[aerobod]

Originally Posted by Ravenseal

K lol

Science! Of course.

[Ravenseal]

Originally Posted by aerobod

Science! Of course.

I already put nitrogen in my tires months ago at Costco, for free, and the tire pressure has been extremely stable in temperatures between 0 and 50F. So congrats on winning an internet argument, I guess?

[aerobod]

Originally Posted by Ravenseal

I already put nitrogen in my tires months ago at Costco, for free, and the tire pressure has been extremely stable in temperatures between 0 and 50F. So congrats on winning an internet argument, I guess?

Obviously not scientifically measured. You would also need to monitor tyre temperature and pressure change, besides ambient temp.

If you can disprove nitrogen doesn’t closely follow the Ideal Gas Law with a properly peer reviewed paper, you could pay off any loan on the G87 with the $1m Nobel Prize Award

[aerobod]

Originally Posted by Ravenseal

It’s practically stable. That’s all that matters to me. Enjoy teaching middle school chemistry.

Two weeks ago it was 10C here with tyre heating up to 20C with steady highway speeds, it was close to -40C here a few days ago. Nitrogen or dry air filled tyres would have dropped from 2.4bar to 1.7bar without increasing the pressure in them (as I did), I wouldn’t call that ‘practically stable’.

Costco marketing is good at getting people to drop by to add nitrogen for free and buy other stuff.

[Ravenseal]

Originally Posted by aerobod

Two weeks ago it was 10C here with tyre heating up to 20C with steady highway speeds, it was close to -40C here a few days ago. Nitrogen or dry air filled tyres would have dropped from 2.4bar to 1.7bar without increasing the pressure in them (as I did), I wouldn’t call that ‘practically stable’.

Costco marketing is good at getting people to drop by to add nitrogen for free and buy other stuff.

Bet. Tell you what. You drive to Denver and I’ll give you my keys and address. You can go deflate my tires and put regular air in them. Let me know via DM.

[aerobod]

Originally Posted by Ravenseal

Bet. Tell you what. You drive to Denver and I’ll give you my keys and address. You can go deflate my tires and put regular air in them. Let me know via DM.

Thanks for the offer, but I don’t have that sort of time to waste, much that I like the Denver area, but I’m sure you must be capable of doing that yourself?

[Ravenseal]

Originally Posted by aerobod

Thanks for the offer, but I don’t have that sort of time to waste, much that I like the Denver area, but I’m sure you must be capable of doing that yourself?

Nah. I’m good with nitrogen in my tires, but you seem hellbent on continuing this discussion. You must not have anything else to do in Calgary since it’s -50F. Try some new hobbies.

[aerobod]

Originally Posted by Ravenseal

Nah. I’m good with nitrogen in my tires, but you seem hellbent on continuing this discussion. You must not have anything else to do in Calgary since it’s -50F. Try some new hobbies.

I have plenty of hobbies thanks. Quite happy to multi-task on Internet chat groups between the hobby work, while doing more important things, such as watching TV,

[Carefree]

Originally Posted by aerobod

It is easy to predict the pressure in the tyres when filled with nitrogen. Radial tyres are very predictable in volume when inflated to fully support the car and used within their speed rating. The volume stays constant within a very small percentage due to the steel belts in the tread and sidewall reinforcement, so don’t expand like cross-ply/bias-ply tyres do.

This means that P∝T.

It is then easy to compare absolute temperatures and pressures, bearing in mind the actual pressure is the measured tyre pressure plus atmospheric pressure, the actual temperature is relative to absolute zero, so is best calculated in Kelvin.

293K / 20°C / 68°F at an absolute pressure of 3.40bar (measured 2.40bar / 34.8PSI at sea level), equates to:

313K / 40°C / 104°F at an absolute pressure of 3.63bar (measured 2.63bar / 38.1PSI at sea level)

273K / 0°C / 32°F at an absolute pressure of 3.17bar (measured 2.17bar / 31.4PSI at sea level)

233K / -40°C / -40°F at an absolute pressure of 2.70bar (measured 1.70bar / 24.7PSI at sea level)

Don’t confuse him with science. Middle school egos are easily bruised.

[izzyM2]

I guess I need a Costco membership.

[Carefree]

Some posters are full of hot air, the less relevant are full of hot nitrogen.

[Carefree]

Originally Posted by Ravenseal

For your above-average middle school intelligence, you really can’t take the hint that I don’t give a fuck.

I’m uncertain if you belong in the “some” or “less relevant” group but vulgarity is unseemly. Perhaps Bimmerpost will dispatch a NM (Nurse Moderator) with some lidocaine to treat your exposed nerve.

[Ravenseal]

Originally Posted by Carefree

I’m uncertain if you belong in the “some” or “others” group. Perhaps Bimmerpost will dispatch a NM (Nurse Moderator) with some lidocaine to treat your exposed nerve.

Have a nice day, bud. I’m still not going to deflate the nitrogen out of my tires.