1994 5.7 TBI/ Vortec/ Intake/ EGR Question - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 11-04-2012, 06:58 PM
406cu.in. of tire smokin' fun
 

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You won't use the computer at all. The extra info I was giving you about it was just in case you wanted to work with what you have you would have the info. The older HEI distributor is exactly what you will use. You probably want a 650 carb, vacuum secondaries, electric choke.

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  #17 (permalink)  
Old 11-04-2012, 07:46 PM
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Ok sounds good. the noly other concern I have is there are three fuel line. one on the front of the tbi and two on the back. From what I was told two are return lines and I could not use one. Would these fuel lines screw right into a carb. Also why would I need vaccum secondaries. Just curious what that means
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Old 11-04-2012, 07:56 PM
406cu.in. of tire smokin' fun
 

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Oh ya, you will need a regulator also. I am using a return style regulator and it works fine. There are adapters you can buy to connect to the pipes at the TBI, but I didn't like that. I ran a new line from the filter to the regulator and another from the return pipe next to the filter to the regulator.

There are only two fuel lines. One is pressure from the pump and the other is for the fuel return back to the tank. Both are on the back of the TBI, so I'm not sure what the one on the front is for. Are you sure it's for fuel???

You're driving it on the street, so you would want vacuum secondaries. That will keep them closed unless you are really on it. Mechanical secondaries are for racing. They open and let more air (and fuel) through the carb when needed.
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Old 11-04-2012, 08:06 PM
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Ya I dont know I figured it was a fuel line. It reminded me of the fuel line on the front of the quadrajets. As far as a regulator do you remember which one you have and where you got it. And the fuel lines where can I get the adaptors or do you recomend just running new fuel lines. But are they pre bent already or how did you come up with this setup??
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  #20 (permalink)  
Old 11-04-2012, 08:39 PM
406cu.in. of tire smokin' fun
 

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I had one that I was using with my TBI setup because it was vacuum referenced. It is way overkill for what you need. It is an Aeromotive universal bypass regulator. I know there are others that will work but I don't know what they are.

As for the fittings, I "think" I found exactly what I am using. I went through some receipts and came up with a summit racing 2200077, -6, 3/8 male hard tube fitting (for return line), and an Earl's 991955, -6 to 16mm x 1.5mm fitting (connects directly to the fuel filter). Where I picked up the connection was at the filter and then ran braided lines to the regulator.
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Old 11-04-2012, 09:52 PM
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Ok check out these parts. Will this be what I need?? Also do I need to get two of the braided hoses. Does one hose come from the filter to the regulator and from the regulator to the inlet. Then what about the return line. Will I leave that how it is and screw that into the carb?

Holley 12-804 Holley Fuel Pressure Regulators

JEGS Performance Products 103106 JEGS Fuel Injection Fittings

JEGS Performance Products 110551 JEGS Hard-Line AN Adapter Fittings

Spectre 29404 Spectre Steel-Flex Hose
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  #22 (permalink)  
Old 11-04-2012, 10:05 PM
406cu.in. of tire smokin' fun
 

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I don't think the regulator will work for a couple of reasons. The first is that it isn't adjustable to what you will need. You will need 5-7psi and that one only goes to 4, so you could run out of fuel at wide open throttle. The other problem is that it isn't a bypass regulator. I could be wrong, but you have an EFI fuel pump that is capable of a lot higher pressures, so I think you may need a return style regulator. Maybe someone else could chime in here.

Mine has three connections. One from the pump (filter), one to the return line, and one to the carb.

The other stuff looks good. The one connector says GM TBI, so I hope that is the one that I used for the filter. The hardline one should work great. I would either get two of those hoses or a longer one that you can cut.
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Old 11-04-2012, 10:14 PM
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http://www.jegs.com/i/JEGS-Performan...15912/10002/-1

Looking at the pictures on it the bottom is in and both sides are out. The line from my fuel filter will go into the bottom. Then ill have a hose from the left side go to the inlet on carb. Then ill have a hose coming from the outlet on carb back to the right side of the regulator. Thats the way im understanding it if im correct??????????? I guess I could start a new thread, I know im asking alot

Last edited by allansmith859; 11-04-2012 at 10:20 PM.
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  #24 (permalink)  
Old 11-05-2012, 08:01 AM
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ohh didn't see you where going with a carb.
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Old 11-05-2012, 03:49 PM
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I couldn make up my mind but think it would be a better option
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Old 11-05-2012, 06:45 PM
406cu.in. of tire smokin' fun
 

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I don't think that one will work either. It has one inlet and two outlets. You would need something with one inlet, one outlet, and a return port.
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