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extrenal electric fuel pump.

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Old Sep 19, 2006 | 11:06 AM
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91firebird81's Avatar
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extrenal electric fuel pump.

hey i have to remove my stock fuel pump because it doesn't work. i'm gonna go ahead and get a 7 psi electric fuel pump for my carb setup. do i need to mount the pump near the tank or can i mount it anywhere?
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Old Sep 19, 2006 | 04:24 PM
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
electrics must mount near the tank as close as possible. the other option is to leave the sock there and setup the gas tank like a carb car and mount a mechanical fuel pump on the engine instead.
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Old Sep 19, 2006 | 10:15 PM
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From: Madison, WI
Car: 1986 Camaro Z28
Engine: 400
Transmission: T5
Axle/Gears: 10 bolt Posi 3.73
Yep like he said, most electric fuel pumps are "push". They must push gas not suck. I have a Holley Red electric pump. Works well. I think it was like 100 bucks.
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Old Sep 20, 2006 | 02:51 PM
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thats what i ordered yesterday lol the holley red electric pump. perfect! where did you mount it? any pics? my engine doesn't have provisions for a mechanical pump.
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Old Sep 20, 2006 | 05:45 PM
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cause these elctric pumps are pushers not pullers so i have no clue where to mount it.
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Old Sep 20, 2006 | 09:45 PM
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xpndbl3's Avatar
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
mount it near the gas tank somewhere. drop the line and mount it on the spare tire well, the area on the other side where the rear storage box is, the rear main well, the frame near the LCAs, etc etc
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Old Sep 21, 2006 | 12:23 AM
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From: Madison, WI
Car: 1986 Camaro Z28
Engine: 400
Transmission: T5
Axle/Gears: 10 bolt Posi 3.73
I mounted mine where there is a rubber hose by the gas tank. The lines coming out of the tank are metal and then there is a rubber hose about 8 or 9 inches long and then metal lines again up to the front of the car. I put it there. You should try to mount it staight up and down if possible. Remember, when you break the line gas will come spilling out.

Check out my page about the install.
https://mywebspace.wisc.edu/gmarsice...el%20Lines.htm
I did end up buying another red pump and it does not leak, works great.
Also, check out my main page.
https://mywebspace.wisc.edu/gmarsicek/web/main.htm

Last edited by Codename 47; Sep 21, 2006 at 12:27 AM.
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Old Sep 25, 2006 | 11:06 AM
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i hooked mine up recently, but now my problem is i get way too much fuel and it floods the carb. i have it hooked up to a switch. do i need to turn it on for a few seconds then turn it off. start the car and when it begins to run turn it back on again?
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Old Sep 25, 2006 | 01:10 PM
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Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
No. Def not what you need to do.

What regulator are you running? Is it a return style. Sounds like you have a return style regulator and no retun line maybe....

Once we know the reg. then it will start to make sence.
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Old Sep 25, 2006 | 05:40 PM
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From: Madison, WI
Car: 1986 Camaro Z28
Engine: 400
Transmission: T5
Axle/Gears: 10 bolt Posi 3.73
No; you should be able to turn the pump on and then start you car. Sounds like you have a carb problem. The Holley Red pump does not require the use of a regulator. I have mine running a single feed line with no return line. Idealy, you should run a return line if possible, as it will reduce the stress on the pump, prolonging its life. I'm not super knowledgeable with carbuerators yet, but here is what should be happening, I think (someone correct me if I'm wrong). The pump should send a bunch of fuel up to the carb in which it should spill into the bowls. From there the bowl should be filled up to the level you have your floats set at. When you give it gas that fuel is then squirted out and mixed with air and sent to the cylindars. I'm not sure how you could be getting fuel in the cylindars with out giving it gas? Maybe a leak somewhere? I'd post over in the Carbuerators form, they'd prolly know best.
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Old Sep 26, 2006 | 06:56 AM
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Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
^^^


Sounds like the best advice you are oing to get from this thread/info.
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