Fuel Vaporization Using Eddy Carb -- In-Line Fuel Pump Question

"The thing" about fuel pumps and "where they are."

All things being equal, IE line routing and fuel pressure, an electric pump IN THE REAR is always going to give less trouble for vapor lock, "why is this?"

It's because even with a clean "free flowing" suction line to an up-front mechanical pump, there is ALWAYS some pressure drop from the tank to the pump.

This is a slight VACUUM, and because it's lower pressure, it LOWERS the boiling point of fuel.

An electric pump helps keep that entire line from the tank to the front of the car UNDER PRESSURE which RAISES the boiling point of fuel and helps prevent boiling and vapor lock.

It's well documented that folks have troubles with Ed carbs, but I don't believe "it's the carb" per se. While it's true that Holley, with the float bowls ABOVE the manifold and with "some" airflow around them, "do better," the FACT is that "in another time" many of us ran AFB, AVS carbs with no problems.

The problem is MODERN FUEL, not the carb