Lpg Conversion..is it worth?? VY EXEC

[matt 7650]

hey guys,
i am new with just comm.
just wondering if someone can help me,
i want to convert my vy exec to lpg.
is it worth? and
what will happen to my engine and
will i be getting the same power?

please help me!!!!!

[blownba]

I reckon it is.
With liquid injection you will have more power than petrol (see this months street machine it has a good write up on the JTG liquid injection systems I fit)
Or vapour injection is still VERY good, fair bit cheaper but no power loss no chance of backfire and perfect running with excellent engine longevity due to perfect fuel delivery not allowing the mixtures to go too rich and run the engine valves too hot and burn them prematurely.
Liquid injection is said to increase engine life more than any other system available and some reckon more than petrol due to the fact that it sprays the freezing LPG on the valve running it super cool increasing life.

OR go for a Impco factory conversion ( I have a kit in stock at the moment).
This is also a great conversion for VY.
It is the factory kit only that will intergrate the dash and petrol ECU with the LPG system. We program the dash and ECU to LPG spec so it will display the LPG tank picture on the dash when on gas and the gas level will be on the petrol gauge when running on gas.
the beauty of the factory system is that the factory ECU runs the gas system totally. So it has a different map or tune for LPG and this will maximise performance.
NO other mixer system will intergrate with the factory ECU OR the dash.
And you have piece of mind with Holden backing and a excellent warranty.
I have one of the last few kits left, it is for a wagon but getting a sedan kit is easy.
If you are interested you can PM me.
I can sell just the kit only even without the wagon tank.

[matt 7650]

hey dude, thanks for the post.i will pm u right now.

[anonymousmoose]

I had my VX V6 on LPG, save a lot of money (especially when fuel was at 1:40ish) and noticed almost no difference in power. Also this was an older LPG system, not like the ones now.

Put my V8 Caprice WK on LPG after I bought it. Drives great!

Also, the VY can fit a less expensive system on the ecotech motor which the VZ cant. If you go for that one, you'll get most of it covered by gov rebates. If you lived in WA, it will be virtually free system.

[Marlon1]

I reckon it is.
With liquid injection you will have more power than petrol (see this months street machine it has a good write up on the JTG liquid injection systems I fit)
Or vapour injection is still VERY good, fair bit cheaper but no power loss no chance of backfire and perfect running with excellent engine longevity due to perfect fuel delivery not allowing the mixtures to go too rich and run the engine valves too hot and burn them prematurely.
Liquid injection is said to increase engine life more than any other system available and some reckon more than petrol due to the fact that it sprays the freezing LPG on the valve running it super cool increasing life.

Your right there mate. I've read up on this brand new Direct Liquid Injection technology and i reckon it will help the fuel situation for another 5 years. Formulated in Italy by an Italian company they managed to finally make the Liquid stay into liquid even when it reaches the engine. With LPG the liquid always turns into gas when it gets too hot and so it expands into gas from the liquid. When a gas tanker puts LPG into the pumps at petrol stations you'll see all this smoke come from the ground, this is a great example.

I've heard rumours about this new system being able to increase power of up to 3-4kw faster than a petrol engine. Holden and Ford have been testing it apparently and because it takes longer to burn than a normal petrol or LPG engine it saves money. One rumour i've heard was that it cut $20-$30 off the Clubsport R8 a week.

Correct me if im wrong but this is what i've been told. It's still new to me this technology. The Government should look into this and hopefully make rebates on this advanced technology.

[holdensupporter2005]

I had my VY done back in February. I had a Romano SVI kit installed.
I get around 600 - 650km to a tank of gas and no power difference as far as I can see.
The SVI kit starts on petrol and switches over to LPG when the engine reaches
a certain temperature (I think about 40'c). So you will need to keep your fuel
tank at least a quarter full. My installation cost $4200 and I got $2000 rebate
from the government 2 days later in my bank account, so I was happy.
It costs about $35 - $40 to fill tank of gas, which is a considerable saving from $95 - $120 for fuel.
Definately worth doing, only wish I had done it ages ago.

[crewsy]

i had an ecotec with a normal mixer style system on it and even after replacing leads and plugs and all, it would still backfire every now and then which got annoying considering it was killing my airbox. if your gonna get it done, i would go liquid injection or none IMO

[anonymousmoose]

Another option you may want to consider. When I had my VX the LPG tank took up about half of the boot space. On the WK what I did was pay a little extra and I got a donut tank put in where the spare wheel was to go. What happens when you get a flat tyre? Well to solve this issue I got a $20 run-flat-it consisting of a can of foam. If my tyre goes flat, I pump in the foam which gets me home to my spare tyre or a the nearest tyre shop.

Plus if you go on long trips or holidays, all you need to do is put the spare tyre in the boot.

Talk to your LPG installer about this option. My WK's boot looks as if there is no LPG and its will also be better for resale (i think).

[blownba]

Your right there mate. I've read up on this brand new Direct Liquid Injection technology and i reckon it will help the fuel situation for another 5 years. Formulated in Italy by an Italian company they managed to finally make the Liquid stay into liquid even when it reaches the engine. With LPG the liquid always turns into gas when it gets too hot and so it expands into gas from the liquid. When a gas tanker puts LPG into the pumps at petrol stations you'll see all this smoke come from the ground, this is a great example.

