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Old 11-08-2005, 08:14 PM   #11
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Originally Posted by lapeer20m
I just use regular house water filters for my oil. They stand up to hot oil just fine. Home depot sells the housings for about 15 bucks, the filter elements are about $2.50 each
It's the housings that I was worried about. Didn't know if they would take the heat without degrading/melting. I'd like to have the clear ones so I could see the filters.

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WHAT ENGINE IS IN YOUR BUS?
Oh, it's a manly engine! 9 liters of muffin loving International Harvester power. IHC 9.0L 8 cylinder. No turbo.

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If you have free electricity then heating the tank with an electric heating element is a fine idea. The hot water heating element sounds like a good plan to me. The elements are under $10.00 at home depot, thermostats are not much more $$$
Also, if I ever get around to getting a little portable generator, I could use it to heat the oil up if I'm not hooked to shore power (not a very efficient way of heating something -- burn gas - make electricity -- make resistance -- but it would work for occasional use).

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As far as switching between wvo and diesel, i wouldn't worry about the extremely minimal amount of wvo that ends up in the diesel tank. You can add a few gallons of wvo to any tank of diesel without any modification. It won't hurt anything. Too much wvo would make the diesel gell at a higher temperature, but i think it would take more than a couple gallons mixed in to be noticable. There is a lot of #1 diesel mixed into our regular #2 in the winter to keep fuel from gelling. #1 diesel is pretty much just keroseine.
That sounds promising. It sure would simplify things. I'm estimating that no more than 8 ounces of WVO would get transferred to the diesel tank at switchover, but switching over multiple times would make that add up after a while. I need to do better calculations on the volume of WVO that would be put into the diesel tank at switchover.
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Old 11-09-2005, 10:39 AM   #12
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i posted some veggie stuff today and assumed it was on this thread...but i guess i was actually on a different thread....

here's a link to the other page

http://www.skoolie.net/forum/viewtop...t=766&start=30


I'll try to keep my veggie ideas on this thread in the future
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Old 11-10-2005, 09:24 AM   #13
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Thanks, Lapeer, I saw them on the Toyhauler thread.

I have to go out of town for Mock Trial competition to Murfreesboro, TN, this weekend, so I'm not going to get anything done on the WVO conversion except to finish painting the tank and its supports one more time. I don't know if they will be visible at all, but they sure will be a pretty IH red! I probably could have gotten by without painting them, but I wanted to take care of the minor rust before it got any worse, and I just HATE crawling around under a vehicle and trying to handle and install filthy parts -- the work is hard enough without having to get tools and clothes and hands all gunked up with old road grime if you don't absolutely have to. At least this way I won't be getting dirt and grunge in my face (from the tank and its mounts) while I'm trying to do the installation.
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Old 11-10-2005, 11:51 AM   #14
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One more thing to consider is what to do with the return line.....

there two options, and I'm not sure which one is best.

option 1: have separate return lines for diesel and veggie that returns the fuel to it's respective tank.

Advantages:
Oil is constantly circulated, thus heating the oil in the tank faster, and filtering the oil several times prior to entering the engine. I would guess from my observations that for every gallon of fuel burned, 9 gallons of fuel is returned to the tank. Oil going towards the tank is always hotter than oil going towards the IP
Air in the fuel line is bled automatically as fuel is returned to the tank. (a lot of air in the fuel line may still require you to bleed an injector)


Disadvantages: higher pressure than stock in the return line can cause injector pump damage.



option2: Cut the return line, and have it "T" back into the fuel line going in to the injector pump. This seems to be the method used most often in veggie systems i've looked at.

Advantages:
Less fuel line to run

lower pressure in the return line

supplemental electric (or other heat) raises the temp. of oil higher than the other option since the oil is moving through the tubing about 10 times slower.

no possibility of wvo mixed into diesel

Would it be safe to assume that filters last longer? since far less oil is circulated through the filter?

Disadvantages:
Air in the fuel line is a HUGE headache to get rid of and can plague the engine (and operator) for long periods of time.

Manufacturers always run return lines to the tank leading me to believe that there is a good reason to have a return line

I've tried both methods, and had poor luck with cutting the return line. I think that large diameter fuel line should be used for the veggie return line. At least 3/8" ID if not bigger. This will help reduce the pressure on the injector pump.

One more thing to consider .....
if you use an aux fuel pump, make sure it does not apply more than 5-7 pounds of pressure to the fuel line. High pressure fuel pumps will cause injector pump issues. I know this first hand. After about 1,000 gallons of wvo being forced into the IP @ 50psi, a rubber O ring ruptured inside the Injector Pump causing diesel fuel to drain into the crankcase.
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Old 11-10-2005, 07:27 PM   #15
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http://www.frybrid.com/forum/ is another forum that seems to have a lot of ideas for WVO, one is to add salt and bakeing soda to your wvo, the salt draws out the water and the bakeing soda cleans up the oil. I haven't fully tried this as I don't have a deisel just yet but getting ones def in the plans *S* got to love being able to drive around for free, and as I'm a cook getting oil is just a matter of takeing it home from work.
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Old 11-11-2005, 01:47 AM   #16
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Anybody ever used that super absorbant gell to get the water out of oil. Diapers are full of the stuff with a little bit of ground up paper. I took one small diaper apart and was able to absorb 12oz of water. When I have the time I will try mixing some oil with water and see if the gell will absorb the water.
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Old 11-25-2005, 11:48 PM   #17
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I was reading over a thread on another bus group today and somebody mentioned a filter that is designed for alternative fuels. It works with bio diesel and WVO/SVO. It also has a built in heater that uses the hot engine coolant. I have no idea how much it costs but when the time comes I might look at it. They did not mention if using this filter would eliminate the need for a heated tank.

http://www.davcotec.com/model234.htm
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Old 11-26-2005, 09:20 AM   #18
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Quote:
Originally Posted by busone
They did not mention if using this filter would eliminate the need for a heated tank.

http://www.davcotec.com/model234.htm

All successful wvo conversions i've seen utilize a heated tank, even when using a heated filter.

It takes a lot of energy to heat veggie oil to 120 or 140 degrees, especially when the heat is coming from engine coolant that is only about 180 degrees. Time is the important factor.
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Old 11-26-2005, 11:31 AM   #19
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What is a "WVO" ????
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Old 11-26-2005, 11:52 AM   #20
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What is a "WVO" ????
Waste Vegetable Oil
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