Plantoil/diesel conversion basics
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averell

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Reply with quote  #1 

Dana,
first, thank you for all the useful information you provide.

Second, I am in Los Angeles and am doing a single tank conversion on my 82 240d.  Do you have any schematics for your recommended single tank conversion process?

Third, I am considering using an electric injection line heating element as my initial component, directly on the metal fuel line exiting the tank.  Do you have any thoughts on this?

Fourth, can I plumb my fphe in series?

Fifth, do I need to modify the banjo bolt for a single tank conversion? 

danalinscott

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Reply with quote  #2 
Quote:
Originally Posted by averell
Dana,
first, thank you for all the useful information you provide.

Second, I am in Los Angeles and am doing a single tank conversion on my 82 240d.  Do you have any schematics for your recommended single tank conversion process?


Since I really don't recommend single tank conversions except in rare cases I don't have a conversion configuration. I would be happy to help you develop one though as long as you clearly understand that I believe that most single tank conversions will probably not allow the engine to last as long as two tank conversions...and that the engine must be monitored (using compression tests and lube oil polymerization tests) to ensure that it runs well as long as possible.

Quote:
Third, I am considering using an electric injection line heating element as my initial component, directly on the metal fuel line exiting the tank.  Do you have any thoughts on this?


I think that any heat you add to the vo at that point will be nearly dissipated by the time it reaches the engine bay. And you have a very limited amount of electrical energy that your alternator can provide...so you need to be very efficient at how you use it or you will need to add a higher capacity alternator. If you have a well designed conversion you can probably avoid that.

Quote:
Fourth, can I plumb my fphe in series?

That depends on the conversion configuration...which has yet to be determined.

Quote:
Fifth, do I need to modify the banjo bolt for a single tank conversion? 


No

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Dana danalinscott@yahoo.com
averell

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Reply with quote  #3 

my idea for the injection line heating element exiting the tank was mainly to provide immediate heat for the oil as it leaves the tank in order to preserve the life of my fuel pump.  Would I be better off using a booster pump?  Or am I just overthinking this part of the process?

danalinscott

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Reply with quote  #4 
 The fuel system "choke point" is generally the fuel filter rather than the fuel line. So heating the fuel line at the tank outlet may not be a concern.  Single tank conversions cannot use as wide a variety of WVO fuel as two tank conversions can since the WVO must not have much fat or hydrogenated VO.  Your stock mechanical MB fuel pump is very robust and due to its design should not wear faster even if very thick fuel is being pumped.

I think of more concern in your proposed single tank Mercedes conversion is how you process the wvo you plan to use as fuel and how you add heat to the filter.  If you are planning to use the existing fuel tank you may also need to remove and clean the fuel tank outlet screen. They tend to get partially clogged with long term diesel fuel use and so may be too restricitve when VO fuel is substituted. Some even remvoe the screen entirely and replace it with a cleanable inline mini-filter like the ones shown HERE.

Quote:
Originally Posted by averell

my idea for the injection line heating element exiting the tank was mainly to provide immediate heat for the oil as it leaves the tank in order to preserve the life of my fuel pump.  Would I be better off using a booster pump?  Or am I just overthinking this part of the process?


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Dana danalinscott@yahoo.com
averell

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Reply with quote  #5 
So, here is what I currently have in the works:

I have a clear inline fuelfilter, a Lucas/CAV 12v heated filter, a 16 plate fphe, and a 12v injection line heating element.  My intention is to run the oil through the system as follows: inline filter-Lucas filter-fphe-stock filter(w/yellow jacket)-IP and heated lines. 
My processing station consists of 2 denim socks and a goldenrod 10 micron filter. 
Since I'm in So. Cal., I figure that I can run straight wvo for about 8 or 9 months a year, the other 3 or 4 months I could use a petro or bio diesel mix.

Only question is, will it work?
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