Propane FI

[dn]

In reply to Angus:
 
> Don't give up here either. I run a locally designed and manufactured
> LPG carb, not a mixer, but a fully metered carb in a LPG only setup and
> it can be tuned as nicely as you want it.

Sounds great, but it'd probably cost me more to ship it over than it's worth!

> I am sure they use an in tank pump to boost fuel pressure so a tank
> return is possible. I think from memory that the tank pressure is lower
> than the figure you are quoting and the fuel rail pressure is about what
> you suggest. 

Liquid propane pressure depends on ambient temperature.  The figure I quoted
is probably the highest you would normally encounter, it decreases with temp
until it reaches 0 psi somewhere around -45 degrees C.  Most LPG systems
must be rated to a test pressure of 250 psi.

> The system this company has designed as a prototype is on a port fuel
> injected inline six. They use a local after market fuel injection computer to
> control the injectors. The duty cycles were very different to the
> gasoline injectors. I will have to look up the article to find out what
> the injectors were like; modified or exotic I can't remember.

I'd be interested in any data you have on the injectors, if the article is
available in digital form you could squirt it over to me, if not give me
the title and publication data and I may be able to find a copy locally.

> $1200 and I thought that $AUS300 was steep for mine! 

Ahh, but it had to fit under the body of a Camaro... non-standard tanks
are much more expensive than say, one that fits in a pickup truck...
 
> Likewise, I had my dizzy recurved but I am not happy so I am toying with
> the same idea; HC11 spark control.
 
Stay tuned!

Regards, dn


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