I just saw this that explains the deflate-o-math:
http://www.americanthinker.com/blog/...d_physics.html
I forgot to convert gauge pressure to absolute pressure which makes it seem like it takes more of a temp difference to change the pressure.
This is the basic law for the relationship between pressure and temperature:
https://en.wikipedia.org/wiki/Gay-Lussac%27s_law
In the article he said Charles's Law, which is for volume and pressure.