agesilaus
05-15-2008, 05:56 PM
I had the opportunity to use a tank of nitrogen today and purged one tire and filled it with N2. I didn't have any way to pump out the tire and didn't want to drop the pressure too low so I bled it down to about 16-18 psi three times and filled it back to 45 psi with N2 each time. That should have dropped the O2 to about 1% and increased the N2 to 99%.
This is the rear passenger side tire on my 2008 F-150. Tires are basically new with 4500 miles on them. I adjusted the other rear tire to 45 psi air.
My plan it to check them both with an ir thermometer that I got from Harbor Freight. The first trial after 20 miles at highway speeds was 104 F on the air filled tired side wall (checked at 3 places) and 103 F on the N2 filled tire.
Checking the tread temp was 114/112F air/N2
Not too impressive so far. I checked the sidewall temps before doing this and they were within 0.5 F before doing this.
I'll try to remember to check it after towing the TM 70 miles to Suwannee Valley CG tomorrow. I'd like to try it on the TM.
BK
This is the rear passenger side tire on my 2008 F-150. Tires are basically new with 4500 miles on them. I adjusted the other rear tire to 45 psi air.
My plan it to check them both with an ir thermometer that I got from Harbor Freight. The first trial after 20 miles at highway speeds was 104 F on the air filled tired side wall (checked at 3 places) and 103 F on the N2 filled tire.
Checking the tread temp was 114/112F air/N2
Not too impressive so far. I checked the sidewall temps before doing this and they were within 0.5 F before doing this.
I'll try to remember to check it after towing the TM 70 miles to Suwannee Valley CG tomorrow. I'd like to try it on the TM.
BK