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| Metric Conversion https://www.slantsix.org/forum/viewtopic.php?t=22509 |
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| Author: | Slant Cecil [ Sat Mar 31, 2007 6:47 pm ] |
| Post subject: | Metric Conversion |
I need to know what psi to inflate my tires to, they only have 16psi in them now and they look underinflated. Sidewall rating states 1650kg @ 200kpa. I found a conversion calculator and came up with 3638lb @ 29psi. Is this right? Just what is a pascal? |
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| Author: | sandy in BC [ Sat Mar 31, 2007 7:32 pm ] |
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You guys get more Canadian all the time. Your conversion seems correct. |
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| Author: | SlantSixDan [ Sat Mar 31, 2007 7:47 pm ] |
| Post subject: | |
1 kilopascal = 1000 pascals = 0.145 PSI Therefore, 200 kPa = 29 psi (just what you came up with). But, take a look elsewhere on the tire and you should see a maximum inflation in PSI. 29 is low for an actual running pressure and is probably just the load-rating pressure. You will probably find a max pressure of 35, 37, or 40 psi or that neighbourhood. If you find absolutely nothing, 32 is virtually always a good, safe number to use. Remember, higher pressure = lower rolling resistance = better MPG and performance, but don't overdo it because overinflation = rapid tire wear and skittish handling. And don't let Sandy tease you. We fill our tires with PSI in Canada, too! |
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| Author: | emsvitil [ Sat Mar 31, 2007 7:50 pm ] |
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There's 2 parts to tire inflation....... 1. How much load each tire can take at a given inflation pressure. That's your 3638lbs at 29psi. The load the tire can take is roughly proportional to tire pressure (i.e. it would be about 1819lbs at 14.5psi) 2. What tire pressure you should have for your individual car. Too high or too low causes wear problems. Too low, bad handling, blowouts. Too high rough ride. If you have one of those infrared thermometers, the best way to get the right pressure is to see if the temperature the same across the tread. Higher in the middle, it's overinflated. Higher at the edges its underinflated. Inside or outside higher than the other side would indicate alignment problems. Or just put 30psi in all 4 tires like I do......... |
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| Author: | Ron Parker [ Sat Mar 31, 2007 8:07 pm ] |
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Holy hell Slant Cecil cant remember how to air up tires. This is the U.S.A. son it should say psi somewhere on the tire if it doint trow it away. Forget all of that other garbage about venus or chapter 90. 30 psi Thanks Your friend Ron Parker  Bagels Juiced Im Bamboozled |
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| Author: | Slant Cecil [ Sat Mar 31, 2007 8:36 pm ] |
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Thanks, I wanted to make sure the conversion was right. These aren't tires for my Valiant, tire size is 13.6x28. I bought a tractor last week. The only psi rating was the 'do not exceed 35psi to seat the bead'. I don't know why that was in psi and the max load rating was kpa. |
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| Author: | Bren67Cuda904 [ Sun Apr 01, 2007 4:57 am ] |
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Are you giving up the package hauling to become a farmer? 
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| Author: | Ron Parker [ Sun Apr 01, 2007 5:02 pm ] |
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Slant Cecil you did not say it was a tractor tire. As you know down here in Dixie some farmers put I think calcium carbonante and water in the tires for weight and it wont freeze in the winter. But do you know the best inflator gas one could use in a car tire or airplane tire and why.First correct answer gets a free T shirt audographed free by me and my Choclate Lab Snickers . Thanks Ron Parker Bagels Juiced Im Bamboozled |
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| Author: | Slant Cecil [ Sun Apr 01, 2007 5:13 pm ] |
| Post subject: | |
Nitrogen is the best, has a lower expansion rate than air. I'll get my shirt at the Valdosta race and wear it proudly! I may put water in the front tires to hold it down when I pick up the mower. It will wheelstand like Drake's Simca and push while turning like A Chevy Nascar with the mower raised. Water is cheaper than weights, bracket is $155, suitcase weights are $75 per 100lb. How much calcium carbonate do I use and where do you buy it? Is it for more weight or to keep it from freezing? I don't need much freeze protection. |
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| Author: | Dart270 [ Sun Apr 01, 2007 7:39 pm ] |
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1 pascal = 1 N/m^2 (one newton per meter squared) = unit of pressure in standard international (SI or metric) 1 Newton is the SI unit of force. Lou |
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| Author: | Slant Cecil [ Mon Apr 02, 2007 11:57 am ] |
| Post subject: | |
Thanks Lou, I wasn't sure what the definition of a Newton was, I thought it may have been a function of a specific unit of mass and gravity, so I looked it up and see I was close. "Newton: the SI unit of force, equal to the force that produces an acceleration of one meter per second per second on a mass of one kilogram." So gravity isn't used since it's not a constant, but a measurement of acceleration is. |
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