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Nitrogen in tyres

Discussion in 'General' started by Julie, Jul 8, 2005.

  1. Julie

    Julie moderator- for now anyway

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    Heya guys,

    Just had to buy some new rubber 2day, and we thought we'd give the nitrogen a go instead of just having them filled with the usual oxygen. Has anyone had experience with nitrogen in tyres and was it worth the extra few bucks or was it just a rip off?

    Cheers Julie :)
     
  2. michaelw

    michaelw Donating Member

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    They use it on the big trucks in the mine. But I very much have my doubts for a car going about normal driving.

    nitrogen = rice gas? ;)

    Mike
     
  3. brock/owna

    brock/owna Guest

    i have had tyres the same type size make brand pattern 1 set with nitro 1 set without and felt no difference in drive no longer tyre life or constant inflation i did not check the preassure difference while on a long drive to look for increases but over time niether stayed at the correct preassure over the 1 year period each for each set
     
  4. enhancedss

    enhancedss New Member

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    there is no advantage for a normal street car, when i used to race karts, i did some testing on the nitrogen and normal oxygen, and there was a difference, but a normal car will never ever get the amount of heat into the tyre for it to be a benefit, on the street. A normal street tyre is not designed to get hot, however a racing tyre is designed to heat up fast and then hold the heat in. The testing results were nitrogen heated up faster, and held temperature high, but never actually blistered the tyre, where normal oxygen filled did blister after a while.
     
  5. Daza

    Daza Member

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    Personally I wouldnt bother with nitrogen for a tyre fill. On the test rig at work we have tried nitrogen,argon,normaly dried compressed air and dry compressed air (dew point at -30c at 700kpa). Many years ago when trying to keep 17" low profile tyres on long enough to get a wheel to 5000 kms? at full load rating in one hit nitrogen gave another 200 kms before the tyres blew out, delaminated or the casing split. The extra distance may have been due to us starting to x ray the tyres before fitting them and sending back the duds (OEM tyres as well) None ever made the distance. Dry compressed air works pretty well and I believe all tyre fiters should use refrigerated dryers and 5 micron oil traps at the very least for tyre fills (Wet oily air is not good for rubber). Of course this will cost them money so they just sing the praises of nitrogen let BOC take care of the purity and let you pay for it.
    Cant help :ranting: sometimes
    Good luck with the new rubber
    Daza
    I assumed you meant air not oxygen for a tyre fill as Rubber+o2+heat=Solid fuel rocket motor :w00t:
     
    Last edited: Jul 9, 2005
  6. jetspin_vn

    jetspin_vn JetSpin Racing Team

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    Haha thats just become something I want to see!! But yea as we know air is only in fact 20% Oxygen.
     
  7. The1985divo

    The1985divo Active Member

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    Had nitro put in my tyres when they were replaced, this is about 2 months ago and hadly ne leakage at all, other than that all the same as oxygen
     
  8. Troy711

    Troy711 Retired Old Fart Staff Member

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    next time i need tires im gunna see if they will fill em with helium... i hear helium is excellent! you get better fuel consumption (as much as 5L/100Km better) because the wheels/tires are lighter and have less rolling resistance. you also get a power increase of 76.5% because of the same factors i just mentioned :)
     
  9. Julie

    Julie moderator- for now anyway

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    Hehe I spose if the helium does nothing, at least u can suck it outta ya tryes and make funny voices. :whistling
     
  10. jetspin_vn

    jetspin_vn JetSpin Racing Team

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    Go for Hydrogen while your at it, make them go BANG!!
     
  11. Troy711

    Troy711 Retired Old Fart Staff Member

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    stuff it, ill just fill em full of petrol so when i do burnouts and burst the tires and make sparks off the rim ill have a huge fireball! siiiiiick!!!
     
  12. michaelw

    michaelw Donating Member

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    I so much hope you are joking. Why not just but a helium bottle in the back and then you could sell petrol from your tank as you get negative fuel consumption ;)
     
  13. Silver

    Silver New Member

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    Helium, wake up to yourselves people!

