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Home > A-Series EFI / Injection > LPG.

KLAS

89 Posts
Member #: 2380
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Hamburg, Germany

yes, all vapor injected systems uses the tank pressure (and a regulator/vaporiser to hold a steady pressure).
a venturi system could only work as suck-through system with boost.


On 21st Jan, 2011 stevieturbo said:
But the modern vapour injection systems dont use a pump ? They just rely on tank pressure, no ?

And I am talking about LPG injection on a Mini. Not an old Venturi system. Most as I am talking about using it with boost, with proper gas metering.
Or could a crude venturi system work on a boosted application ?


Asphalt

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509 Posts
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Germini, black forrest

On 21st Jan, 2011 KLAS said:
yes, all vapor injected systems uses the tank pressure (and a regulator/vaporiser to hold a steady pressure).
a venturi system could only work as suck-through system with boost.


Would this be less troublesome than sucking through a fuel mixture? I guess there are no troubles like fuel separation on a suck-through setup? :)

Cheers,
Jan

[X] nail here for new monitor


evolotion

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2909 Posts
Member #: 83
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Glasgow, Scotland

surely then a "wet manifold" style system, but using gas injection would get over the mixture issues? as the slugs would have more time to mix..

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


jbelanger

1267 Posts
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Montreal, Canada

On 21st Jan, 2011 evolotion said:
surely then a "wet manifold" style system, but using gas injection would get over the mixture issues? as the slugs would have more time to mix..

I guess so, as long as you inject 4 times per cycle. But I don't know if that's an issue to have that many pulses for those injectors. From what I remember seeing, these are not very fast acting injectors so you may need to use more than one and alternate between the 2.

Jean

http://www.jbperf.com/


manifold

203 Posts
Member #: 1734
Senior Member

Lancaster

will a wet manifold system work, after all LPG is, well, a gas? its not wet (or a liquid) once its gone through the vapouriser.


evolotion

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Glasgow, Scotland

its a turn of phrase to describe a maifold(or runner) pre-filled with the air-fuel mix as opposed to discrete injectors firing the fuel in right at the port entrance, hence the " .. " :)

Edited by evolotion on 21st Jan, 2011.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

when I looked at LPG i was looking at using megasquirt to control the fuel, (simple) as MS has the ability to switch to another fuel and spark map so you can have one for petrol and one for LPG,

the harder part is the gas plumbing and evaporator.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



stevieturbo

3588 Posts
Member #: 655
Post Whore

Northern Ireland

So basically use a typical set of remote manifold mounted injectors, with their gas outlet aimed at a single TB, in a "wet" style of injection.

Timing should become less critical, and mixture distribution should be fairly good..

It may even be easier to stage groups of injectors if needed ?

Or for a port injection system.

Maybe the remote style of mounting with the actual nozzle seperate might work better. Not sure how big it needs to be, but it might make it much easier to aim the "fuel" directly at the appropriate intake valve ?

Edited by stevieturbo on 22nd Jan, 2011.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


tadge44

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Buckinghamshire

Just looked at this thread and thought that I would throw in that we have an A35 club member running his car on propane. He just put a propane cylinder in the boot as a fuel tank !

I wont drive anywhere near his car as I think its a bomb waiting to go off, judging by the quality of the installation. But then he.s the sort of guy who runs around with only two wheel nuts on each wheel because he says its easier when you come to change the wheels.


stevieturbo

3588 Posts
Member #: 655
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Northern Ireland

LPG is just Propane.

Although I would fit a proper tank lol.


I can recall years ago seeing black taxi's knocking about with yellow calor gas cylinders hanging out of the boot. I think that's Butane though ?

they had been running a petrol engine on this gas ( long long time ago ! )
No idea how good or bad they were. But probably pretty bad. They must have known someone who got the gas for free or something.

Edited by stevieturbo on 22nd Jan, 2011.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

yes

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/


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