Lpg Subarus

chriSTIan · Post by **chriSTIan** » Mon Aug 18, 2008 11:00 pm

Hi
Does anyone on this board running lpg on their liberty?
Looking at a dual fuel system with a gas carby set up,apparently the problem is the idle circuit will not work as it is when on gas.
I want to run gas so that when i install my s/charger i won't need an intercooler.
Chris

AlpineRaven · Post by **AlpineRaven** » Tue Aug 19, 2008 8:41 am

yes there are couple of ppl in here that are running on gas. I think it does run on gas on idle, but when you start it up, it runs on petrol then switches over to gas-
Cheers
AP

steptoe · Post by **steptoe** » Tue Aug 19, 2008 9:32 am

maybe expand a little on your rumour about idle circuit not idling ??

Let the bods you talk to know you intend to supercharge it, year model ie 2004 onwards requires emission certified kit, plastic intake manifolds need to be injected vapour or liquid to elimnate chance of manifold blowing chunks out if ever a backfire

chriSTIan · Post by **chriSTIan** » Tue Aug 19, 2008 8:37 pm

Ok its for my gen1 wgn 2.2 n/a
As far as i know the idle circuit which is needed when runing on ulp,becomes a problem when u switch to lpg,since i want to use a gas carby that will give me idle when on lpg,the factory idle circuit needs to be disabled.
Any thoughts?

steptoe · Post by **steptoe** » Tue Aug 19, 2008 11:04 pm

OK.Know nothing about your concern. You plan on using a gas carby like Impco, rather than a mixer ring ? The gas carby in a dual fuel set up usually takes up more room, takes more fit up engineering than slotting in a mixer ring into the intake ducting. Systems such as njectors and electric fuel pump are diasbled via relays on switch over to LPG by your changeover switch. Surely if the idle circuit in the 2.2 is different to other makes it will take an auto electrician an extra relay to shut of any electric control of idle curcuit of the petrol side when on LPG

seagull · Post by **seagull** » Wed Aug 20, 2008 1:02 am

I follow a Ej22 liberty to work just about every day has a LPG sticker on the number plate .

gx_rex · Post by **gx_rex** » Wed Aug 20, 2008 10:03 am

There is a guy in canningvale that runs lpg only in his lib. It is do-able.

chubby37 · Post by **chubby37** » Wed Aug 20, 2008 10:50 am

it can be done easy and still run full injector setup same as on petrol....using the injectores gives better response and fuel economy....my mate and i were talking about it the other week...i,m not up on LPG but he has an engineering background and says it works without have to run carby setup...i can try and find out more or get his msn so you can chat to him

AlpineRaven · Post by **AlpineRaven** » Wed Aug 20, 2008 12:23 pm

suberman has lpg in his liberty, as far i know its running well. He got it fitted not long ago.
Cheers
AP

vincentvega · Post by **vincentvega** » Wed Aug 20, 2008 1:42 pm

I am also very interested in hearing from someone who has actually done it.. specifically running something like a EJ20 or EJ22 on gas using an injected setup.

chriSTIan · Post by **chriSTIan** » Wed Aug 20, 2008 9:01 pm

The gas carby set up is around $3400,if you want gas injection add another $1000.
Problem is getting donut tanks and other bits is hard to find around here,rang around 2day and no one had any tanks.
I guess if u don't own a falcodore u r on your own.
Will keep looking.

steptoe · Post by **steptoe** » Wed Aug 20, 2008 10:45 pm

Wreckers can be a good source, some don't even know they have them. The tank has a date stamp and neds a 10 year inspection costs about $75 on ebay in Gosford to about $150 depending who does it and what else it needs to pass. The trick will be to find a donut that fits your spare wheel well

Tanks appear on ebay as well as a lot of other gear

If you get 3000 rebate in WA the conversion to injection will be a bargain!

Subafury · Post by **Subafury** » Thu Aug 21, 2008 12:15 am

whats the power difference (if any) switching to gas? i wonder how sturdy the tanks would be if fitted under an offroader- on dedicated gas. The rebate is tempting. girl at work with an au only paid $200 out of $3200 for her dual fuel system.

gasfreak · Post by **gasfreak** » Thu Aug 21, 2008 6:36 am

Have 4x L series 4 x 4 wagons plus 1 x Brumby ute. Want to convert the lot to gas-. We use them a service vehicles. Any suggestions welcome. Don't need to be dual fuel. All 1.8 engines.

AlpineRaven · Post by **AlpineRaven** » Thu Aug 21, 2008 7:47 am

steptoe wrote:Wreckers can be a good source, some don't even know they have them. The tank has a date stamp and neds a 10 year inspection costs about $75 on ebay in Gosford to about $150 depending who does it and what else it needs to pass. The trick will be to find a donut that fits your spare wheel well

Tanks appear on ebay as well as a lot of other gear

If you get 3000 rebate in WA the conversion to injection will be a bargain!

Yeah I agree.. Ive seen a couple at the wreckers even donut tanks (you're lucky if its full!) and you'll need to go to wreckers everytime they bring a "new" car in and for you to grab it... It pays it off by going there a lot - this is what I used to do - go there 2-3times a week and these guys thinks I live there!
Cheers
AP

AlpineRaven · Post by **AlpineRaven** » Thu Aug 21, 2008 7:49 am

Subafury wrote:whats the power difference (if any) switching to gas? i wonder how sturdy the tanks would be if fitted under an offroader- on dedicated gas. The rebate is tempting. girl at work with an au only paid $200 out of $3200 for her dual fuel system.

Power difference... You'll loose some power on some areas.. such as going up hill, towing and acceleration. But gas is good enough for cruising. Work car has gas, if I have heavy load I have to use petrol to take off or hilly areas, bec its gutless on gas.
Cheers
AP

vincentvega · Post by **vincentvega** » Thu Aug 21, 2008 10:42 am

from what I have read there is not necessarily a power loss with injected systems. Its the old carby setups where you suffer?

chriSTIan · Post by **chriSTIan** » Thu Aug 21, 2008 7:05 pm

From what i can gather from talking to a few gas fitters,a gas carby if for gas only conversion,very good set up,if you want dual fuel,you fit a mixer ring b/w inlet manifold and throttle body.Less accurate but still a good compromise.
Vapour injection is more suited to later injection cars and costs an extra $1000 more than mixer conversion.

steptoe · Post by **steptoe** » Fri Aug 22, 2008 9:22 am

a mate has vapour injection Landi Renzo system on his Maloo ute 185 kW and we actually think it has developed more power and torque than on petrol , so if power is the main concern/need vapour injection is the way to go. So much so, after the tuning run with my eyes supposed to be on the laptop and his on the road, I now hesitate to go on test drives like this - I prefer him to watch the road and not the puter screen !! especially in built up areas and um a little more than the posted speed limit

iThe L/R injectors at idle sound like rooted lifters with all their slow clicking. The best injectors are thought to be the Prins Keihin going for more than 1100 bucks for just eight injectors

steptoe · Post by **steptoe** » Fri Aug 22, 2008 9:26 am

tank fitment re ASNZ1425:2003 and earlier..there is set clearances and protection requirements. Angle a stick from bottom rear of rear tyre, lift other end to rear of body line and tank must fit above this line. With a rear diff, petrol tank and L series toolbox you'd be hard pressed to get any more than a camping bottle in there. Petrol tank removal and toolbox mods wel maybe, trial and error

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