Will a mechanical fuel pump be able to draw through the electric fuel pump in the tank? If not will an electrtic pump made for a carburator?

 

make sure you watch what fuel pressure the electric puts out you can blow the jets out of ya carb not made for high fuel pressure like injectors are

 

An electric pump should only put out what is needed. You may need a regulater for it though. I don't know if you can pull through a pump. Why do you ask? Do you have a bad one? I would pull the pump out and run a small pipe to the bottom of the tank. ( with a screen, of coarse)

 

My grandson and I are installing a carb engine in his 89 FSB, replacing a very worn EFI engine. I have been reading and asking questions about fuel delivery for this conversion. This is what I have been told on the subject, the correctness of any of this is unknown at this time:

1. The high-pressure pump on the frame will not work with a carb because the pressure will be too high.
2. A fuel pressure regulator can't be used because it will cut down the fuel flow too much.
3. The high pressure pump can be disconnected and bypassed and the low pressure pump in the tank will supply enough fuel pressure for a carb.
4. The low pressure pump in the tank won't supply enough pressure for a carb so the pump will have to be replaced with a regular sending unit. Then an electric pump with the correct pressure will have to be installed outside the tank because the EFI engines don't have the capability of using a mechanical pump and the pump won't clear the engine accessories anyway.
5. The best way to go is to use a timing cover made for use with a mechanical pump and put a new sending unit in the tank, removing the low pressure pump.

We are going to disconnect the wiring from the high pressure pump and bypass it. We are going to try to use the low pressure pump in the tank for fuel delivery. The wiring to the low pressure pump will be through the inertia switch. The Holley carb that we are going to use will be okay with up 14 pounds of pressure.
So, we'll see I guess and then we will know what works and what doesn't.

 

Here's a thought, if you're going to install a secondary pump anyway, why not put it where the H.P. pump is now? Then you could use the same lines and wiring.