Join Date: Jul 2006
Location: Tuttle, OK
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So many misconceptions still around about this subject.
The fass fuel pump on the V3 could pump gravel uphill so the viscosity of the oil will not effect this pump.
The temp of the tank has nothing to do with switchiver times either and ambiet outdoor temps do infact play a role in this. If you motor and coolant is 20 degrees with you start up, it will take longer to switch over because the temp switch is located inline with the coolant and when the coolant hits 140*, the system switchs on.
This hot coolant will heat the V3 module thus heating the vegi flowing through it. There are 4 heat exchangers in the V3 system. The first being the heated tank. The tank heat will never reach 140 except maybe in the summer on a long trip. In theory the tank is your first heat bump...lets say it heats the oil 15 degrees above ambient temps outside. so its 90* rather than 75 when it gets picked up in the fuel line. It then travels along the heated HOH which esentially keeps it hot and maybe heats it a little more untill it flows through the module which is heat exchanger # 2 and that bumps it another 20* to 110* (these numbers are hypothetical as i have never tested temps along the lines). Then the oil goes through the heated filter and bumps anotehr 20* to 130* Now the oil will enter the fuel rail in the head and become heated to over 200* in seconds before it gets injected.
IF you omit the heated tank, take 15* off of this process so the oil maybe only 115 when it reaches the heads and it will still get heated in the rails.
In winter the ambient temps. sets the starting point for this process so you can see if your startingout with 20* oil, you NEED heat in the tank. If you live in Panima City and you start out with 90* oil everyday all year long, you do not need tank heat at all.
No matter where you live, if you vacation to 10,000 feet above see level in the mountains in august you will not be able to use your system.
Get the heated tank.
2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel
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