What LPG system to get on my new VY V6 Series II Wagon?

[b3h3m07h]

Just got a vy wagon series II with 74k on the clock and im looking to get LPG on it but im unsure of what type of system i should get, Mixer, Vapour Injection or Liquid Injection? I will be keeping the car for quite a while so id rather invest in a good system which will give me great economy and minimal power loss. Also if anyone knows of a good installer in South Australia please let me know. CHeers

[krizza]

I'm happy with the mixer system on my VY, but there is no comparison between an injection system and a mixer when it comes to economy and performance. My mixer system uses about 15L/100km daily driving and you notice the performance increase when you switch back to petrol, particularly on full throttle.

I say if you can afford the extra couple of grand get a liquid injection system.

[johnnyk]

I've had my V8 VY Monaro setup with liquid gas injection (JTG) running happily for the last 50,000's. Better on lower end torque too

[GAMBLR]

Either vapour or liquid injection if you can afford it. My VZ uses vapour, still retain 98% power and uses little to no more than normal petrol. Liquid is even better from what I've heard more power and even better economy.

[Brados]

I have mixer on my VY ute, i just keep a tank of Premium in the fuel tank for when im feeling like some more power and to give the engine a clean.

Also when you do change back to petrol you notice the slight power you have been missing and its so much more fun to drive.

Basically have to think about is the cost your going to save outweigh the more expensive setup. Its a lot of money you can save just to pay for Petrol. As the sole purpose of LPG is to save money.

[tymes]

Ive got an icom JTG liquid injection on my cross8 crewman with a tune, duel fuel runs two sets of tables, one for gas and the other for petrol. Big increase in torque on gas. Runs like a dream compared to how it was on petrol when i got it. I was thinking the same as you about keeping the crewman for a while so im glad i spent the extra money for the liquid injection
Also have a mixer on my old 5L duel fuel VS ute. It has a bit of power loss on gas compared to petrol.

[sleepa]

Ive got an icom JTG liquid injection on my cross8 crewman with a tune, duel fuel runs two sets of tables, one for gas and the other for petrol. Big increase in torque on gas. Runs like a dream compared to how it was on petrol when i got it. I was thinking the same as you about keeping the crewman for a while so im glad i spent the extra money for the liquid injection
Also have a mixer on my old 5L duel fuel VS ute. It has a bit of power loss on gas compared to petrol.

Is the liquid injection worth the extra money over vapour injection?

If you just want a cheap car to drive around in get the mixer, if you want better fuel economy and power and you plan to keep it for a few years at least then get the vapour injection.

[b3h3m07h]

thanks for your input guy's. i got a call from the installer today and he said that i can book it in but im trying to decide on what tank to get, the 50l fillable or the 60l fillable. does anyone know which one will fit in the spare wheel bay without having to modify the floor in the back of the vy wagon?

[jr689]

Hey mate just got a vy commodore too and will be looking into getting LPG for it this month. Just out of curiosity so I can be prepared for what I'm up for, how much did you get qouted for the mixer annnnnd for the vapour injection, was there a big difference? And I'm also keen to know what tank will fit in the spare tyre bay and if this costs any extra over just chucking it straight in the boot, cause I don't really want to lose any boot space. Cheers!

[sleepa]

The spare tyre tanks do cost more than the regular tanks, but you have to remember that the spare wheel still has to go in the boot still. And the tyre tank is smaller than the regular tank. The normal tanks don't take up that much space, you just can't put the seats down and carry long things anymore.

[jr689]

The spare tyre tanks do cost more than the regular tanks, but you have to remember that the spare wheel still has to go in the boot still. And the tyre tank is smaller than the regular tank. The normal tanks don't take up that much space, you just can't put the seats down and carry long things anymore.

