[94_turbo]

has anyone!! converted the obs,,from the mechanical pump,,to the newer elec one??? how,,and whats involved??? thanks,

 

[DaveBey]

Generally speaking, when upgrading from the stock mechanical fuel pump to an electric fuel pump, you're also replacing the stock fuel filter/water separator. Soooo, you're actually upgrading/replacing two things. There are several different ways to accomplish the upgrade, it just depends what you want.

Replacing the fuel pump is the basic part. You're removing the stock mechanical fuel pump, plugging the hole in the block for the pump piston, and adding an electric fuel pump. The electric fuel pump of choice is generally a Super Duty 7.3L pump mounted on the frame rail.

Replacing the fuel filter/water separator is the 'hard part.' In most of the commercially available kits, the filter/separator is moved to the frame rail by the fuel pump. You can also go with a pre- and post-pump fuel filter. At the minimum, you need a post-pump filter. You can also use the fuel filter/water separator off a Super Duty 7.3L. Either option will also require a fuel pressure regulator. FueLab makes a great one. You'll also need to plumb everything in and this involves running new fuel lines, generally from the new electric fuel pump.

Do a search and you'll come up with a boatload of information on the various setups. The above is just a general overview.

Cheers from Claremore, OK!
Dave

 

[94_turbo]

Generally speaking, when upgrading from the stock mechanical fuel pump to an electric fuel pump, you're also replacing the stock fuel filter/water separator. Soooo, you're actually upgrading/replacing two things. There are several different ways to accomplish the upgrade, it just depends what you want.

Replacing the fuel pump is the basic part. You're removing the stock mechanical fuel pump, plugging the hole in the block for the pump piston, and adding an electric fuel pump. The electric fuel pump of choice is generally a Super Duty 7.3L pump mounted on the frame rail.

Replacing the fuel filter/water separator is the 'hard part.' In most of the commercially available kits, the filter/separator is moved to the frame rail by the fuel pump. You can also go with a pre- and post-pump fuel filter. At the minimum, you need a post-pump filter. You can also use the fuel filter/water separator off a Super Duty 7.3L. Either option will also require a fuel pressure regulator. FueLab makes a great one. You'll also need to plumb everything in and this involves running new fuel lines, generally from the new electric fuel pump.

Do a search and you'll come up with a boatload of information on the various setups. The above is just a general overview.

Cheers from Claremore, OK!
Dave

what i need to know,,is theres three inputs on the mechnical pump..fuel in,at top,,return,,at top,,and what is the line on the bottom of the pump??? if i could find the flow pattern,,and what the bottom one does,,no problem..thanks Dave..94

 

[DaveBey]

At the top you have the inlet from the fuel tanks and outlet to the fuel filter/water separator (low pressure). The bottom is the inlet from the fuel filter/water separator to the high pressure stage of the fuel pump.

Cheers from Claremore, OK!
Dave

 

[94_turbo]

At the top you have the inlet from the fuel tanks and outlet to the fuel filter/water separator (low pressure). The bottom is the inlet from the fuel filter/water separator to the high pressure stage of the fuel pump.

Cheers from Claremore, OK!
Dave

ahhhhhhhh!!!!!!!!! thanks,94

 

[Cratos]

the 3/8 line to the top of the pump is your feed from the tanks the 5/16 from the reg on the filter bowl is the return to the tanks are the only to you use . the other from the filter to the pump is just boosting the pressure from the second stage of the pump .

 

[OldRedFord]

Could this conversion be done for less then $400?

 

[DaveBey]

Cost all depends on materials and how complicated you make it. Your fabrication skills (or, in my case, lackthereof) may also affect cost.

The electric fuel pump, filtration, and fuel pressure regulator are generally the expensive parts. Hose and fittings can add up as well though...

 

[94_turbo]

im wanting to pull the mech pump out,,and place the elec right in the same spot!! wvo is hell on mech pump diaphrams!!!!!!!!!!!!!!!!