Thread: simple bio-diesel?

I am running 3 300tdi vehicles on WVO and have had no adverse effects.
I use a mix of 20ltr Diesel, 2ltr petrol and 58ltr WVO. I have a heater on each of the injector pipes just before the injectors and have replaced the plastic pipe and banjo to the injector pump with a 30cm length of steel pipe with a banjo silver soldered to the end. This also has a heater on it. The heaters are regulated to 100 deg C.

The standard fuel filter is more than capable of delivering at a high enough rate to prevent the lift pump being stalled.

I get no smoke, the engine runs more smoothly and it also is quieter. I have noticeable increase in power and I get the same mileage.

The WVO is cold filtered to 5 microns.

I am considering a band heater for the fuel filter to allow me to use hot filtered WVO as any animal fat will then pass through the standard filter meaning virtually no waste product from the filtering process other than solids.

I have another 2 vehicles to convert one being a 200tdi.

A mod I have done to the Defender 300tdi is to move the turbo boost pressure lines from the output of the turbo up to the intake plenum. This has given me a 1 psi increase. The other mod I have done is to put a T piece in the wastegate actuator pipe and bleed directly to the atmosphere. What this has achieved is another 2 - 2.5 psi of boost and a much shorter spool up time of the turbo. The other advantage is that the wastegate stays shut until closer to the opening pressure.

Performance has been greatly enhanced. I have no figures as yet but will be looking to put it on a dyno soon.

My apologies, I was talking about making bioDiesel.

I did try heated WVO and it ran fine, though with a stronger exhaust smell than my bio...

My Bongo wagon did'nt have enough spare space to go the dual-tank plumbing nightmare etc of WVO, and I preferred to do my 'fiddling' OFF the car.

But with some ingenuity anything is possible... such as a Mazda 626 with a WVO tank built next to the radiator, on the passenger side. Quite elaborate and used up most of the available space, held, I think, 18 or so litres. Tank had a few loops of pipe carrying hot water. And a large enough filler lid to accept scoopfuls of lumpy fat.

Fuel filter was a Z9 oil filter, kept up to temp via a heated clamp.

The Big Secret to WVO is to filter, filter...and filter it first. Then keep it warm enough to be as runny as normal diesel. Cold filtering is excellent, though usually done 'Off-vehicle'.

James in Perth