I have searched this topic for a while and while there is a ton of info...IT doesn't completely pertain to me.

I have an 86 camaro. It has a 383. Right now there is a '6 line from the tank to the holley blue electric pump. Then it goes from the pum to an aeromotive two port regulator. then from the regulator into the dual feed line and into the carb.

When I turned the pump on it seemed to just start dumping fuel into the carb. I turned it off before it would flood it out.

My question is would it have stopped dumping fuel when the carb filled up or just kept flooding.

Do I need to run a return from the dual feed line to the tank? How about from the regulator to the tank?

Thanks!

 

an electric pump needs a return line

 

It should but its not totally necessary, as long as you have a regulator. Friend of mine uses a Holley blue and regulator w/o a return, and it works fine. Having a return line is better though, as I would imagine it would mean less of a load on the pump, making it last longer - but it does work without it.

 

Adam is exactly right.

It will work without a return, but you really should run one. It keeps the fuel cooler, and puts a LOT less strain on the pump. If you turn it on and it is plumbed right, it should just start ticking or clicking a little as it is getting forced to stop pushing due to the regulator.

Make sure you adjust the reg. to be really low pressure furst and work your way up, this will prevent the carb from flooding.

 

Agreed, I don't see any reference to the reg outlet pressure during this event.

But, if you're using an in-tank electric pump, eventually you will want a return-style regulator (not a return from the dual feed line) so that the pump will have a constant flow of fuel to keep it cool. Dead-headed, you're going to burn out the pump.

Just to be sure of details, exactly which Aeromotive reg are you using?

 

On a fresh carb you will see quite a bit of fuel going into the bowls before it stops. It should flow in like Niagara Falls until the bowls fill and close the inlet valves, at which point flow will stop abruptly.

 

Thanks guys. Well, I tried it again and it didn't get all crazy. The fuel stops because the pumps internaly stops the pressure when the carb doesn't demand it. I am going to eventually put a return line on it. The regulator is a aeromotive 13201 i think. Two ports out. Still not sure if I should run it from the back of the carb feed line.

 

i use a t fitting the front port being the inlet then one for the return and the other to the carb, it works fine and the car has a steady 5 psi