tire pressure with reg tires ....not run flat

[david12601]

I just picked up a set of factory rims an put on some dunlop sp tt max tires ......what tire pressure is right for regular tires??

 

[BoughtTheXLR]

I keep my Bridgestones at the mfr-sticker 30 psi.

 

[Phrede]

I just picked up a set of factory rims an put on some dunlop sp tt max tires ......what tire pressure is right for regular tires??

My experience is the door placard is never right and pressures need to be tweeked for best performance. Then you change to non- runflats...... I find that 34psi all around works well for me on my 255/40-19 Bridgestone S04s. I suggest set a pressure and go for a ride. After things heat up (watch the tire pressures on the display) put it thru some paces to check for under or oversteer.

 

[david12601]

I have them set at 33 now and will try it out after work...I was just wondering what people are are using.....I have a compressor and a couple of plug kits to keep in the car...it is not a daily driver it shares a bay in the garage with a 95 camaro........still learning about this xlr amazing machine and an amazing forum.....going to try and find a dealer within 50 miles that can work on it if there is something I cannot fix......going to have it aligned and have it checked to see if all the recalls have been taken care of.....the lady I bought it from is 77 years old and does'nt remember

 

[WB6BBZ]

My experience is the door placard is never right and pressures need to be tweeked for best performance. Then you change to non- runflats...... I find that 34psi all around works well for me on my 255/40-19 Bridgestone S04s. I suggest set a pressure and go for a ride. After things heat up (watch the tire pressures on the display) put it thru some paces to check for under or oversteer.

WHAT PHREDE, YOU'RE NOT USING NITROGEN IN YOUR TIRES?

 

[Phrede]

WHAT PHREDE, YOU'RE NOT USING NITROGEN IN YOUR TIRES?

Nope. I have lots of air available to stuff into my tires. While I understand the concept of using pure nitrogen, I'm not convinced the benefits outweigh the hassle and expense of having a N2 generator to remove the remaining 12% of non-nitrogen parts of the air. I'll just monitor my pressure. After all, it only takes a push of a button on our XLRs.

Besides, those green valve caps clash with my red car.

 

[Stella]

Would someone be able to inform me of the benefit of running nitrogen in your tires. I've always thought it was a marketing thing for the tire shops to be able to charge for air. What does the cust. Do when they need just acouple psi from season changes or leaking from the aluminum rims. I top off and check my tires twice a year. It real easy to kick on the compressor and top them off. I don't see any benefits of nitrogen except for the tire shops cash register.

 

[WB6BBZ]

Nope. I have lots of air available to stuff into my tires. While I understand the concept of using pure nitrogen, I'm not convinced the benefits outweigh the hassle and expense of having a N2 generator to remove the remaining 12% of non-nitrogen parts of the air. I'll just monitor my pressure. After all, it only takes a push of a button on our XLRs.

Besides, those green valve caps clash with my red car.

ROL

Hey, I just thought of something, GM never painted an XLR GREEN did they?

 

[standby-V]

Kelly Green

ROL

Hey, I just thought of something, GM never painted an XLR GREEN did they?

I did, in Kelly Green in Photoshop, boy was it ugly. I tried changing the font to Kelly green & bolded it but I can't seem to change the color of text..............any ideas?????

 

[WB6BBZ]

Would someone be able to inform me of the benefit of running nitrogen in your tires. I've always thought it was a marketing thing for the tire shops to be able to charge for air. What does the cust. Do when they need just acouple psi from season changes or leaking from the aluminum rims. I top off and check my tires twice a year. It real easy to kick on the compressor and top them off. I don't see any benefits of nitrogen except for the tire shops cash register.

Nitrogen does not expand or contract with temperature changes or leak through rubber tires or aluninum rims because it is a much larger molecule than compressed air, which is a mixture of Nitrogen, Oxygen, Hydrogen, Carbon Dioxide, Argon, Neon, Helium and whatever else that's in the 'AIR' that's being sucked into your compressor and not being filtered out.

As for cost, most tire dealers around my area will put nitrogen in your tires instead of 'air' at no additional charge if you buy the new tires from them.

As for the Green valve caps, just replace them with whatever color you like, who cares! If you have to put 'Air' in a tire, it's a natural mix anyway. If you take your car in for service, just put the Green caps back on your tires so the 'Techs' know your tires are charged with Nitrogen.

