Nitrogen filled tires |
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Nitrogen filled tires |
smooth_eddy |
Mar 21 2005, 11:04 PM
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#1
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Senior Member Group: Members Posts: 535 Joined: 13-November 04 From: Seattle Member No.: 3,102 |
I had some tire work done at Costco last Saturday and they filled my tires with Nitrogen. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) They swear by it. Says it is way more stable than just regular old air. Anybody using nitrogen in their tires? Is there a noticable difference? Eddy
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mightyohm |
Mar 21 2005, 11:11 PM
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#2
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Advanced Member Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest |
Air is 78% nitrogen. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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Tom73 |
Mar 21 2005, 11:19 PM
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#3
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Member Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792 |
Sounds to me as if somebody at Costco is pulling on your leg............
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bondo |
Mar 21 2005, 11:22 PM
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#4
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
I have heard that the big benefit is no water. Which means no rust on steel wheels. I have also heard stories about tire shops that don't drain their compressors, and their first few customers in the morning get lots of water in their tires. Dunno if there's any truth to that. Costco claims improved gas mileage and safety.. they may be, but I doubt it's measurable.. unless you take the large amount of water worst case. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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smooth_eddy |
Mar 21 2005, 11:26 PM
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#5
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Senior Member Group: Members Posts: 535 Joined: 13-November 04 From: Seattle Member No.: 3,102 |
Costco claims the air we breath is 78% Nitrogen and 21% Oxygen. The 21% is what expands and contracts due to the moisture content and temperature changes. Also, the oxygen is what leaks out of our tires in 6 months. I was just wondering if they were just blowing smoke up my (IMG:http://www.914world.com/bbs2/html/emoticons/bootyshake.gif)
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McMark |
Mar 21 2005, 11:38 PM
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#6
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I believe there is a value to nitrogen. I don't think it's necessary for street cars, but it doesn't hurt.
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scotty914 |
Mar 21 2005, 11:38 PM
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#7
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suby torque rules Group: Members Posts: 1,525 Joined: 20-July 03 From: maryland, the land of 25 year Member No.: 924 |
well here is a thought... is it cheaper to have a company drop off n2 bottles than to purchase, wire, and maintain a compressor. when i played paintball n2 was just coming out and we could get 1800 psi n2 bottles for like 6 bucks, and thats was for a 200 cubic foot bottle. how many tires can you fill from a 200 cubic foot bottle. lets say about 50, so its about 12 cents a tire, not very expensive.
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North Bay 914 |
Mar 21 2005, 11:40 PM
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#8
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Senior Member Group: Members Posts: 509 Joined: 25-January 05 Member No.: 3,504 |
This is a standard practice in Europe done for saftey and its convienient to not always have to check the tire pressure because of big temp changes (Summer-Winter), and 100% required in Aviation (Aircraft Tires). The main reason for it is the stability of Nitro during temperature change, the pressure remains more constant. Remember that these tires see a temprature range that is so wide that use of a stable gas that is little affected by temp is a must. -50 to + 300 F caused by temps at 35000 ft, then after landing, and stopping something that weighs 500,000 pounds the brakes get a little warm. The heat shields on the wheels help, but allot of heat goes straight to the tires...
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McMark |
Mar 21 2005, 11:41 PM
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#9
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Some benefits:
Nitrogen permeates through the tire 3 to 4 times slower than oxygen - tires maintain pressure longer for better fuel economy, better tire life, and increased safety. Nitrogen reduces oxidation to tire rubber and rims caused by oxygen in standard compressed air. Nitrogen filled tires run about 20% cooler than tires filled with standard compressed air - tires last longer. |
MarkV |
Mar 22 2005, 12:30 AM
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#10
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Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
I bought tires at Costco a few months ago, they replaced the valve caps w/ green colored ones to indicate nitrogen.
Was wondering if those green dots painted on some Porsche wheels means they were filled w/ nitrogen from the factory. (IMG:http://www.914world.com/bbs2/html/emoticons/icon8.gif) |
bondo |
Mar 22 2005, 01:36 AM
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#11
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
So THAT'S what the green cap thing is about.. I'd been wondering.
I figure if oxygen leaks out so much easier, and I top off my tires every few months, they should end up nearly pure nitrogen (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) |
SpecialK |
Mar 22 2005, 01:59 AM
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#12
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aircraft surgeon Group: Benefactors Posts: 3,211 Joined: 15-March 04 From: Pacific, MO Member No.: 1,797 |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) Yep...McMark pretty well covered it. Another reason aircraft use "dry-nitrogen" is because at cruising altitudes it's friggin' cold (technically speaking), and if they used compressed air the moisture would condense and then freeze. A chunk of ice in your tire would throw off the balance of the tire upon landing..........not good! (URY914's probably thinking...... (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif) "If I used helium, my car would be even lighter!!") |
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morph |
Mar 22 2005, 02:22 AM
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#13
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quality parts builder Group: Members Posts: 1,828 Joined: 25-November 03 From: oregon coast Member No.: 1,389 Region Association: Pacific Northwest |
very intresting (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
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VegasRacer |
Mar 22 2005, 02:27 AM
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#14
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ELVIRA Group: Benefactors Posts: 8,624 Joined: 27-March 03 From: Between Scylla and Charybdis Member No.: 481 Region Association: None |
One of the guys I raced with in SCCA always brought a tank of Nitrogen to the track. My tire pressures would go up 6 - 8 lbs. in a 20 min. session with regular air. His would only go up 2 - 3 lbs with nitrogen in his tires.
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SpecialK |
Mar 22 2005, 02:31 AM
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#15
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aircraft surgeon Group: Benefactors Posts: 3,211 Joined: 15-March 04 From: Pacific, MO Member No.: 1,797 |
I think I read somewhere that they use dry-nitrogen in F1 cars just for that reason (lower expansion)
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machina |
Mar 22 2005, 02:52 AM
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#16
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Advanced Member Group: Benefactors Posts: 2,030 Joined: 21-June 03 From: Miami Beach, FL Member No.: 848 |
My buddy had a couple huge tanks of nitrogen in his race car trailer. Used it in his tires but mainly, it ran the built in jacks in the racecar.
The jacks needed like 250 psi to work, so an air compressor was out of the question. He also used it to power a giant impact wrench used for the centerlock nut on the wheels. That big nut needed like 350 lbs of torque. |
Don Wohlfarth |
Mar 22 2005, 07:26 AM
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#17
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Member Group: Members Posts: 104 Joined: 8-January 03 From: Fairfax, VA Member No.: 117 |
The magic word is dry nitrogen. Air has a lot of moisture in it. Using nitrogen in your tires you will not have the same rate of expansion you would with air. On track tires add 2-3# pounds to your starting cold pressures from when you were using air. Gives the tire a better footprint when starting out. When using air it is fairly normal to have a 7-9# difference between cold and hot pressures, with nitrogen it's usually 4-5#.
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Bleyseng |
Mar 22 2005, 08:17 AM
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#18
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I have had my Costco tires now for about 6 months filled with the Nitro. Wow what a difference!!! fantastic gas mileage! Incredible grip!
not..... (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
tat2dphreak |
Mar 22 2005, 08:55 AM
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#19
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
sux if you need a tire fixed and you are not near a costco... I don't think most tire places Keep nitrogen... (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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Bleyseng |
Mar 22 2005, 09:00 AM
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#20
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
yep, so now I carry a bottle of NOS in the front trunk to fill the tires!
The spare is hooked by the window washer tube to my super secret NOS spray setup for extra hp. No one can figure out why I beat them street racing! Geoff |
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