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post #1 of 24 Old 10-11-2011, 11:49 AM Thread Starter
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dual pump question

2000 7.3


Been using a single pump setup for 60k miles 5 years so far.

want to setup to dual pump.

For D2 side just run as the stock pump was originally setup with it's return lines to D2 tank.

For WVO second pump to the blocked ports of the heads with check valve in series with fuel lines. I have a pump from Leon that has a built in regulator.
I was just gonna feed both heads with the output from this pump. No return.
Yes the oil is heated HOH and tank.

Just use a switch to power the selected pump on / off.

No selector valves.

No purge.

Just shut down to D2 last few miles before home. Shouldn't be alot of fuel in the heads left.

I have filtration in line with both pumps.

Trying to keep it simple.

Any comments concerns opinions?


Thanks and happy veggin.
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post #2 of 24 Old 10-11-2011, 12:39 PM
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this is how i did my obs until i could build a purge. you will likely still have a bit of veg in the end of the heads but not much. worked fine. do you have an OBS?

imho, use relays for switching. no need to bring 30amps to a switch in the cab. this time i will be set up nearly the same on my SD, but ill have a purge valve tied in after the wvo CV. total cost, probably $60. $60 for peace of mind poly prevention. it will also be set up to backflush the filter a bit, good for those -x winter nights.

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
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post #3 of 24 Old 10-11-2011, 05:10 PM
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sounds good enough for the 7.3. Just make sure to always have oil above 140 degrees or engine at normal operating temp (coolant above 185 degrees) before switching over.

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post #4 of 24 Old 10-11-2011, 07:44 PM
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While a purge valve is not necessary I would suggest you consider it. It is a very good thing to have IMHO. Make sure you have gauges. A pressure gauge is a must & a VO temp gauge is a good idea as well. If you live in a cold climate you may want to consider a 203 t-stat & a collant pump.

I use this 2 relay setup to switch pumps.dual pump relay 2 - Forums

2001 f-350 ext.cab. 7.3 auto non dually. 262k miles. New HD tranny at 67,000 miles. Boost, EGT, Tranny temp gauges. 04/10 DIY check valve VO conversion. 20 plate FPHE,Fass HPFP set at 70 PSI,TIH, 10 micron spin on filter with coolant wrap, 150 micron prefilter, hrydraforce purge valve, 40 gallon greasecar tank with hotfox, SS braided hose to heads, Oil temp, pressure & fuel level gauges. 110K miles on grease. Monitoring with Torque.
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post #5 of 24 Old 10-12-2011, 07:07 AM
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thats the relay setup i use.

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY 6637
Marinco Mod
DIY Electric fuel w/ wvo conversion

"A clean house is a sign of a mis-lead life."
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post #6 of 24 Old 10-13-2011, 08:00 PM
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Not sure if this was Leons' setup to begin with or not, but it looks like he installed some type of pressure switch to shut off the D2 pump, once the WVO reach a certain psi...its a part from Mcmaster-Carr...if this is the case, anyone know how to go about setting this up. Also, cant you just tap into the wire run'n to the pump from under the dash and put a switch off that wire, assuming, that wire is coming from a relay as well? It would be, your "tapping" into the relay wire from the ignition switch that toggles the D2 pump?

1999-2002 7.3 PSD - WVO Designs Wiki

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #7 of 24 Old 10-14-2011, 06:53 AM
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tubular031 has a pressure switch setup from mcmaster. all that thing is, is a pressure switch, no differnt really than a manual switch in your cab, i think he has a schematic of how he wired it. might shoot him a PM. also, i think i have a link to his conversion in my DIY sticky. i dont recall if the schematic is in there or not.

the relay setup simone posted is using the D2 pump power. pull the + from the pump and run it to #30 on the first relay.

im going to unplug my fuel bowl heater. i dont know what it draws, but there is no need for it, and with a 30 amp pump i dont want a fuse blowing due to unnessary load.

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY 6637
Marinco Mod
DIY Electric fuel w/ wvo conversion

"A clean house is a sign of a mis-lead life."
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post #8 of 24 Old 10-14-2011, 08:46 AM
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Quote:
Originally Posted by ridiculously_necessary View Post
tubular031 has a pressure switch setup from mcmaster. all that thing is, is a pressure switch, no differnt really than a manual switch in your cab, i think he has a schematic of how he wired it. might shoot him a PM. also, i think i have a link to his conversion in my DIY sticky. i dont recall if the schematic is in there or not.

the relay setup simone posted is using the D2 pump power. pull the + from the pump and run it to #30 on the first relay.

im going to unplug my fuel bowl heater. i dont know what it draws, but there is no need for it, and with a 30 amp pump i dont want a fuse blowing due to unnessary load.
I'm familiar with that #30 fuse, from ALOT of threads, where the heater, once trips the fuse, it kills everything. Being in So-Cal, i dont think i need it.

Still not understanding, how to "run" the + to that #30 on first relay, you posted....am an idiot understanding electric...hopefully i'm stealing the OP questions here, and not threadjacking.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #9 of 24 Old 10-14-2011, 09:12 AM
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when im doing this weekend is pulling the + on the fuel pump and pulling it back up to the engine bay where ill have my relays, then run a new wire down to the D2 pump. i dont really want to splice. just my preference.

so ill pull my D2 pump power, attache to #30 on my relay, then run a wire from 87a on relay #2 to my D2 pump.

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY 6637
Marinco Mod
DIY Electric fuel w/ wvo conversion

"A clean house is a sign of a mis-lead life."
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post #10 of 24 Old 10-14-2011, 09:15 AM
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Quote:
Originally Posted by ridiculously_necessary View Post
when im doing this weekend is pulling the + on the fuel pump and pulling it back up to the engine bay where ill have my relays, then run a new wire down to the D2 pump. i dont really want to splice. just my preference.

so ill pull my D2 pump power, attache to #30 on my relay, then run a wire from 87a on relay #2 to my D2 pump.
...got it brother. Atleast now, i'll be doing this..., to install relays, and my post didnt turn into this...

Thanks man.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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