunny one could easily be 50 F higher than the shady > one. Not to mention that the weather is never a slow change here in PA. One day can be 40, the night 30, and the next day 75. The weather here gets to be a big yo-yo this time of year.... JS I check tire pressures weekly. I noticed that my tire pressure in my tires dropped from 35psi to 23psi when it got REAL chilly over here in Arkansas. Got 'em back up to 30psi.. was supposed to get warm the next day. It did. -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > Everyone knows maintaining correct tire pressure is vital for optimum > fuel economy, tire longevity and vehicle performance. But did [quoted text clipped - 7 lines] > '93 Cobra > '83 LTD > Everyone knows maintaining correct tire pressure is vital for optimum > fuel economy, tire longevity and vehicle performance. But did [quoted text clipped - 7 lines] > '93 Cobra > '83 LTD So you're saying it's time to change out of our summer air? Steve 72 Skylark Custom455 > So you're saying it's time to change out of our summer air? I heard that Pep Boys is having a special on their 4 tire flush and fill. They'll even put in aftermarket Helium instead of OEM air, since we all know that a car will go faster if it's lighter. SignatureScott W. '66 Mustang HCS 289 '68 Ranchero 500 302 '69 Mustang Sportsroof 351W '97 Cougar 30th Anniv SE 4.6L ThunderSnake #57 http://home.comcast.net/~scott.williams.613/ LOL that's great... -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > > So you're saying it's time to change out of our summer air? > [quoted text clipped - 9 lines] > ThunderSnake #57 > http://home.comcast.net/~scott.williams.613/ > > So you're saying it's time to change out of our summer air? > > I heard that Pep Boys is having a special on their 4 tire flush and fill. > They'll even put in aftermarket Helium instead of OEM air, since we all know > that a car will go faster if it's lighter. Costco is using Nitrogen. Steve 72 Skylark Custom455 >> So you're saying it's time to change out of our summer air? > > I heard that Pep Boys is having a special on their 4 tire flush and > fill. They'll even put in aftermarket Helium instead of OEM air, > since we all know that a car will go faster if it's lighter. But then you might lose traction. Joe Calypso Green '93 5.0 LX AOD hatch with a few goodies Black '03 Dakota 5.9 R/T CC >>They'll even put in aftermarket Helium instead of OEM air, >> since we all know that a car will go faster if it's lighter. > > But then you might lose traction. Nah, that's what the huge exhaust tip is for, jet propulsion. SignatureScott W. '66 Mustang HCS 289 '68 Ranchero 500 302 '69 Mustang Sportsroof 351W '97 Cougar 30th Anniv SE 4.6L ThunderSnake #57 http://home.comcast.net/~scott.williams.613/ >>So you're saying it's time to change out of our summer air? > > I heard that Pep Boys is having a special on their 4 tire flush and fill. > They'll even put in aftermarket Helium instead of OEM air, since we all know > that a car will go faster if it's lighter. <deadpan> Good deal, especially if you grab the coupon for only $79.95 from Sunday's newspaper. Signature/ Garth - '83 GL V6stang Hatch <Former MW #7> \ | My V6stang: http://www.v6stang.com/v6stang | | RAMFM Merchandise: http://www.cafeshops.com/ramfm | \ Mail pgp@v6stang.com for secure reply information / Pfft... Helium... I only use AmsAir synthetic air!.... shoot me an email and I'll hook you up with a can :) > >>So you're saying it's time to change out of our summer air? > > [quoted text clipped - 12 lines] > | RAMFM Merchandise: http://www.cafeshops.com/ramfm | > \ Mail pgp@v6stang.com for secure reply information / That's good stuff! Are you an authorized dealer, or is this grey market stuff? Steve 72 Skylark Custom455 > Pfft... Helium... > [quoted text clipped - 19 lines] > > | RAMFM Merchandise: http://www.cafeshops.com/ramfm | > > \ Mail pgp@v6stang.com for secure reply information / I hear the Drug Cartels are getting into this market.... as a secondary use for cocoa leaves.... Turned to a powder it's pumped into the tire under pressure and you get a much lighter ride.... or was that a much higher ride??????? ; ) >Pfft... Helium... > [quoted text clipped - 19 lines] >> | RAMFM Merchandise: http://www.cafeshops.com/ramfm | >> \ Mail pgp@v6stang.com for secure reply information / Entering into the unknown, V'ger seeks information used to maintain his Vintage Burgundy 1965 Ford Mustang 2+2 w/289 ci 4v oem A Code V8, C4 Trans, 16x8" Vintage 40 wheels, with BF Goodrich gForce T/A 225/50ZR16 tires, American Racing "Mustang" Centercaps, and a whole lot of other stuff; ) Air shocks have become obsolete. Steve 72 Skylark Custom455 > I hear the Drug Cartels are getting into this market.... as a > secondary use for cocoa leaves.... Turned to a powder it's pumped into [quoted text clipped - 31 lines] > T/A 225/50ZR16 tires, American Racing "Mustang" > Centercaps, and a whole lot of other stuff; ) but in the haste to make sure that tire pressure is right on the mark.... make darn sure the gauge is a good one. I had a low tire on a trip and didn't have my personal gauge with me. Stopped at a gas station and filled it up..... to twice the max.... It didn't feel right on the road, so I stopped a few miles laterand checked it again. Then went in and bought another good gauge. Scary...... >Everyone knows maintaining correct tire pressure is vital for optimum >fuel economy, tire longevity and vehicle performance. But did [quoted text clipped - 7 lines] >'93 Cobra >'83 LTD Entering into the unknown, V'ger seeks information used to maintain his Vintage Burgundy 1965 Ford Mustang 2+2 w/289 ci 4v oem A Code V8, C4 Trans, 16x8" Vintage 40 wheels, with BF Goodrich gForce T/A 225/50ZR16 tires, American Racing "Mustang" Centercaps, and a whole lot of other stuff; ) When I was a tire buster in the early 80's every time the temps plunged below freezing you used to get a spate of tire repairs. Most were on alloy wheels that people used in the winter. The lower pressure in the cold would lessen the pressure of the bead seal and allow a slow leak to develop at the bead due to corrosion of the alloy ( from salt usually) Thus would begin the vicious cycle of the air leaking pressure dropping MORE air leaking MORE pressure drop.... next morning...flat... If you have the wherewithal to pump your tire up chances are it would hold fine for a day or two allowing you to get to work and not have to get dirty changing it out. I worked piece work so we hated those jobs as they were the most labour intensive for the same amount as a simple tire plug. Mark ( for maintaining balancing) and dismount the tire. Spin the wheel on the balancer and sand the bead. Remount the tire and slop on the sealant. Fixed... and of course install it on the car as it usually came in the trunk! StuK > but in the haste to make sure that tire pressure is right on the > mark.... make darn sure the gauge is a good one. I had a low tire on a [quoted text clipped - 21 lines] > T/A 225/50ZR16 tires, American Racing "Mustang" > Centercaps, and a whole lot of other stuff; ) |
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