Glad you guys know about this.
I was speculating, I have no clue how the system works except that oil pushes the fuel.

 

wow, i just got really confused for a second.. i read it 3 times tho, i'm starting to figure it out.. LoL.

 

I'm still trying to figure out why there are 2 holes.

 

i'm still trying to figure out why there arent more!! LoL. my guess is you have 3000 psi of oil trying to go through such a small hole. not going to happen, but makes it easier to get that oil in the injector with more holes. thats what i gather from it. guess thats why jim said they put more holes in there or make those bigger when they use really big injectors

 

Maybe I wasn't clear enough. All A codes have ONE hole on the left side, 9:00 position, right where the main oil supply from the head is. The AO has the second hole 90* from that at 12:00, AA, AB and AD have the second hole 180* from that at 3:00.

You'd know what we're talking about if you had an injector in yoru hand.
William should know in a day or 2.

 

I understand where they are on the injectors.
What I am missing is what goes on in the head on the engine and how the oil channels work in there.

I'm guessing oil flows in one, and out the other to the next injector.

or what is the 2nd hole for?
Obviously it comes in at 9. So where does the other hole take the oil?

 

I understand where they are on the injectors.
What I am missing is what goes on in the head on the engine and how the oil channels work in there.

I'm guessing oil flows in one, and out the other to the next injector.

or what is the 2nd hole for?
Obviously it comes in at 9. So where does the other hole take the oil?

 

Hey Talyn, stop padding up your post count with double posts.

 

I dont do it on purpose!
i click send once, I duno what the deal is.

 

Picture the oil rail in the head like a pipe running front to back. Then, put ports in the pipe coming out the side. 4 of them to feed each injector. With the injector installed in the head, there is a chamber (the notch in the middle of the injector where you will find the 2 supply holes) and the HPOil port in the head is right at this chamber/notch. It's in this chamber that the holes are 180* apart that I am referring to. Oil goes in BOTH holes into another 'chamber' in the injector just below the Poppet Valve. When the solenoid energizes it lifts the Poppet valve up off the lower seat and into it's upper seat, allowing that oil to then go upwards, make a 180* internal turn into another passage down to push the Intensifier Piston, which pushes the Plunger, which pushes the fuel out.

Once the 'pushing of the fuel' is complete and the solenoid de-energizes, the Poppet valve rests back down exposing the upper port, and the oil that filled the Piston chamber to push it down, then is pushed back up through the passage (by the Plunger Spring) and is exhausted through the port and alum spout on the injector and goes back to the crankcase via the valve cover area.

Simple, huh?


This is precisely why it is so difficult to make lots of power with this type of fuel injection system.
Leave it to Ford to find the most complicated injector designed by man to put in their trucks...

Look at the pic below:



The Purple channels are the oil passages, the one on the left goes from the Poppet Valve to the Piston. The angled one on the right has an identical hole 180* away, leads from head supply to chamber below Poppet. The 2 Purple channels are 90* apart, but FWIW the channel shown on the left is actually 180* from where it should be. They put the injector together 'wrong' to show you the passages and other features.

 

Just a WAG here, but maybe the holes are spaced at 180* so that you don't have oil sitting on on side of the injector forever, turning into sludge and whatnot.

 

Talyn, just kidding, I like to give people a hard time. Happens to me once in a while.

 

you were giving me a hard time?

 

Not in a mean way, just joking.

 

You were joking?