Fuel Filter b4 Electric Pump or After?

[palerider94]

Mounted electric pump on my car. Made sure it was close and below gas tank. Question I have since these pumps are made to push fuel instead of pull - should I have mounted the filter after the pump instead of before or does it make that much of a difference - just curious on what others have done.

 

[Rusty67]

With an electric pump it is a MUST to have a filter BEFORE the pump. Doesn't hurt to have one up front near the carb as well, who knows what kind of crap is running around in your gas lines between the pump and the carb.

When I put one on my friends Cougar we put one pre-pump and just before the carb as well. Fuel filters are cheap, pumps and carbs are expensive.

 

[tx65coupe]

I would put the filter after the pump. Thats how most cars come factory.

 

[Rusty67]

The reason the filter is after the pump in modern production cars is because they use an in tank pump that has a fuel tank which is known to not have rust and other sediment from 40+ years of service which can clog/ruin a fuel pump.

In tank electric pumps are the way to go if you can swing it. They are quieter and more reliable.

 

[tx65coupe]

Although I run a mechanical pump, I have 2 filters one before the pump and one before the carb. Like he said, pumps and carbs are expensive, filters are not.

 

[D.Hearne]

With an electric pump it is a MUST to have a filter BEFORE the pump. Doesn't hurt to have one up front near the carb as well, who knows what kind of crap is running around in your gas lines between the pump and the carb.

When I put one on my friends Cougar we put one pre-pump and just before the carb as well. Fuel filters are cheap, pumps and carbs are expensive.

Ditto, this is what I do as well. And I never have carb problems.

 

[PM 65]

Ditto, this is what I do as well. And I never have carb problems.

This is also my setup, one filter before and one after the pump (mechanical). No dirt in the carburetor since then...

 

[palerider94]

I got mine mounted before the electic pump. That seemed to make sense to me. Did not want to get trash in it. Reason I questioned is that someone looking at my set up mentioned it would restrict pump making it work harder.

 

[PM 65]

I got mine mounted before the electic pump. That seemed to make sense to me. Did not want to get trash in it. Reason I questioned is that someone looking at my set up mentioned it would restrict pump making it work harder.

As long your filter is not undersized, i see no problem with that. These things are aviable in all possibly dimensions with big filter inlets. I always used 1 step higher as needed and never had any problems on any car. Other suggestions?

 

[D.Hearne]

I got mine mounted before the electic pump. That seemed to make sense to me. Did not want to get trash in it. Reason I questioned is that someone looking at my set up mentioned it would restrict pump making it work harder.

I'm running a 35 gal/hr Mr.Gasket pump. It supplys plenty of fuel for full power runs (331 topped with 3 - 2 bbl carbs)until the inline filter between it and the tank gets full of trash. That's when I know the filter needs changing..........the engine starves for fuel.

 

[blown65]

Mines on after the pump, but I have an aluminum fuel cell and use gas out of cans so its pretty controlled what gets pumped.

Stock tank, I would always have one prior to the pump.

 

[iskwezm]

some pumps will cavitate with a pre filter

 

[Rusty67]

I would think that if a pump is having problems with cavitation because of the filter it is provably because the filter isn't big enough to supply the pump what it needs in all conditions.