Quote:
Originally Posted by Jack Stands
Or switch to a low pressure pump like a Pierburg, making the regulator less necessary. It doesn't take too much pressure to overwhelm the needle valves on Weber carbs, I'd try to stick to 3.5 psi.
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The fuel return line could dump excess fuel into a gas can and the system should still regulate the fuel pressure at the selected threshold. If it's different - tank vs gas can, there remains an issue in the return line.
Agree. Asking PMO's rudiimentary pressure regulator to drop 73 psi line pressure to 3.5 is probably an excessive demand. Try a low pressure pump (Pierburg, Airtex, etc. or equivalent). My 2.7 RS-spec engine managed nicely with a dead-head circuit (no fuel return) using an Airtex 4-5psi pump (mounted at the tank). With the usual pressure drop between the pump and carbs, the fuel pressure measured at the carbs was 3.5-4 psi.
Sherwood