[Fot] Cooling fuel to take up less volume

[William G Rosenbach]

I was amazed just how much gasoline expands when warmed. In my '76
Spitfire, when I was going on long drives, I had a section of 3/16 copper
tubing bent into a 'J'.  I would insert it into the fuel tank inlet to
vent the air space at the top of the tank. On one occasion, my time from
fueling to departure got extended a bit and the car was parked in the
sun. When I was ready to leave, there was a sheet of gasoline cascading
off the boot lid. I'm sure if I had popped the gas cap open, it would
have gushed at least a foot above the inlet. That was probably less than
a 25'F increase.
Never did that again unless I was driving it immediately after fueling.
Bill
   
On Mon, 22 Oct 2007 08:00:04 EDT DSPGTi at aol.com writes:
> If I remember correctly, the expansion rate for gasoline is about .6% 
> for  
> every 10 degrees F. So if you drop the fuel say 40 degrees, you 
> decrease the  
> volume by 2.4%. Will that make a significant enough difference?
>  
> Dave Y.
> 
> 
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