Duel Feeding P pump

Some more pics for those that need them... return line isn't finished in the pic but you get the idea...

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Nice red engine and still got the beige starter. Come on! Paint it all!
 
Man you are going to be ornery when you start leaking black smoke and oil all over that purdy motor..... Looks nice.
 
Fuel inlet in the stock position is an M14 x 1.5, the front one is a M18 x 1.5.

Jim
 
jim, any other mods needed or can i just make a "y" and take the plug out in the front and run my second line into it.

-Danny
 
That's about it, I still run the stock helicoils' and run (2) -6 lines....there is a reason, if you are running a stand alone pump to both -8's would be better but the nut is going to be close to the assy case.....FYI!

Jim
 
Man you are going to be ornery when you start leaking black smoke and oil all over that purdy motor..... Looks nice.

I'm not even sure why I went thru the effort of making it look nice, I'm sure I'll get it all covered with dirt/mud before the oil even gets on it...

zstroken, I had to draw the line somewhere... and I came to my senses and realized I was installing this purdy engine in a beat up, scratched up, starting to rust two tone 2nd gen truck. LOL

FYI, lines above are -8AN to a Y into one -10 line. Pump inlet sizes are as Jim pointed out...
 
So does that blue banjo fitting on the back of the pump run over to the fuel pressure regulator and then return to the tank?

im glad you are doing this first...hopefully you have kept all your part numbers so i can come back and bug you this fall/winter
 
Yes, that's the return fuel flow to the fuel regulator. You could just use a normal overflow valve and skip the regulator, but then your lift pump has to maintain 45 psi (or whatever it's set at) all the time. I figured my FASS 200 gph pump may last a bit longer if I let it run at say 25 psi under no boost conditions. The fuel regulator has a 1:1 boost rise, so at 20 psi, it will restrict enough fuel to provide 45 psi at the injection pump. These numbers are out of the air as I haven't looked into what pressures to run yet... I think around 45-50 max should be good. Not sure about the no boost conditions, don't think it's too critical. Probably go with 25 or so...

And yes I'm keeping track of all the part numbers... and lots of pics...
 
That is my exact setup, and the same reasoning, I can't get mine below 30 psi though. That is the lowest my regulator will go. I haven't changed the spring in the fass yet to get it above 45psi.
 
Fuel inlet in the stock position is an M14 x 1.5, the front one is a M18 x 1.5.

Jim

And if you pull the helicoils out, they are M16 x 1.5...I run a -8 inlet with the helicoil removed, and the stock return through a regulator like shown here. Works pretty darn good for me!


On the little trucks engine I might feed through the inlet and OF ports, and return from the front port...I've had a couple people tell me that is a little better for flow. Something about port design, but I honestly don't think it should mater!
Chris
 
I can't take full credit, Fulmer steered me in the direction. What spring do you have in your FASS??
 
That is mine, I have a different spring somewhere, just got to find it.
 
And if you pull the helicoils out, they are M16 x 1.5...I run a -8 inlet with the helicoil removed, and the stock return through a regulator like shown here. Works pretty darn good for me!


On the little trucks engine I might feed through the inlet and OF ports, and return from the front port...I've had a couple people tell me that is a little better for flow. Something about port design, but I honestly don't think it should mater!
Chris


more flow because its 18mm. I wonder if i need a regulator on mine?

I can suck my raptor down to 25psi (when set at 45) at WOT for the first 5-8 seconds. It slowly rises to 35psi which is a better PSI. Im about to throw a knarly pump on it so its only gunna suck more fuel. thoughts? feeding it from the front of the pump isnt a bad idea....i stretch the overflow valve what else to keep internal pump PSI up??
 
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