Author Topic: WVO or Bio (Read 3655 times)

GTD. · « **on:** July 18, 2007, 04:03:42 am »

Will my engine run ok on filtered, heated WVO or should I make it in to RME/FAME Biodiesel or just thin it out with white spirit/kerosene?

Its a 1991 1.6 SB IDI TD that's done less than 65,000miles, looking into it as over here Diesel is around 98.8p (almost US $2) per litre but now the first 2500L of bio you produce a year is untaxed so making my little GTD almost free to run.

rubadubdub · « **Reply #1 on:** July 18, 2007, 05:27:34 am »

bert on here justs pours cooking oil into his without extra heating i believe. He'd be the best person to ask.

Ive been looking at doing this too with my GTD but so far havent put anything into practice. All the stuff below is what ive got from tinternet during my investigations so dont take it as gospel.

Theres a UK forum http://www.vegetableoildiesel.co.uk/forum/index.php which covers veg oil conversions. I searched for GTD and the limited info seemed to suggest SVO was fine without modification other than ensuring injector nozzles are in good nick and advancing the pump timing slightly.

Think another recommendation was to loop the return fuel line in before the fuel filter to reduce the pressure on the fuel pump having to move higher viscosity oil back to the tank.

My plan, once it has passed its MOT, was to stick in a prefilter before the main fuel filter so that any crud in the fuel tank which is carried by the stickier oil is removed without clogging the main filter. Then add a few litres so its say 10% oil, 90% diesel and see how it responds. Considering putting a heat exchanger in too but still very much at the design stage.

Still not 100% confident it wont gunge up the engine during the time when the cars not fully heated up.

bigblockchev · « **Reply #2 on:** July 18, 2007, 12:52:30 pm »

It will run better on Biodiesel than WVO. I make BD but have on occasion tried mixing WVO at about 50% ratio. It definitley starts better on BD about same as reg diesel. I only tried this when the weather is above 10c at night. The oil I get is canola good to about -6c before crystals form in a jar left outside. Do a search for biodiesel infopop that is the best forum for noobs. BTW I have a 92 Jetta TD same motor. Cheers Dan

bert · « **Reply #3 on:** July 18, 2007, 05:24:40 pm »

I do just pour in and drive i go to makro and get 20L for £10.49,thats 52p liter,i put a £10 of diesel in and 30L cooking oil,runs lumpy for 15 secs then its fine,ive put a heat exchanger on my SB jetta TD i made so if its too lumpy or cold out,just switch it on and it soon warms the oil up,been doing it like this for 7 years in a golf GTD and now my jetta and the mk1 GTD :wink:
If you want come over im in halesowen,i will show you,ive not touched pump timing or injectors and its done 126000 miles and SWEET

Bert

OM617 · « **Reply #4 on:** July 18, 2007, 10:31:13 pm »

Use diesel, what it was designed to run on.

burn_your_money · « **Reply #5 on:** July 18, 2007, 10:38:21 pm »

Quote from: "OM617"

Use diesel, what it was designed to run on.

That's like saying "keep it stock" because that's how it was designed.

bevboyy · « **Reply #6 on:** July 18, 2007, 11:47:57 pm »

And following that train of thought, we should all be using peanut oil as that is what the original diesel ran on...

burn_your_money · « **Reply #7 on:** July 19, 2007, 07:55:45 am »

Or coal dust...

but back to bio/WVO :lol:

jtanguay · « **Reply #8 on:** July 19, 2007, 08:58:06 am »

only thing that would be neat, is using the diesel timing meter to time the engine to the more viscous veggie oil.

bert · « **Reply #9 on:** July 19, 2007, 01:38:40 pm »

24 months,many miles,and it actually sounds quieter than when its on straight diesel,why not use fuel at half price :wink:
Bert

mk2diesel · « **Reply #10 on:** July 20, 2007, 08:47:05 pm »

preheat the wvo and the oil thins out to proper viscosity for the injector pump ...... runs better too , better spray pattern .....

Turbinepowered · « **Reply #11 on:** July 20, 2007, 08:57:13 pm »

Quote from: "bevboyy"

And following that train of thought, we should all be using peanut oil as that is what the original diesel ran on...

Actually, gasoline was the first successful compression ignition fuel, introduced via air-injection to the cylinder. Well, the first one that produced power and added it back into the drive belt instead of taking power from it.

Kerosene was next, I believe, then peanut oil once Diesel started doing demonstrations.

jtanguay · « **Reply #12 on:** July 20, 2007, 11:42:34 pm »

Quote from: "mk2diesel"

preheat the wvo and the oil thins out to proper viscosity for the injector pump ...... runs better too , better spray pattern .....

i would imagine the veg to still be thicker than diesel when hot. plus the fact that the fuel is supposed to cool the injection pump/injectors doesn't help matters when it is around 180F.

works great on the older cars, but newer TDI's and Pump Duse cannot handle the veg for too long.