electric fuel pumps

[BigPinoyHunk]

I have no idea how I missed this thread the first time. So is that the GP 22 gal sump tank? I was originally going to make something like that with a Competition Engineering or similar weld in sump to feed a sx1000 pump and filter I picked up years ago. I'm glad i didn't because I've learned a lot since. Does that tank have the breather on top? If so just make a new plate and incorporate the return near the breather. You can divert the direction of the returned fuel with a hard line. You should be able to find some hard line (same metal type obviously) that will fit snugly into the AN fitting that will be welded in and tack it in place. Just put a little bend in the hard line to divert it away from the sump. You could always do the same thing in its current location (after tanking and flashing off any fumes of course).

I wanted to go in tank so the pumps live longer and mine will be injected so I'm going to redo the top of the tank to accept this: http://www.lethalperformance.com/03-04-svt-cobra/fuel-delivery/divisionx-fuel-hat-manifolds/divisionx-sn95-dual-return-style-fuel-hat-manifold.html

so I can utilize -10 feed and -8 return.

Where do you run your car? I only have Irwindale's 1/8 mile close by.

the top of tank where the breather is a no, because its not accessible when the tank is installed. i'll leave that as a vent. i think i'll just have it drilled and gapped for another -8 return line.

i run at sacramento. and the tank is a stock tank with a 1 gallon sump so its a 21 gallon tank and i never put more than 10 gallons in anyways.

 

[Blueoval71]

OOOF! That's about 300 or so miles from Oxnard isn't it? Man I wish L.A.C.R. was still open.

 

[Mister 4x4]

Here's what I finally came up with. I'm still working on getting a 90-degree elbow so I can run the fuel line over the top of the bump-stop, instead of under, as it is in the picture.

BTW - nobody really ever answered my questions on page 1. Just sayin'

 

[BigPinoyHunk]

OOOF! That's about 300 or so miles from Oxnard isn't it? Man I wish L.A.C.R. was still open.

oxnard is my hometown and i am stationed near sacramento california actually.

Here's what I finally came up with. I'm still working on getting a 90-degree elbow so I can run the fuel line over the top of the bump-stop, instead of under, as it is in the picture.

BTW - nobody really ever answered my questions on page 1. Just sayin'

mister 4x4, how is that suction line working for you? coming out of the pick-up tube, it haves to travel up and then to your pump. it looks like once you start getting low on fuel your pump might start having problems getting fuel.

i am in the same boat with my fuel pump, its between the diff and tank. i want to wrap the hose around the tank and be out of the way instead of going straight back.

With consideration that the manual pump (hanging off the engine) is able to suck fuel without being lower than the tank (because the sending unit location is the real deal here), why is it such a paramount to have an electric pump lower than the tank? A fuel pump is a fuel pump, after all - and if it sucks gas through the sending unit (and pre-filter 'sock,' etc.), why would electric be any different than a manual (from the tank's perspective)?

Another question: is putting a nipple at the absolute bottom of the tank really a good idea? What about sediment and other things that would collect in the bottom - are you sure you want that stuff getting sucked into the fuel pump directly?

The sending unit is designed the way it is for a reason, and seems to work just fine with manual pumps hanging off the engine... why would switching to an electric pump be so different - other than keeping it 'primed' before starting so it doesn't burn out prematurely?

I hope these aren't stupid questions - I honestly can't see the difference here. Of course, I haven't actually started researching this, either. So if anybody can offer answers, it would be greatly appreciated.

they say a mechanical pump is a good sucking pump and electric pumps are good pushers. however, when i went mechanical only, i had problems running at the track running low fuel. when the pump is close/bottomish to the tank, all that fuel will just gravity to the pump.

however, i've heard of Aermotive A1000 pumps sucking fuel and pumping it. there are some dirty sites that will descripe it as sucking fuel as hard as a detroit hooker would a carrot.

 

[Mister 4x4]

I have no idea how well my pump set-up works, as I still haven't fired it up yet. (Soon, hopefully)

I do hafta wonder how reliable the info on electric vs. mechanical really is, because I know the fuel pump in my Ram is on top of the tank and never has issues with fuel delivery no matter what the fuel level. My old Nissan 4x4s had similar set-ups to the one I just pictured, except that the pump was on the frame closer to the engine (right below the passenger side of the back of the cab, actually) - never had issues.

With regard to the pick-up in the tank: since it is located in the bottom of the tank itself, would it really matter where the pump is located as long as the pick-up doesn't break suction (i.e., the only way it would get starved for fuel is if the fuel level is so low the pick-up is left sucking air).

I'm no expert, that's why I asked. All I know is what makes sense to me, and I'm happy to learn something new - even if it turns out I had it wrong all along.

 

[gpierce]

Hi guys. When I bought my car it had an electric pump installed inline with the factory pump, mounted near the tank. It picks up the factory tube and pushes through the factory pump. Would have thought the diaphram in the factory pump would get damaged that way, but it seems to be fine as is it does run OK with just the factory pump. I have a switch to turn the electric pump on when I want to. It's excellent for priming the system when its been sitting a while.

Pressure was kind of all over the place at the carb so I put in an adjustable fuel pressure regulator. Purrs like a kitten, or rather Bengal Tiger on steroids

Greg

 

[eddyw]

Hi,

Do you have filters installed between the tank and fuel pump, maybe after the fuel pump?

Currently have purchased this kit to use later ... when I go to assemble the Mustang.

eddy

 

[gpierce]

If that question is to me, the only filter I have is the one between the mechanical pump and the carb. I do not have a filter before or after the electric pump.

 

[BigPinoyHunk]

i hear you should put a filter between tank and pump to prevent pump to get gummed up. however, if you are using the pick up tube, then you are using the sock in the tank as your initial filter.


i may be thinking a 10 gallon fuel cell and an aermotive a1000 might in the making. and they are suppose to be able to supply a natural aspirated motor up to 1500. pump should be good enough to feed motor and nitrous system.

 

[eddyw]

Hi everyone,

This is the schedule of Holley ...

Use a 100 micron and 40 micron fuel filter (see pic).

A fuel filter between tank and pump will conform I think, like xoliex said, there is already a filter from the suction tube in the tank.

Thanks for info.

 

[Tnfastbk]

With a filter right out of the tank you may have pressure issues. Not sure with an electric but with a mechanical one I know you will.