<VV> Healthy pumps?

[Jack Kean]

I inserted a fuel pressure gauge in the fuel line, in place of one of 
the secondaries in my 140 hp yesterday. It was registering around 8 
pounds at idle, 9 pounds per square inch off idle. Seems at least double 
the numbers listed in the shop manual. I am not sure of the source of 
this mechanical pump, since it was on the car when I purchased it. I 
will be looking into a fuel pressure regulator, which I will be able to 
continue to use if I chose to change to an electric fuel pump.

jack kean

--one other thing. I previously removed the top coil from this unit. I 
wonder what the pressure was with a untouched spring.

Frank DuVal wrote:
> But the spring IS the regulating mechanism in the pump. There is no other regulator. Just like the oil pressure regulator is the spring pressure. The air regulator on your air line uses the spring pressure to regulate the pressure. The fuel pump is pushing pressure against the inlet valve in the carb, which is resisting with the float pushing on the fuel level. So, the bigger the spring constant in the pump, the harder the force on the float. None of the check valves stop the fuel from leaving the pump through the outlet fitting........
>