Yea that's true, I'll probably just get a space saver tyre for the spare (and hope i never have to use it) and strap it down somehow... I surf so chucking the board through the car with the rear seats down is the way to go, cause roof racks are pure hassle imo

[sleepa]

You know those space savers aren't too bad, I have used some a few times, 80km/h max speed though. But at least they remind you to get the tyre fixed

[ITALYY]

Lmaoo true

[b3h3m07h]

i ended up calling the lpg warehouse and having a chat to a guy there about the tanks and he said that the biggest donut tank for a vy wagon is 50L fillable for the jtg liquid injection but if you were to go a mixer or vapour system i believe a 60L fillable is the max. ive decided to go ahead and get the JTG system as my vy has low k's, only 75000, and im going to keep it for at least 5 years plus the advantages in power, torque and engine life swayed me in its direction. Cost for the system is setting me back $5350 then i get the $1500 rebate and with the traveling i do each year it will have paid itself of in 2 years. Im also thinking of getting a tune done on it too take advantage of the higher octane fuel but still be able to run it on pulp or 98 ron. I have been quoted $990 for the efi live system, licence and dyno tune, is that an ok price or could anyone recommend someone in sa that could help me out?

[jr689]

**** that seems like a fair bit of coin you still have to fork out on your behalf even after the rebate!!! What's the cost difference over the vapor system cause is it really worth it mate, surely they'd all be the same on engine life wouldnt they... What do taxi's run, they are clocking up in excess of 500,000km's aren't they???

[GAMBLR]

I was told the Vapour system on my VZ was about $5500 (two years ago), so I'd say that's a fair price. Sounds great, post up some results after you have if done. Very keen to see how much difference there is between vapour and liquid.

[byrnn09]

i recon liquid

[b3h3m07h]

I did ask about the vapour systems and they were only around $1000 less so i did my research and alot of people were saying the liquid was worth the extra dosh and better for your valves because its being sprayed as a liquid form (cooler) not as a vapour (hotter) so in a way it would be lubricating everything. i have it booked in for the install in a few weeks so i'll keep you all updated on the economy i get from it. i just did a run at 60km/h and 80km/h just before and had figures of around 7.0 to 7.5l/100kms, flat straight road, 20 min drive, so hopefully, going by what ive read, i should get around 9.0 to 11l/100kms in the same conditions.

[Syntaxtt]

I just got my VZ Executive done today with Vapor Injection it cost me just $3800 from EZYgas and they even do interest free for 6 months so it worked out well especially once you subtract the $1500 rebate the whole price is just $2300!

I just joined the forum and saw this thread and thought I'd add to it.

[jr689]

Welcome mate! I got two quotes over the weekend for the mixer system and one place gave me a price of $3200 and the other $2500... Both of them basically were straight up and honest and said they wouldn't bother with the vapour injection or liquid injection for my car, simply based on the overall cost of the car and the cost of the system just isn't really worth it. Refreshing to see someone NOT try and up-sell to me hahaha!

[Syntaxtt]

Sorry for being a complete noob but is the mixer system the same as the Ventury system? I was told that the Ventury system could be put in my car but it would cause damage over a period of time but I guess these guys just want you to buy the expensive systems I guess

[GAMBLR]

Syntaxtt, I just did a quick search and found this. It appears the Venturi system is a Mixer system.

Robey LPG Conversions Motor Mechanic Car Service and Repair Mascot St Peters Newtown Marrickville Tempe Enmore Erskineville Pagewood Alexandria Rosebery Botany Zetland Waterloo

I'm in two minds about the mixer systems. On one hands, dad's EA wagon had issues every so often with the LPG mixer system, but my brother's VN is running super smooth still.

jr689, my personal opinion is that I'd go for nothing less than Vapour injection, simply because of the newer technology and retained power/similar economy to petrol. But thats me, and having driven one, I can honestly say the extra cash is worth it for the V8 especially. Having a V6, it might not be imperative to have Vapour though.

[jr689]

Yea I know the bloke estimated that with the amount of driving I do, that I'd be looking at saving $45 for the mixer and upwards of $50 for the vapour per week... As for retaining the same amount of power I'm not too fussed as my commo is a manual and I'm of the impression that any power loss will be totally unnoticeable when driving it compared to an auto. My old man has the mixer system on his Pajero and I can't notice it one bit, but there is no denying that you do loose power on the mixer systems... However I couldn't imagine the loss being too great that a CAI and extractors (already have a catback) couldn't fix, and yea at the end of the day it's just a V6 I guess... I'm never going to get ridiculous amounts of power out of it anyways!

[Syntaxtt]

I do quite a bit of driving every week so that was the main benefit from the system I choose I think. I wasn't really thinking about performance more about the mileage per tank. I guess the no loss of power is a added bonus haha I had the Venturi system on my old car and it wasn't running very economically but I'm sure that could be due to a range of different problems