Nitrogen tire PSI?

brucelidat · 06-20-2012, 05:31 PM

So I just had a patch done on one of my tires and they also filled all 4 with nitrogen. I know Nissan recommends 35psi cold, but is that taking into account expansion when hot? If so, should my nitrogen tires be higher than the cold 35psi recommendation since nitrogen doesn't expand?

edub370 · 06-20-2012, 05:38 PM

hmm never thought of that. probably not enough to worry about over filling. previous owner had nitrogen in mine. going with good ol fashion air this time around tho

kenchan · 06-20-2012, 05:47 PM

yah, 35psi air is on the comfy side. usually on a hot summer day 35psi can go as high as 40psi with sprited driving.

i think with nitrogen i would use something in the middle like 38psi cold. i dont have a nitrogen tank at home and i like to have flexibility to adjust my psi at home, so i just use air. i use 37.5psi on both my Z and G cold (air) as i like to have firmer ride.

brucelidat · 06-20-2012, 05:53 PM

also, should I have any concerns about tracking on a patched tire?

mhcoss · 06-20-2012, 05:59 PM

well if you really want to know... calculate this out for us using the gas equations of state! Tell us your results :P

MattP725 · 06-20-2012, 06:00 PM

Quote:

Originally Posted by brucelidat

also, should I have any concerns about tracking on a patched tire?

If they patched it and didn't plug it and it was center tread I wouldn't worry... if it was plugged and/or close to the sidewall you may want to consider replacing. If you ever see them patch it, they usually seal it pretty tightly. It is still a weakness though so you have to use some sound judgement.

brucelidat · 06-20-2012, 06:10 PM

Think I'll go back and have them adjust it to 38 psi or so. My tires got up to 40-41 when hot with air so that's in the middle.

06-20-2012, 05:31 PM	#1 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 31	Nitrogen tire PSI? So I just had a patch done on one of my tires and they also filled all 4 with nitrogen. I know Nissan recommends 35psi cold, but is that taking into account expansion when hot? If so, should my nitrogen tires be higher than the cold 35psi recommendation since nitrogen doesn't expand? __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

06-20-2012, 05:38 PM	#2 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 20	hmm never thought of that. probably not enough to worry about over filling. previous owner had nitrogen in mine. going with good ol fashion air this time around tho __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

06-20-2012, 05:53 PM	#4 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 31	also, should I have any concerns about tracking on a patched tire? __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

06-20-2012, 06:10 PM	#7 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 31	Think I'll go back and have them adjust it to 38 psi or so. My tires got up to 40-41 when hot with air so that's in the middle. __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

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06-20-2012, 05:47 PM	#3 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	yah, 35psi air is on the comfy side. usually on a hot summer day 35psi can go as high as 40psi with sprited driving. i think with nitrogen i would use something in the middle like 38psi cold. i dont have a nitrogen tank at home and i like to have flexibility to adjust my psi at home, so i just use air. i use 37.5psi on both my Z and G cold (air) as i like to have firmer ride.

06-20-2012, 05:59 PM	#5 (permalink)
mhcoss Track Member Join Date: Feb 2012 Location: Edmonton Posts: 520 Drives: 2012 370Z SPORT M/T Rep Power: 14	well if you really want to know... calculate this out for us using the gas equations of state! Tell us your results :P