Elec fuel pumps

[Cowman85]

Hey guys just wondering what you would recommend for a elec fuel pump with a mild 350 with a 4bbl q jet?
there are a few available, just not sure if its worth spending the extra $40 to go from 97gph to 110-125gph?
The engine will be built at most to mild-mid performance within the next 2 years.

[HAULIN IT]

For a mild 350 street vehicle the 97 gph will be plenty. The Carter pumps are very reliable, I've used several of them. The ones they call 8 psi seem to show about 6.5 psi on a gauge & work fine without a regulator. You want to mount it near the tank, the electric pumps like to push fuel, not suck it. Lorne

[Cowman85]

thanks lorne!

[Cowman85]

ok got one but it was not the one i wanted, i'm hoping to God that this is not too small.
its an inline pump with a filter too.
"posi flo" universal electric fuel pump
12v, 4-7psi, 32 gph, 120Lph, eliminated vapor lock, self priming.

will this be sufficient for my 3/4 ton 2wd 35ci 4bbl?


i've already installed it, its pretty noisy too, i've filled the line going to the tank with gas hooked it back up and tried starting and nothing, it doesnt seem to be pumping anything.
aside from taking the line off from the carb and filling it full of gas is there another way to get this thing going?

[HAULIN IT]

You don't really need to prime an electric pump. Are you sure you have it installed correctly (inlet-from tank, outlet-to carb)? Could you have it installed in the return line? Why did you decide to install the electric pump? Lorne 

[Irish_Alley]

to go with what Lorne said did you use the bigger line out of the tank?

[Cowman85]

i used the 3/8 line which is the biggest line i believe (same lines that were hooked up before)
i'm pretty sure i installed correctly, kept the flow in mind etc, i will check again though.
i heard that these pumps only like to push not pull so getting the fuel back into the line from the tank is required for a weak pump, you guys have any thoughts on that?

i installed this one because it was only $80 and i'm flat broke right now, skipped a new cam because i dont want something else to go in the engine if i wake it up, then i really wouldnt be able to afford to fix it. I was waiting to do a rebuild to replace the internals etc.

[Irish_Alley]

try taking it out and testing it in a bucket"not submerged" but put a fuel line on her and see if its pumping if it does double check the lines

[Cowman85]

i should be able to test it this afternoon.
 
so straight up this pump should be enough to pull the fuel right out of the tank even with the air in the line right now?
 

[Cowman85]

well i did the test on the pump and it worked well,
jerry can(in line) and filter/pump in the middle and then dropped the other line into a clear glass jar, all went well.
so after the test (ran for 5 min) i took the lines off (trying to keep as much gas inline as possible) and hooked everything back up.
started great and ran great, for a couple of minutes, while putting my tools away it started to die down (i noticed because i just adjusted the idle screw again), then just died, i tried to start it again and nothing, but i could tell from the sound of the pump that there was no fuel in it again.
so this pump is not capable of pulling the fuel from the dual tank setup?

[Prong]

Sounds like you've got it plumbed in the wrong spot. Do you have it attached to the outlet on the switching valve, because that's where it needs to be.

[Cowman85]

its the middle line from the switching valve, the same one i ran for the test is the same that is always used.

[HAULIN IT]

I didn't see where you answered my question as to "Why did you change to the electric pump?" Without knowing what went on, you/we may overlook the real problem. Lorne

[Cowman85]

sorry lorne didnt mean to, I was having problems stalling and not starting when i first got this truck. I changed out the filters, pump (double checked the spring), spray cleaned the carb, changes lines, i ended up running it out of a jerry can for awhile lol. I ended up getting it towed to a mechanic recommended by a friend of a friend, he diagnosed it as being the fuel pump lobe off the cam. Right now i am a student at nait so i am on a strict budget, i would rather of replaced the cam but i didnt want to wake the engine up if there were anymore problems. We decided to bypass the problem:  electric fuel pump, block off for the old one.
With that all done, he found me a used one (posted in another link) and away i went. Well that pump crapped out a week or so later, knowing that i dont want a doorknob working on my truck i needed to fix this myself. So i went shopping for pumps, i could only find 2 different types, the same large type that was on the truck for 200(holley blue 120gph) at JB's or an 80 small inline at napa(posi flo 32gph). So i told the guy at napa what i had, how much line etc, and asked him if this would be sufficient for my application, he said yes we recommend it for half tons usually. I figured that was good enough as i wanted better gas mileage and dont care to speed much anymore, i went with it, here i am now...

[Cowman85]

i called jb's again and a different guy told me they had a holley 97gph for 150, might get that in the end but will have to toss couch for change lol