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Old 09-19-2011, 08:53 PM
StudebakerDean
 
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electric fuel pump placement

hey all true or false
electric fuel pump needs to be as close to the tank as possible?
electric fuel pump needs to be lower than the tank?
electric fuel pump needs a relay so its not automatically powered when key turns?
electic fuel pump needs ot be mounted horizontal and level, and not angled w/ frame?
ford mustang gas tank and dolphin guages, any issues here?

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Old 09-20-2011, 02:19 AM
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All is true,a slight angle won't hurt you should also have an inline filter between the tank and the pump.DO NOT use a paper element filter especially a FRAM P.O.S. I had one fall apart and ruin a new pump in less than 2 hours.Here is a picture of what I use now made by Russell about $12-$15 which has a bronze element you can take out and clean.
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Old 09-20-2011, 05:33 PM
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Quote:
Originally Posted by Studedean
hey all true or false
electric fuel pump needs to be as close to the tank as possible?
electric fuel pump needs to be lower than the tank?
electric fuel pump needs a relay so its not automatically powered when key turns?
electic fuel pump needs ot be mounted horizontal and level, and not angled w/ frame?
ford mustang gas tank and dolphin guages, any issues here?
ANS
yes
don't think so
no
no
don't know

and I agree with Jeff re the pre-pump filter, I got mine from Summit.
And I put a paper filter near the carb.
edited to add the rule: suck through steel, push into paper.
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Old 09-20-2011, 05:42 PM
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All true , use a relay so you get adequate power to the pump , don't think I'd go w/ bronze element filter , to restrictive , better to go w, "screen " type, all you're trying to do is keep large debris out of the pump , some pumps have a built-in screen in the inlet . Check manufacturer's website for their specifics.

dave
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Old 09-20-2011, 06:04 PM
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electric fuel pump needs to be as close to the tank as possible? - Yes
electric fuel pump needs to be lower than the tank? - It helps prevent burnout by gravity feeding the pump.
electric fuel pump needs a relay so its not automatically powered when key turns? - Fuel pumps can pull a lot of current, so it's always a good idea to run a relay when possible.
electic fuel pump needs ot be mounted horizontal and level, and not angled w/ frame? - The fewer bends the lines take, the easier time the pump will have pushing the fuel up to the engine.
ford mustang gas tank and dolphin guages, any issues here? Not sure what you're asking here? Talking about fuel level gauge and Ford sending unit?
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Old 09-21-2011, 01:21 PM
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Fuel pump

Quote:

The only thing I would have a problem with is, pump should be lower than the tank. Mine is in the tank, so it can't be lower. In fact it's a GM pump, feeding a Mustang engine. Why you ask, Gm puts out more pressure, than the Ford. I'm not so sure mine is horizontal either as the outlet, and inlet are coming out and in the top of the tank. therefore the lines would be vertical.

Bob
You were correct in that I was assuming this was for an external pump setup. Internals can work harder fighting gravity because they're being cooled by the fuel itself. External pumps need all the help they can get to stay cool .

Last edited by Siggy_Freud; 09-22-2011 at 10:15 AM. Reason: Violation of guidelines. Please see: general board guidelines.
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Old 09-21-2011, 03:32 PM
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Quote:
Originally Posted by 35terraplane
The only thing I would have a problem with is, pump should be lower than the tank. Mine is in the tank, so it can't be lower. In fact it's a GM pump, feeding a Mustang engine. Why you ask, Gm puts out more pressure, than the Ford. I'm not so sure mine is horizontal either as the outlet, and inlet are coming out and in the top of the tank. therefore the lines would be vertical.

Bob
YOU'RE COMPARING APPLES TO ORANGES, AN IN TANK PUMP IS SUBMERSED IN FUEL , THE OBJECT IS TO KEEP THE PUMP SUPPLIED [BY GRAVITY] WHEN IT'S MOUNTED EXTERNALLY , ROTOR PUMPS PUSH ,NOT PULL LIKE A DIAPHRAM PUMP [THEY PUSH & PULL EQUALLY WELL.
DAVE
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Old 09-21-2011, 03:54 PM
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Pumps

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Originally Posted by 2old2fast
YOU'RE COMPARING APPLES TO ORANGES, AN IN TANK PUMP IS SUBMERSED IN FUEL , THE OBJECT IS TO KEEP THE PUMP SUPPLIED [BY GRAVITY] WHEN IT'S MOUNTED EXTERNALLY , ROTOR PUMPS PUSH ,NOT PULL LIKE A DIAPHRAM PUMP [THEY PUSH & PULL EQUALLY WELL.
DAVE
He didn't say what he had, he just made the statement a fuel pump has to be as close to the tank as possible. That could be a true or false question. but he did not state what kind of pump he was talking about. You could assume he meant external, but assuming can get you in a heap of trouble. there is the other answer to the question which I gave. He didn't say what was on the Mustang, I have a Mustang engine in my 33, I have FI, he didn't say what he was running.

The whole thing here is give everything in your question, so nobody has to assume anything. I do know the difference between the pumps, but I didn't assume which one he was talking about. I had a pretty good idea though.

Bob
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Old 09-21-2011, 05:03 PM
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He would not have asked the first two questions if the pump was inside the tank.....
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Old 09-21-2011, 05:06 PM
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Quote:
Originally Posted by Siggy_Freud
electric fuel pump needs to be as close to the tank as possible? - Yes
electric fuel pump needs to be lower than the tank? - It helps prevent burnout by gravity feeding the pump.
electric fuel pump needs a relay so its not automatically powered when key turns? - Fuel pumps can pull a lot of current, so it's always a good idea to run a relay when possible.
electic fuel pump needs ot be mounted horizontal and level, and not angled w/ frame? - The fewer bends the lines take, the easier time the pump will have pushing the fuel up to the engine.
ford mustang gas tank and dolphin guages, any issues here? Not sure what you're asking here? Talking about fuel level gauge and Ford sending unit?
X2 perfect
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Old 09-21-2011, 06:43 PM
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Pump

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Originally Posted by user151
He would not have asked the first two questions if the pump was inside the tank.....
There you go, assuming again.

Bob
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Old 09-21-2011, 07:01 PM
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Quote:
Originally Posted by 35terraplane
There you go, assuming again.

Bob
You got me, Bob. As Judge Judy would say, "Don't tell me what he was thinking!"

Tom
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Old 09-21-2011, 07:09 PM
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Pump

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Originally Posted by user151
You got me, Bob. As Judge Judy would say, "Don't tell me what he was thinking!"

Tom
Tom LMAO, I was thinking something like that.

Bob
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Old 09-21-2011, 08:20 PM
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pump outside the tank

its outside. my choices on placement are limited, thats why I asked. its either lower than the tank and that would be to the die of the tank and come around it with rubber tubing, or a foot away from the tank in metal but higher than the midplane of the tank
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Old 09-21-2011, 08:56 PM
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Pump

Quote:
Originally Posted by Studedean
its outside. my choices on placement are limited, thats why I asked. its either lower than the tank and that would be to the die of the tank and come around it with rubber tubing, or a foot away from the tank in metal but higher than the midplane of the tank
I will ask, not assume, is your frame rail opened or boxed? If it is open what I did on my old 40 Ford was run a steel line along the top of the tank into the frame, then down until it was flat, mounted my pump there. I had a good pump and never had trouble with it.

You never said what the car was, so we are in the dark there.

Bob
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