fbirdroller

iTrader: (1)

i recently put a 350, non computerized with a holley 600, in my 91 firebird that had a 3.1 in it. my problem is i can leave it sit and run and rev in my driveway all day long but when i drive up the street its as if the bowls arent filling and i eventually stall and slow to a stop. i have a mech fuel pump on the block but i left the electric pump in the tank but simply disconnected it. should the disconnected fuel pump restrict my flow enough for me to actually run low enough on fuel in my system to have a problem? do i have to take the pump out and put a regular pickup in it?

1320_Guy

iTrader: (3)

I just made a carb pickup, works great.

Randy82WS7

you have to remove that pump in the tank it wont be abel to suck enough fuel through it without starving the carb

im surprised its even pulling the amounf ot fuel through it that it is already, wow

thats pretty lucky


you could either reconnect the electric pump in the tank and run a regulator to knock the pressure down to 9 to 13 psi

or drop the tank and remove the pump and put a piece of 3/8" fuel hose or tube and 3/8" screen sock in place of it

you could also cut the ending sock fitted tube off an old sender out of any vehicle with 3/8" diameter and connect that one to your sender- (in place of the electric pump of course)
good luck

intex1982

iTrader: (2)

you could either reconnect the electric pump in the tank and run a regulator to knock the pressure down to 9 to 13 psi

i did that to mine but i only running 5 psi on regulator do i need to get a bigger regulator

KrisW

iTrader: (5)

I have had some that will suck through the old pump without incident; it appears that you will not be one of the lucky ones...

Quickest fix I know of: Drop the tank, remove the sending unit, take the electric pump off and replace it with the same length of rubber fuel hose. Clamp your factory sock at the bottom to the bottom of your rubber hose. If you can't, then get one for a carbureted car and clamp it to the bottom. Clamp your rubber hose to the line at the top where the little stub of ribber hose goes to your electric pump. Re-insert and re-install fuel sender and tank.

Good luck!

five7kid

iTrader: (14)

There's a sticky at the top of this forum about converting an in-tank electric pick-up to an external pump pick-up. What was done by that originator is the only approach I would recommend, other than finding a factory non-in-tank-pump pick-up as used for '82-'86 carb'd vehicles.

plumminfool

Mine pulls through the factory fuel pump without a hitch. Its feeding a Demon 750 dp.

five7kid

iTrader: (14)

Consider yourself a lucky man. The split seems to be about 75-25, with about 75% not working well.

91 camaro racer

iTrader: (2)

what if you were to use the elec. pump to feed the motor? then use a regulator to drop the pessure?