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  #1  
Old 10-05-2004, 12:27 AM
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WVO pumps and fuel lines?

Okay WVO users, what material are you using for your fuel lines? HOH or HIH design? What ID hose for fuel and coolant lines? What kind of boost pump and how is it setup? I am looking to build a fairly complex and heavy duty system that has to be totally reliable and functional in subzero temps. My concerns are durability of rubber fuel lines and boost pump lifespan. I have cruised the BD/WVO sites and also have danalinscotts plans but still have unresolved issues. Thanks, RT
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  #2  
Old 10-05-2004, 11:00 AM
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I am using a Holley Blue electric fuel pump as my WVO pusher pump. but find that using cold oil the pump does not pump. Once the oil has been heated, it pumps fine.

I have a pressure/vacuum gauge at the fuel line to the IP.
The MB lift pump provides ~14psi on biodiesel/WVO blend.

I am using one of these to pump biodiesel from a 12 gallon drum, and it pumps ~20 litres/minute thru a 3/8" bore, 3' long pipe with a plastic inline fuel filter in the 1/2" suction line.
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Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine.
Josephine '82 300D 390kkm White/Palamino int.
Elizabeth '81 280E, sporting a '79 300D engine.
Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior


Various parts cars including 280E, 230C & 300D in various states of disassembly.
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  #3  
Old 10-05-2004, 10:11 PM
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Thanks Tony, good info. Now what are you guys running for fuel and coolant lines and how are you hooking it up? RT
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  #4  
Old 10-06-2004, 08:29 AM
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I believe that part of my problem with fuel pressure is that I am using OE fuel line for the WVO. If I run a 3/8" or 1/2" fuel line I feel that I will have much more pressure without even heating the oil.
I have made HIH using a rigid nylon tubing inside 5/8" coolant hose, using brass compression fittings.
HINT: To allow the fuel line to pass thru the compression fitting which is used to seal the outlet of the HIH, drill out the compression fitting (usually a double ended male fitting) so that the fuel line can pass right thru it, and still allow the compression fitting to seal.
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Tony from West Oz.
Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine.
Josephine '82 300D 390kkm White/Palamino int.
Elizabeth '81 280E, sporting a '79 300D engine.
Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior


Various parts cars including 280E, 230C & 300D in various states of disassembly.

Last edited by TonyFromWestOz; 10-06-2004 at 08:34 AM.
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  #5  
Old 10-06-2004, 12:36 PM
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RW, I'm using 5/8" heater hose for the coolant lines to the WVO tank. Nothing fancy. WVO fuel line is just 3/8" OD poly tube inside one of the heater hoses - same deal as original greasel setup and that shown in "from the fryer to the fuel tank". The '84 300D has had this setup, with a 12 gallon tank in the trunk, for about 2 years. I did not install and still a WVO fuel pump/boost pump. The stock lift pump has been sufficient, even though I'm pulling WVO through a benz pre-filter and a (heated) fuel filter ('85 Golf diesel filter with copper tubing wrapped around so hot coolant heats the filter). I did not change the stock lift pump/filter arrangement, so WVO goes through pre filter/VW filter, and then through lift pump and stock filter. No problems to date. I've run on WVO at outside temps to -15F in upstate NY...just have to let everything heat up first and suck that first bit of cold WVO (in fuel line from heated filter through selector valve to lift pump.). I'm about to convert my '83 SD and just for heck of it will install an electric fuel pump at the WVO tank with a separate switch so I don't need to run it all the time. In my case, I've found that filtering the WVO very well before it gets to the car is the key.

Good luck!

Fred
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  #6  
Old 10-06-2004, 04:29 PM
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My WVO supply hoses are 3/8" for the supply, 1/4" for the return. Braided vinyl tubing. I have no heating system. Of course I've also not done this over the winter yet. We'll see if heating will be necessary in a few months.
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  #7  
Old 10-06-2004, 06:01 PM
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My factory fuel system has been upgraded to deal with B100. Viton flexible parts, no replacement for the "cigar hose" yet.

