Electric Fuel Pump ?
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Electric Fuel Pump ?

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    "Mad" Member Jet Mad's Avatar
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    Default Electric Fuel Pump ?

    I have never run an electric fuel pump on any of my boats and have no knowledge on the requirement for fuel delivery and setup especially on my 455 Olds.

    I will be running a 850DP Holley or 800CFM Edelbrock Marine. The Edelbrock I am still waiting on from the US.

    1. I do not have fuel returns installed on my dual tanks, do I need to install returns?

    2. What Psi pump do I use and Gallon P/H for fuel delivery.

    3. Do I need a regulator?

    4. Do I need a emergency cut off switch for the pump?

    Thank you in advance.

    Wikus
    Last edited by Jet Mad; 12-04-2010 at 12:04 PM.


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    Cas
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    Edelbrocks only need about 5.5lbs of fuel pressure, any more than that and they run a chance of flooding out. Holleys need about 7psi. A regulator is a very good idea no matter what fuel pump you have just in case something goes haywire in the pump and it pumps at a higher psi. A friend of mine had a Holley red fuel pump that started pumping about 16 psi and without the regulator, gas was coming out of places it shouldn't have on a Holley 750 DP.

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    Quote Originally Posted by Jet Mad View Post
    I have never run an electric fuel pump on any of my boats and have no knowledge on the requirement for fuel delivery and setup especially on my 455 Olds.

    I will be running a 850DP Holley or 800CFM Edelbrock Marine. The Edelbrock I am still waiting on from the US.

    1. I do not have fuel returns installed on my dual tanks, do I need to install returns?

    2. What Psi pump do I use and Gallon P/H for fuel delivery.

    3. Do I need a regulator?

    4. Do I need a emergency cut off switch for the pump?

    Thank you in advance.

    Wikus
    IMHO, you dont need an electric fuel pump...a good mechanical pump, like an Edelbrock or Clay Smith will work just fine & much less headaches ...also...unless ur motor is built to the hilt, an 800/850cfm carb is "way" overkill!!!!!! ...a good 650/700cfm carb will work a whole lot better...you dont need fuel returns in your tanks...a reg is a good idea as mentioned...you dont need an emergency cut-off switch...if you "insist" on running an electric pump, i would check out the in-line pump (Waldo, i think) which is a "pull" type pump instead of the Holley electrics which are "push" type pumps ...if you run a Holley, use a Holley Blue & mount it as close to the tank as possible & as low as you can, it will work better...just sayin' my HO & .02 cents as to what i would do/run

    FastRat

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    "Mad" Member Jet Mad's Avatar
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    Quote Originally Posted by FastRat View Post
    IMHO, you dont need an electric fuel pump...a good mechanical pump, like an Edelbrock or Clay Smith will work just fine & much less headaches ...also...unless ur motor is built to the hilt, an 800/850cfm carb is "way" overkill!!!!!! ...a good 650/700cfm carb will work a whole lot better...you dont need fuel returns in your tanks...a reg is a good idea as mentioned...you dont need an emergency cut-off switch...if you "insist" on running an electric pump, i would check out the in-line pump (Waldo, i think) which is a "pull" type pump instead of the Holley electrics which are "push" type pumps ...if you run a Holley, use a Holley Blue & mount it as close to the tank as possible & as low as you can, it will work better...just sayin' my HO & .02 cents as to what i would do/run

    FastRat
    FastRat,

    I also prefer a mechanical pump, but I am running a timing gear set and not a timing chain, no pump drive on the setup.

    I have done quite a bit to the motor, rough calculation and digital dyno puts me at about 725Hp. I hope to see about 600HP spinning an "A" impeller.

    I will have a look at the pumps on the net, I will definitely run a pressure regulator with the setup.

    Thanks for the response.

    Wikus


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    "Mad" Member Jet Mad's Avatar
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    Quote Originally Posted by Cas View Post
    Edelbrocks only need about 5.5lbs of fuel pressure, any more than that and they run a chance of flooding out. Holleys need about 7psi. A regulator is a very good idea no matter what fuel pump you have just in case something goes haywire in the pump and it pumps at a higher psi. A friend of mine had a Holley red fuel pump that started pumping about 16 psi and without the regulator, gas was coming out of places it shouldn't have on a Holley 750 DP.
    Cas,

    I also figured about 7Psi, but was not sure. I run 'Off Road" needle and seats in the Holley prevent flooding of the carb, but I do not know at what pressure the operate.

    Wikus


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    "Mad" Member Jet Mad's Avatar
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    Quote Originally Posted by Cas View Post
    Edelbrocks only need about 5.5lbs of fuel pressure, any more than that and they run a chance of flooding out. Holleys need about 7psi. A regulator is a very good idea no matter what fuel pump you have just in case something goes haywire in the pump and it pumps at a higher psi. A friend of mine had a Holley red fuel pump that started pumping about 16 psi and without the regulator, gas was coming out of places it shouldn't have on a Holley 750 DP.
    Cas,

    I also figured about 7Psi, but was not sure. I run 'Off Road" needle and seats in the Holley prevent flooding of the carb, but I do not know at what pressure the operate.

