Wheres waldo? umm.. I mean the regulator.

[carcrafter22]

I am making the fuel system for my 3.9L diesel project and have a few questions from you experts.

My setup

Mallory Comp 250 fuel pump Mallory 5250 - Mallory Comp Series Electric Fuel Pumps Pump is capable of 20psi 250gph -8 ports

Aeromotive regulator 13301 Aeromotive Inc. - High-Performance Fuel Systems Fuel Pumps 1 inlet, 3 outlets,1 return all 3/8" NPT with -8 fittings.

1/2" fuel line

Pump will be a sheid built A pump approximately 370cc.


I have never seen anyone run one of these Mallory electric fuel pumps but I got it for way too cheap to pass up and if it doesnt work then I am not out more than a tank of fuel really.


How do these setups look to you guys? Which one would you choose?

How and where would you install the regulator, I have done alot of searching on it and the popular opinion seems to be after the pump. Any special tips I should know about?




Pleas pic the best one for my situation and let me know why you chose it.

Thanks
Randy

 

[JOESHTRDDSL]

I think you need to regulate the inlet pressure of the injection pump. If the pump will handle 20psi inlet pressure, then let the injection pump handle the regulation of fuel it needs and don't use the regulator at all.

Joe

 

[carcrafter22]

True, I could just run a line from the bypass on the pump to the tank and forget the regulator.

I do plan on installing a better suited pump later on when funds allow. I know when I install the different pump I will need a regulator to get to the 25-30psi Sheids recomends for my pump so I would like to get it all installed now.

 

[JamieWood]

Correct me if I'm wrong. But, if you were to regulate it before the pump your not achieving anything. Its basically just regulating the the fuel in the lines. Your fuel pressure at the IP would be next to nothing if not 0.

 

[carcrafter22]

No clue never tested it. I am leaning more towards pic #2. I have until thursday when my parts get here to decide. Do post up your opinions everyone.

 

[CL2000]

#2 that is how im about to set up my pump

 

[DTanklage]

whats inside your inj pump?

if its like a ve you have to plumb like #1

if its like a p-pump you can do #2

 

[joefarmer]

Unless the A-pump has an internal regulator, you will need to plumb a regulator after the A-pump to keep pressure internally in the injection pump. AKA drawing #2.

 

[Signature600]

Unless the A-pump has an internal regulator, you will need to plumb a regulator after the A-pump to keep pressure internally in the injection pump. AKA drawing #2.

Correct...that's the best way with a inline pump.

Chris

 

[carcrafter22]

#2 it is. Thanks for the input everyone.