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Fuel cooling has been an issue since the late '80's when a fuel limit was placed on F1 and no refuelling took place during the race. By cooling the fuel, the amount of fuel that could be stored in the tank could be increased. By the time the fuel warmed to ambient temperature, there wood be space in the tank to allow for expansion. Fine, in theory, but if there was a stoppage soon after the start, the fuel would warm up and increase the pressure inside the tank, an unacceptable safety hazard. What made people sit up and think again was Berger's fiery crash at Imola.
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