    Wikus


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    Cas
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    Wikus,
    I used to run the spring loaded needle and seat in a Carter AFB (Edelbrock) on my CJ5 Jeep years ago, I still ran it with the regulator set at 5.5 psi. The psi is the max the carb can handle before it may flood. If it's a little lower and still keep the bowls with the proper amount of fuel in them throughout the rpm range, it'll be fine.
    Oh yea, I have the fuel pump hooked up to a separate switch and not hooked up to the ignition switch. Then again, I also have it mounted inline with the mechanical and it's there only to prime the carbs after the boat has sat for a little while. After I fire it off, the engine runs off the mechanical.
    I really hate to have to crank the engine over for any length of time to fill the bowls thus the reason for both.

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    Quote Originally Posted by FastRat View Post
    IMHO, you dont need an electric fuel pump...a good mechanical pump, like an Edelbrock or Clay Smith will work just fine & much less headaches ...also...unless ur motor is built to the hilt, an 800/850cfm carb is "way" overkill!!!!!! ...a good 650/700cfm carb will work a whole lot better...you dont need fuel returns in your tanks...a reg is a good idea as mentioned...you dont need an emergency cut-off switch...if you "insist" on running an electric pump, i would check out the in-line pump (Waldo, i think) which is a "pull" type pump instead of the Holley electrics which are "push" type pumps ...if you run a Holley, use a Holley Blue & mount it as close to the tank as possible & as low as you can, it will work better...just sayin' my HO & .02 cents as to what i would do/run

    FastRat
    I believe he meant Weldon race pump. IMO the best fuel pump built.
    An electric fuel pump will blow right thru the needle & seat without a regulator. You need to run a regulator and best if you can run a return to keep the pump cool thus a longer life. But a lot of guys run a dead head regulator.

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    Senior Member ap67et10's Avatar
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    Quote Originally Posted by cp562 View Post
    I believe he meant Weldon race pump. IMO the best fuel pump built.
    An electric fuel pump will blow right thru the needle & seat without a regulator. You need to run a regulator and best if you can run a return to keep the pump cool thus a longer life. But a lot of guys run a dead head regulator.

    weldon makes great products, no doubt a fuel system leader. however the fuel pump FastRat was referring to are the walbro fuel pumps. they also make great products but are more well known in the import and modern car world. they often are the go to pumps for people upgrading their cars with something where an upgraded fuel pump is needed. the walbro 255 is probably the most common pump upgrade on fuel injection cars out on the road today. never heard a bad thing about them either.

    Weldon and Walbro both make top of the line fuel system component upgrades, can't go wrong with either of them.

    Andrew

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    Quote Originally Posted by ap67et10 View Post
    weldon makes great products, no doubt a fuel system leader. however the fuel pump FastRat was referring to are the walbro fuel pumps. they also make great products but are more well known in the import and modern car world. they often are the go to pumps for people upgrading their cars with something where an upgraded fuel pump is needed. the walbro 255 is probably the most common pump upgrade on fuel injection cars out on the road today. never heard a bad thing about them either.

    Weldon and Walbro both make top of the line fuel system component upgrades, can't go wrong with either of them.

    Andrew
    yes, that is the pump i was refering to (Walbro 255)...it is a "great" pump ...the Weldon is also a great pump...IMO, they are both better than Holley electrics! ...just sayin'

    FastRat

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    Wikus,
    I like the 850 DP in a boat because of the mech secondaries. The Edelbrock will probably give you better gas mileage. Electric fuel pumps have been talked about a lot on here. Do a search and you will get a lot of inputs. First I have heard of Walbro.

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    sunkisst80 slokist80's Avatar
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    Dos anyone have anything to say about Mallory fuel pumps?

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    sunkisst80 slokist80's Avatar
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    Dos anyone have anything to say about Mallory fuel pumps?

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    Senior Member 74glencoe's Avatar
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    Quote Originally Posted by FastRat View Post
    IMHO, you dont need an electric fuel pump...a good mechanical pump, like an Edelbrock or Clay Smith will work just fine & much less headaches ...also...unless ur motor is built to the hilt, an 800/850cfm carb is "way" overkill!!!!!! ...a good 650/700cfm carb will work a whole lot better...you dont need fuel returns in your tanks...a reg is a good idea as mentioned...you dont need an emergency cut-off switch...if you "insist" on running an electric pump, i would check out the in-line pump (Waldo, i think) which is a "pull" type pump instead of the Holley electrics which are "push" type pumps ...if you run a Holley, use a Holley Blue & mount it as close to the tank as possible & as low as you can, it will work better...just sayin' my HO & .02 cents as to what i would do/run

    FastRat
    I relize this thread is about fuel pumps, not carbs, but wouldnt a 650/700 cfm carb cause some problems if he is at a high altitude? I run a 750, but I tried a 800 dp off a friends boat once and got about 150 more rpm. I usually boat at 3000+ above sea level.

    On the subject of fuel pumps, I like electric, and a reg is a good idea. something to think about is that many elec pumps wont "siphon" fuel out of the tank. I have one of those primer bulbs off an outboard between my pump and tank.
    Boating is nothing like cocaine, boating is much more addictive and results in bigger parties!

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