M35 Stagea Dimensions For Lpg

[iamhe77]

yes because fuel prices should go up some more!

conspiracy theroies anyone?? lol

how do you fill the LPG tank in the spare wheel well? do they plumb it outside the car like they did with fords and holdens? or do you just open the boot?

On most LPG setups, they put the filler next to the petrol one.

Seems to be enough space in the M35 one.

[ironpaw]

Sage222 - can you confirm whether you can switch from LPG to Petrol using a switch? If you run out of LPG does it go on Petrol automatically?

[Sage222]

they put the filler just below the factory petrol. it will automatically switch to petrol if you run out.. there is a button on the LED LPG gauge though not sure if you can manually fail over to petrol ive never tried pressing it

[iamhe77]

Nice. A VQ25det powered M35 that that can easily make it from Melbourne to Sydney without stopping.

[Sunkist]

if you tuning the car with an emanage the automatic change over will need to be disabled as the tune will be fuel specific.

At an auto change the engine could run lean and then pop goes the weasel

[zei20l]

doesnt the factory ECU remain on when its in LPG mode?

wouldnt you just get the emanage tune on petrol then have the LPG conversion done as per normal?

[iamhe77]

doesnt the factory ECU remain on when its in LPG mode?

wouldnt you just get the emanage tune on petrol then have the LPG conversion done as per normal?

My thoughts exactly.

Or you could get 2 tunes on your emanage and flick to the petrol tune when you run out of LPG

[zei20l]

even better

but doesnt the LPG have its own 'ECU' to tune to the car? i guess it just uses RPM and AFM inputs for the injection signal?

[iamhe77]

Nope. The lpg injectors "piggyback" on the standard injectors, hence the matching of flow rates

[Sunkist]

yeh but my guess is there is some sort of module that comes with the Gas that would *add injector pulse to what it would be stock.

Injector pulse will be added as a unit, and may not be a percentage in the gain. thus allowing it to run LPG.

in saying that, the stock ecu wont know what fuel/timing the emanage is adding on top of that to be able to tell the LPG module, to add another certain amount of fuel. so the LPG will always be running as stock.

If you could overide the automatic switch i think LPG is a brilliant idea - for the eManagers.

i dont know, its a thought? i hope it makes sense lol.

and Cam if your in the middle of a squirt and the fuel decides to change, or it changes without you noticing, and then give it a squirt without flicking the switch. then there'll be more problems.

[iamhe77]

yeh but my guess is there is some sort of module that comes with the Gas that would *add injector pulse to what it would be stock.

Injector pulse will be added as a unit, and may not be a percentage in the gain. thus allowing it to run LPG.

in saying that, the stock ecu wont know what fuel/timing the emanage is adding on top of that to be able to tell the LPG module, to add another certain amount of fuel. so the LPG will always be running as stock.

If you could overide the automatic switch i think LPG is a brilliant idea - for the eManagers.

i dont know, its a thought? i hope it makes sense lol.

and Cam if your in the middle of a squirt and the fuel decides to change, or it changes without you noticing, and then give it a squirt without flicking the switch. then there'll be more problems.

It only changes on startup and when the LPG is empty. I believe it is setup so only 1 type of fuel can be sent to the injectors - sorta like a "T" shaped 1-way valve.

Since the majority of LPG available from pump is anywhere from 100-103RON (Supagas have 110RON guaranteed "premium" LPG) you should be fine.

Have the guys that put 95RON in their Stageas and given them a little squirt blown up their engine's?

[Sunkist]

i dunno, ill give u a call tomorrow and explain it, i dont think i made sense..

[Sage222]

I would tend to agree.. if your running after market management.. then tune on 100RON.. then run on LPG.. same way i recommend to petrol users to tune on 95 then run on 98.. you can be sure you will be safe.. and once you do the conversion to LPG you will still make more grunt simply due to atmospheric temperatures..

and yes Vapor systems have their own form of engine management.. i woudnt go near it.. though Liquid Phase injection (my setup) requires none and the factory computer takes care of the aftermarket injectors without even knowing it.

interesting read here: (http://www.roadrunnerautogas.com/LPG.html)

Advantages over other fuels

• The combustion of Auto gas is smoother as a result of the higher octane content. Unlike other fuels, no additives are required to guarantee high quality.
• Auto gas contains no lead and is therefore cleaner and leaves no residue.
• It is actually better than petrol because it reaches the engine in pure gas form with improved combustion resulting in fewer knocking.
• With modern technology, there is hardly any discharge of carbon monoxide, and compared to petrol and diesel, the exhaust fumes contain less harmful substances.
• The life of the engine is extended as a result of the absence of acids and carbon deposits.
  
• Less carbon means less fouling of spark plugs and points i.e. less wear and tear.
• The engine oil does not become diluted with a consequential reduction in servicing costs.
• Unlike diesel, you do not have to adjust your driving style. Cold starting is no problem; engine performance is almost exactly the same as with petrol. There is no spilling when filling your tank and no possibility of theft or pilfering. Engine noise is low and you'll be driving in a more environment-friendly way.
• The environmental advantages of Auto gas for automotive use are indisputable.

[scotty nm35]

What Aaron is saying, if you want the extra timing on gas, you may have issues when the petrol automatically kicks back in as the timing will need to be dropped back at the same time. I think perhaps you could feed the Emanage a signal off the LPG solenoid to swap the map automatically, I would have to speak to Cihan to make sure though.

[Sunkist]

What Aaron is saying, if you want the extra timing on gas, you may have issues when the petrol automatically kicks back in as the timing will need to be dropped back at the same time. I think perhaps you could feed the Emanage a signal off the LPG solenoid to swap the map automatically, I would have to speak to Cihan to make sure though.

thanks. i knew someone would understand my jibberish.

[iamhe77]

thanks. i knew someone would understand my jibberish.

Haha, nah I understood what you were saying.

What I don't understand is the concern with this automatic switching.

It ONLY uses petrol on a) cold start or b) empty LPG tank.

How difficult is it to keep track of your LPG tank level? About as difficult as with the normal petrol gauge.

Why not simply have a 98 tune on your piggyback so you can pull over, flick a switch to change from the LPG tune to your petrol tune, then carry on?

I honestly don't see how this can be such a concern. What am I missing?

[scotty nm35]

I heard Aarons engine detonating on the dyno the other day and cringed, it took me back to Craig ruining his engine and how easy it was at that power.

I wouldn't want auto switching fuel if I was going to push it, better to just be happy with a 98 tune...

[iamhe77]

lol.. sounds like fear of the unknown to me.

[scotty nm35]

From me? I doubt it. lol.

You could crank a fair bit more timing into a gas tune, what if a mate was driving it when it ran out, or a mechanic took it for a thrash near empty? its only a 300km tank after all. No way, unless the engine management was setup to switch also.

[Sage222]

you could always have a dedicated petrol pump switch.. that way if you ever run out of LPG it will just fuel cut not failover to petrol.. just like a rev limiter.