Fuel pressure regulator

[Old Henry]

Originally Posted by Ford Freak

So , what happens to the float valve with 4 lbs. of pressure ? Does it make the carb leak ? Float too high ?

Originally Posted by 51 MERC-CT

If you have a low pressure pump there is no reason to have a pressure regulator, especially when it's a stand by pump.

Originally Posted by Old Henry

That's what I thought and tried to do without the regulator. Unfortunately, the 1-4 lb pump pumps at 4 lbs and the carburetor float valve only handles 3½ lbs. So, I had to add the regulator, even for very brief use of the pump. Such brief use is usually not enough for me. I need at least a minute or two and usually longer, especially climbing mountains at high altitude, even in cool weather, the pump has to be run continuously.

I think a correction to my information may be in order. I know that when I installed the pump in my 51 I didn't need a regulator because the carburetor float valve in that year of car would hold more pressure. I had no problem running the pump continuously.

I don't know what carburetor a 49 has in it and whether it will hold 4 lbs. pressure. You would need to check the specs and see. You may not need a regulator. One good way to know is try it without and see what happens. If the carburetor doesn't flood you don't need a regulator.