Quote Originally Posted by 928 View Post
the bladder in the fuel tank was used at lemans years ago (and may still be) as the french have a strictly enforced fuel tank capacity. the inflatable bladder is sealed after the tank volume is corrected.
chilling fuel to increase the volume was also used in F1 good for another gallon (4.55l for the metricated) in a 38gallon tank.
Les Small tried chilling the fuel in the Roadways Commodore (Percy/Grice) at Pukekohe once. However the ambient temperature was greater than fuel was able to be consumed and as a result the tank split halfway down the back straight leaving 120+ litres on the track. The phrase "if you cant beat them by fairs means try foul" doesn't always work.