Nitrogen Tire Top Off Kit

[mailman-ret]

I am in search of a nitrogen topping off kit that could be carried in one's vehicle that could successfully store the unused portion until needed without leaking. We just purchased our DENALI and when checking to find that nitrogen filling stations are few and far between. On several of the web sites, they mention that the CO2 kits would accomplish keeping water out, but they are designed to inflate bicycle tires.

[MEXICOWANDERER]

[jyrostng]

My background is ET bracket drag racing, On rear slicks I know the difference in checking before and after each burnout at every run and only once after the first burnout of the day. I don't care at all what you think of using N. I know the difference and have the checks to prove it. The difference in 10 lbs grip on a 140 deg track and 13 lbs. is win or lose. My tire gauges. We race at 10 lbs in the slicks

[red31]

checked my truck tire's pressure twice during this thread, once before each 400 mile RT.

[greenrvgreen]

I believe my credentials are as good as anyone's here when it come to laughing at the N-word (Nitrogen). That said, it seems to me that what some people are calling the OP's "obliviousness" is actually just persistent good manners.

I believe the OP got his question answered in among the catcalls, so it all worked out. But at the same time it looks like the rest of us got taught a good lesson here about trying to decide what other peole ought to want.

That said, nobody laughs harder than me at the idea of paying to replace 78% Nitrogen with putative 92% Nitrogen that may in fact be 78% Nitrogen with additional moisture in it. Camp on!

[Sam_Spade]

4x4van wrote:
The amount of moisture in a tire filled with air (80% nitrogen) vs 100% nitrogen is negligible, both from a pressure standpoint as well as a rust/corrosion standpoint.

NOT a valid conclusion to draw because......you don't know where/how the tires were filled with air.

I've seen many air compressors that spit water out the end of the hose like it was connected to a water faucet.

[jfkmk]

MEXICOWANDERER wrote:
Die Thread DIE!

:B
Unfortunately, it will only get resurrected like the latest ST/LT thread.

[Dtank]

BTW CO2 is the worst thing to put in tires(in case anyone was considering it). As anyone who rides road bicycles, when you fix a flat and fill with a CO2 canister, tire is flat in the morning. CO2 leaks out in nothing flat.

*******************************************

Disagree with the above!

BEST thing since sliced bread -
but maybe not on the bicycle forums - which this isn't..:R

Actually off-road folks have been using C02 for years - DIY a system or retail set-up from suppliers such as "Powertank" (they sell Nitrogen set-ups also).
Air down for off road - air up on return to highway.

Great for topping off a low RV tire - re-fill at any home brew supplier, welding supply, etc.

Power Tank - (Note the RV uses)

Whatever rings your chimes - or rings your bike bell/s..:R



.

[MEXICOWANDERER]

Die Thread DIE!

[4x4van]

The amount of moisture in a tire filled with air (80% nitrogen) vs 100% nitrogen is negligible, both from a pressure standpoint as well as a rust/corrosion standpoint.

[jyrostng]

Good, YOU have dry air.

[babock]

jyrostng wrote:
Review the expansion rate of H2O in air. The expansion rate of water 3000:1. Air is compressed, air contains humidity, it is also compressed as well as the heat in the air. When that goes in your tire wet...

LOL...I don't put water in my tires. My compressor has 30 feet of line where it then reaches a drier. I spray paint cars with this setup so if I was actually getting liquid water with my air, I would have definite issues.

If the water exists as water vapor...guess what? That also obeys ideal gas laws and expands and contracts the same as nitrogen.

BTW, with the temp range that trailer tires experience, all of this is negligible anyway.


BTW CO2 is the worst thing to put in tires(in case anyone was considering it). As anyone who rides road bicycles, when you fix a flat and fill with a CO2 canister, tire is flat in the morning. CO2 leaks out in nothing flat.

[Sam_Spade]

babock wrote:

All gas be it nitrogen, oxygen, CO2 all expand and contract equally.
Review your high school chemistry.

Just when I thought this thread was about to die a natural death.


And what does YOUR high school chemistry say about water vapor ??

The consensus is that it's mostly the water vapor that expands and contracts more......so the DRY property of extracted and compressed nitrogen is the critical factor.

Dry air works just as good.....IF it is dried to the same degree.

[jadatis]

The influence of water is not that dramatical .
Once got hold of a spreadsheet in wich maximum partial pressure ( Pp) of water as gas .
At 65 degr F this Pp is 0.3 psi .
AT 113 degr /Pp 1.4 psi wich is average warm inside tire temp when driving about 50/55m/h.
AT 140 degr / Pp H2O 2.9 psi.this is to my conclusions what inside tire may maximally get only by driving when outside temp is 65 degr F.
AT 212 degr , Pp H2O 14.7 psi , wich is boiling point of water at normal outside pressure of 14.7 psi/1013mb.
This it can highly incientialy get in the tire, when for instance using the brakes to often when descending the mountains.
Then dry air would rise about to 1.4 times the pressure filled at freezingpoint of water, would mean for 100psi filled> 140psi and if enaugh liquid water in tire, it would rise to 140psi+ 14.7psi=154.7 psi.
In that situation it is an advantage, because then lesser deflection so lesser heatproduction of the rubber of tire by driving.
The cooling down of rubber then is also worse, because of the smaller temperature differences between rubber and inside air ( or whatever gas-compound).

So in normal situations, the extra rising of tirepressure would only be maximally 2.5 psi.
For a normal car tire with 35 psi filled this can have an effect on riding quality wich you might notice , but for a truckkind of tire like TS has, 2.5 psi is peanuts.

But OK , I also am going off topic here, like most of the 9 pages of reactions.

Lets get back on topic, and that is a Top off kit to use instead of a compressor. And so my question in former post still stands.
That one that had a CO2 fill up kitt, for filling when returning to road from offroad , what does it cost, and how is it made.
Then if we know that , TS can chance the CO2 cilinder by N2 and he has what he wants.
N2 is also a cheap gas.

EDIT: searched back this topic , but could not find the CO2 post, so must have been in another topic on another forum.

[MEXICOWANDERER]

Compressor for tires. Pump to system working capacity. Bulk tank cools to ambient temperature. Water is precipitated. Which is routinely drained daily. Output manifold has a cartridge water filter. Sufficiently dry to make the subject a thoroughly moot point.

Effects of O3 and UV on tires light years more important.

[jyrostng]

Review the expansion rate of H2O in air. The expansion rate of water 3000:1. Air is compressed, air contains humidity, it is also compressed as well as the heat in the air. When that goes in your tire wet, it dramatically affects the pressure at different temperatures. The benefit of Nitrogen is, it contains no moisture. The moisture in air causes the pressure change, If you could get air with no moisture in it, there would be no difference. Co2 is a liquid in a cylinder, it goes a lot farther in filling tires. co2's expansion rate from liquid is 532:1. 430cf of gas in a 50lb co2 bottle. 20cf in a n2 bottle the same size.