IDI E Fuel pump Info

[franklin2]

The vacuum/boost connection is a pressure reference point. it adjusts the pressure according to boost. Should you run that on the turbocharged diesel, I do not know.

For example, if you set the above regulator to feed a carb that is downstream of a turbo, and the carb requires 5psi, you set it up for 5 psi at idle, everything is ok. But once you start making boost and the carb is in the boost environment, if you run 5psi of boost, your fuel pressure will be effectively 0 psi. it was set at 5psi with no boost, but it has to work against any pressure provided by the turbo. So you can put a hose on that port, and as the boost increases, it always keeps the fuel pressure 5psi above the boost pressure. For instance, if you run 5psi fuel pressure, at 5 psi boost the fuel regulator would actually be pushing 10 psi with that boost port hooked to the intake manifold.

 

[franklin2]

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[IDIBRONCO]

Thinking on placing a Epump and fuel regulator on my '83 6.9L 2wd - with this comment of using a Bypass regulator and the return NOT going back to the injector fuel lines - would it be best to run the return straight back to the tank sump and the injector lines kept to the factory returns back through top sending unit of the tank?

That set up doesn't sound like it needs a bypass regulator. In your case, I wouldn't bother with one. If/when I use a bypass regulator, I will run the regulator return straight back to the tank, possibly through the filler neck.
People have T'd into the engine return lines and not had any problems. My feeling is that it could cause issues. If you have too much pressure in your return lines, the engine won't run. I like to play it safe here. I have no kind of proof that there will be any issues, just a gut feeling. To me, this is eliminating a possible problem area. Of course, I'm running a non bypass regulator right now so I have a 0% chance of any issues with my return system and I don't have to route any return lines either.

 

[Mike Gallegos]

That set up doesn't sound like it needs a bypass regulator. In your case, I wouldn't bother with one. If/when I use a bypass regulator, I will run the regulator return straight back to the tank, possibly through the filler neck.
People have T'd into the engine return lines and not had any problems. My feeling is that it could cause issues. If you have too much pressure in your return lines, the engine won't run. I like to play it safe here. I have no kind of proof that there will be any issues, just a gut feeling. To me, this is eliminating a possible problem area. Of course, I'm running a non bypass regulator right now so I have a 0% chance of any issues with my return system and I don't have to route any return lines either.

Tanks! will follow this direction

 

[Mike Gallegos]

Tanks! will follow this direction

I have gathered all my fuel components including a new gas tank. Ready to install and in set up I noticed I can place the fuel regulator straight into the filter head , followed by pressure gauge and then into IP....but the regulator will be horizontally place with adjustment screw towards the fire wall - any one have a comment as to if this being a problem with the regulator fucntion??? does it have to be stright up (adjustment screw upwards) to be best?

Holley regulator 12-803 4.5 to 9psi

 

[Clb]

Picture of the setup?

 

[IDIBRONCO]

You might have issues with too much vibration by doing that. The vibrations may end up breaking the regulator. I don't know either way, but it's a possibility.

 

[Mike Gallegos]

You must be registered for see images attach

 

[Mike Gallegos]

You must be registered for see images attach

PIC of the set up from inline fuel from Epump through filter
/housing, out to reg, to pressure gauge and onto the line to IP - did not think about the VIBRA! Would it be best to get a 90deg fitting to point the reg vertical? or still to much VIBRA?