Would it be daft to.....

tim leech · Post by **tim leech** » Fri Feb 08, 2008 10:06 am

Seems a lot of hassle to me and with Mulleys recent problems on running veg oil I wouldnt bother!

I know diesel isnt cheap but I bet most Diesel Bx's do a good 50mpg for each £5 a gallon so its nots bad value.

Post by **docchevron** » Fri Feb 08, 2008 11:21 am

jeremy wrote:I'm curious - how can a diesel pump overfuel an engine? The diesel works on the principle of free air - which means that the air supply is unregulated - so more fuel - the more power it produces.

So at idle the speed would be too much - so slow the idle. At full throttle it might smoke - so adjust the throttle stop.

Where have I gone wrong?

You haven't.

The fuelling differencs between the 17 and 19 is marginal, very marginal, and a moments work to turn the fuelling down on the handily provided adjustment screw.

Ian_Fearn · Post by **Ian_Fearn** » Fri Feb 08, 2008 6:13 pm

I did over 10,000 miles on veg oil in my old Golf TD without any issues. In fact that car has since done another 30k on veg without issues.

I think Mulley got a dodgy batch of Biodiesel, which will probably be something to do with it not being washed properly after transesterification.

BX Bandit · Post by **BX Bandit** » Fri Feb 08, 2008 8:15 pm

No! You wouldn't be daft! The injectors operate at an extra 20 bar or so, I guess giving extra atomisation/burning economy or power. There is more torque below the boost and you can tune the Bosch pump to give you a bit more fuel below boost, more fuel during boost and to be more repsonsive to giving the extra fuel during boost pressure increase. If you can get the parts, well worth it and a doddle to fit. As has been mentioned, there is additional waterworks involved for a cold start timing advance. Waste of time imho, not only has my unit failed, but it has made no noticeable difference to the car. If you are bothered, you could fit the electrovalve doc mentions, or even use a 'choke' cable, but personally I wouldn't bother with it.

MULLEY · Post by **MULLEY** » Fri Feb 08, 2008 9:05 pm

Ian, have you done any mods to your car to run on veg oil? or r u just pouring it into the tank? if so what sort of % r u using?

Just to clarify, i've had no issues with VEG OIL, its bleedin BIO DIESEL thats cocked things up. However i've now sorted out the issues i believe, so the car is behaving itself for the mo

Philip Chidlow · Post by **Philip Chidlow** » Fri Feb 08, 2008 9:47 pm

I have been running our ZX's on a 50/50 mix of 100% Rapeseed oil (Pura from Sainsburys @ 56p a litre) and DERV with NO ill effects.

Saves at least £12 a tankful.

Bio Diesel is a no go as far as I'm concerned.

Ian_Fearn · Post by **Ian_Fearn** » Sun Feb 10, 2008 1:08 pm

MULLEY wrote:Ian, have you done any mods to your car to run on veg oil? or r u just pouring it into the tank? if so what sort of % r u using?

Just to clarify, i've had no issues with VEG OIL, its bleedin BIO DIESEL thats cocked things up. However i've now sorted out the issues i believe, so the car is behaving itself for the mo

The problem with pukka Biodiesel is simply when its not made properly. Made properly with TLC theres no reason why it shouldn't run perfectly.

I ran 100% in my Golf TD in the summer, around late October i went to 80% veg, 20% diesel with no noticeable difference except LOTS less smoke.

I wouldnt run a Lucas pump on any veg combination hence I want to convert it to a Bosch system if i could find the bits.

Theres loads of Xantia TD's in my local scrapyard would one of those suffice then?

MULLEY · Post by **MULLEY** » Sun Feb 10, 2008 8:14 pm

If the veg oil is heated up correctly, then you can run it on a lucas pump.

It's still more likely to fail though than a bosch, but if you can get all the parts you need to go from one to the other, why bother changing, might as well run with your current pump & when that goes bang, then change over, as it might not go bang anyway.... That could save unecessery expense & effort.....

Good luck with whichever decision you make.....

I just purchased VOW heater system, so all i've got to do now is find someone to fit the thing...

Ian_Fearn · Post by **Ian_Fearn** » Sun Feb 10, 2008 8:18 pm

MULLEY wrote:I just purchased VOW heater system, so all i've got to do now is find someone to fit the thing...

Explain.......

MULLEY · Post by **MULLEY** » Sun Feb 10, 2008 8:28 pm

This is the heater i got off e-bay:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=007

They have a website called:

http://www.vow2.co.uk

What do you think??

Ian_Fearn · Post by **Ian_Fearn** » Sun Feb 10, 2008 8:47 pm

Very simple to install but "120 seconds before hot oil reaches the pump" doesnt convince me its the way to go with a Lucas pump.

MULLEY · Post by **MULLEY** » Sun Feb 10, 2008 8:52 pm

Yes it will still put strain on startup, what i was thinking though was that if you turned on your ignition to get the glowplugs to fire up & you manually squeezed the fuel pipe bulb to flush out the cold fuel for the warmer fuel, that would reduce the strain...

Not ideal i guess, but potentially the cheapest method compared to a seperate tank system...

Or am i talking complete hogwash?

Ian_Fearn · Post by **Ian_Fearn** » Sun Feb 10, 2008 9:02 pm

Well i'll certainly be interested to see how yours operates Mulley.

When are you fitting it?

MULLEY · Post by **MULLEY** » Sun Feb 10, 2008 9:04 pm

When you come up & fit it for me

Ian_Fearn · Post by **Ian_Fearn** » Sun Feb 10, 2008 9:15 pm

Come on Mulley, it cant be worth me trekking across Derbyshire just to do this!