I've heard rumours about this new system being able to increase power of up to 3-4kw faster than a petrol engine. Holden and Ford have been testing it apparently and because it takes longer to burn than a normal petrol or LPG engine it saves money. One rumour i've heard was that it cut $20-$30 off the Clubsport R8 a week.

Correct me if im wrong but this is what i've been told. It's still new to me this technology. The Government should look into this and hopefully make rebates on this advanced technology.

I think you may be talking about indirect Liquid injection (indirect is injected into the port like petrol) direct injection for LPG (liquid injection of course) is on its way, and in Italy they have already started fitting it, we will have it later this year. It will obviously only be available in direct injection petrol engines, as we will be seeing more and more of these in the near future.
I have been fitting liquid injection by Icom since the begining (in Australia) and have had nothing but perfect customer feedback and satisfaction.
The last VE 6.0L I did gained a massive 12.6 RWKW!!!!!!! and a huge spike in Torque at 2100rpm of 106NM!!!
I haven't dynoed a V6 yet but I would be willing to bet at least a 3-5 RWKW increase in power with at least 60NM more of torque down low.
These figures can be optimised by a tune of course.

If you want to know more about the Icom JTG liquid injection systems I am talking about grab a copy of this months street machine and have a read. there is a full 3 page spread on it in there.

The only drawback of this system is the price.

[kalu]

hi blownba ,


have u got another lpg factory kit for a vt/vx?

[dah_man_ben]

We had our VT done with a Holden IMPCO system done back in 2001, still going strong (they did the heads and all with hardened valve seats etc) and sounds as clean and well running as my VY Berlina without LPG.
We also got the same kit done to the VY but without the hardened valves in 2007... it has developed a ticking noise as they do but still seems to be running strong. My step dad's VY has factory gas which appears to be the exact same kit... that is now up to 240,000km and running perfect.

On the other hand of all of this, I had a dodgy aftermarket setup on my VS Berlina done a few years ago, and was constantly backfiring despite tuning and doing leads, plugs etc. I ended up just running it on petrol in the end.

In both models, the integrated LPG is excellent (shows LPG on the dash, proper button for switching and has distance to empty). They both retain power really well. I was considering it on my VY Berlina but I may leave it for now until petrol goes up a bit more. I think that if you are going to convert your car to LPG, you might aswell go for the whole factory thing because I can tell you from experience that it runs the best. I understand that this new liquid injection stuff is reasonably good (my dad has it on his VE) however I don't know how the ECOTEC's valves and stuff will cope with it?

Ben.

[Sean880]

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[obnoxious_boy]

Hi,
Just had my WK Caprice GEN111 converted to LPG Liquid Injection.
Well.... IT KICKS ASS!
I would estimate 10-15% increase in power.
Definitely worth it

[exquisit]

for those of us reading it this year... any one have the issue blownba is refering to and would be kind enough to post up a scan?

[Holden_Man]

Converted an MQ 82 Nissan Patrol with a 283 Chevy V8 back in 04. Tank capacity, 88 usable litres and depending how I drove it, 500 - 600 kms per tank. I only paid around $40 a tank at the bowser. I know it costs a lot more now, but I thought $1,650 was money well spent.

[MaxM]

I reckon it is.

OR go for a Impco factory conversion ( I have a kit in stock at the moment).
This is also a great conversion for VY.
It is the factory kit only that will intergrate the dash and petrol ECU with the LPG system. We program the dash and ECU to LPG spec so it will display the LPG tank picture on the dash when on gas and the gas level will be on the petrol gauge when running on gas.
the beauty of the factory system is that the factory ECU runs the gas system totally. So it has a different map or tune for LPG and this will maximise performance.
.

Can you please tell me if the Impco system causes backfiring occassionally on a VY Series 1 Commodore acclaim? Is it better to go with a say Romano Vapour injection sustem if you can afford one? I am tossing up between the two and for the most part I dont care about slight power loss becasue I drive more like a granny. What I dont want is a large sound going off every now and then.

[dah_man_ben]

Can you please tell me if the Impco system causes backfiring occassionally on a VY Series 1 Commodore acclaim? Is it better to go with a say Romano Vapour injection sustem if you can afford one? I am tossing up between the two and for the most part I dont care about slight power loss becasue I drive more like a granny. What I dont want is a large sound going off every now and then.

Impco system CAN backfire due to it being a mixer system naturally, but if you have a qualified and experienced person who tunes it, you will find it won't. Our VY and VT both have IMPCO systems on them, and run like an absolute dream. The VY was backfiring in the beginning but after having a proper tune by someone who knows what their doing, the beast hasn't backfired since.

[MaxM]

Can someone suggest a good conversion specialist in Brisbane? The prices seem so much dearer in Brissy than in melbourne.

[adammada]

I have a vy series II on an impco gas system and im pretty stoked with it.It has backfired once in 3 years that i have owned it.got it tuned and its running pretty sweet at present.around 35 bucks to fill the tank.450kms around town and approx 700 on the highway.