http://www.grandprix.com/ns/ns14361.html
Apparently teams will be testing pressures during stops and altering if required.
The Formula 1 pit stops this year will not feature tyre changes but while race fans might worry that watching fuel being pumped into a car is not very excitement we understand that things will be a little bit more exciting than expected because the teams will be using hand-held tyre pressure adjustors with which they will be able to increase or decrease the pressure of the tyres to take account changing temperatures.
If this was April I would have looked twice at this one...!