So I've been reading a lot of threads, and know I have a lot more to learn. I know what I need to do to filter the oil, and will likely try and build my own centrifuge, but that's another story. I have some specific questions. I know it's asking a lot, but there are so many threads to read, and not a lot of step-by-step overviews of conversions. Maybe y'all can point me to specific threads to read??
1. Before discussing which one to use, I'm thinking about putting the auxiliary fuel heater along the frame rail, underneath the truck. Is this what most people do?? Maybe I'm wrong; shouldn't it be as close to the fuel tank as possible?
2. I'm thinking about using the front tank for WVO, only because the shorter length of fuel line involved, and distance from the water pump. I'd have to run so much more coolant line to the inline heater, and would have more trouble fitting it in.I know it's a smaller tank, but I'm just thinking ease of installation; maybe I'm gonna kick myself later. I just worry about the few feet of potentially unheated fuel in the fuel line between the tank and the pollak switching valve. I've seen obviously homemade wrap-around coils to go on your fuel line, but don't want to run more electric lines and relays if I don't have to. I'm already going to be running at least one.
3.I've been looking at a few different designs for add-on inline dual heated (12v and engine coolant), with supplemental filter cartridges. I'm looking hardest at these two, but leaning towards the second one:
Coolant 12V Heated Twin Spin on Filter WVO SVO Diesel Biodiesel Vegestable Oil | eBay
Coolant 12V Heated Pre Filter WVO Diesel Biodiesel Diesel Water Animal Fat Trap | eBay
It seems that with the combination of 12v heat when necessary and engine coolant would lessen the warm-up time required on petro-diesel. Assuming I filter the heck out of it before putting it in the tank, is there really a need for a supplemental filter, or would the all-in-one-cylinder "separator" style one work alright? It would seem that the first one has the 12v source before the coolant source--this wouldn't help me much at all on really cold days, but it has two in-line filter cartridges. I'm worried about that causing too much restriction if it's on the suction side of the pump.
4. How much purge time do you have to allow to clear the wvo from the fuel bowl?? I know that if I've been running wvo into the fuel bowl for any length of time, it will be just about 100% veg. oil in there. I realize that there will be a bit of cross-contamination by way of veggie oil going into the return line, but if I keep the petro-diesel tank full, shouldn't the percentage should be small enough?? Eventually I'd love to either convert the system to an electric pump with no return, but that's not easy or cheap. I know there can be problems if you shut down the engine with a fuel bowl full of waste veggie oil on a cold day--it'll gel up and not start again when cold. How many of you run without regulating this return feed of veg oil to the pump? --I'm asking because I can't seem to find out the %of return for the factory mechanical lift pump. I'd like to know how much roughly the engine is using at idle, and how much the lift pump is returning to the tank. My first thought to combat this is to either beef up the stock fuel bowl heater, or retrofit one that could be plugged into 110v current while the truck is sitting. That still wouldn't take care of what was in the fuel rails, however. Any thoughts??