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I am tired of the high diesel prices and I am going to try to convert one tank to WVO but I just don't understand the plumbing of it. the picture on Greasel is not to good does anyone have a good picture of the plumbing with solenoid and 3 way valve? I am going to make my own tank heater and bundled hoses.I am just confused about the bypass going back to tank and where the fuel lines go to
Tony
 

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I made my own bundled hose from 2" to 1" heat shrink tubing that I bought from McMaster-Carr and it came out very nice. I bought a 25' roll as well as a 50' roll of 5/8 heater hose and 25' of 5/16 fuel line. (I needed 22') You can buy as much of the heat shrink as you need, they sell it by the foot.
 

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I don't know of a schematic available, which is a bummer. I think better when I can look at a map first.

A couple of guys have given reports on how they plumbed their trucks... search for them in this forum for tons of information. In essence, you are creating a by-pass loop of coolant to go through some sort of heating coil in the veggie tank and running beside the fuel line in order to heat the veggie prior to burning.

As for the valving, most put a solenoid/valve between the diesel tank and the lift pump. That way you can choose whether the lift pump pulls out of the veggie tank or the diesel tank. I'm planning on adding a pump on the veggie tank to help with the increased viscosity.

As for the return, I'm still unsure as to how the PSD is plumbed. Does the return line go to the tank or is it deadheaded in the engine? Some use a 6 port solenoid so that when on diesel the return diesel goes back to the tank and when on veggie the return veggie goes back into the fuel lines heading toward the engine. The idea here is to keep circulating the same oil so it will get hotter.

I'm thinking of returning the surplus veggie back to that tank just as we return the surplus diesel. Opinions wise diesel fans?

I look forward to reading replies to your question as I'm still learning too.

Todd
 

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Discussion Starter #4
Todd,
i just called greasel and they said they are using a 6 port valve now and that they are updating the web site to have better instructions.Also i am 99% sure the return goes back to the tank.I guess thats why they are using the 6 port valve now.
Tony
 

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Love the idea and parts list to make the bundled tube! I've done about 10 drawings trying to figure out I want to run the lines. I just rolled under my 96 F250 tonight and found a 6 port valve working a feed and return from the engien and a set of lines to each tank.

Some one brought up on a similar thread I posted that if your run duel returns every time you swich you'll get some fuel from one tank into the other. I want to try and keep from doing that so I'm trying to work out how to run a supply and return when I'm on Diesel, a loop when I'm on veggie, and a way to switch the veggie feed to a return so I can run diesel at shutdown for just a few seconds and have it push the veggie back out of the system. If I come up with a reasonable way to do this I'll draw it out real nice and post it. If someone else aready has I would love to know, as I'm betting Fordlover would...
 

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Hi I found a good website by Dana Linscot that has some very good diagrams and other veggie conversion info, go to vegoilconversions.netfirms.com, hope this helps. I am working on a veggie conversion for my 88 F250 using a 50 gallon greasel tank and a heated racor filter. Using the greasel fuel line also, unsure myself on line routing, looping return line or?

Porscheman87
 

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The only way I could think of that would be to have two 3-port switches, one for switching fuel input, one for switching fuel return. Then you can switch the return a minute or so after switching the fuel input.

I wanted to run my veggie return back to my tank to help in heating the tank itself.

Another option: I have seen a good picture on www.greasel.com that uses a manual Tee on the return line. Normally, the return goes back into the fuel input after the filter and lift pump. If you run out of fuel or get an air bubble, you switch the Tee connection and the return goes back to the dino tank.

Mike
 

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Mike, don't they offer an in-tank heater?
This thread is 12 years old!

Greasel is long gone and many things about the way we do veggie conversions has evolved since then.

Heating the whole veggie tank is inefficient and generally a bad idea. We really just want to heat the fuel in the tank enough to get it out, then get the heat we need from the rest of the system. I prefer a heated fuel pick-up like the Hot Fox, then a 'looped return' in heated fuel lines (Tube-In-Hose) with a heated fuel filter.

On the PSD's, we use redundant fuel systems and separate the fuels with simple check valves. We switch fuels by turning the VO pump on and the D2 pump off and vice versa. For the looped return, I send the 'return' fuel from fuel pressure regulator back to just before tank where it is tee'd into the suction line (instead of dumping it in the tank). There is a separate 'purge' line for removing air and expeditious removal of VO from the engine when you switch back to D2.

For the IDI's and other IP-equipped engines, I prefer to use (3) 3-port switching valves. The first valve selects which tank the fuel is coming from, the 2nd valve selects which tank fuel is returned to and the 3rd valve is on the veggie return line - it chooses return to tank (for purging) or return to suction line (creating a 'looped return'). If the 3rd valve is back at the tank and the fuel lines are all TIH, we don't even need a FPHE in the system!

Wvo and svo diesel to vegetable oil conversion kit | Veggie Garage has the best parts to build a system for a 7.3/6.0 PSD ('94-07) - including the best options for e-fuel conversion on the OBS trucks.

I do custom VO conversions and diesel engine swaps here in N. GA for folks all over north America. Most of my conversions lately are 7.3/6.0 PSD's - but I can make nearly any diesel run (reliably!!) on VO. In my spare time, I am working on a WVO system for the 6.7 PSD/6.7 Cummins and swapping Mercedes 5cyl turbo diesels into Jeep vehicles.
 
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