Fuel pump install question

Ohmess

Ohmess

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So, I am converting to an electric fuel pump and have a question. I want to install the pump low on the car, probably attached to the diff carrier, and am thinking about plumbing.

I don't have holes in the trunk to run fuel lines, so the question is should I drill holes in the underside of the car to run the lines to the pump, or should I cut out a section of fuel line underneath the car?
 
Would you like a pic of the routing of a csi plumbing in the trunk?
 
Here's my setup, through the existing plug holes in the trunk and fuel pump attached to diff. Filter before pump. Pump down low prevents vapor lock:

IMG-20120602-00475.jpg


IMG-20120602-00474.jpg
 
Last edited:
Steve:

A slick installation. What model Carter pump are you using? I'm guessing it's something like the CRT-P4070 with a 4 - 8 psi output. Do you use a pressure regulator downstream of the pump?
 
I used the in-tank lift pump from an early E24 in my Bavaria, along with the stock fuel line. It puts out about 3#, plenty of fuel to run twin Webers.
 
Yes it's a 4070. Subsequent to that pic taken I installed a Holley regulator on the other hose next to the filter and set it at just under 3lbs then took the pressure gauge off. So the fuel goes from the tank through the side hole into the spare tire compartment, through the filter, out through the back hole to the pump then back up through the hole through the regulator then back into the fuel tank side and to the engine as normal.

The pump has the 3 rubber isolators that it hangs from and I also cut and fit an old mouse pad to mount between the bracket and the diff mount for extra noise reduction. Can't hear the pump from inside the car.




jmackro said:
Steve:

A slick installation. What model Carter pump are you using? I'm guessing it's something like the CRT-P4070 with a 4 - 8 psi output. Do you use a pressure regulator downstream of the pump?
Click to expand...
 
I put my pump and fuel filter in the trunk for access and to protect it from road crap. Re-read your post and sounds like carb engine so this off topic. Apologies to all.

IMGP4657.jpg
 
Stevehose said:
Yes it's a 4070. Subsequent to that pic taken I installed a Holley regulator on the other hose next to the filter and set it at just under 3lbs then took the pressure gauge off. So the fuel goes from the tank through the side hole into the spare tire compartment, through the filter, out through the back hole to the pump then back up through the hole through the regulator then back into the fuel tank side and to the engine as normal.

The pump has the 3 rubber isolators that it hangs from and I also cut and fit an old mouse pad to mount between the bracket and the diff mount for extra noise reduction. Can't hear the pump from inside the car.
Click to expand...

So Steve, your regulator is in the trunk as opposed to under the hood?
 
You want the pressure regulator close to the carburetors, no line losses. If you use a Holley deadhead regulator you can plumb one side to each carb.
 
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