Plantoil/diesel conversion basics
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legasea

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Posts: 8
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Hello, I have been reading all about WVO conversions for months, recently built a home filtration kit, purchased a 1983 300D Turbo, contracted with my local Japanese restaurant (80 gallons month - great oil) and was about to buy either a Greasecar or Frybrid kit. There were pros and cons to each kit so I decided to buy parts to custom build my own kit. I live in the New Jersey.

So, I bought all my parts from PlantDrive.com and have been working closely with Craig over there, very patient and knowledgeable man indeed. I drafted up a proposed design that I would like feedback on. I will attach the image. Although you can't see it in the diagram, the Vegtherm will be wired to the switch so that it is only providing heat when on veg oil.

The parts I purchased are:
  • Trekker 20 Gallon Tank with aluminum coolant heated Heat Exchanger
  • VegMax Coolant heated oil filter
  • (2) 3-port High Flow Hydraforce SV010 solenoid valves
  • 16 Plate Heat Exchanger
  • Vegtherm Standard with wiring kit and heat sensor
  • Switch, Forget-to-Purge Buzzer & some fittings
Items I still need to purchase are HOH bundle, oil temp and pressure gauges, some additional fittings and possibly an additional valve for unlooping return.

Questions:
1.) I would love to hear feedback on my proposed designed. The more the better.
2.) Question about looped return...is it in the correct location or should it be after the supply valve?
3.) IMPORTANT - Do I need to plug the banjo bolt on top of the spin-on fuel filter? I read others doing this but was not clear why.
4.) With this looped return setup and (2) valves, how does one effectively purge the system? Simply flip the switch back to diesel?
5.) Does anyone recommend a 3rd valve to unloop return (solenoid or manual?)

Any advise is greatly appreciated. This is my first draft. An additional diagram will include plumbing for the coolant lines....to be continued!

Thank you!
danalinscott

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Posts: 934
Reply with quote  #2 
Great diagram..very clear.

My initial  suggestions to improve the design are:
1.Sell the Vegtherm...it won't add enough heat to the fuel to be worth the cost and in this particular configuration it creates another possible air leak point as well as the possibility that you might possibly create a slug of very hot fuel that might damage the stock fuel pump.

That cash could be spend on more effective post IP fuel heating.

2. Relocate the heated filter to "after" the FPHE.

3. Add an in-line "chunk catcher" filter "after" the stock lift pump to protect the IP and act as a sight glass to see any air bubbles. This helps immensely with troubleshooting air leaks (the most common bug in configurations that "suck" fuel through a filter rather than "push" it).



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Dana danalinscott@yahoo.com
legasea

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Posts: 8
Reply with quote  #3 
I assumed the FPHE will put out higher temps than the vegmax filter.  Is that not true?
Another question....what are my other options of post IP heat other than injection line heaters?  And what type of draw do the ILH put on the alternator?  I think I have 55 amp stock alternator.

danalinscott

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Quote:
Originally Posted by legasea
I assumed the FPHE will put out higher temps than the vegmax filter.  Is that not true?
Another question....what are my other options of post IP heat other than injection line heaters?  And what type of draw do the ILH put on the alternator?  I think I have 55 amp stock alternator.


Yes ..even a small FPHE will put out more BTUs than the Vegmax. But in cold weather to with high fat/hydrogenated wvo the Vegmax will probably clog due to the wvo being too thick. This will cause the vacuum in the line between it and the IP to rise and create air leaks that are not present other wise. Heating the VO to a higher temp prior to the VM will prevent this.

Quote:
what are my other options of post IP heat other than injection line heaters

There are units available in Europe that heat the injectors themselves. Line heaters are the best option IMO.

They draw from 1 to 3 amps per unit depending on the which "brand" you buy.

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Dana danalinscott@yahoo.com
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