Yeah I wouldn’t be concerned with cross contamination either, but what I meant is, isn’t there a lift pump or something that gets the fuel from the tank to the injection pump? With the diesel fuel not being used, what does the pump do?
The lifter pump is attached to the injector pump. The lifter pump would be moving veggie oil or diesel fuel depending what position the valve is in.
Ok that’s confusing to me, can you do a rundown of all the filters needed, along with the price. I understand that, the method you use (& I plan to also) filters the oil as its being collected, but how many times and with what kind of filters is it filtered between the tank and engine?
From grease dumpster to dirty veggie oil tank, only a screen is used on the inlet of my pump.
From dirty veggie tank to clean tank, oil is pumped through 3 water filters, 20, 10, 5 micron (I think...i might have used 20 20 10, can't remember) I use the 20 micron filters to clean the water in the jacuzzi. If it can turn that water from looking like the mississippi river to sparkling clean, i think it's good enough for veggie oil.
From the clean tank, it should go through an electric fuel pump 3-5 psi, then through a regular diesel fuel filter, then off to the engine. Most of the fuel will not be used in the engine, but will be returned to the veggie tank via the return line. This return action will send the wvo through the regular diesel fuel filter over and over again, creating sparkling clean wvo in your tank.
As far as one huge tank.....
How about a large dirty veggie oil tank, and a smaller clean veggie tank? You could fill the large tank ultra fast (15 or 20 gallons per minute) then as that tank gets heated, you can filter oil slowly into the clean tank. Maybe @ 1-5 gpm. You would hate to drive around for an hour on diesel before you switch over to veggie. It woudn't be terrible on a long trip, but that wouldn't benefit you much for around town driving.
That's a very good point you make about me not having large enough veggie oil capacity.