Anybody have any real world data from their data sheets that demonstrate the differences between a tire filled with 'air' vs dry nitrogen? For instance... my cold pressures for Mosport with 'air' from my little portable battery powered Campbell Hausfeld compressor are:

LF 30 RF 31
LR 32 RR 33

Car weighs 1950lbs empty, 205/50/15 Toyo RA-1 tires.

'GENERALLY' ... Hot pressures are 40psi all the way around, but it varies on the humidity... maybe by a psi or two...

I'm interested in switching to Nitrogen because I'm likely going to keep a tank in the trailer for air tools. What do people experience and what is the difference in starting pressures that one sets from air to nitrogen to get to a desired end point?