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Old 03-15-2019, 12:02 PM   #1
wilkin250r
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Join Date: Sep 2010
Location: Lake Tahoe, Nevada
Posts: 755
Pros and Cons of fuel return line...

So my street-ready restoration project is nearing some final details. It's a 72, but I don't think the tank is original because it was my understanding that 72 had a vent line on the top of the tank, and mine certainly does not.

However, it DOES have a return line that is currently just hanging out in the engine bay, and pukes fuel if you fill the tank up all the way. I assume it was originally hooked to a fuel pump with a return line, but that fuel pump left eons ago with the old engine. Current fuel pump has no provisions for a return.

I've heard of people hooking up the return line to a "T" fitting with a small orifice, and this logic makes sense. I can certainly see this eliminating vapor lock at the carb. Am I more likely to get vapor lock from tank to pump, or pump to carb?

So my options would be to just plug the line, replace the fuel pump with one designed for a return line, or hook it up near the carb with a "T" fitting.
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