Dry Ice in your fuel cell?

[art leong]

At Indy a few years ago. I saw some superstockers during class carrying fuel jugs with blankets on them. Went over and saw the moisture on the outside of the jugs.
It seemed hush/hush but I Added 2+2. Seemed like a great idea. Especially with fuel injection (injector about 3 inches from intake valve). It has to cool the incoming air. My air temp sensor is way ahead of the injector (so ambient air), so I don't know how much.