My daughter had purchased two new tires for my 04 Chevy Impala, when I loaned it to her, from the local Costco.
She requested that they be filled with nitrogen and Costco not only filled the new tires but also evacuated the older tires and filled them with nitrogen.

The only problem I had with Costco was they put the new Michelins on the rear and the OEM Goodyears on the front and a week later, she ran into the back of a Ford Escape and did over $3,500.00 worth of damage to my otherwise flawless Superior Blue 2004 Chevy Impala LS with just over 30K miles on it.

I ask her why she put Michelins instead of Goodyears on the car and she said,"I know you prefer them over any other brand and they were on sale which made them less than the cost of the Goodyears."

If you want to see the same color and body style, except for the rear spoiler that I have, watch Blue Bloods on TV.

 

[Phrede]

Nitrogen does not expand or contract with temperature changes or leak through rubber tires or aluninum rims because it is a much larger molecule than compressed air, which is a mixture of Nitrogen, Oxygen, Hydrogen, Carbon Dioxide, Argon, Neon, Helium and whatever else that's in the 'AIR' that's being sucked into your compressor and not being filtered out.

As for cost, most tire dealers around my area will put nitrogen in your tires instead of 'air' at no additional charge if you buy the new tires from them.

As for the Green valve caps, just replace them with whatever color you like, who cares! If you have to put 'Air' in a tire, it's a natural mix anyway. If you take your car in for service, just put the Green caps back on your tires so the 'Techs' know your tires are charged with Nitrogen.

My daughter had purchased two new tires for my 04 Chevy Impala, when I loaned it to her, from the local Costco.
She requested that they be filled with nitrogen and Costco not only filled the new tires but also evacuated the older tires and filled them with nitrogen.

The only problem I had with Costco was they put the new Michelins on the rear and the OEM Goodyears on the front and a week later, she ran into the back of a Ford Escape and did over $3,500.00 worth of damage to my otherwise flawless Superior Blue 2004 Chevy Impala LS with just over 30K miles on it.

I ask her why she put Michelins instead of Goodyears on the car and she said,"I know you prefer them over any other brand and they were on sale which made them less than the cost of the Goodyears."

If you want to see the same color and body style, except for the rear spoiler that I have, watch Blue Bloods on TV.

I disagree with your "nitrogen does not expand" comment. Nitrogen does expand when heated. Very few substances have a coefficient of expansion of zero, and nitrogen is not one of them. The difference of thermal expansion at the volume and temperature ranges seen by your tires is virtually undetectable. Especially since air is about 78% nitrogen to begin with.

I'm also not going to a tire dealer to correct the inflation of my tires. What a waste of fuel that is! My experience is that most tire dealer employees have a difficult time following instructions, or for some other reason, to get the right pressure anyway. I'll just do it myself so I know it is done right, thank you.

Do you really think someone evacuated all of the air out of a tire to fill it with N2? This would mean that the tire was completely collapsed due to a great vacuum. I don't think I would want my tires treated this way.

POWERTANK - CO2 Air Systems

The percentage of some of the other gases you mention in normal air is insignificant when inflating your tires. I.e. air contains .000524% He! Meaning that a 2000 square foot house has about 1/2 of one gallon of Helium in it.

Atmosphere of Earth - Wikipedia, the free encyclopedia

 

[standby-V]

I disagree with your "nitrogen does not expand" comment. Nitrogen does expand when heated. Very few substances have a coefficient of expansion of zero, and nitrogen is not one of them. The difference of thermal expansion at the volume and temperature ranges seen by your tires is virtually undetectable. Especially since air is about 78% nitrogen to begin with.

I'm also not going to a tire dealer to correct the inflation of my tires. What a waste of fuel that is! My experience is that most tire dealer employees have a difficult time following instructions, or for some other reason, to get the right pressure anyway. I'll just do it myself so I know it is done right, thank you.

Do you really think someone evacuated all of the air out of a tire to fill it with N2? This would mean that the tire was completely collapsed due to a great vacuum. I don't think I would want my tires treated this way.

POWERTANK - CO2 Air Systems

The percentage of some of the other gases you mention in normal air is insignificant when inflating your tires. I.e. air contains .000524% He! Meaning that a 2000 square foot house has about 1/2 of one gallon of Helium in it.

