Fuel Filter Location

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KOZ45

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I am running a 3/8" rubber line from the Edelbrock #1723 mechanical pump (hose barb) to the Holley #34-150 dual feed fuel line (hose barb)

I need to splice in a filter between the fuel line and the mechanical pump.

Where does the filter need to go

1968 440.......if this matters

I found this link and am wondering how pertinent the location of the fuel filter is:

Carburetion and Performance Diagnosis (Session 188) from the Master Technician's Service Conference

Says as long as the filter is upright and looks like its right below the alternator?


upload_2019-9-26_13-47-39.png
 
That article tells you why.......away from engine heat, IE away from exhaust and not on top of the hot engine. The PROBLEM is that modern alcoholized gas boils easier, and is more subject to vapor lock problems. Go to MyMopar and download a couple of service manuals, if you have not already.

Look up the 69/ 70 440/ 440-6 or hemi in the fuel section re: the third line return can. You can duplicate that with a couple of different Wix filters, but of course you'll have to build a return line

Best thing I did on my 67, before I converted to EFI, was to convert to a rear mount electric pump (pushes not suction, so increases fuel pressure because it doesn't "suck"), I built a return system, and used a big insulated spacer under the carb. There is some evidence that Carter/ Edelbrock carbs may be worse because the float boats sit down flat on the intake.

Wix 33040 (5/16) or 33041 (3/8) both have a built in 1/4" return port (orifice). This port must be "up" and return to the tank

31KUuv21WdL._AC_.jpg
 
What 67Dart273 said. Chrysler put them there to be cooled by the engine fan(as much as possible I guess)
 
Fuel injected vehicles have a filter usually located below the passenger side seat area. Good idea to have an extra filter before the pump as well as after. Especially if you are going to run a Holley carb. They hate dirt.
 
67Dart273 said:
That article tells you why.......away from engine heat, IE away from exhaust and not on top of the hot engine. The PROBLEM is that modern alcoholized gas boils easier, and is more subject to vapor lock problems. Go to MyMopar and download a couple of service manuals, if you have not already.

Look up the 69/ 70 440/ 440-6 or hemi in the fuel section re: the third line return can. You can duplicate that with a couple of different Wix filters, but of course you'll have to build a return line

Best thing I did on my 67, before I converted to EFI, was to convert to a rear mount electric pump (pushes not suction, so increases fuel pressure because it doesn't "suck"), I built a return system, and used a big insulated spacer under the carb. There is some evidence that Carter/ Edelbrock carbs may be worse because the float boats sit down flat on the intake.

Wix 33040 (5/16) or 33041 (3/8) both have a built in 1/4" return port (orifice). This port must be "up" and return to the tank

View attachment 1715590838
Click to expand...

Apparently the 33041 for (3/8") is discontinued. How bad would it be to use the 33040? I have a 440.
 
Trudd said:
I'm currently running something similar. I want to switch to a filter with a return to help with heat soak/vapor lock I experience when trying to restart the car once the engine is good and warmed up.
Click to expand...
I have a 68 dodge van .they are notorious for heat soak vapor issues. I put a Carter electric fuel pump on it with the filter out back at the pump. It's wired through a controller that acts like a tach signal .pump only runs when it detects rpms as a safety control. I also wired a momentary switch to it so I can prime the system. I never got around to a return line as the way it is works great.
 
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