LPG injection systems - Looks interesting!

[Morgenster]

It's actually a $1000 dollar rebate on the cost of the installation of the gas system.

it is in place already here in W.A.

I've been told by a gas fitter that I cannot fit gas to my 535 due to the type of management system fitted to my car (stock) and that if it ever back fires the AFM vane will shatter when the backfire slams it shut.

Odd, there's solutions to that as well. Backfire doesn't really occur unless your valves don't shut properly or you have charcoal in your cylinders. If all else fails there's always an extra 'backfire valve' that can be installed between the intake manifold and the throttle housing. Lots of Dutch cars have those.

Anyway I've seen many M30's equipped with an LPG aspiration system. They work fine.

[Ausmpower]

Odd, there's solutions to that as well. Backfire doesn't really occur unless your valves don't shut properly or you have charcoal in your cylinders. If all else fails there's always an extra 'backfire valve' that can be installed between the intake manifold and the throttle housing. Lots of Dutch cars have those.

Anyway I've seen many M30's equipped with an LPG aspiration system. They work fine.

What system are they running?

Australia relies on draw through single metering gas systems (Impco) as they are the most common and one of only a few ADR (Australian Design Rule) approved systems.

Does your m50 start on pertol or is it gas only?

Gas systems can backfire when starting cold, not due to valves not closing, but the slow combustion of over rich gas/air mixtures burning back into the manifold.

Ford and Holden 6 cylinders from 96-2003 here were renown for blowing the airfilter boxes apart if they fart when cranking.......And they're factory systems!

[skr]

come on people, everybody likes LPG??? Those prices must have realy scared you. I've been paying 1.2 $ for diesel for some time now, gas is like 1.4 but i'd never consider it. big ugly tank in the trunk+ringing it at much fewer km doesn't realy sound good... Maybe it's just a national thing but around here car passionates hate lpg

[BillionPa]

or you could run gas/lpg in 66/34 ratio, you would spend less on fuel and not need as big a propane tank. and I think there is some optimal ratio that gives a good increase in power, but thats probably not it.

[Morgenster]

What system are they running?

Australia relies on draw through single metering gas systems (Impco) as they are the most common and one of only a few ADR (Australian Design Rule) approved systems.

Does your m50 start on pertol or is it gas only?

Gas systems can backfire when starting cold, not due to valves not closing, but the slow combustion of over rich gas/air mixtures burning back into the manifold.

Ford and Holden 6 cylinders from 96-2003 here were renown for blowing the airfilter boxes apart if they fart when cranking.......And they're factory systems!

Well that's something you don't get to choose here. There's no way any singlepoint system will let you start the car without hassle. Especially in winter because the vapouriser would just freeze up. Technically, an LPI system will let you do it, but the only safe system for starting on LPG is liquid injection which is patented by a single company and needs a big push in marketing.
Starting on a singlepoint LPG system will flood your manifold with LPG gas for the time you're cranking and that's a surefire way to get into trouble.

I run a singlepoint system but always start on petrol, let it warm to center mark and then switch to LPG. It won't switch (automatically) before hitting 3000+ rpm. After that you can let it idle of course.

I have an LPG tank of some 70L in the spare wheel well that lasts me 400-500 km before refuelling.

As far as financial benefits go: 1.48 euro is the pricepoint for premium petrol fuel here. LPG is at 0.43 euro. Do the maths considering I drive 3000 km a month.

Edit: The M30 engines I've seen use the same type of system I use.