Will a stock In-tank Pump Work in line with a High Performance Pump?

[NaughtyPonyGirl]

I have a few Questions about my fuel system ,I have a 600 Holley dp ;
1. Is it OK for me to run the stock EFI pump through my Holley InLine with a regulator at the carb??
2.Do I have to remove my InTank Pump in order to run my Holley system??
3.Does the fuel line from the rear of the car need to be larger???
My problem is that my New Holley electric pump isnt happy unless assisted by the stock tank unit , the fuel is regulated down to 7psi and works fine together, or with the stock pump alone, But the Holley wont run it on its own?? If ttogether is fine I will keep it , as it is I have swithes to both so I can turn them on and off at my own choice !!

Any suggestions Fellas!! Thanx NPG

[claypike]

I have heard of people putting regulators on there efi pump, I dont think it is a good idea because your making that pump work extra hard. Im running new line,pump, and regulator cause I am also convertying to a carb setup.
remember a carb only requires 6psi of fuel pressure opposed to the 35-50psi for efi.( dont quote me on those numbers lol)
Im buying this electric fuel pump kit from jegs, It seems to be all Ill need.
JEGS Fuel Pump & Regulator Install Kit 555-100804

[Pro SC]

Shar,
i am no expert on this type of setup as i have not dealt with carbs in over 20 years but i don't believe the fuel pump will work any harder as it is a return style system, the fuel regualtor on an efi system works the same way. The pump is running and any excess fuel is simply returned to the fuel tank. The setup you have should work just fine although i don't understand the need for the second pump as long as you have the pressure down to whats required for your carb and the excess is returned to your tank, you should be good to go. I guess it depends on the regulator you have with your kit, does it return the excess fuel to the return line into the tank? At one car show i attended last summer a guy had a carbed 302 in a ranger pick up and thats how his set up worked using the stock in tank fuel pump.

[Merc460]

How close to the tank is your holley pump?

[claypike]

If you restrict flow through the efi pump by regulating it to 6psi from 50 or so psi it makes it work harder does it not? thats the way I see it and have been told this from others who have done the swap. I am removing my in tank pump and using a electric pump setup with a carb specific pickup in the tank for my sn95.

[Pro SC]

Like i said Claypike i am no expert on this kind of a set up, but i was asking this guy about it on his Ranger last summer and he had a regulator that allowed him to use his return line to let the excess fuel return to the tank. If that is indeed how it works it should not be making the pump work any harder as the pump always flows at a constant speed and excess fuel is simply returned to the tank just like the efi set up, except of course it is down to 6 psi. It is not like you are restricting the flow or anything it just lets you dump any excess back to the tank. The regulator was huge, almost looked like an air pressure one but it did indeed return the excess fuel to the tank. I only talked to him about it for a couple of minutes, so i am not sure who made it but i thought it was pretty cool and a nice easy way to convert to a carb set up.

[claypike]

sorry if i came off as a jerk.lol didnt mean to.
I am just learnig about it too, so the stock pump will return the same amount while the regulator sets it to 6psi to the carb?

[Tyler-96SVT]

When I had an 87' (back in 94' or so, yep gettin old) I ran a 351w with a 700dp on it. From what I remember this is what I did,
- take the pump out of the tank,
- removed the pump from the housing
- run a piece of fuel hose from the top of the housing connected to the fuel line to the bottom where the screen is so it will suck fuel from the bottom of the tank.
- reinstalled the housing in the tank.
- place the holley as close to the tank as possible and run a regulator if needed at the front of the car.
- Cap off the return line as it is not needed for your application.

Hope this helps.

Tyler

[Pro SC]

Originally Posted by claypike

sorry if i came off as a jerk.lol didnt mean to.
I am just learnig about it too, so the stock pump will return the same amount while the regulator sets it to 6psi to the carb?

No worries Friend, you didn't and i hope i didn't either, i just enjoy discussing tech like this with others as we all learn about different idea's that other people use. To me the whole point of discussing topics like this, is not being on any kind of stupid ego trip. It is to learn tricks to help us all out in order to save money and go faster. I am the first person who will listen and take notes if it will save me a buck. Thats what i love about this hobby, we all have the same goal, get the best bang for the buck for our mods and to share ideas and experiences. It should never be about who is right or who is wrong. It should be a way to share ideas and come up with a solution. I have no problem leaving my ego at the door when it comes to learning from others. In the same breath i have no problem telling others what i think. To me life is to short to act like a dumb ass kid and pound on my chest and let my ego swell, thinking i am right and you are wrong. I am way beyond that in life, it is just a way to share ideas, nothing more nothing less. Now if i smoke your sorry ass at the track, well thats a different story!
Cheers..
Crap after all that i just realized i didn't answer your question! Don't mind me i blab on way to much!! Yes that what the guy was telling me, he said he had done a few builds like this and the regulator used the return line to dump the excess fuel back to the tank and it also regulated the fuel pressure down to 6 psi for the carb, i thought it was a pretty cool set up.
Mark

[Arbour88]

Originally Posted by Pro SC

No worries Friend, you didn't and i hope i didn't either, i just enjoy discussing tech like this with others as we all learn about different idea's that other people use. To me the whole point of discussing topics like this, is not being on any kind of stupid ego trip. It is to learn tricks to help us all out in order to save money and go faster. I am the first person who will listen and take notes if it will save me a buck. Thats what i love about this hobby, we all have the same goal, get the best bang for the buck for our mods and to share ideas and experiences. It should never be about who is right or who is wrong. It should be a way to share ideas and come up with a solution. I have no problem leaving my ego at the door when it comes to learning from others. In the same breath i have no problem telling others what i think. To me life is to short to act like a dumb ass kid and pound on my chest and let my ego swell, thinking i am right and you are wrong. I am way beyond that in life, it is just a way to share ideas, nothing more nothing less. Now if i smoke your sorry ass at the track, well thats a different story!
Cheers..

Well said Pro SC.

John