EFI Fuel Pump & Accumulator

[rcmbronc]

Looking to plumb my EFI fuel system. I have a mechanical pump on the motor now and was planning on running the mechanical and using it to pump into the accumulator. Then the high pressure pump from there to the motor. Would this be OK or do you recommend just mounting the high pressure pump back by the tank and eliminate the other pump and accumulator. I also am looking for some suggestions on mounting locations for the accumulator. I want to mount it in the front of the truck. I have no inner fenders so not sure where to put it and the pump. Anyone have any suggestions or pictures?

 

[bmc69]

Can't help you with the mounting issue..because mine is mounted on the inner fenderwall. But mine is plumbed and operating exactly like you described and has provided trouble-free operation for 4 years and counting. I'm using the modified spin-on filter type of accumulator.

 

[trailpsycho]

I could never find a 'good place' for mine. inside the front fender was probably among the better spots. In the end, I left it out and plumbed the system without it. I figure I have it, if I end up needing it.

 

[BroncoDawg]

Two schools of thought on this. Accumulators came into use because some had problems with fuel pickup in stock tanks when on an incline. A guy who does efi into early mustangs designed a system fo me that is simple and works well w/ no accumulator.

High pressure pump mounted near the tank pushes to the fuel rails. High pressure pushes well, but does not pull well. Mounted low pressure pump, that I had already bought before talking to him, on the frame just behind auxilary tank and it transfers fuel to the main tank when needed so no tank switch necessary. Tapped into the fuel filler neck on main tank for transfer line.
Have deliberately run main tank way low and it still picks up on the road, but I do keep main tank above 1/4 full on the trail for off camber fuel pick up. My 77 tank may be different than earlier years and could be why no pick up problems, if anybody knows about this chime in.
Accumulator setups work fine and if you want that extra level of security, go for it, I justed opted to keep it simple and it has worked well for over 6 years now.
Good luck,
Greg

 

[bronko69er]

Looking to plumb my EFI fuel system. I have a mechanical pump on the motor now and was planning on running the mechanical and using it to pump into the accumulator. Then the high pressure pump from there to the motor. Would this be OK or do you recommend just mounting the high pressure pump back by the tank and eliminate the other pump and accumulator. I also am looking for some suggestions on mounting locations for the accumulator. I want to mount it in the front of the truck. I have no inner fenders so not sure where to put it and the pump. Anyone have any suggestions or pictures?

That is the way I'll be doing it.
In the process right now.....
http://www.classicbroncos.com/forums/showthread.php?t=104144

 

[eb66to77]

This is how mine is setup even though I haven't gone EFI yet. http://bcbroncos.com/fuelsystem.pdf

 

[rcmbronc]

This is how I am going to try it.

 

[Recko555]

Should be out of the way.

 

[lonesouth]

When I get to it, gonna try the saddleup method of one high pressure E2000 from a 80's/90's f250 mounted on the frame under the driver. He claimed it never gave him a problem and that is how Ford implemented it on those trucks.

 

[vertex]

I am only running one high pressure pump on my conversion. I have about 600 miles total with some trail runs and street driving both summer and winter. I mounted the pump back by the tank close to the bottom and it works great. The only draw back is that you have to use more high pressure line but you will save money by not using the accumulator and second pump.

 

[rcmbronc]

I was going to try the one pump also, but just decided to try this first. If this gives me troubles, then I will change it.

 

[flousberg]

I ran the one pump, but when it was hot or high altitude it vapor locked and would die. I put the pump inside the tank and haven't had any issue.