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Old 09-03-2016, 12:29 PM   #1
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Pump You Up

I am in need of a reliable, portable air compressor for TV and trailer tires. As I peruse the choices and read the user comments it would appear that most work great at footballs and bike tires. I really want a TV/RV tire inflator that is 120v and 12v DC. Are there any good ones out there? Oh, and I want one that will top off 50-65#s without sitting up all night listening to loud vibrations.
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Old 09-03-2016, 01:50 PM   #2
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Portable Air Compressor

We are very pleased with this VIAIR model 450P. It works great.

https://www.amazon.com/VIAIR-Automat.../dp/B000X9EGFS
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Old 09-03-2016, 02:09 PM   #3
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I got tired of buying (toy-like) 12v air compressors and bought a cheap HF 3 gal, 110v unit ($35 w/coupon), and installed a Peak 400 watt inverter ($25/w-rebate from PepBoys) in my truck. Now I can truly inflate a tire (including seat a bead on a rim) and also use other tools, such as a blow-gun, etc. since the 3-gal tank allows a big "shot" of air and not just a low-rate/low-press-over-time like little compressors do.
Additionally, I can run power drills, and other small 110v household items like fans, etc..
A larger inverter would do even better, and I"ve managed to get a 800 watt unit on sale for the same $25 from PepBoys.

NOw, the problem for YOU might be storage space. I have a "rambox" equipped Pickup truck, and the compressor, 25' hose, plus many accessorys all fit in there. I've used the HF compressor to bring trailer tires up to 80 psi and truck tires up to 40 psi in only a minute or so. (HEY! You gotta air up those chineese tires with a chinees air-compressor! Seriously...this IDENTICAL unit with a major US nametag sells for $159!)
(The HF compressor shuts itself off and stores 3 gals of air at 100 psi.)

http://www.harborfreight.com/1-3-hp-...sor-97080.html
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Old 09-03-2016, 02:35 PM   #4
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Originally Posted by Silverbee View Post
We are very pleased with this VIAIR model 450P. It works great.

https://www.amazon.com/VIAIR-Automat.../dp/B000X9EGFS
Does it run off of 110 V as well as 12 V? Thanks.
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Old 09-03-2016, 04:58 PM   #5
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ViAir only run off 12v, but they work great. You attach the leads to the battery of your truck. I love mine, the 88p, works great for my trailer tires, and my truck. My truck is a 1500, and the tires only need to be pumped up to 35 lbs. If I had a 2500 I might opt for the beefier Viair 450p, but the 88 works great for my truck and trailer. And, it's small size means easy storage.

Mike
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Old 09-03-2016, 05:17 PM   #6
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FYI here are some other threads on the issue:

http://www.airforums.com/forums/f438...or-150447.html
http://www.airforums.com/forums/f48/...rs-135158.html
http://www.airforums.com/forums/f438...ons-97182.html
http://www.airforums.com/forums/f42/...or-145196.html

Please let us now what you get and how it works out.

Thanks,

Peter
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Old 09-03-2016, 05:31 PM   #7
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Portable Air Compressor

Longboard6
As Caffeinated said it is 12V only. I have saved several campers who had tires with low air pressure as well as myself when we made a 5 week 6 thousand miles trip out to Wyoming. I also came to the rescue at my brother-in-law's daughter's wedding. He had a low tire and no time to go find air. I was parked beside him and had his car tire up to pressure in no time.

I did buy the extra extension hose to give me a little more length. It is quiet, easy to operate and comes with a great carry bag. I have a Ford F250.
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Old 09-03-2016, 05:56 PM   #8
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Originally Posted by Caffeinated View Post
ViAir only run off 12v, but they work great. You attach the leads to the battery of your truck. I love mine, the 88p, works great for my trailer tires, and my truck. My truck is a 1500, and the tires only need to be pumped up to 35 lbs. If I had a 2500 I might opt for the beefier Viair 450p, but the 88 works great for my truck and trailer. And, it's small size means easy storage.

Mike

I have the 450p and love it. Bob Cross taught me a neat trick - I spliced the leads that go to the alligator clips and on both ends (the side coming from the compressor and the side going to the clips) I soldered quick connects. I then wired a quick connect to a female 7-pin connector so I can plug the compressor in to my truck's 7-pin socket for power. Or, I can remove that connection and quick connect the alligator clips if needed. Very convenient! That Bob Cross is one smart dude! 😀
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Old 09-03-2016, 06:10 PM   #9
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Great idea by Bob Cross! Does the 7-pin connection at the hitch carry enough juice for the compressors? The 88p and 450p each draw 20 amps at 12v DC, according to the Amazon links. Not sure what a typical tow vehicle supplies for the 12v feed to the trailer's batteries.

Thanks,

Peter
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Old 09-03-2016, 06:43 PM   #10
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Great idea by Bob Cross! Does the 7-pin connection at the hitch carry enough juice for the compressors? The 88p and 450p each draw 20 amps at 12v DC, according to the Amazon links. Not sure what a typical tow vehicle supplies for the 12v feed to the trailer's batteries.

Thanks,

Peter

I've been using it for several years that way. No problems here. And I have an inline fuse just in case...
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Old 09-03-2016, 07:33 PM   #11
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Portable Jump Start

Quote:
Originally Posted by SteveSueMac View Post
I have the 450p and love it. Bob Cross taught me a neat trick - I spliced the leads that go to the alligator clips and on both ends (the side coming from the compressor and the side going to the clips) I soldered quick connects. I then wired a quick connect to a female 7-pin connector so I can plug the compressor in to my truck's 7-pin socket for power. Or, I can remove that connection and quick connect the alligator clips if needed. Very convenient! That Bob Cross is one smart dude! 😀
That is a good solution. I have used my 450 connected to my trailer house battery, but found the best thing for a quick top up is connecting to the alligator clips of my small lithium battery jump start pack.
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Old 09-06-2016, 05:54 PM   #12
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Wondering why one would need to carry an air compressor around. Modern tires of good quality should only loose about 1.5% a month. Also tire pressure will only change by about 2% for each change in Ambient temperature of 10F. If you inflate your tires to the pressure on the tire sidewall to lower the "Interply Shear" you should be at 10 to 15% more inflation than is required to support the actual measure load on the heaviest loaded tire.
So unless you find yourself driving from very hot to very cold the pressure should be good enough to carry you for a couple of days at a time. Then you can always air up ar a truck stop when you gas up.

If you know you need to add say 5 psi based on the cold tire pressure reading from your TPMS in the morning you can simply measure the hot pressure at the gas stop and add 5 psi to the measured hot pressure and you should find that you now have the correct inflation the next morning.
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Old 09-06-2016, 06:05 PM   #13
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With all the anecdotal evidence of GYMs failing, and the potential for extensive trailer damage, my compressor is cheap insurance to make sure I don't have a problem I really don't want.

Mike
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Old 09-06-2016, 06:22 PM   #14
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I use a 4 in 1 1000 peak amp jump start tool. Charge it up once a month. It will do a jump start, has an airc ompressor, work light, inverter plug, and USB outlet to charge cell phones, etc. It will do the job of pumping my tires on the trailer up to 70 psi and the truck to 80 psi. It will keep them all topped off, but would have to be recharged to pump them all up from scratch. It works well for me, and I like the security of having jump start ability.

https://www.google.com/search?q=cate...F-YkGtj9bhM%3A
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