    Silver
     
  14. Torana

    Torana Young Einstein

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    *lmfao* Helium in tyres? I didn't know Commodores could fly *lmfao*. Apparently all nitrogen does is keep the tyres cooler...
     
  15. Fekason

    Fekason Fekason

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    Nitrogen is an inert gas.

    The basis for using nitrogen is that it is an inert gas. Oxygen is not.

    I spent years flying aircraft with notrogen in the tyres, and have been doing the same with my cars for a couple of years now.

    What I do notice is that I never have to add gas to the tyres, whereas on air I was having to do so fairly frequently.
     
  16. vkberlina

    vkberlina VK Madman

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    The main reasons for running nitrogen are as follows
    The rubber used for tubes & inner liners in tubeless tyres is not 100% impermeable, therefore some pressure loss can be expected over time. This is one reason why regular pressure checks are necessary. Due to its molecular structure, nitrogen bleeds through the inner liner or tube at a slower rate than regular compressed air.
    Tyres inflated with nitrogen will run cooler than those inflated with compressed air.
    Reducing a tyre's running temperature will increase its tread life. The amount of increased tread life will depend on the amount running temperatures are reduced by using nitrogen rather than compressed air for inflation.
    Although in most road going scenarios your tyres wont get hot enough to take advantage of this.
    3 applications I can think of where nitrogen will actually be useful, are planes (not going to go into this), racing and trucks where the extreme load to the tyre causing the excessive heat will also cause increases in pressure.
    In racing scenarios where 1 degree temperature change can have a huge effect to the tyres contact patch on the tarmac nitrogen is useful. In the case of tracks in you run a tyre too low or too high it will overheat and can catch fire , this is where nitrogen can kepp the tyre temps more stable.

    Personally I fill my tyres at home out of our compressed air system and check them every thousand or so km. When I used to run Go-karts we did fill the tyre with nitrogen to improve temperature stability.

    cheers
    Scott
     
  17. this nitrogen / air leaking thru tyres bit..is that similar to SCUBA divers getting the bends from the nitrogen molecules expanding in their blood???
     
  18. Fekason

    Fekason Fekason

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    A Physiology Lesson.

    Let's go into a bit more detail.

    When a gas is exposed to a liquid, some of the gas dissolves into that liquid. How much depends on the pressure of the gas.

    I'll talk aviation here, but the story is not dissimilar for diving.

    Thus at sea level, our bodies contain a certain amount of dissolved nitrogen. If we were to fly an unpressurized aircraft, as we climb the "partial pressure" of the nitrogen in the air reduces, and thus nitrogen comes out of solution in our moist tissues. The body can copy with certain amount of nitrogen coming out of solution, but if it becomes too much too quick then the resulting bubbles can become a problem. A most hazardous situation is an explosive decompression.

    These bubbles can cause aches in the joints, which is what most people associate with the bends. Of more danger is nitrogen bubbles in the blood, which can block the tiny blood vessels in the brain and cause similar effects to a stroke. I have had the "pleasure" of spending a night in a recompression chamber for this very reason.

    Now nitrogen is 79% of the air, but why doesn't the 21 % of oxygen cause a problem.

    Also, a solution to the problem in aviation is to breathe 100% oxygen to reduce the nitrogen levels in solution in the body. Why doesn't the higher levels of oxygen then cause the same problem.

    The reason for this is that oxygen is not inert, and is more readily reabsorbed in the tissue and blood, and tehn transported to the lungs to be removed from the body with no trouble. On the other hand, the nitrogen is much slower to dissolve again, so lingers on giving problems.

    This is effectively the reason that nitrogen in the tyres leaches out through the rubber so much slower than air containing oxygen.

    Obviously, I have simplied the description above, but if any one is interested in more detail, go to your nearest library and get a book of aviation physiology. Makes interesting reading.
     
  19. Troy711

    Troy711 Retired Old Fart Staff Member

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    twas a joke, calm down dude
     
  20. Patrio7

    Patrio7 3Y3 K4N 5P33K 1337.

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    i was just thinkign that, but save ti for a burn out comp, the tires give and then a spark sets it off. would make for an interesting photo
     

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