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Electric pump question...

T

tonyj

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hey guys, I've got a Carter electric pump mounted wrongly in the front of the truck, low on the framerail. It was there when I got the truck, and worked, so I haven't messed with it. The fuel pressure is way low at about 3psi and drops on reving. 71' Blazer with Edelbrock 1407 on a '96 vortec head roller 350 (stock otherwise...)

Here's my question... I've got an inline Holley pump that's normally used with the projection tbi setup, so I assume it puts out more than 14psi. If I mount it properly close to the tank and low, would it make sense that the internally regulated Carter would act like a fuel regulator? I've always heard that two electric pumps were better than one and since the Carter is already setup... Anyway I think you get the idea. Should I leave the Carter and run both or should I ditch the Carter and get a Holley fuel regulator?

I suppose I could just install the Holley pump and check the pressure at the gadge.... I guess I'm really wondering about the idea and what effect it might have on the longevity of both/either pump. I also wonder if one of the pumps failed, would the other keep the truck running? I'm guessing the Holley might be too much of a restriction for the Carter to pull through...

Anyway, thanks in advance. I'll probably go ahead and mount the Holley this morning. Do I have to use a relay or can I just use a keyed power?

Just don't want to do anything fuelish... :eek1:

Tony
 
I believe the holley is a variable unit and works thru the computer. It needs a constant 12.8 volts or shuts down,and that includes when u are starting the truck. I put mine thru a relay that came with the unit. good luck
 
Using 2 electric pumps is not a good idea. Also 14psi is way to much pressure for a carb so you will need to use a fuel pressure regulator. A carbed engine like anywhere between 3-5 PSI of fuel pressure.
 
Just correctly mount the one you have an be done with it.
 
79k20350 said:
Just correctly mount the one you have an be done with it.
Click to expand...

Good point, but I think it might be dying. It was working fine and now just 3 or less psi... I upgrading to tbi, but don't have the baffled tank yet. I figured i could knock off some of the work by installing the higher pressure pump in back. I just ordered a Holley FPR, so I'll just pull the Carter and put in the Holley pump. The complication of two pumps is probably a bad idea. Thanks for the input, guys.
 
It would be helpful to have ALL the info from the start. For TBI you need a pump capable of 15-20 PSI. You also will not use an external regulator as the TBI has its own regulator and also a fuel return.
 
4X4HIGH said:
It would be helpful to have ALL the info from the start. For TBI you need a pump capable of 15-20 PSI. You also will not use an external regulator as the TBI has its own regulator and also a fuel return.
Click to expand...

The pump I'm using came with the Holley Projection. The regulator is so I can use my carb until I get everything else (tank, return, etc...) setup.
 
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