Where to put the fuel filter?

roachie

roachie

Taco Master
Joined
Nov 2, 2007
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Using and belt driven type fuel pump, not to sure on where to put the filter. Suction side or pressure side?

Also, would it be safe to for the fuel return for the head and injection pump to share with the 3way "oh chit" valve? Or should the valve have a line dedicated to it.

Pressure side is to be all -10 and return a -8.

Thoughts?

Fuelsystem.jpg
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I have a belt driven pump to and im filtering after the pump because i use some crazy steel woven, with fabric woven over it hydraulic line from my cell to my pump and its almost impossible to work with since put on. So i have filter after pump befor bypass reg and ip. On the returns i dont know what the return pressure is off the head and injectors but i just ran a seperate line and have 2 returns into the cell.
 
I need to figure out a damn pressure regulator.

Any ideas on that one?
 
I'm not too experienced here, but wouldn't before the pump be better since it will clean the fuel before it gets into the pump? At least reducing wear on the pump caused by debris... On your diaghram, where were you thinking? Wherever is easiest to access the filter in the pressure line would be my reccomendation. Thoughts?
 
You want your filter after the belt driven pump, so if it starts puking any steel your catching it before it gets to the injection pump.

Myself I like a primary filter before the lift pump.

Near any ag stores? Spraying systems sell a really nice brass adjustable pressure regulator, think it was like $35.
 
I'm worried about the filter making the pump work to hard trying to suck through it. It already has to pull fuel through 15' of hose. I can locate the filter anywhere.

Im not sure about a pressure regulator style or location either.
 
vulcan performance has a presure regulator that you might want to look into. I would run a inline screen before the pump to catch all of the big stuff and a finer filter before the injection pump. have you look into a gear drive or a cam drivin pump insted of the belt, I am asumming that it is for your ford.
 
Help me push said:
I'm worried about the filter making the pump work to hard trying to suck through it. It already has to pull fuel through 15' of hose. I can locate the filter anywhere.

Im not sure about a pressure regulator style or location either.
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Exactly. You want to use a massive suction line and a loose filter (AD and FASS both use ones in the 150 micron range) before the pump to avoid cavitation.

After the pump use a nice and tight filter. Pumps push much better than they pull so restriction on the pressure side is not near as hard on the pump as on the suction side.

The regulator can go on the pressure or return side of the IP. If you put it on the pressure side make sure to have an orifice on the outlet of the IP to keep fuel flowing through it to keep it cool. Or just put the regulator on the return side of the IP.


IIRC Josh (aka: teddybear) has been using an regulator off of ebay for a few years with great success.
 
I cant find a -10 inlet/outlet regulator? Max psi is 20.

Anyone else see one I don't?

Im guessing a 100 micron pre-pump and a 10 micron after should do it. If the pressure line is -10 should the suction line be a -12?
 
Help me push said:
I cant find a -10 inlet/outlet regulator? Max psi is 20.

Anyone else see one I don't?

Im guessing a 100 micron pre-pump and a 10 micron after should do it. If the pressure line is -10 should the suction line be a -12?
Click to expand...

Go with 2 micron after...why not? You won't be running it that much, and flow still won't be an issue.

Aeromotive should make a regulator like you need...I thought anyway...

Chris
 
All areomotive stuff is the wrong size unless you get a boost reference or a 4 port deal.

Still looking for a finer filter.
 
Help me push said:
All areomotive stuff is the wrong size unless you get a boost reference or a 4 port deal.

Still looking for a finer filter.
Click to expand...

Why not get a boost referenced one, and not use the boost reference? If the fitting size is all thats holding you back anyway!


What filter base do you have, or what filter are you running now? I can try and help dig up a 2 micron filter if you want!
Chris
 
Aeromotive 13101 has -10 in/outlets and -6AN return. 13301 has 3/8"NPT ports. 13113 and 13110 hav a -10AN return but both are $$$

I run a 13105 but it only has 6AN ports. I've seen it used on a few other trucks too with no problems.

The bypass ports just take a 1/16"NPT plug to block off.

x2 on using a 2 or 3 micron filter
 
Nothing on filter bases at the moment. I have a black piece of paper in front of me. I do have a stock 94 fuel filter assy though.


Thanks for the links. The minimum pressures on those are 10 psi above what I can run though. :bang
 
What pump is it for? I guess I just jumped to p-pump :doh:

Maybe look at Carburated regulators then, not the EFI stuff P-pump guys use

What about a 1312-A2000?
 
Help me push said:
Nothing on filter bases at the moment. I have a black piece of paper in front of me. I do have a stock 94 fuel filter assy though.


Thanks for the links. The minimum pressures on those are 10 psi above what I can run though. :bang
Click to expand...

Oh yeah, you are going VP again, aren't you...


If you have a blank sheet of paper, I guess I can search for my username and "filter base" and find you the part number of the base and 2 micron filters I run...I suppose I could do that for you;)

Here you go slacker

Chris
 
JFlagg said:
I'm not too experienced here, but wouldn't before the pump be better since it will clean the fuel before it gets into the pump? At least reducing wear on the pump caused by debris... On your diaghram, where were you thinking? Wherever is easiest to access the filter in the pressure line would be my reccomendation. Thoughts?
Click to expand...

Most, if not all of the fuel pump manufacturers recommend some sort of coarse screen type filter before the lift pump. That way you're not pulling trash through the pump, yet there isn't the restriction of having a fine filter there either. Look at a typical stock EFI setup. They're using the sock on the end of the pump as this filter. Manufacturers also usually recommend a fine filter after the pump. That way it gets a good filtering before heading into the injection pump.

Look at the old 12 valve trucks for a second. They have the fuel heater/screen first, then the lift pump, followed by the main fuel filter. Any system I would build would be set up in a similar fashion.
 
sorry to de-rail, but the fittings on that aeromotive 13105..... can they be taken out and say swapped for a -4 x 3/8" npt or what have you ? instead of the -6 x ? (for my injector return)
 
Kronic_187 said:
sorry to de-rail, but the fittings on that aeromotive 13105..... can they be taken out and say swapped for a -4 x 3/8" npt or what have you ? instead of the -6 x ? (for my injector return)
Click to expand...

Yes. The ports tapped into the regulator itself are straight cut 6AN o-ring ports. So any male 3/8 or #6 ORB adapter will screw in.

Although, after using AN fittings I don't know why anyone would want anything else :rockwoot:
 
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