Vehicle & Technical > Defender

Veg Oil conversion

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Saffy:

--- Quote from: Suvvey on December 03, 2009, 19:02:31 ---Most of the research I've done on this and people I have spoken to are quite adamant that the oil needs to be as hot as possible to ensure proper combustion, prevent coking of the cylinders,  seepage of the unburnt vegetable oil into to sump as well as premature pump failure.

--- End quote ---
Erm...well the engine needs to be up to temperature for sure before switching over or it possible to suffer long term with polymerization, coking, piston ring wear, loss of compression and eventual failure if vegoil is injected through cold injectors onto cold engine pistons. But actual fuel temp being injected is irrelevant!  Think about it, like said the fuel will take on what ever temperature the Injection pump is at regardless what the HE did to it before hand. Landrover TDi's are fitted with Bosch injection pumps, these are VERY tolerant to cold vegoil. It will go through further temp changes after the IP from the fuel lines and hot injectors then into very hot cylinders! Really... the HE on the fuel line is not exactly necessary with a Landrover Tdi. But including a GOOD heat exchanger in the system will help ease winter clogging and reduce stress on the lift pump. Good heat exchanger = flat plate design not glow plug heaters.

I got most my theory and research from here http://www.vegetableoildiesel.co.uk/forum/index.php
Some of my measurements of engine bay...
Prior to install - temperatures measured around the engine of the truck then up to operating temp. Infrared thermometer used:
Injectors: 84 deg C average
Injector pipes near injector union: 64 degC average
IP PUMP INLET : 50 DEG C
IP PUMP OURLET: 50 DEG C
IP PUMP BODY: 60DEG
LIFT PUMP: 41 ?
FUEL FILTER CANISTER: 50 DEG C
HEATER IN /OUT PIPES : 86 DEG C
CYLINDER HEAD: 95 DEG C AVERAGE ON FUEL SIDE


--- Quote from: Suvvey on December 03, 2009, 19:02:31 --- That being said I would be interested in any pics you might have of your 90 tank set up. Do you fill it from under the drivers seat?

--- End quote ---




Yeah I lift the seat and slid the panel and fill up that way. Because it's the Derv tank I do not have to fill it that often so it's not a regular drama. I have CSW 5 door 110 so that ruled out the external filler cap behind the driver door. So my old style 90 tank was modified by cutting off and plating the existing filler on tank. The filler/cap neck relocating to a suitable location on the top. The storage box panels under the driver seat had to be cut/removed to allow tank to fit and tank had to be bracketed. I originally bought a series military tank to fit there as that what people said would fit.... those people where talking out their butts.. Only way a series tank will fit if it hangs down lower than the bottom of chassis rail!

bogie:
This all seems a lot of hassle to run on veg oil.Ive been running on veg oil for 6 years with a 200 and no convertion! I did use wvo but by the time i had filtered the crap out,it worked out i was paying around 75p a litre.I now just go asda ,83p a litre and no mess!!!!! Just run on 60% veg &40%diesel or 75%veg & 25% petrol in the cold. In the warm weather you can run 80% veg no problem. A damn sight easier than all that other rubbish!!!!

Saffy:
One of the trends I notice with age is that no matter what there will always be someone that comes along and says "poopoo that.... I never had any problem". I know for sure there is someone out there right now (maybe they are in bogie's world) stating something like "and I play russian roulette all the time and never had a problem". I can only hope with age that I learn to sprinkle the pinch of salt without rising to troll bait.

Suvvey:
Bogie- I'm hoping to get my WVO for next to nothing or maybe cheaper :twisted: So it seems to me (and many others) to make perfect sense to run on 100% whenever possible. I also tried running my previous truck on a SVO/Diesel mix and to be honest it worked fine too but I only tried this for one warm summer and then heard far to many woe stories to keep it up long term.

Personally to me running long term on a high percentage mix throughout the year with high risks and limited savings seems like a 'rubbish' way of doing things. But of course I would be far to polite to post it in someone else's thread :-.  I might offer my opinion......

Mutz:
Tanglefoot, you seem to have done a lot of research into this and everything you talk about sounds quite logical.

Like the 2nd tank setup.

I hope to go veg when i get mine back on the road so have been watching this (and other veg threads) with interest.

No room for a 2nd tank in a 90 tho so mine would have to be in the rear, not wanting to put a td5 tank on.

As Suvvey is a mate im letting him sort his out first and iron probs out then copy his set up :afro:

Think i would rather listen to someone who has done research rather than; chuck it in itll work.
 

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