EFI to Carb

JUICE ONE · Aug 31, 2006

Why is it that most of the articles I read about of an EFI to carb swap state that you must remove the stock in-tank fuel pump and install either a mech pump or an aftermarket in line pump?
Couldn't you just wire the in-tank pump to turn on from an ignition source and use a regulator w/ a bypass to get the proper fuel pressure you need?

88gt · Aug 31, 2006

I would think that you should be able to. When I had my slomaro, I threw the crosswire injection out and put a carb on. used the in-tank pump, pressure regulator, computer still wired in & pulled the bulb for the check engine light.

Things may be wired differently for the ponys in-tank pump...you can try, worse tha could happen is you need to take it out anyway..

edit..when the in-tank did die, I put a mechanical pump on and let it pull though the in-tank w/o problems.

Grits · Aug 31, 2006

JUICE ONE said:
Why is it that most of the articles I read about of an EFI to carb swap state that you must remove the stock in-tank fuel pump and install either a mech pump or an aftermarket in line pump?
Couldn't you just wire the in-tank pump to turn on from an ignition source and use a regulator w/ a bypass to get the proper fuel pressure you need?

you can... but its really a poor way to do it.. the in tank pump will eventually burn out...

easy way to do it is drop the tank and put a piece of hard line in place of the old electic pump, then just run a holley red or blue electric. there not that expensive. Just me.

ls1beater4eva · Aug 31, 2006

if i were doing the swap i would buy the areomotive fp regulator it can do pretty much what ever you want from 0 to 100 psi it works great. then you dont have to drop your tank, or pull timing covers to install ecentrics or wire up a new fp.

z2o_what · Sep 1, 2006

JUICE ONE said:
Why is it that most of the articles I read about of an EFI to carb swap state that you must remove the stock in-tank fuel pump and install either a mech pump or an aftermarket in line pump?
Couldn't you just wire the in-tank pump to turn on from an ignition source and use a regulator w/ a bypass to get the proper fuel pressure you need?

i thought the same thing when i did my swap... but after pricing a regulator with bypass i realized that it would be cheaper to change the timing cover and use a mech. pump ($20) and i knew that this would work... there wasn't any "i hope this works" or "this should work" invloved

JUICE ONE · Sep 1, 2006

Grits said:
you can... but its really a poor way to do it.. the in tank pump will eventually burn out...

easy way to do it is drop the tank and put a piece of hard line in place of the old electic pump, then just run a holley red or blue electric. there not that expensive. Just me.

So your telling me that a Holly pump will never burn out or fail. Don't they all eventually fail?
Wouldn't it be easier to work just under the hood plumbing the lines instead of jacking the car, dropping the tank, pulling the pump and replacing it w/ a tube, putting your tank back in, installing a new pump ( either splicing in an elect. pump or tearing apart the front of your motor to tnstall a new timing cover), and still have to do all the plumbing under the hood?
The way I see it is that the fuel pump is working the same way as if it was still a f/i engine - getting fuel from point A to point B. Not only at a lower pressure but at a lower resistance.

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