Lpg Conversion Replacement

[JAS21]

Guys..we fitted an injector system to my wifes car,a Mazda Lantis,some five years and 100,000Kms ago, actually the guy at the Mazda Dealer through his hands up in dispair when he saw the conversion!...said Lantis engine not designed for gas. Step-daughter has had the car during most of this time hence the mileage even though she spent two years in the UK!

Anyway one part has cracked and cannot be replaced. The shop, on the phone to my wife tonight, are offering a System made in Poland by AC, so I guess that is a STAG unit. Has anyone had any STAG model fitted? He has come up with quite a reasonable price to convert and I know that he knows what he is doing as it as he tied the original unit into the ECU quite cleverly.

Now, he doesn't seem to fit an oiler, any views on this please. The engine has now done some 215,000kms so it won't be all that long before it needs another unit dropping in anyway.

[WarpSpeed]

215,000 on a car not supposed to have LP guess that blows those naysayers out of the water! Sorry I have no advice for you but it would be nice to see the part that is supposedly irreplaceable. Any chance for a picture? Pretty funny your car is out-lasting your Lp system ...

Oiler is not necessarily needed though, just switch back and forth between benzine and Lp some time before shutting down and leave it until reaching warm up temp of at minimum 65c and run the benzine for periods when ever running for any trips of length to cool and lubricate the valves..

People claim that LP is much dryer and that may be true but the vaporizer on my car has a pretty significant oily residue that requires a bleed off valve to empty on occasion as does my entire intake system all due to the LP so it isn't THAT dry...

[MikeyIdea]

If the engine wasn't made to take LP conversion in the first place and it still has had to take the punishment of having one for 100,000 km, then repair of the engine or replacement of the LP unit seems to me a short term solution...

[katabeachbum]

215,000 on a car not supposed to have LP guess that blows those naysayers out of the water! Sorry I have no advice for you but it would be nice to see the part that is supposedly irreplaceable. Any chance for a picture? Pretty funny your car is out-lasting your Lp system ...

Oiler is not necessarily needed though, just switch back and forth between benzine and Lp some time before shutting down and leave it until reaching warm up temp of at minimum 65c and run the benzine for periods when ever running for any trips of length to cool and lubricate the valves..

People claim that LP is much dryer and that may be true but the vaporizer on my car has a pretty significant oily residue that requires a bleed off valve to empty on occasion as does my entire intake system all due to the LP so it isn't THAT dry...

Vento 2,0? whats your milage? Properly adjusted its not supposed to be any LPG sentiments left. If there is, probably running LPG to rich, poor milage.

Oiler should not be needed, and is illegal due to pollution requirements

Mazda Lantis, if its a 2,0 V6 it runs well on LPG. But 20k km/year, is it really worth investing in a new system? Engine survival on petrol only is longer

[WarpSpeed]

215,000 on a car not supposed to have LP guess that blows those naysayers out of the water! Sorry I have no advice for you but it would be nice to see the part that is supposedly irreplaceable. Any chance for a picture? Pretty funny your car is out-lasting your Lp system ...

Oiler is not necessarily needed though, just switch back and forth between benzine and Lp some time before shutting down and leave it until reaching warm up temp of at minimum 65c and run the benzine for periods when ever running for any trips of length to cool and lubricate the valves..

People claim that LP is much dryer and that may be true but the vaporizer on my car has a pretty significant oily residue that requires a bleed off valve to empty on occasion as does my entire intake system all due to the LP so it isn't THAT dry...

Vento 2,0? whats your milage? Properly adjusted its not supposed to be any LPG sentiments left. If there is, probably running LPG to rich, poor milage.

Oiler should not be needed, and is illegal due to pollution requirements

Mazda Lantis, if its a 2,0 V6 it runs well on LPG. But 20k km/year, is it really worth investing in a new system? Engine survival on petrol only is longer

I don't have a Vento 2.0, not at this point anyway, maybe in the future though not likely I don't want to get into that much conversion required to marry it with a 20V head and I want the 20V VVti engine, I'm considering putting in a 1.8 20V, currently mine is the standard 1.8 8V and my mileage varies obviously. I'm not known for being light footed but it's far cheaper then benzine that's for certain... The LP deposits I'm referring to are in the system prior to the intake and there is a sediment release valve on the bottom of the vaporizer to remove said deposits.. Maybe it is rich though, I've been fine tuning it since I got it but honestly if that's the case I like the current performance and likely will forgo the mileage loss in exchange for the performance and besides too lean will cause more potential valve damage when that's already a concern where Lp is involved.. If it ain't broke, don't fix it, as they say...

Now that you brought it up though I may play with it a bit da_n it!! ...................On second thought no I won't!!........................................ Well maybe a little bit................... No! Leave it alone!! .......................... ..................................Ok............ Pardon me, just a little bit of internal conflict on that one that needed to be sorted......

[aussiebebe]

My view is that you'd be better investing in a new car like a Nissan March, Proton Savvy or cheaper Cherry QQ which all do 20km/litre, instead of a new LPG system and then (weirdly) a new engine. As people only use LPG to save money, the system won't pay for itself before you need a new engine and have to pay to reinstall the LPG system on the new engine - why would you do that?

