Ok so having come from my magna to a BA I've noticed a slight difference in fuel consumption... being the lead foot I am.

Therefor yesterday I went down to one of the places my work supplies LPG tanks for and asked them how much.

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"Normal system or direct injection system?"

"Uhh... what's the difference?"

"With the direct injection system you'll get better power and economy than the normal sytem, in fact our latest figures are hinting at better economy and power than normal fuel"

"Riiiight... price?"

"2100 for the regular system if you're supplying the tank or 2900 for the injection system if you're supplying the tank."

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Now to me this seems FAR to good to be true, though I'm inclined to believe the guy, either A: he's a good salesman, B: he's telling the truth or C: he's a smacktard.

now I've never even heard of this EFI for gas but I mean... I'm not exactly your everyday mechanic either.

Any comments?

Id go for the injection system. It replaces your standard injectors with ones designed for gas. Sort of like comparing the CFI and MPFI on the EA and EB falcons.

what injection system??

what he has said is true, injection delivers more power and better economy than carby setups, and you can still use your traction control.

will they give any warranty, you loose the ford engine warranty with gas install.

no, I don't loose my ford warranty and their warranty covers faults related to the LPG system.

so the injectors get replaced? Will that then effect it's fuel performance as well?

The way he explained it is that it gets to optimum performance temp and then switches to gas. if so my fuel performance won't matter to much then.

I'm so confused


msman what he was saying was that I would get better fuel economy and power than my existing system.

gas injection is single fuel only

he didn't seem to think so.

I quote:

"You'll run on petrol untill the car reaches optimum run temp and then it'll switch over, you'll never have to do a thing."

Speak to Boemo Engineering in Bayswater. They have a duel type gas injection that is giving good performance and econemy results.

not all gas injection is single fuel only, for example the parnell system, sequential vapour injection, is dual fuel.

you can theoretically get better power on gas than petrol but the entire engine has to be setup for gas, it is currently setup for petrol, like the ignition. i'm guessing the better economy part is in terms of money.

remember that gas injection has a limit of 200fwkw.
if you do not intend to go over this limit i would go for it over a carby gas system any day of the week.

remember that

yeah I'm going to AUZGAS in bayswater. I'll drop in there as well, thanks Neal and everyone else for the info

Ok. it's pretty simple how they do it.

Ya take a nice big drill and take to the cylinder.

lol. Nah they have another set of injectors that run in each cylinder. Just for those of you who where as stumped as I.

Dave.

That run in each intake runner of the manifold i assume?

You guys might be interested in this.....
http://www.prins-lpg.com/en/products/vs ... index.html

It's vapour phase and it seems it's capable of big power.
I have an article in the latest 5.0 Mustang magazine about a Procharged 4.6 stang running dual fuel with this setup. It is using eight 93cc gas injectors.

Pete.

LPG can't produce more power than petrol. It is physically impossible.

A well tuned LPG system can edge out a stock petrol tune marginally.... but throw $3000 at the petrol system in the form of an aftermarket programmable ECU and a good dyno tune and any LPG system will be wondering what the hell happened. Also, an aftermarke ECU using a wideband oxy sensor will give you great economy on petrol.

NOTHING you do with an LPG system can account for the fact that LPG has approx 10% less energy per litre compared to petrol. It's like saying you'll cover 1000km faster @ 100km/h compared to 110km/h. Sure you could make physical modifications to the engine to get back the power, i.e extractors, but those modifications will also benefit petrol aswell by the same margin, so petrol will always stay ahead.

That said, LPG is still very good. I run it on my car for the price per km. Disgraceful low down torque and top end power, but it is a 10 year old system. Just don't expect to jump in your car and shave 1 sec off your 1/4 mile time.

One other thing also confuzzles me about petrol start LPG systems. LPG is a every clean fuel and it's cold start requirements are different to petrol. My car runs flawlessly on LPG from cold. It's got a petrol start device on it, but that only works for 2.0 seconds from ignition on. One huge benefit of LPG is because it burns much cleaner @ temp, and much much much cleaner when cold compared to petrol. I can't understand why people would want to run the petrol when it's dirtying the engine the most when you car run a clean fuel from cold.

Unclewoja, you should not be so insistent that lpg will always be inferior to petrol just because it has less energy per litre than petrol.
You are neglecting the fact that lpg has a higher octane rating.

As better lpg systems are developed, they will be better able to take advantage of lpg in much the same way that electronic injection was better able to take advantage of petrol.
With better lpg systems being developed and engines designed to suit, it with it bring large gains to the lpg buying public and the performance enthusiasts at large.

In any case, most lpg systems are installed for a reduction in running costs, which the fuel is rather good at achieving, rather than for any power increase.

lpg injection (wheather liquid or sequention vapour) is not the end of development but only the beginning.
As development progresses, you may yet eat your words as lpg may end up knocking off petrol as a power fuel.
Its just an issue of development time, money and industry desire and anything can be achieved - afterall humans did walk on the moon

For now though, stock standard injected petrol versus injected lpg on a stock petrol engine and the winner is injected lpg

Go down the mod path and petrol will win easily as there are many many more years of petrol power development to draw upon.
It will be some years away before the real benefit of lpg can be seen in the performance world.

As for lpg start issues, coolant is used to stabilized the converter tempertaure to avoid freezups when starting from cold on a cold day and driving off with a heavy foot, hence many designs will run on petrol until the coolant is warm enough.
Cleanliness is sacraficed for reliability for this short time

Till the day of performace lpg, enjoy your 10 yo lpg car and the savings it gives you

Cheers, Itchione

Hey guys, every person has a different opinion on lpg. My old man works for Boemo engineering (Bayswater is the only for holding stock, abbotsford is ford installations) you wouldnt go fitting aspirated into a ba as they had trouble doing this in the first place. The cars back fired etc* the gas injection systems are great, expensive but great. I was just speaking to him today about him fixing my car (doesnt have much time ) but we came across this into conversation. they have only been fitting injection in the ba for just over 12 months now and the car has over 300,000 k's on it and been running on gas since new. Who ever you get to fit your system, dont go aspirated it will cause you alot of problems in the end. If you are interested in speaking in more detail abouts this call Boemo abbotsford and speak speak to paul or david im sure they will explain it to you. Just thought id add that in (y) good luck with what ever you decide.