Author Topic: svo and performance mods...safe? (Read 4866 times)

carrizog60 · « **on:** May 29, 2006, 11:25:29 pm »

i am running 50% of SVO on my 1.6D(gtd with 1.6D engine) and i want to make it a bit more faster but i am affraid that this fuel will damage the pump if i modded it to give more fuel...
is it safe? :?:

jwspin · « **Reply #1 on:** May 30, 2006, 07:31:32 am »

it works great. i have built up two cars that were running 100 percent svo. it is best if you have either a lift pump or you are properly heating the svo. best to put a heat exchanger in there anyway.

-jared

carrizog60 · « **Reply #2 on:** May 30, 2006, 03:17:40 pm »

no mods on the car...
just mixing 50/50 with normal diesel.
it makes no stress to the pump as she is pumping something not so fluid as the diesel in larger quatities?

745 turbogreasel · « **Reply #3 on:** May 30, 2006, 11:40:30 pm »

I have met a lot of people who associate their engine failure with cold veg...

carrizog60 · « **Reply #4 on:** May 30, 2006, 11:58:01 pm »

i only feel difference in the morning. no hard start but the engine makes a little more noise.
not that cold night in portugal, in the summer we get +- 10-15º at night and above 30 in the day...

jwspin · « **Reply #5 on:** May 31, 2006, 03:14:45 pm »

I do veggie oil conversions as a side job and i will only install two tank kits which are designed properly. but for my own cars i know enough about the veggie that im not too worried about running cold. i do think heat exchangers on your filter are worth it though. cold veggie in your filter puts a lot of strain on your pump.

-jared

carrizog60 · « **Reply #6 on:** June 01, 2006, 12:10:40 pm »

how much in degrees is cold to SVO?
as i live in portugal amybe the wether here is not that cold to oil... :idea:

jtanguay · « **Reply #7 on:** June 01, 2006, 12:29:04 pm »

cold veg is pretty viscous. the pump will definitely be working harder to pump that through the lines. it was designed to pump diesel. even warm veg oil would be better than cold... if you have a bunch of pumps lying around then go cold and see how long it lasts. if not, its cheap insurance

745 turbogreasel · « **Reply #8 on:** June 01, 2006, 01:52:13 pm »

The combustion temperatures may have as much to do with it as the viscousity. It seems likely that this is why we just put all new pistons in my friends Cummins at 180K. The PO admited to mixing veg on long trips.Combustion chambers and crankcase were both coatied in a layer of impenetrable crap, and eventualy 4 pistons hung in their bores. 4 days in the hot tank did not remove all the stuff from th oil passages!

jtanguay · « **Reply #9 on:** June 01, 2006, 02:04:13 pm »

Quote from: 745 turbogreasel

The combustion temperatures may have as much to do with it as the viscousity. It seems likely that this is why we just put all new pistons in my friends Cummins at 180K. The PO admited to mixing veg on long trips.Combustion chambers and crankcase were both coatied in a layer of impenetrable crap, and eventualy 4 pistons hung in their bores. 4 days in the hot tank did not remove all the stuff from th oil passages!

interesting... he must have put in some crappy veg oil, and or some bad leaky injectors. I heard you need to increase timing when using veg oil as well, so it has longer time to fully combust. True?

QuickTD · « **Reply #10 on:** June 01, 2006, 06:43:01 pm »

Quote

Combustion chambers and crankcase were both coatied in a layer of impenetrable crap, and eventualy 4 pistons hung in their bores. 4 days in the hot tank did not remove all the stuff from th oil passages!

The glycerin in straight vegetable oil does not burn completely in a diesel, even worse with cold oil. This unburned glycerin gets past the rings and "polymerizes" the engine oil to some extent, forming, as 745 turbogreasel so eloquently put it , "impenetrable crap". Technically the resultant varnish is a form of plastic. The owner of the cummins was perhaps not aware of this and didn't shorten his oil change intervals when running SVO.

jtanguay · « **Reply #11 on:** June 01, 2006, 07:08:46 pm »

what about increasing timing to give extra time for it to burn? maybe performance + svo aren't such a good idea... (unless you want to change your oil every... 2500km or so)

QuickTD · « **Reply #12 on:** June 01, 2006, 07:32:11 pm »

Quote from: "jtanguay"

(unless you want to change your oil every... 2500km or so)

I don't think its quite that bad, but you probably should follow the "severe service" schedule and change it at 5000km.

745 turbogreasel · « **Reply #13 on:** June 02, 2006, 12:49:00 am »

My car has 30K mostly veg miles(pretty sure its more than his truck), and there are NO deposits in the oil system. I know, I just had the head off, and the aluminum was still shiny. I use Delo400 at 3000+ mile intervals.
I also drained my Veg tank the other day, thinking 5 years would have built up some crap in there. Much to my surprise, I didn't even find waterOnce I had it drained, here was a thin film on the white tank sealant, and most restaraunts would still cook with the oil in there.
Why my sucess?
I do settle my oil a lot, prefilter to 0.5 micron, and run a heated tank. I also steer way clear of dubious oils.
My friend with the Dodge shares the same oil with me, and we added a proper conversion right after he got it, but I'm thinking it was already too late.
Sad, but with a new motor, and the 6 speed going in, his '98 will be soooo sweet.

carrizog60 · « **Reply #14 on:** June 02, 2006, 11:50:10 pm »

forgot to say that i use new oil , not used one so deposits are harder to find in there.