Atmosphere of Earth - Wikipedia, the free encyclopedia

I also disagree, I didn't see any difference in loss of air or nitrogen in my trials, so the nitrogen either escaped through or around the dedicated valve stem and TPM on each of my rims or from around the bead. Who really knows what's going on inside that tire? I also leave that job for me to take care of and make sure I tell anyone who is working on my car to leave the damn tire pressure alone, they mean well but should ask, just like the waitress or waiter that comes by and fills you coffee without asking and screws the sugar and cream combo all up. OK, so I can't tell dish water from coffee, but I do enjoy my one or two cups of coffee a month.

 

[b_pappy]

In response to the original question, I run my tires at 32F, 34R. Your opinion may vary.
And as much as I hate wading into Nitrogen discussion, Nitrogen is more stable at temp, and drier than compressed air. That's the reason it is used in aircraft and most race car tires. That said, I run air in my tires.
Bruce

 

[Phrede]

In response to the original question, I run my tires at 32F, 34R. Your opinion may vary.
And as much as I hate wading into Nitrogen discussion, Nitrogen is more stable at temp, and drier than compressed air. That's the reason it is used in aircraft and most race car tires. That said, I run air in my tires.
Bruce

Depending on the compressor setup Nitrogen MAY be drier, not absolutely. The application of aircraft tires is not a fair comparison. Much more volume, much higher speeds, much wider ambient temperature changes, much wider atmospheric pressure changes. Most aircraft are at a service facility when the tires stop rolling. Justifying the cost of a nitrogen generator.

Nascar also has higher speeds and are at a service facility when the tire stops rolling.

I tried N2 inflation and simply don't think it is worth the hassle for performance street use, especially when the ambient never goes below freezing.

 

[Phrede]

What I think is a good article on the subject with accurate information.
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=191

 

[david12601]

put 150 miles on the tires and readjusted air pressure to 32front 34 rear good combo for my car ......alignment checked performed and all is good to go ....thanks to everyone

 

[b_pappy]

Depending on the compressor setup Nitrogen MAY be drier, not absolutely. The application of aircraft tires is not a fair comparison. Much more volume, much higher speeds, much wider ambient temperature changes, much wider atmospheric pressure changes. Most aircraft are at a service facility when the tires stop rolling. Justifying the cost of a nitrogen generator.

Nascar also has higher speeds and are at a service facility when the tire stops rolling.

I tried N2 inflation and simply don't think it is worth the hassle for performance street use, especially when the ambient never goes below freezing.

I didn't say it was worth it, just tried to point out there is valid science behind the idea.

 

[Crimson Pearl]

I run Nitrogen in the tires on both my Tahoe and XLR, which both have tire pressure monitoring systems. The nitrogen fill does seem to be more stable than air. I run the factory installed tires on air until it was tire replacement time. I then replaced the worn set with the same exact tire, but filled with Nitrogen.

I have also found that I do not have to add nitrogen between tire rotations. This is a nice benefit to me as well.

My local tire dealer/tire service facility charges a very minimal fee for nitrogen fill with purchase of new tires and offers free rotation for the life of the tires. I have purchased every set of tires that have gone onto my small fleet of vehicles for the last 25 years from this dealer. As a result of this, I also receive free balancing (if required) at the time of rotation.

Tire rotation seems to pop up quite often, about 4 times a year, as my Tahoe gets driven quite a few miles a year, all for business.

Just my opinion, but Nitrogen seems to provide a benefit to me at a low cost.

Your results may vary.

 

[standby-V]

Tire PSI

In response to the original question, I run my tires at 32F, 34R. Your opinion may vary.
And as much as I hate wading into Nitrogen discussion, Nitrogen is more stable at temp, and drier than compressed air. That's the reason it is used in aircraft and most race car tires. That said, I run air in my tires.
Bruce

You say race cars? I watch a lot of NHRA drags and NASCAR and every time that they mention tire pressure it's always air they take out or put in, and it's usually very little, but never mention Nitrogen.

 

[Crimson Pearl]

You say race cars? I watch a lot of NHRA drags and NASCAR and every time that they mention tire pressure it's always air they take out or put in, and it's usually very little, but never mention Nitrogen.

Here's an interesting article : Nitrogen in Tires : Information about Nitrogen Tire Inflation News, Benefits, Generator Dealers, Location Finder & More

It says that the nitrogen is delivered to tracks by Praxair.

I suspect the reason you hear them talk about taking out or putting in air is the same reason they say they had motor trouble.

The correct term would actually be engine, but old habits die hard!