Is there anyone here running waste oil in their Cummins? If so, what type of setup do you have for filtering the oil. Also, how well does the VE pump handle this type of thing?

 

the v.e will not take it

 

It seems like the P7100 is the best for these conversions with the VE pump coming in second. Does anyone here have first hand experience running WMO in their VE pump Cummins?

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Which Truck Should I Get for a SVO (WVO, VegOil) Conversion? « Arctic Vegwerks

Which Truck Should I Get for a SVO (WVO, VegOil) Conversion?
March 31, 2008
The most popular post by far on the Vegwerks Blog is Which Diesel Should I Get for a SVO (WVO, VegOil) Conversion?

Not surprisingly, it’s also the most common email (and phone call) question that I get.

So, loyal readers, here are my top three choices for SVO trucks:

1994-1998.5 Dodge Cummins 5.9l 2nd gen 12 valve
1989-1993 Dodge Cummins 5.9l 1st gen 12 valve
1983-1994 Ford International 6.9/7.3l pre-Powerstroke
Now, here’s the details:

Straight Vegetable Oil (SVO), even when heated, is still thicker than diesel. You need a truck with an injection pump than can withstand the added stress of SVO.

The strongest injection pump out there out there is the Bosch inline P7100, found on 2nd generation 12 valve Dodge Cummins trucks.

The best SVO truck:
1994-1998.5 Dodge Cummins 5.9l 2nd gen 12 valve

Other good candidates for a vegoil conversion are pre-Powerstroke 6.9/7.3 Fords with the regular Stanadyne injection pumps and 1st generation 12 valve Dodges with the Bosch VE rotary pump. Personally, I convert a lot of VWs with the Bosch VE pump, and have good luck with them, so I would prefer a Dodge, but they are harder to find than the Fords. In early 1994 Ford made a turbodiesel version of the 7.3 IDI, it’s the newest, most powerful of the old-style pre-Powerstroke engines.

Common, easier to convert diesel trucks:
1989-1993 Dodge Cummins 5.9l 1st gen 12 valve
1983-1994 Ford 6.9/7.3l IDI

Halfway through 1994 Ford switched from an Indirect Injection (IDI) engine to a Direct Injection (DI) system with a Hydraulic Electronic Unit Injection (HEUI), a type of Common-Rail system, instead of a regular mechanical injection pump. These are very common, but the fuel routing issues cause purge times to be almost 15 minutes with a standard conversion. With the extra modifications to reduce purge times, these can run vegoil very well, but may cost $1000-$2000 more.

Common diesels that may require more complex, expensive conversions:
1994.5-1997 Ford Powerstroke 7.3l 1st gen
1999-2003 Ford Powerstroke 7.3l 2nd gen

GMC/Chevy trucks have a very sensitive injection pump that is known to break when running straight vegetable oil. I don’t recommend converting these trucks, although there are a few local GMC fanatics who are running SVO.

The Dodge VP44 is a radial-piston rotary pump, instead of the axial-piston VE rotary pump, and that makes a lot of difference. Basically, the VP44 is a sensitive pump that breaks easily on straight vegetable oil.

Not Recommended:
1982-2000 GMC/Chevy 6.2/6.5l
1998.5-2002 Dodge Cummins 5.9l 24 valve

Yeah, but what about the newer trucks? Ummmmm, they’re newer. All have Direct Injection (DI) engines with some sort of common-rail injection system, and would require at least as much additional modifications as the 7.3l Powerstrokes. We can convert them, but consider converting them experimental and expensive.

And what about Isuzu, Toyota, International, and other early 80′s trucks? Well, most of them are pretty good candidates, but info on the rare trucks is beyond the scope of this piece, although I’ve happily driven an old VW pickup for years on SVO.

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I've been running 85-100% wmo in my cummins for the last 6500 miles. I gravity filter through a 5 micron filter then mix with regular gasoline and let it settle until I'm ready to use it. I fill the slip tank on the back of the truck and run it through a 10 micron filter before it hits the main tank.

I go through a fuel filter (on engine) roughly every 1500-2000 miles. Which is a small expense when you consider what I'm saving. My fuel pressure is 5-7 psi at idle with a fresh filter and 0-3 psi at WOT. I'll be installing a LP piston pump soon to help when it is cold.

I bumped the timing to help with the extra smoke since it takes the oil longer to burn. I also back off the star wheel. Other that that I just have the power screw turned to the factory collar.

On a wide open pull unloaded, on level ground i hit 24 psi and haven't seen anything over 1050 on the pyro. Hope that helps!

 

Even with extensive filtering, think of the soot particles in diesel engine oil. In an engine it is ok, but the pumping pistons on a p7100 have very very tight tolerances to seal fuel for building pressure for injection. The soot particles will destroy an injection pump in my opionion.