Packard Forum Index » V-8 (1955-56)

In regards to O_D's #27 post: This is what I was thinking, and knowing which part of the fuel system is most susceptible to vapor locking would help in preventing or minimizing it. As you point out, fuel in the carburetor bowl would not be under pressure and would boil-off if temperature too high. So, it look like the most benefit can be realized by addressing the condition between the tank and pump. This is why mounting an electric fuel pump as close to the tank is recommended - it is to pressurize the line. Often this is misinterpreted that an electric pump is better at "pushing" than "pulling". Now we know. Thanks.

(o{I}o)

Let's remember vapor lock isn't a new phenomonon in carbureted cars since the advent of ethanol in gasoline, though that may have caused to reach new heights. As far back as the early 30s Packard issued notice in a Service Letter about moving the tailpipe from the left side to the ride side to eliminate vapor lock caused by proximity of the fuel suction line and the tail pipe.