1982 300sd turbo
Fuel Setup:

25 gal Aluminum tank in trunk, fuel outlet is on bottom

3/8" fuel line leaves the tank, through a small disposable filter and into a facet pump

pump pushes into HIH to front of car
fuel enters coolant wrapped goldenrod filter
fuel enters 26 plate fphe
fuel enters sight glass/filter
fuel enters greasecar 3 port solenoid
fuel to IP
return fuel hits 2nd 3 port solenoid before the banjo bolt - returns to diesel tank on diesel, and loops before filter on veggie...

How does this sound to folks?

Why the facet pump? I do not think its needed and I think the added pressure may cause problems...

If I didn't use the facet pump, how else would the fuel move through the system?

Just the IP?

Also, what about for priming the system after changing filters?

the mb lift pump has no problem pulling the vo on my 83 and 85 mb. prime the filter by filling it before you install it.

I use a Facet boost pump on my PSD system. The disposable fuel filters clog in a matter of miles even with a heat exchanger in the tank.

I now use a standard spin-on automotive oil filter as a screen to protect the Facet pump. Most are 25 to 30 micron, more than sufficient to protect the pump.

Do you have any sort of heat exchanger in the fuel tank? How do you get the oil flowing at all?

Todd

quote:

fuel enters greasecar 3 port solenoid
fuel to IP

Can the greasecar solenoid handle 160*? I know the pollak valves experienced problems at these temperatures. I am going to go with a similar setup with my 2000 TDI, but was going to buy the frybrid valves for the reason above.

quote:

Originally posted by Todd T:
I use a Facet boost pump on my PSD system. The disposable fuel filters clog in a matter of miles even with a heat exchanger in the tank.

I now use a standard spin-on automotive oil filter as a screen to protect the Facet pump. Most are 25 to 30 micron, more than sufficient to protect the pump.

Do you have any sort of heat exchanger in the fuel tank? How do you get the oil flowing at all?

Todd

Todd,
Perhaps you should review your filtering of the vegetable oil before you add fuel to the veggie tank.

I have many thousands of Km on the same fuel filter. When I went to a finer on-board veggie filter (changed due to system reconfiguration), I started having filter plugging issues. I am now starting to filter to 1 micron.

The "throw away" inline fuel filters seem to last quite well with oil filtered to 5 micron before fuelling the vehicle.
My vehicle (Fatmobile) has the stock fuel pump connected to the veggie tank (a Hollety Blue is for the start tank). An inline filter is installed before the stock fuel pump. Apart from when I have hasd the fuel system apart to recoinfigure it, the only time I have considered replacing it is when I have had high MP oils in the veggie tank. Even then, some hot water poured over this filter has rapidly cleared the blockage.

I think the most important issue on vehicle filter clogging is oil temperature. Second most important issue is the presence of hydrogenated oils.

The 'disposable' filters I was talking about are the little inline filters that are only a couple inches long and not even as wide. They don't have much surface area. When I had all those filter clogging issues I was also dealing with some partially hydrogenated oils and was still running on the original Greasel automatic transmission cooler heat exchanger. Since changing to my own heat exchanger I have not had any problems.

I have also added to my filtration setup. Back then I warm filtered to 5 micron and cold filtered on the way into the truck at 10 micron. I now warm filter to 1 micron and then cold filter to 1 micron as well. My hope is to collect enough oil to do some longer term storage of the filtered product. This will allow any hydrogenated oils to settle to the bottom. Then I will only pump from the top.

Todd T

quote:

3/8" fuel line leaves the tank, through a small disposable filter and into a facet pump

This part will give you problems... the facet and small filter isn't goin to like cold VO The carter FP's we use will suck through the HIH no problem... why not get one and put it on the hot / outlet end of the HIH?

Thanks John. Is there a specific model of carter fuel pump you recommend?

Also, is it available locally, or online is the best bet?

In another thread, I've been looking for some engine bay mounting advice (insert joke here _______), any more help would be greatly appreciated:

http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/7031009341

Thanks folks!

you really do not need a pump with the Mercedes lift pump it will pull veggy fine... I would recommend the Frybrid valves and use the prefilter but move it upto the engine compartment where it will get hotter VO, and see how it holds up there

The part #'s are on the install page of my site...