Ahh the memories of the unmarked driveway, it was just 9 short months ago that I had nothing to park on that side of the drive. How I lived without spots of 'Land Rover woz ere' to admire I'll never know!

Fortunately it's only the odd drip now I've had the p gasket done and replaced the breathers, I do occasionally consider investigating it but as it's minor and 'they do that sir' it's probably best to let sleeping dogs lie for now
 
wammers said:
True. It won't go bang without a spark. ;);)
Click to expand...
I have seen a diesel running on LPG but the way they did it was to set the FIP to idle for the ignition and only increase the the LPG intake by putting it through a mixer with a venturi in it to create a vacuum .
 
ovalandrover said:
I have seen a diesel running on LPG but the way they did it was to set the FIP to idle for the ignition and only increase the the LPG intake by putting it through a mixer with a venturi in it to create a vacuum .
Click to expand...

LPG needs to be ignited it is not compression ignitable. So they were using the idle fuel as a sort of spark.
 
ovalandrover said:
I have seen a diesel running on LPG but the way they did it was to set the FIP to idle for the ignition and only increase the the LPG intake by putting it through a mixer with a venturi in it to create a vacuum .
Click to expand...

Interesting. I have seen people add LPG to diesels, usually on the drag strip though with bigger turbos, intercoolers, nitrous, methanol cooling etc.

I did consider adding a little at one point because it is supposed to give cleaner burning and a tad more power. But then I thought about that head and changed my mind!
 
You can use lpg on diesels but as wammers says you also have to have diesel being injected into cylinders as well the lpg helps for a cleaner more efficient burn. You could always add a browns gas system ( run your car on saltwater).
 
At least a year on my 300tdi - basically shortly after I got this one I'd been round sorting all the old washers and whatnot.... Quite why people put up with leaky things is beyond me.
 
None. The blasted radiator drain plug has just dripped down my neck getting the damned blocks out for setting EAS levels in an EAS system that's driving me up the flippin wall. NOW I've said it! Therapy for me again. God, I hate those wires on my head.
 
No in a Disco but it's possible to have them leak free in rangies...

wammers said:
LPG needs to be ignited it is not compression ignitable. So they were using the idle fuel as a sort of spark.
Click to expand...

You certainly can use LPG as compression ignition fuels assuming you have sufficient compression. Most diesels, especially turbodiesels don't get the fuel hot enough to go but it's certainly possible to convert some NA diesels with higher compression ratios.
 
Think you had better do a bit more reading, why would a normally aspirated diesel have a higher compression ratio than it's turbo mate? Have a read about what octane rating is.
 
wammers said:
Think you had better do a bit more reading, why would a normally aspirated diesel have a higher compression ratio than it's turbo mate? Have a read about what octane rating is.
Click to expand...

For the same reasons that a turbo petrol has a lower compression ratio - to reduce excessive peak cylinder pressures due to the larger charge.

Also diesel tend to use cetane ratings, not octane ratings. In an Otto or Atkins cycle you care about predetonation, for Diesel cycle is flame ignition speed hence a different measurement.
 
chris-the-gerbil said:
For the same reasons that a turbo petrol has a lower compression ratio - to reduce excessive peak cylinder pressures due to the larger charge.

Also diesel tend to use cetane ratings, not octane ratings. In an Otto or Atkins cycle you care about predetonation, for Diesel cycle is flame ignition speed hence a different measurement.
Click to expand...

They do, because diesel has a very low octane rating that is why it ignites with heated air rather than a spark. LPG needs a spark to ignite it, you would need seriously hot air for it to ignite from that. Most diesels NA or turbo run at around 22 to 1 max maybe 25 to 1 nothing like good enough to ignite something with an octane rating of around 130. It could be ignited by using a small amount of injected diesel to initiate it. But otherwise it is not feasible as a stand alone compression ignition fuel.
 
OK.

Propane has an octane rating of 112 not 130 for a start.

Are you aware of the difference between cetane and octane ratings? The autoignition point for propane is about 450C which is considerably higher that diesel yes, but easily achievable in higher compression engines. I'm not talking about every engine - never have been - but in some diesels that do have sufficient compression you can use propane directly.
 
chris-the-gerbil said:
OK.

Propane has an octane rating of 112 not 130 for a start.

Are you aware of the difference between cetane and octane ratings? The autoignition point for propane is about 450C which is considerably higher that diesel yes, but easily achievable in higher compression engines. I'm not talking about every engine - never have been - but in some diesels that do have sufficient compression you can use propane directly.
Click to expand...

Yes i know about it. And i am not talking about some diesels i am talking normal road going cars. What normal diesel vehicle would have that kind of compression ratio?
 
wammers said:
LPG needs to be ignited it is not compression ignitable. So they were using the idle fuel as a sort of spark.
Click to expand...
Yes. also the public transport buses in some Australian citys are run on Methane (CNG) but they are highly modified with lower compression ratio and spark plugs are fitted.
I have also seen Methane fueled vehicles in Russia but they need a lot of gas tanks as the gas is not liqid even though its compressed to about 6000psi also do not park under a building as Methane is lighter than air and will be trapped under the roof if leaks unlike LPG which is heavier than air so if that leaking when parked over a drain and leaks could blow the s*** out of you if ignited while you on the toilet.
 
You must log in or register to reply here.

Similar threads

MikeFl4
P38A Possible coolant in oil
Replies
9
Views
944
Datatek
Datatek
Graculus
L405 Engine oil leak / fumes in cabin
Replies
10
Views
2K
marjon
marjon
James.w.f
3.9L EFI coolant leak out of clutch drain
Replies
1
Views
783
James.w.f
James.w.f
Flossie
P38A On going leak off issue, driving me mad!
Replies
14
Views
1K
Flossie
Flossie
M
L405 2018 oil cooler replace /leak cost
Replies
1
Views
1K
marjon
marjon