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Toymods Club Treasurer
Location:
Sydney
Registered:
May 2002
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Gaseous LPG Injection
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Fri, 12 March 2004 01:40
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Has anyone else heard of this?
Its where LPG is injected into the manifold with one injection for each cylinder (like MPFI) instead of normal single point (carby) LPG, and controlled by a computer.
I'm looking at doing petrol engine transplant & want to keep the low running costs of the current engine but with more grunt.
Don't want to use normal LPG because doesn't give as good economy while cruising (closed loop is not as good)
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 02:44
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yes.
yes..
closed loop can be good, i know that the Impcos give better ... everything since they are manifold referenced, and the closed loop systems aint that bad 
there are some ppl using Megasquirt to control LPG port injection. not sure what they used for injectors tho..
problem with lpg port inj is that it may not mix so well with the air (but i guess it can't be any worse than petrol )
hmmm. will be interesting tho 
Cya, Stewart
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Location:
Brisbane
Registered:
May 2002
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 02:59
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I was under the impression that research into gaseous LPG injection had been all but abandoned because it's nearly impossible to accurately meter the fuel in gaseous form. There are companies out there working on liquid LPG injection which seems like a better idea to me, but last time I looked into it they were still having problems getting it reliable.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 03:08
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doh, i'm stoopid, forgot to read title properly
MS ppl are doing LIQUID LPG injection, not gaseous.
i'm not sure there would be that much to be gained from doing port gaseous injection, since with a good convertor and mixer, and good runner design, you already get quite good mixing and distribution.. especially compared to petrol, which mixes very poorly.
Cya, Stewart
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Location:
Melbourne
Registered:
August 2003
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Location:
Melbourne
Registered:
May 2002
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 06:10
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Hmm i have also heard about a liqufied LPG injection system up and running in sweden or some shit, supposed to be mega $$$$$$$ aswell.
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 07:25
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google this
there are a few mobs that have given this a go in liquid setup - sungas seems to ring a bell.
i run a ta22 with 4AGE and gas research throttle body. this is my second car with LPG and i'll be starting on my third car with LPG soon (VH with 308)
indeed speak with mrshin - he is working on this exact setup for his turbo sprinter...will be interesting to see how he goes. where are you shinny?
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Toymods Club Treasurer
Location:
Sydney
Registered:
May 2002
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 09:51
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I don't know if called this the right thing.
There are real advantages in giving each cylinder it's own fuel, no starvation, timing, etc.
As I'm going to be converting my car from diesel & fwd to 4wd, I've got to change the fuel tank anyway. So, may as well ditch the fuel tank altogether & put the LPG tanks there instead.
I've also gotten used to doing 700+km on $50, so would like to keep this fuel down after the conversion.
I also want to add forced induction later, either supercharge or turbo (probably supercharge as it will be a lot easier to do to the engine I'm thinking about) & I don't like the idea of having fuel passing through the supercharger (particularly LPG).
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Gaseous LPG Injection
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Fri, 12 March 2004 10:13
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*finally appears from hiding place*
Yes, this is something I'm playing with right now, should hopefully have some results before TOO much longer too, just need to find time to put engine back into my car, then it's time to do some serious playing  PM me if you want to know specifically about it
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