Physically Impossible

That's why I put an axuilary electric (flow thru) fuel pump on my Barracuda. I turn the key to "on" then flip the fuel pump switch....let it pump up the fuel to the carb (and mechanical fuel pump), it helped a lot.

I've been going back and forth on whether I ought to put in an electric fuel pump, or just stick with mechanical. I just had an idea for startups, I'll draw up a little diagram when I get home.