1990 7.3 IDI WVO Conversion Project

[osufireman]

I have a 1990 7.3l IDI that I am finally getting around to working on a WVO conversion for. This will be a slow process due to funds right not, however I am trying to plan as much as possible and document it all for others to use as a resource. After some researching I do have some initial questions to throw out there.
· I am trying to minimize purge time as much as possible by only adding WVO to the diesel system at the manual fuel pump and removing it from the system just after the injectors on the return line.
o How have people negotiated the stock fuel filter? I would like to avoid having WVO enter it but it looks like I will have to have 2 additional switching valves to accomplish this.
o Is it best to just skip the lift pump and use a sufficient electric pump to supply the IP? Which pumps seem to work best? How does one recycle the diesel to the return line to the tanks since the lift pump is running as the engine turns?
· I want to use a Hose-in-Hose heating system on the supply line.
o Is a H-i-H required for the return line as well? Or is this just to be assured all of the WVO is heated properly?
o Should rubber fuel hose be used or aluminum tubing? I understand copper is a no-no from my reading.
· Plate Heat Exchangers? Should I have a plate heat exchanger in addition to the H-i-H or will the H-i-H give sufficient heating to the WVO?
· If I use the stock fuel tank as a WVO tank, is the stock 6-way switching valve sufficient for WVO or should I upgrade/utilize 3-way valves to keep the WVO/D2 completely separate?
I’ve attached some basic drawings I was working on today for my system. This plan involves a 3rd tank in the pickup bed for the WVO but I will work up something for using the stock rear tank as well.
Thanks for any help and insight!
Brandon

Diagrams in my WVO photo album
Diesel Forum - TheDieselStop.com - osufireman's Album: WVO Conversion

[theindianabricklayer]

Hello
I have asked the same questions. I got the same responce.
I have gatered up most of the componets. My thoughs are a three tank system. I have planed to install aux fuel filers before the lift pump one the diesel side and the wvo side . So filter/3 way/lift pump. My thoughts are to rumove the stock filer. I have a idea of placing a purge valve close to the Ip. So lift pump/inline heater(flat plate or elec)/purge valve/IP. Im not sure on the return. Do we loop the return back to the supply side?

I have a 15 gal plactic racing tank and will make my own Hot spot using 1/2 alum tubing.
I will also try a electric fuel filer heater. We need to get as close to 140deg before the pump and 160deg after.I'm just not sure how to accomplish this so I may just have to live with 160 befor Pump.
i would like to hear your toughts.
I just don't have alot of time. I do how ever make my own Bio. So I have no great need to jump on the system.However I think the system would be convenance.
Thanks
The indiana brick layer