1990 7.3 IDI WVO Conversion Project
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?
Iíve 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!
Diagrams in my WVO photo album
Diesel Forum - TheDieselStop.com - osufireman's Album: WVO Conversion
1990 F250 XLT Lariat, 4x4, E4OD, 4.10 rear, Twin Traction Beam, NA 7.3L IDI. 225K miles