Plantoil/diesel conversion basics
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danalinscott

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Reply with quote  #1 
It is pretty simple to add a heated fuel pickup to a marine out board tank and then mount that tank in the trunk with a long insulated HOH umbilical so it can be removed from the trunk for re-filling. This prevents the inevitable WVO spill from stinking up your car.

Here is a discussion on the various ways to do that.



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saludayaker

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Reply with quote  #2 

I am also looking at ordering your hot rod pickup unit.  My tank is 14" deep, it is this one actually:
http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_90761_225012001_225000000_225012000_225-12-1
Question is, if I use the two top ports(assuming I can open those), maybe the mechanical sight gauge port for the fuel pickup, and the fuel pickup nipple as the return, will that work with your hot rod? I am waiting to hear back from Moeller about the size openings on those ports. I believe you suggested the hot rod be installed horizontally in poly tanks but will this be ok?
How would the hod rod mate with the tank?
Thanks for all your help; you are making this a doable task for someone like me and it is very much appreciated!
 


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saludayaker

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Reply with quote  #3 
danalinscott:

I suggest installing the hotrod horizontally so it works well in cold weather and does not significantly increase polymerization of the VO fuel it holds. Installing it vertically will not alow it to work well whenever the wvo is cool enough to become solid.
 
Installing a HotRod through the loower sidewall of most plastic tanks is pretty simple using a "washer/gasket" sandwich thorugh the tanks wall. Step by step pictures of how to do that  are available.
 
Dana

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saludayaker

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Reply with quote  #4 

Would you recommend putting it lengthwise in the tank or width-wise?  Also, how large are the outputs/inputs for the coolant and fuel? Are there any fittings on the ends or just bare pipe?


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saludayaker

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Reply with quote  #5 
danalinscott:

I would install it lengthwise.
The inputs/outputs for VO and coolant are 3/8" copper pipe.
High quality hose clamps are siggested for securing fuel line (for both VO and coolant) to them. If you are concerned about copper accellerating polymerization I suggest covering the outside with a large diameter heat shrink tube.
 
If yo plan to order a pre-made "HotRod" you will need to provide the desired length and address it is to be sent to for a cost quote.
 
Dana

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saludayaker

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Reply with quote  #6 
danalinscott:

A question...
If this tank is installed in your trunk how do you plan on filling it?
If you cannot add an external filler neck I can guarrentee that you will eventually spill WVO in your trunk and it will stink the whole car up.
 
This is why I usually suggest using six gallon tanks that are on a long enough "umbilical cord" to remove from the trunk and lay on the ground when filling.


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saludayaker

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Reply with quote  #7 
I thought about that and I had made up my mind that I would just put a blanket around and under the tank and clean it when necessary but from the sounds of it that wont be sufficient.  I guess anything from 6 to 7.5 would be good.  I found this one which is 7.5 gallons. I'm guessing a full tank would weigh less than 60 lbs which is manageable for me.  This is the link to the tank.
http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_10205455_225012000_225000000_225012000_225-12-0
All the 6 gallon ones I saw had angled ends which I though wouldn't work with your hotrod.  Let me know which tank you recommend for use with your hotrod.  Perhaps this is the one but I can't see the bottom end to know if it is flat or not. 
http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_52403_225012000_225000000_225012000_225-12-0
I am going to request drawings of the two tanks; I'll let you know what I find.  I appreciate all your help and your looking out.


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saludayaker

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Reply with quote  #8 
danalinscott:

I have found that the tanks with handles seem to be easiest on the back.
I suggest the 6.5 gallon tank which appears to have strait sides into which a HotRod could be easily mounted. I have found that several marine tanks can easily be then stood on end (with the handle up) and will fit under the back window deck of Mercedes.  You may want to measure and test prior to installing the HR so you have this option.
 
Dana


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saludayaker

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Reply with quote  #9 
Do you mean the 6 gallon or the 6.5 gallon? The 6.5 gallon looks to have a sloped bottom end, unless you are talking about the long sides being flat, but then the hot rod would only be going the width of the tank, not the length.
Whatever you think is better, I will go with.  

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saludayaker

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Reply with quote  #10 

danalinscott

Moeller has both 6 and 6.5 gallon tanks which have flat ends//bottoms.
I AM talking about the long sides being flat enough to install a HR in near the bottom back corner. In this way the tank can be used both on its "bottom" and with the end opposite the handle on the bottom and still have the HR mounted near the bottom and horizontally either way.
 

Dana

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saludayaker

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Reply with quote  #11 

danalinscott:

You need to be able to see the point where the HotRod is inserted so you can slip on the washer and nut and tighten it with a long screwdriver through an available tank opening. I have a few pictures I can post that will provide more insight into how the HotRod is installed. It is usually best to have the tank before ordering a HR so you are certain where you are going to install it.
 
I am happy to make up a 12" HR for you but you need to be certain it will fit first. They canno be shortened once fabricated.


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saludayaker

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Reply with quote  #12 

So in your opinion, which one would be the desired layout? I believe no matter which design is chosen, it will be difficult to get a screwdriver and hand in the tank to tighten the screws for the pickup. 
This is the 6.5 gallon option


This is the 6 gallon tank. On this one the hot rod would go into the bottom of the tank so you wouldn't be able to stand it up.


Also, the first link in post #7 is for a 7.5 gallon tank that I think would work well.  It has a little (1.13") recessed square (4.13"x4.13") on either end of the tank which I think would make a nice nook for the ends of the hotrod and hoses.  This may protect the connection in a way. How big is the end of the hotrod where it comes out of the tank?


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danalinscott

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Reply with quote  #13 
Some websites do not allow you to directly link to their images.

I can help you post them if you provide the links to the webpage the tank images are on.

Quote:
How big is the end of the hotrod where it comes out of the tank?
 


The hole is about 1" but you need to leave at lease 3/4" on both sides. You should also leave at least 4" strait out from the hole a HR is installed in to allow for a gentle bend on the hoses that hook up to it.

Quote:
So in your opinion, which one would be the desired layout? I believe no matter which design is chosen, it will be difficult to get a screwdriver and hand in the tank to tighten the screws for the pickup.  
 


Only the screwdriver has to fit thankfully. It is used to hold the nubs on the electrical conduit nut that is used to secure the HR. When possible you should site the hole for the HR where you can see it on the inside through the tank fill port. That way you can shine a bright light through the tank wall and actually see the nubs and screwdriver end. This is much easier than trying to do this by "feel".

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