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  #1  
Old 05-12-2011, 08:46 AM
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dual pump question

finally got a second pump. It's the WVOdesigns new pump.

Was using single pump with a 6 way valve to switch between tanks

Now gonna use a single pump for each tank.

Questions

When switching between tanks do you also switch power to the pumps?
Or are both pumps running all the time?

Thanks
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  #2  
Old 05-12-2011, 08:51 AM
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i had mine set up with two relays. switch slected the pumps. i also had a bed tank attached to the veg pump so no switching was necessary, jsut had check valves in place.

if your using the stock tanks i assume you could just wire the pump switch to the tank switch.

been a while since we've seen you around here!
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Old 05-12-2011, 11:17 AM
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so do you get any lag or air when switching between tanks since only one fuel line is pressurized at a time?

Been a while. Got 45K mi using the stock fuel pump for both fuels.
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Old 05-12-2011, 12:04 PM
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nope, i wondered about that myself. nothing even remotely noticeable.

your not talking about still using your stock pump are you?
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Old 05-20-2011, 06:10 AM
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I have both my pumps hooked up to a 3 position switch. Up is Veg, middle is OFF, and down is Diesel.

Then there are CV's in the engine valley, I don't get ANY lag what so ever.
My stock tank selector is now just a decoration piece.
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Old 05-20-2011, 06:34 AM
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^ thats exactly my setup. no lag here either.
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Old 05-20-2011, 07:30 PM
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how are you guys flushing/purging the veggie oil with this set up. Im about to double down on my system also real soon. Im using a FASS pump for both sides but for another 200$ in materials im thinking of replacing all of my lines and doing dual pumps since I just hit 10k miles on veg and its celebration time.
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Old 05-21-2011, 07:53 AM
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I only purge the components in the engine valley. When I switch to D2 I open a solenoid and flush every thing in the heads and fphe back into the WVO tank.
I don't purge my vo pump or TIH
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Old 05-21-2011, 07:58 AM
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does the solenoid bypass the vo pump? So this solenoid is energized open on vo and then it closes on D2?
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Old 05-21-2011, 09:18 AM
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The solenoid when energized creates a looped return on the wvo side. The return flow of wvo tees into the supply for the wvo pump.

When de energized the fuel hits the ball valve on the d2 return. So if I ever need to return fuel on the d2 side I have to open the ball valve.

Both my pumps are self regulating with their own returns. So I can safely operate in a dead head style, or regulated return for either fuel source.

I like choice.
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