The SVO system I designed consists of 3/8" fuel line (regular old nitrile), a 4' heat exchanger (circulating engine coolant) under the car, a glow-plug inline fuel heater, and a Permacool diesel fuel filter (2 micron). When running SVO I loop the return line to conserve heat.
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  #8  
Old 10-06-2004, 10:47 PM
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information on wvo available at www.greasecar.com/forum/general discussion or tech thread. also check out the archieves. find me as wannabe.
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  #9  
Old 10-07-2004, 04:03 PM
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I'm using 3/8ths poly line to the heated filter and 5/16ths rubber fuel line to the solenoids nestled in between my 5/8ths coolant hoses. I found that my braided vinyl line kinked to easily and plain vinyl line collapses under the suction. Having clear line here and there is good to see if you have air in your system.

I use a facet-purolator universal electric fuel pump ($30 or so at Napa) to help push the fuel. The little solid state pump also generates some good heat for the grease before it hits the filter.
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  #10  
Old 10-06-2006, 06:57 AM
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Fitted Supply Fuel Hose Change

When changing out the old rubber fuel lines in my '83 240 D with Viton hoses-- I came to the supply hose that conects to the tank underneath the car. What do you all recommend doing about replacing the fitted line when changing to synthetic lines?

dandelion
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  #11  
Old 10-06-2006, 08:08 AM
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Quote:
Originally Posted by Old300D View Post
My factory fuel system has been upgraded to deal with B100. Viton flexible parts, no replacement for the "cigar hose" yet.

I am using thick wall silicone tubing from McMaster for my BD compatable cigar hose replacement. I did use Fuel Injection type hose clamps rather than regular hose clamps since the material is so soft.
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'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
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  #12  
Old 10-06-2006, 08:48 AM
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Quote:
Originally Posted by dandelion View Post
When changing out the old rubber fuel lines in my '83 240 D with Viton hoses-- I came to the supply hose that conects to the tank underneath the car. What do you all recommend doing about replacing the fitted line when changing to synthetic lines?

dandelion
I ran into same problem and have thought about taking my viton hose to a place that makes hydraulic hoses. Sound like a good idea?

Cheers,

Bill
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  #13  
Old 10-06-2006, 09:01 AM
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Quote:
Originally Posted by dandelion View Post
When changing out the old rubber fuel lines in my '83 240 D with Viton hoses-- I came to the supply hose that conects to the tank underneath the car. What do you all recommend doing about replacing the fitted line when changing to synthetic lines?

dandelion
Quote:
Originally Posted by bill murrow View Post
I ran into same problem and have thought about taking my viton hose to a place that makes hydraulic hoses. Sound like a good idea?

Cheers,

Bill

Bill,
Thanks for the advice. With all the folks doing synthetic fuel line 'makeovers'- I wonder what the easiest route is. I'd be interested in knowing where you found hydraulic hoses made.

thank again for the help,
dandelion
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  #14  
Old 10-06-2006, 09:17 AM
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Quote:
Originally Posted by dandelion View Post
Bill,
Thanks for the advice. With all the folks doing synthetic fuel line 'makeovers'- I wonder what the easiest route is. I'd be interested in knowing where you found hydraulic hoses made.

thank again for the help,
dandelion
My local [well stocked!] hardware store makes them. I haven't done this myself yet but came up with the idea and don't see why it wouldn't work. Thats all it basically is.....a hydraulic type male thread.

Cheers,

Bill
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  #15  
Old 10-06-2006, 10:39 AM
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Quote:
Originally Posted by rwthomas1 View Post
Okay WVO users, what material are you using for your fuel lines? HOH or HIH design? What ID hose for fuel and coolant lines? What kind of boost pump and how is it setup? I am looking to build a fairly complex and heavy duty system that has to be totally reliable and functional in subzero temps. My concerns are durability of rubber fuel lines and boost pump lifespan. I have cruised the BD/WVO sites and also have danalinscotts plans but still have unresolved issues. Thanks, RT
I used viton on the first car, but on 2nd car I have close to 20,000 miles on SVO using same OE (new) hoses with no problems I read somewhere SVO or WVO wonít degrade rubber like bio-diesel so letís see how long they last, the boost pump is from NAPA on the first car still working also on the second car I will look for the stock number and post it later.
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