[BlackStick]

Where would one best locate a fuel filter here?

 

[Matter]

I would think ideally anywhere between the pump and regulator. Technically you could go ahead of the pump but because pumps push better than they suck you would probably want to upsize the filter to avoid any possible restriction. Weber IDF's don't like much pressure but they do need the volume.

 

[BlackStick]

Then I have to cut the AN hose... Hoping to avoid that.

 

[Baz D]

There are filters than use AN fittings which you can put between the hose and pump, no cutting required.

 

[LeeFred]

Get yourself a filter with AN fittings like Baz D says and install it either between the pump and the hose, or between the hose and the regulator. My personal choice would be between the hose and the regulator.

 

[jamesgang]

I personally like the filter before the pump but you could get one of these AN style filters and put it right before the regulator.

 

[Bad66GT]

This what I have and would fit the bill nicely.

Male AN-06 cellulose 10m Filter – Aeromotive, Inc

Chris

 

[LeeFred]

Curious....would the stock 65 fuel pump with the built in fuel filter be enough to feed a Weber setup? @zray ?

 

[W427]

Typically, 3 filters are in performance systems (4 on EFI). A coarse pickup filter ("sock"), a pre-pump filter of 100-150 micron, and a pre-carb filter of 30-50 micron for carbs, or around 10 micron for EFI. Each filter protects the next, by filtering larger particles that would quickly load the next filter, also allowing smaller filters at each stage without sacrificing flow or adding excess maintenance.

Common answers - yes, the filters before the pump are coarse at 100+ microns, as pumps suck at suction, so flow blockage is reduced, cavitation is avoided, while flow is maintained. Yes, 30 micron is plenty fine for carbs with their large float needles/valves and low pressures. Finer simply clogs-up quicker with little benefit.

EFI injectors are very sensitive to particles with their very tight tolerances for precision flow, and they even have their own 4th-level micro-filters right in each injector. The 10µ filter prevents loading of the injector filters, as they are more difficult to clean or replace. Hope that helps.

Curious....would the stock 65 fuel pump with the built in fuel filter be enough to feed a Weber setup?

The fuel pump is sized to feed the engine demands, not the type of carb or injection. A 300hp engine requires fuel flow for 300hp at the required pressure, regardless of the fuel delivery method.

 

[zray]

Curious....would the stock 65 fuel pump with the built in fuel filter be enough to feed a Weber setup? @zray ?

it is, even at full throttle mile after mile. And that’s with the stock 5/16” lines.

I was all ready to put in 3/8” lines, etc, but it wasn’t needed.

Z

 

[LeeFred]

it is, even at full throttle mile after mile. And that’s with the stock 5/16” lines.

I was all ready to put in 3/8” lines, etc, but it wasn’t needed

So we can advise @BlackStick to change out his fuel pump to the Carter M4009 with the integrated fuel filter for his Weber setup and call it good? Just might have to do a bit of modification to the pump itself to accept the AN fitting (which I have done on my car).

 

[zray]

So we can advise @BlackStick to change out his fuel pump to the Carter M4009 with the integrated fuel filter for his Weber setup and call it good? Just might have to do a bit of modification to the pump itself to accept the AN fitting (which I have done on my car).

it worked very well for me.

Z

 

[Woodchuck]

I'd use an in-line filter at the regulator inlet and a hard line to the pump, but that's just me....

 

[GradyStang]

I put one of these fuel filters between the fuel pump and the carburetor, used some Earl's brand fuel line as well as their AN fuel fittings. Worked out well for me.

Holley 162-562 100 GPH HP Billet Fuel Filter

Holley's new HP Billet Fuel Filters are part of the complete HP Fuel Systems product line. HP Billet fuel filters are precision CNC machined from 6061-T6 billet aluminum for strength and durability. They feature a black bright dip anodized body and clear bright dip anodized ends for superior...

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