[Vwdiesel] Waste Vegetable Oil

Terry Briggs vbriggs at stny.rr.com
Mon Apr 2 22:09:50 EDT 2007

very good advice.  Would a heated filter from a diesel toyota camry 
work ? I have one, but have never used it.  How would you suggest 
heating injector lines, if thats really needed that is.  Lots of 
questions, so little time.
On Apr 2, 2007, at 5:10 PM, Rolf Pechukas wrote:

>> I have done some research on running waste vegetable oil &
>> apparently there are two schools of thought.  One is to start on
>> regular or biodiesel running the engine's heat thru a secondary
>> heater or heat exchanger in the WVO fuel tank. This requires two
>> separate fuel tanks. With this setup. With this setup, you must
>> switch back to regular diesel to purge the fuel lines & injector
>> pump of WVO, before shutting down. The other setup employs a
>> electrically heated fuel filter & heat tape along the fuel line
>> from the filter to the injection pump & from the IP to the
>> injectors. This permits running your car on only WVO.
>> I would like to hear comments on how well the second option of
>> electrically heating the WVO works. From what I have read, the
>> Mercedes 300 diesels from 1979 to 1985 are the best for this second
>> type of option.
> caution on running WVO
> it is not as simple as one might think
> there are a finite number of things that must be done right, but you
> have to do them all right or you may damage your IP, injectors, and/
> or engine
> there is no way to run 100% WVO heating electrically w/o purging
> injectors
> this will not work
> it IS possible to run a single-tank system - but this involves
> swapping out injectors and sometimes IP for special veggie-specific
> models, generally made by Ellsbett of Germany
> it IS possible to use electric heat in conjunction with, or instead
> of, coolant heat, but that doesn't get you out of having to switch
> over to DSL fuel and purging
> in single-tank (i.e. Ellsbett) conversions, WVO is generally blended
> in some percentage with DSL fuel
> some people run a single-tank w/o modifying injectors or IP
> they typically run a blend of WVO and DSL or WVO and RUG (Regular
> Unleaded Gasoline)
> a lot of this depends on how warm it is where you live
> in FLorida a lot of people run single-tank blends
> in Minnesota almost no one does
> earlier Mercedes ARE especially tolerant of WVO
> this is because they have inline IPs
> VWs are rotary, but they do pretty well also
> the Lucas/CAV types are very fragile running WVO (Dodge? Ford? not
> too familiar w/ these)
> but to run WVO successfully and long-term trouble-free in 90% of the
> US you'll want a 2-tank system
> it is entirely possible to design and build your own conversion - you
> do not have to buy a kit
> but you do have to know what you are trying to do
> for example, heating just the VO tank is inadequate
> in fact, you don't need much heat to the tank itself
> just enough to keep it liquid
> you need a little more heat to lines running from tank to eng bay,
> even more heat at the filter and before the IP, and, if possible,
> even more heat at the injector lines right before the injectors
> this is not rocket science, but it is WVO conversion science
> anyone dedicated to doing it properly with a decent set of skills and
> tools can do this, but expect it to take a while to get right (i.e. a
> year or so to work out every last little kink and get it running
> really right)
> OR, you can just pour a little PROPERLY FILTERED AND DEWATERED WVO in
> with your DSL
> but not more than 20%, and then only in the summer (unless you live
> somewhere hot)
> 5% max in the winter
> my 2¢
> peace out
> Rolf in MA
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel
Third Wheel engineering
Custom Design and Fabrication
2576 King Circle
Corning, New York 14830
Vbriggs at stny.rr.com

More information about the Vwdiesel mailing list