dual fuel pump

78-79fordman

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ok I went dual fuel Bosch pumps setup regulated return from 444fab . here's the pump setup in pics . I'm running stock injectors as of now but will be upgrading to 238/80 in the next couple months when I get the funds saved . starting with fuel since the stock pump started leaking .

so the questions

can I hook up the secondary pump to a pressure switch on the regulated return. if so what pressure should I make the secondary pump kick on . and in pics u can see the one way check valve is installed on the top pump . should it be the primary or secondary pump.
 

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78-79fordman

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this is my second kit from 444fab also . other kit was a single Bosch setup but a may add a secondary pump to that kit also .
 
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Magnum PD

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Might be better off just letting both pumps run. Over complicating it
 

78-79fordman

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will I have been told to only run one and have the other on a switch which would work but I would like it to come on with out me thinking to turn on a switch
 
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This is my exact plan for a fuel system as well. I likely do not need a second pump with 160/30’s. My thought is redundant backup. Problem is if the “spare” pump is never used it may not work when finally needed. Something has to excercise it. On landfill gas blowers we just switched to the other one every 30days. Guess I could just switch it every oil change. Thinking strongly of a fuel pressure switch to trigger secondary pump on low psi plus perhaps an excercise circuit like starter operation or glow plug activation causes pump to run. Or the KISS principle just put in a switch to select and switch it now and then....
 

78-79fordman

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Ya I was thinking add another pump to my other 444fab that's just one Bosch pump also even thought it wouldn't need but for if it failed
 

78-79fordman

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Any thoughts on this it would be open meaning turn the pump on tell it gets 60 or above the way I read . If I set my pressure at 65 which I have on my other truck would this be the pressure at I would the second pump on or off . Not sure this is fuel rated though.
 

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EPA

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Anyone got and thoughts on the pressure the switch would need to kick on the pump

Autometer elite gauges have out puts for this type of thing... You set low fuel pressure warning and can have it send an output signal to switch on the 2nd pump... They also look good.
 
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kip4234

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my thoughts and how I have mine ran. I have two super duty pumps and run both at the same time. I did do separate power sources and fuses just so if one fuse would go or one pump went out and I was driving that nothing would go wrong or go out and I would make it home. I did this for two reasons one being I don't want to break down and the other reason I run two pumps is just for the additional flow.
 

JCart

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A single pump not handle 238/xxx flow? I’ve done a number of DIY e pumps and logged thousands of miles and have used stock 7.3 pump (in fact used ones from wreckers) and a 6.0 pump. Have never let me down. Setting to do two more on current trucks, with stock 7.3 pump and will only use one pump per truck. Injectors aren’t huge so maybe that’s why they’ve lasted so well.

Used to keep a spare pump with me on long trips as they are easily swapped out, much less complicated and you’ll know pretty much if it fails.
j
 

superpsd

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I was going to go that route of a second intermittent pump and I came down to the idea of using a switch on the throttle pedal with an adjustable bracket. The pressure switch may work but it may also cause problems. Under a low pressure situation the pump would kick in. Bump pressure up. Hit the limit then power down and repeat causing unstabe pressure pulsations. I was going to use a small PLC and add in time delays etc but scrapped the idea as it was too complicated. The throttle activated is best in ky oopinion throttle demand say set for 70% and above pump kicks in and then back out of pedal pump off. Simple design and would work. A single SD pump will support 238CC injectors btw.
 

78-79fordman

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I was going to go that route of a second intermittent pump and I came down to the idea of using a switch on the throttle pedal with an adjustable bracket. The pressure switch may work but it may also cause problems. Under a low pressure situation the pump would kick in. Bump pressure up. Hit the limit then power down and repeat causing unstabe pressure pulsations. I was going to use a small PLC and add in time delays etc but scrapped the idea as it was too complicated. The throttle activated is best in ky oopinion throttle demand say set for 70% and above pump kicks in and then back out of pedal pump off. Simple design and would work. A single SD pump will support 238CC injectors btw.
Interesting switch setup any pics .
 

EPA

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Same thing could be accomplished with a boost switch... Say you're fuel pressure drops off at 35psi... Once the boost switch/sensor reads 35psi pump comes on until you drop under 35... I had this set up on my talon.. Dual walbro 450 pumps... 2nd would kick on at 45 psi of boost... I later removed that switch setup and let my boost gauge send the output signal to the 2nd pump... Made it easy to adjust what psi i wanted it to kick on at.
 

78-79fordman

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Same thing could be accomplished with a boost switch... Say you're fuel pressure drops off at 35psi... Once the boost switch/sensor reads 35psi pump comes on until you drop under 35... I had this set up on my talon.. Dual walbro 450 pumps... 2nd would kick on at 45 psi of boost... I later removed that switch setup and let my boost gauge send the output signal to the 2nd pump... Made it easy to adjust what psi i wanted it to kick on at.

I do like the elite gauges it's a great option and I like the in the cab adjustability. The boost gauge could be better then the fuel pressure gauge as said above I worry about it on and off from the fuel pressure switching.
 
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78-79fordman

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Ya on another forum a good idea was to install a light on the secondary pump relay so it would come on when it was on . Which is a great idea . It would also tell u if the secondary was running full time .
 
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