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In a message dated 2/6/2005 9:47:48 PM Pacific Standard Time, daveleonard@cox.net writes:
It will probably expand in the tank but I don't expect that will occur faster than it is used up. I have no guess as to what temp will become steady state for the fuel pumped out of the tank. My guess is that it will not be much warmer than normal, but a slight increase in temp may help with vaporization
Dave,
I think you should pass on this one. The problem of vapor lock is a very real possibility. Another problem is how your tanks are plumbed. Lots of people is one-way valves air in with a check ball to prevent fuel from flowing out. If you are plumbed that way you could pressureize your tanks. I don't think liquid expansion would be a problem. The problem would be high vapor pressure in the tank. If a lot of vapor is caused by higher temperature fuel the tank might burst or leak, or at least deform. I have seen this happen on an endurance racing motorcycle with the check valve set-up. The tank had one of those trick dry-break quick-fill systems where you can load 5 gallons of fuel in seconds. The system also had the check valve I described above. The bike came in for a standard stop, was filled and then a bad wreck caused the race to be stopped for a while. The tank ws heated by the engine heat while full and deformed and caused several pinhole leaks at the welds, it was ugly. While the idea itself has merit I don't think the risk is worth it.
Bill Jepson
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