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Old 01-13-2016, 05:29 PM   #15
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96 bucks on Amazon. Works great.

Have the Sears labeled version of the above.

Getting ready to go from S. Florida up to N. Florida where the lows will be around 40.

Added 5 pounds all around to compensate the the temperature difference.

Easy peasy, light and compact.
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Old 01-14-2016, 01:53 AM   #16
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I would highly recommend one of the Viar Compressors. They are very compact and work great. Easily airs up my 120 pound tires.

I would recommend the 450p RV model for the 100% duty cycle.
I went with the 400p RV since it's flow rate was higher at 2.30 CFM vs 1.80CFM on the 450p RV. My theory was unless I was filling an empty tire the 400p RV would top off my tires faster and I would not exceed the time period for running the pump between rest times AND it was cheaper.. I added 10 PSI to all 6 tires and did not need a rest period for the pump. Either one is an excellent choice.
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Old 01-14-2016, 12:29 PM   #17
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I went with the 400p RV since it's flow rate was higher at 2.30 CFM vs 1.80CFM on the 450p RV. My theory was unless I was filling an empty tire the 400p RV would top off my tires faster and I would not exceed the time period for running the pump between rest times AND it was cheaper.. I added 10 PSI to all 6 tires and did not need a rest period for the pump. Either one is an excellent choice.
I did the exact same, for the exact same logic.
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Old 01-14-2016, 12:45 PM   #18
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Have the Sears labeled version of the above.

Getting ready to go from S. Florida up to N. Florida where the lows will be around 40.

Added 5 pounds all around to compensate the the temperature difference.

Easy peasy, light and compact.
So when I go from here (100+ degrees in the summer) to Montana (40 ish) I should change the air pressure accordingly??
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Old 01-14-2016, 01:47 PM   #19
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You will see your air pressure drop for sure, and so I would be checking your pressure and topping off accordingly.
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Old 01-14-2016, 02:35 PM   #20
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You will see your air pressure drop for sure, and so I would be checking your pressure and topping off accordingly.
Should I let the tires cool before checking and adding air?
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Old 01-14-2016, 02:40 PM   #21
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Yes. The only way a tire pressure reading is reliable and correct is if the tire is at the same temperature as the air around you. Adjust your pressure while the tires are hot and you will not get the correct pressure. That is one good reason to carry a compressor, so you can add air before you start out in the morning, when the tires are cold.
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Old 01-14-2016, 03:08 PM   #22
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I run TPMS sensors on all of my Rv and toad tires, and I have minimum and maximum psi alarms that help me to know if I need to pull over and fill.

I suspect that if you start your trip in warm weather with tires full, as you make headway on the road the temps will increase as usual as they build heat from driving. When you park for the night, temps will drop at rest, and more so depending on how cold it is where you have parked.

The next morning is a good time to check pressure (before you start driving again). You should fill to your cold-driving temps again. And then monitor as you go.

If you don't have a TPMS, I recommend that you check in the AM, and at every fuel/rest/food stop.
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Old 01-14-2016, 06:38 PM   #23
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It's approximately 1 psi for every 10 degrees temp change.
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Old 01-15-2016, 08:39 AM   #24
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Old 01-17-2016, 09:23 AM   #25
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I would highly recommend one of the Viar Compressors. They are very compact and work great. Easily airs up my 120 pound tires.

I would recommend the 450p RV model for the 100% duty cycle.
X2! Love mine and use it all the time. In spite of its power it is much quieter than the pancake I have at home.
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Old 01-17-2016, 10:09 AM   #26
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If you have a D/P you already have a compressor on board !!! just tap into a line, the engine compressor will pump up to 130-150psi
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Old 01-17-2016, 12:48 PM   #27
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Most gas stations if they have 75 PSI in the lines I'd be surprised, Truck Stops may push twice that or more.

I use a Sears (Crafstman) portable pancake style 4 Gallon tanked compressor with a 150 PSI rating.. The model I have is no longer made but they have a replacement that is actually a bit nicer Fits in my basement storage when not in use. here is the current offer, Only 170 bucks (rounded).
Sears.com

Oh, one more thing.. The Compressor I have is 10 years old.. Still going strong.. i've had some "El-Cheapo" compressors in my time, None made it a year.
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