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- #21
update 08-08-13
Since the re-route my temperatures are over 150F after the truck is warmed up. It's all working well.
The key is to have the FPHE closest to your switching valve. It should be the last step. Another thing I've learned is that coolant heat exchangers give you the biggest gains in temperature by far. Any electrical devices make only marginal gains.
In my case I barely have to wait until the truck is up to operating temp to switch to SVO from dino. When I switch over fuel jumps up to 85-90F and climbs quickly from there. There are no operational hitches--you can't tell it's switched to a different fuel. Seemless.
It's clear there's not much time required for purge either as when I don't purge quite long enough it's slightly harder to start. (that's when having manual glow plugs comes in handy). In this fashion of trial and error I've narrowed it down to 30 secs. or so for my purge line to push the SVO back with diesel. Keep in mind it doesn't move fuel through lines as fast as it burns it. It pushes fuel through that purge line as fast as the pump will pump it. The pumps move fuel at 5-7psi so it ends up being 1/2 a KM of driving or around 30secs driving. When I do this there are no hard starts. You can definitely tell when it's trying to cold start some left over sVO (not good).
It's fun burning free fuel.
Collecting waste oil is defintley a dirty job. I feel pretty grubby climbing through waste dumpsters. It's for all the right reason's though. I don't mind being a dirtball once a week.
Filtering has been pretty good as well. My barrell is insulated and has a 120W pad heater stuck to the bottom. It maintains a temp. of 129F and draws just over 1 amp (I think). I have yet to do a hot pan test but from what I've read it should be pretty dry. It goes like this:
1) The oil sits for a minimum of 2 weeks in a pail.
2) Get dumped through a 10micron bag filter into my barrel. It sits in there for a week or so as I don't consume much fuel overall and have a couple hundred litres in reserve.
3) When I need to fill up I turn on my water pump and it pulls svo from the barrel through a nipple through a 5 micron whole house filter and it's then pushed through a water filter ( I was later told it's not effective to try to filter out water from svo because of emulsification and micelles. Either way it's staying inline for now.)
4) svo then goes through a final 1 micron filter and into my tank..................voi la.
Since the re-route my temperatures are over 150F after the truck is warmed up. It's all working well.
The key is to have the FPHE closest to your switching valve. It should be the last step. Another thing I've learned is that coolant heat exchangers give you the biggest gains in temperature by far. Any electrical devices make only marginal gains.
In my case I barely have to wait until the truck is up to operating temp to switch to SVO from dino. When I switch over fuel jumps up to 85-90F and climbs quickly from there. There are no operational hitches--you can't tell it's switched to a different fuel. Seemless.
It's clear there's not much time required for purge either as when I don't purge quite long enough it's slightly harder to start. (that's when having manual glow plugs comes in handy). In this fashion of trial and error I've narrowed it down to 30 secs. or so for my purge line to push the SVO back with diesel. Keep in mind it doesn't move fuel through lines as fast as it burns it. It pushes fuel through that purge line as fast as the pump will pump it. The pumps move fuel at 5-7psi so it ends up being 1/2 a KM of driving or around 30secs driving. When I do this there are no hard starts. You can definitely tell when it's trying to cold start some left over sVO (not good).
It's fun burning free fuel.
Collecting waste oil is defintley a dirty job. I feel pretty grubby climbing through waste dumpsters. It's for all the right reason's though. I don't mind being a dirtball once a week.
Filtering has been pretty good as well. My barrell is insulated and has a 120W pad heater stuck to the bottom. It maintains a temp. of 129F and draws just over 1 amp (I think). I have yet to do a hot pan test but from what I've read it should be pretty dry. It goes like this:
1) The oil sits for a minimum of 2 weeks in a pail.
2) Get dumped through a 10micron bag filter into my barrel. It sits in there for a week or so as I don't consume much fuel overall and have a couple hundred litres in reserve.
3) When I need to fill up I turn on my water pump and it pulls svo from the barrel through a nipple through a 5 micron whole house filter and it's then pushed through a water filter ( I was later told it's not effective to try to filter out water from svo because of emulsification and micelles. Either way it's staying inline for now.)
4) svo then goes through a final 1 micron filter and into my tank..................voi la.