EFI to Carb Upgrade?

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Date: Sun, 27 Apr 1997 17:42:35 -0400 (EDT)
From: Spinnetti@aol.com
Subject: EFI to Carb. swap
To: Toy4x4@tlca.org

In a message dated 4/27/97 4:39:01 PM, you wrote:

>I'm getting rid of my EFI for a carb. and have a couple of questions.
>
>I'm pulling out (permanently) the charcoal canister (EVAP) now and was
>wondering what I should do to the line from the canister to the gas
>tank.  Should I plug it or put a small vent filter on it?  I wasn't sure
>if the tank had another way of venting pos. pressure.  If it does have
>another vent I was thinking of using this line for a second return line.
>
>I bought a Mallory fuel press. regulator so I could keep the stock fuel
>pump and regulate it down to 3-6 psi.  In the instructions for this unit
>it says to have a return line of equal or greater diameter than the feed
>line from the pump.  Since I'm regulating the pressure down so far (3-6
>psi), I was thinking about putting a splitter and two lines on the
>return end of the regulator, hooking one line to the stock return line,
>and the other to the line from the charcoal canister to the tank.  If
>this is possible it would keep me from running a larger line to the
>tank.  What are your thoughts on this idea?

Dont plug the vent line! it will blow out everywhere!
I think you'll be sorry after the swap. EFI is tuneable..... just use an
aftermarket computer. My friend is dumping his sidedrafts, and going back to
EFI.

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Date: Sun, 27 Apr 1997 19:16:30 -0400
From: "R. W. 'Butch' Stiles" 
Subject: EFI to Carb. swap
To: Toy4x4@tlca.org

Jughead wrote:
> 
> I'm getting rid of my EFI for a carb. and have a couple of questions.
> 
> I'm pulling out (permanently) the charcoal canister (EVAP) now and was
> wondering what I should do to the line from the canister to the gas
> tank.  Should I plug it or put a small vent filter on it?  I wasn't sure
> if the tank had another way of venting pos. pressure.  If it does have
> another vent I was thinking of using this line for a second return line.
> 
> I bought a Mallory fuel press. regulator so I could keep the stock fuel
> pump and regulate it down to 3-6 psi.  In the instructions for this unit
> it says to have a return line of equal or greater diameter than the feed
> line from the pump.  Since I'm regulating the pressure down so far (3-6
> psi), I was thinking about putting a splitter and two lines on the
> return end of the regulator, hooking one line to the stock return line,
> and the other to the line from the charcoal canister to the tank.  If
> this is possible it would keep me from running a larger line to the
> tank.  What are your thoughts on this idea?
> 
> Jughead

Jughead,
	I have a Mallory 110 pump and bypass regulator left over from my 
Sammi, I know for a fact that you need a return line at LEAST equal to
the supply in order for the regulator to work. I found this out the hard
way, with a pump internally bypassed at 7 psi. I don't know what volume
the factory pump is capable of, but I know it runs at something like 40 
psi so I highly recommend a new return line (I know, $$$$!) at least a 
- -6 or equivalent. Besides, I just read that other post about the vent
line, you definitely don't want to plug that! ALL the newer cars are
vented thru the charcoal cannister nowadays to keep those nasty vapors
out of the atmosphere. Good luck, keep us posted on your progress.

			Butch Stiles
			rokitman@erols.com

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