Dougk

Hello all,
I have a 95 cummins that I want to upgrade the injectors a bit. I run biodiesel and have a veggie kit. I have been told that some folks coke up the injectors with veggie because of the fuel viscosity and its flash point. But one person that said this was running 370s and I have heard that they dont have the correct spray pattern to begin with. Also, I have been told if I wanted to upgrade, I should just find a set of 215 injectors as I have a 160 pump. Is anyone running modified injectors with a veggie kit? Thanks and I appreciate the input as I dont want to ruin injectors and possibly ruin my engine because of nozzle problems.

Douglas

PS: Should the timing be changed to make up for the different flash point of these fuels? Thanks again.

Dougk

Anyone have any ideas?

stinkindiesel

It's not the injectors that cause coking/ruined injectors/engine carnage/etc., it's the fuel itself. Coking injectors is one problem, which leads to poor spray patterns, which leads to holes burned in pistons. I also wouldn't want bits of carbonized glycerine and coking to go through my turbo.

Another problem is the glycerine- if the WVO isn't up to temp (190*+) it produces carcinogenic compounds as a result of incomplete combustion. Burning WVO as fuel results in some nasty by-products if it's not done right.

Why not make a little biodiesel processor to meet your fuel needs, sell the veggie kit, unclutter the under-hood area, and run whatever injectors you like with no thought to WVO spray patterns? Your truck will love it, your pump will be the better for it, and I guarantee you'll make more power on bio than WVO.

Yes, I'm a biodiesel guy- more than 6,700 gallons over the last 7 years. I have run WVO at ambient temps in our 1984 300SD and WMO in the 300SD and Dodge CTD but my first love is biodiesel. It works in the Benz, the Dodge, the Jetta TDI, my in-law's CRD CTD, my buddy's 2005 Passat TDI, and an ugly little grey-market 3-cyl diesel tractor. No #2 warmups and purges, no switching tanks, no complicated mess of hosing and filter heads under the hood, no sticky veggie oil residue on everything near the fuel filler...

kawi600

if you run the fuel on a hot engine, remember to purge back to diesel before shutdown and dewater and filter your fuel, I doubt youll have any problems.

Dougk

I make biodiesel and also run on veggie with a frybrid kit. So I know that the veggie is getting up to temperature before it is injected. I do purge the system before turning it off. Thanks and I think that I will probably just settle with 215 injectors and hopefully be happy with them. Thanks

DK