Bio-LPG???

[TroyH Senior Member Find all posts View Profile Close TroyH]

Re: Bio-LPG???

I disagree.
Aromatic fuels are much easier to ignite than non aromatic oils.

Aromatic fuels?

LPG is mostly a mixture of butane and propane gases. Neither of which are aromatic...

[Captain Echidna Senior Member Find all posts View Profile Close Captain Echidna]

Re: Bio-LPG???

Is "volatile liquids" (volatile liquids, liquids with a high vapor pressure or low boiling point) the phrase being looked for?
(Mind you I looked up aromatics in wikipedia and started to fantasise about females, same as I did in chemistry at high school when I didnt have a clue as to what was being said.....)

[Nuddy Senior Member Find all posts View Profile Close Nuddy]

Re: Bio-LPG???

You have obviously not used petrol to start a diesel before!
I'd be figuring more like 20ML per start.
200Ml is either not going to let the thing start at all or it's going to blow the head clean off or shatter the pistons to bits if it does light.

I have found methanol to be a much better starting agent than petrol.
A simple washer bottle wired to a momentary switch with a nozzle pointing down the intake would be easy and effective to set up for starting purposes.

OK too many zeros. 3 cents for petrol and 1.5 cents for LPG.
200 ml would perhaps risk a hydraulic lock but would not do as you describe. Liquid petrol does not 'explode', nor even burn. It is only the vapour given off from the liquid that can burn when mixed with an appropriate amount of air - about 33,000:1 by volume. Injecting 200 ml of petrol into the intake would have the same effect as injecting 20 ml as long as too much liquid does not enter the cylinder, causing hydraulic lock.
I can't buy less than 200 litres of methanol so I will use petrol which I can buy 1 litre at a time if I wish.
However this is all on hold as I have changed vehicles and need to convert asap.

[DutchAussie Member Find all posts View Profile Close DutchAussie]

Re: Bio-LPG???

OK too many zeros. 3 cents for petrol and 1.5 cents for LPG.
200 ml would perhaps risk a hydraulic lock but would not do as you describe. Liquid petrol does not 'explode', nor even burn. It is only the vapour given off from the liquid that can burn when mixed with an appropriate amount of air - about 33,000:1 by volume. Injecting 200 ml of petrol into the intake would have the same effect as injecting 20 ml as long as too much liquid does not enter the cylinder, causing hydraulic lock.
I can't buy less than 200 litres of methanol so I will use petrol which I can buy 1 litre at a time if I wish.
However this is all on hold as I have changed vehicles and need to convert asap.

From memory, a long time ago, they used to spray ether into the air intake and crank the engine at the same time.
Correct me if I am wrong because I am talking about the 1960's.

[Nuddy Senior Member Find all posts View Profile Close Nuddy]

Re: Bio-LPG???

From memory, a long time ago, they used to spray ether into the air intake and crank the engine at the same time.
Correct me if I am wrong because I am talking about the 1960's.

You are not wrong. I did it myself in the 60's 70's 80's and 90's.

[Nuddy Senior Member Find all posts View Profile Close Nuddy]

Re: Bio-LPG???

Ummm, Not Quite!
The stoichiometric ratio of petrol is around 14.7:1 although it will certainly burn at different ratios, 33K: 1 is outside those limits.
The lower flammability limit of petrol with air is 1.3% so at 33K:1, your not going to get so much as a pop.

Regardless of vapor or liquid, if you poured 200Ml of petrol into an engine and did get it to light, I have little doubt the head would come off or the pistons come out !

Methylated spirits makes a good substitute for methanol ( even though it is different material) and is available in 1L bottles.

14.7 : 1 by WEIGHT, 33,000 : 1 by VOLUME.
To burn 200 ml of petrol it needs to be completely vapourised and evenly mixed with 3 kg of air. Mix it with a cylinder full of air - about 500ml and it won't burn. Petrol vapour and air at 33,000:1 is a combustible mixture, not an explosive one. 200ml of liquid petrol with 500 ml of air wont burn. A little of the vapour given off will burn until the oxygen is used up, then it will go out. 200 ml of liquid in the cylinder will cause hydraulic lock and then something has to give, usually a conrod.
I have poured 200ml of petrol into the intake manifold of a spark ignition engine then cranked. The vapour coming off from the surface of the petrol was drawn in with the ingoing air and the engine started and ran for several minutes until all the liquid was vapourised and used.

I can buy a litre of metho for $4 or a litre of petrol for for $1.40 is metho that much better as a starting fluid?

[Nuddy Senior Member Find all posts View Profile Close Nuddy]

Re: Bio-LPG???

In my experience, it is.
Different engines may respond differently. I found a lot of nailing when using petrol that does not occur nearly as much with alcohol's used as starting fluids.

When you are talking about using maybe 50ML per start, to me the price is so insignificant it doesn't matter, so I just want to use whatever is the safest thing for my engine.
Others may be more price conscious than I but given the massive savings I make from using veg in the first place, I have no problem spending a couple of bucks when I still have about 95% of what just one tank on fuel would cost in my pocket if I were buying it like all the the other unfortunate, uneducated people.

I agree. I will try it with metho.

[Jasper Free from the Majors Find all posts View Profile Close Jasper]

Re: Bio-LPG???

From memory, a long time ago, they used to spray ether into the air intake and crank the engine at the same time.
Correct me if I am wrong because I am talking about the 1960's.

Some people still do it with ether today
Start Ya Bastard Instant Engine Starter - Nulon Products Australia


Cheers, Chris