Posted by Dave Allgire on August 04, 2009 at 15:44:21 from (96.35.216.238):
In Reply to: Re: F 14 fuel system posted by Tom 43 on August 04, 2009 at 13:49:57:
You are probably thinking of the fuel line vent that sticks up through the hood right in front of the gas tank. This has a plug on top that has a breather hole drilled in it that allows atmospheric pressure in. On the bottom there is a tee, the bottom connecting to the fuel pump outlet and the side going to the carb. The other fitting is larger and is a return to a tee in the inlet line to the fuel pump. The internal construction of the vent ensures a positive pressure on the line going to the carb. Since the fuel pump puts out more than the carb can use, the overflow enters the return line to the tee in the inlet line to the fuel pump. It's the same principle as the restrictor tee, just a different way of doing it. As you can see both the tank tee and the fuel line vent are both higher than the inlet to the carb. It's a matter of gravity.
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