Sideband
Guest
Kaiser442:A good thought - but the amount of air you add to get neutrally bouyant should only be a few breaths' worth. I can't imagine it would make a noticeable difference.
I agree with the tank-cooling idea. That was my assumption when I noticed the same phenomenon. It's a good reminder that it works the same in the opposite direction - so don't ever leave a full tank in your car in the summer!!! BOOM!
How hot is your car? Even an increase of 50 degrees F only amounts to an additional 250 - 300psi. I have 4000psi burst disks in my tanks. The temperature would have to increase ~200 degrees before my burst disks even blew.
Joe