Your question: Does a carburetor need a return line?

If you’re running the original pump for fuel injection then you do need a return otherwise your pump will burn out. Depending on what injection style you had it would be around the 30 psi mark but a carb only needs about 5-9 psi depending on your setup.

Does a carbureted engine need a fuel return line?

Truth be told, many carbureted engines run just fine with a deadhead-style fuel system. … In contrast, a bypass regulator bleeds off excess fuel pressure, dumps it into a return line, and re-circulates the fuel back into the tank.

Do all carburetors have return line?

Registered. Yes, depends on the setup….. most aftermarket regulators have a return port in them. If you run a return your pump will run cooler and run for longer.

Where does fuel return line go on carburetor?

The feed line goes to the rear of the fuel log next to the firewall. The regulator is mounted on the front side of the fuel log which is the exit side. From there the pressure is adjusted and the return then comes out of the bottom of the regulator and back to the tank.

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Why do you need a fuel return line?

It’s primary purpose is to return excess fuel from the carburetor to the fuel pump, however it serves other important functions as well. Aside from providing a path for excess fuel to return to the tank, the fuel return hose also prevents vapor lock and over pressurization from occurring within the carburetor.

How much fuel pressure is needed for a carburetor?

Fuel pressure should be set between 6 and 8 psi for a gasoline carburetor. An alcohol carburetor is a different animal with very different requirements. The Alky carburetor will require 4 to 5 psi at idle and 9 to 12 psi at wide open throttle.

What size should my fuel return line be?

What size should my fuel return line be? … The Fuel Return Line should be at least the same size, or one size larger than the supply. The return line should direct fuel close to the bottom of the tank and away from the pickup.

Do I need a return line with a fuel pressure regulator?

Requires no fuel return line and fittings from the regulator to the fuel tank. This reduces weight, complexity (routing a return line can prove to be difficult), and expense. … Multiple regulators (set at different pressures, such as with a nitrous oxide system application) may be used from one pump.

Who makes the best fuel pressure regulator?

The Top Fuel Pressure Regulator Manufacturers Globally:

  • Holley Fuel Pressure Regulator.
  • Aeromotive Fuel Pressure Regulator.
  • Bosch Fuel Pressure Regulator.
  • Tomei Fuel Pressure Regulator.
  • Edelbrock Fuel Pressure Regulator.
  • Delphi Fuel Pressure Regulator.
  • Pierburg Fuel Pressure Regulator.
  • Spectre Fuel Pressure Regulator.
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Can you run 2 fuel pressure regulators?

Regulator 2 should run just one line to the fuel solenoid and block off the second port of the regulator. Yes you do need 2 fuel pressure gauges to adjust the system correctly. Make sure you flow the plate at 6 psi and run 900 psi at the bottle. It is very important to check the sytem with it flowing.

Which fuel line is the return line?

The vapour-return line normally runs from the fuel pump or the fuel filter to the fuel tank. This vapour-return line is connected to a special outlet in the fuel pump. Any vapour that forms in the fuel pump returns to the fuel tank through this line.

Can you use an electric fuel pump with a carburetor?

Yes, you can and some cars like Chevrolet Vegas and equipment was factory manufactured with electric fuel pumps. Many electric fuel pumps are designed to run in fuel tank or inline outside the tanks , with pre-set fuel pressure for carburetor use.

What are the symptoms of having air in the fuel line?

Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. Keep your fuel lines free of air to help keep your car running smoothly. Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. Keep your fuel lines free of air to help keep your car running smoothly.

Can you plug a fuel return line?

you could plug both ends of the line… and next summer you will be posting why your car won’t start, when it is Hot. the purpose of the return line is to reduce the fuel temperature, to keep it from vaporizing when Hot. The fuel lines can be replaced by raising the passanger side about 4″ off the frame.

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How do I know if my fuel line is clogged?

Engine Is Cutting Out

If your fuel line is blocked or leaking, your engine won’t get enough fuel, or it’ll get fuel in inconsistent spurts. That’ll cause engine sputtering or it may force your engine to cut out. Don’t run your engine if it is sputtering. A sputtering engine will likely damage itself.