Financially, why not remove the old system and run the car on benzine until it gives up the ghost?

[WarpSpeed]

My view is that you'd be better investing in a new car like a Nissan March, Proton Savvy or cheaper Cherry QQ which all do 20km/litre, instead of a new LPG system and then (weirdly) a new engine. As people only use LPG to save money, the system won't pay for itself before you need a new engine and have to pay to reinstall the LPG system on the new engine - why would you do that?

Financially, why not remove the old system and run the car on benzine until it gives up the ghost?

This has already been proven to be bunk...

[MikeyIdea]

My view is that you'd be better investing in a new car like a Nissan March, Proton Savvy or cheaper Cherry QQ which all do 20km/litre, instead of a new LPG system and then (weirdly) a new engine. As people only use LPG to save money, the system won't pay for itself before you need a new engine and have to pay to reinstall the LPG system on the new engine - why would you do that?

Financially, why not remove the old system and run the car on benzine until it gives up the ghost?

This has already been proven to be bunk...

Please do enlighten us as to why warpy

[WarpSpeed]

Nope, there's more then enough threads on here already just search one of them..

[MikeyIdea]

Nope, there's more then enough threads on here already just search one of them..

Tried and Nope, couldn't find one applicable

Perhaps you can lead me to one that discusses LPG installed on an engine that a manufacturers representative claim doesn't support running on LPG

[JAS21]

My view is that you'd be better investing in a new car like a Nissan March, Proton Savvy or cheaper Cherry QQ which all do 20km/litre, instead of a new LPG system and then (weirdly) a new engine. As people only use LPG to save money, the system won't pay for itself before you need a new engine and have to pay to reinstall the LPG system on the new engine - why would you do that?

Financially, why not remove the old system and run the car on benzine until it gives up the ghost?

OK, thanks for the interest guys… You can see my view on most of the points raised below.

Warpee..I have the bit, it’s cracked, I’ll e-mail you a photo in a day or so, the part just isn’t available any more and too risky to try and glue even with an epoxy.

It was 100,000 Kms in three years actually..she was in the UK for the other two…her MSc cost me a bomb though!

Now the costs…lets say Gas at 13.2 Baht/Ltr that allows for the 10% different in CV to gasoline. (it’s close on 12baht/Ltr now)

Now lets say gasoline at 31Baht/Ltr.

The Lantis 1.8Ltr is a pig especially on a worn engine and about7Kms/Ltr around BK

That gives for 100,000Kms 14285 Ltrs of fuel so on gas all the time cost would be 188571Baht and on Petrol all the time 442857Baht. It’s about right as 2Baht/Km on Gas is average now.

So the saving on gas in 100,000Kms is about 254,285Baht.

The original installation was a little over 30000Baht..so the saving is over 200000baht. Bear in mind it is a 1995 car. My wife had it from new.

Now he has just charged me 16000Baht to fit the STAG 300…don’t forget that we already had the tank /pipework etc. Now she is averaging 300Kms/week (at least!!). On gas that is, at 7Kms.ltr 42.85Ltrs (adding in the 10% lower CV) costing 565Baht. Now if she runs on gasoline 7Kms/Ltr and 31baht/Ltr the cost is 1328Baht. A saving of 763 baht…so the BREAKEVEN POINT is about 21weeks. …Surprising yes.

Even if the engine does not last another 21 weeks..6000Kms ish..we still have the system and it’s only about one days work to fit to another engine.

Sorry whoever..I’m not buying her a new car..she can work/save/wave her MSc at it whatever. With what little money I have left I’m replacing my three year old 520d with the new 3Ltr 6Cyl one due out here at the end of the year and going to enjoy my time left above ground with my ‘aging asian babe’ of a wife.

[WarpSpeed]

John not seeing it I can't say definitively but I was more thinking manufacturing/fabricating a new one, but as I said I have no idea which part it is so maybe not practical..

It seems you've already dropped the cash anyway, how is the power with the new injection system? has it improved? I'm planning to change mine over soon too as it's certain that the system I have now is not efficient and starving performance. I'm also going to put it in place to be able to convert if/when I put in a 20V to which will definitely need that system..

What about putting in a newish rotary in her Lantis? I want to do that in the worst way, put one in one of these aero package FWD cars because in my mind it is a perfect marriage for a real momentum engine such as a rotary... Low down and compact weight distribution...

[aussiebebe]

I was wrong to suggest a new car, I misread the post I thought you were installing a complete new system, plus it seemed the annual mileage was lower than 20k and I assumed the Mazda had better economy with benzine than 7km/l which is suprisingly low. The break-even point is much sooner than I thought, so very sensible, STAG is a well-regarded brand - but it seems you already decided already!

[MikeyIdea]

her MSc cost me a bomb though!

Well invested money

Congratulations to your daughter and Proud Daddy

[JAS21]

John not seeing it I can't say definitively but I was more thinking manufacturing/fabricating a new one, but as I said I have no idea which part it is so maybe not practical..

It seems you've already dropped the cash anyway, how is the power with the new injection system? has it improved? I'm planning to change mine over soon too as it's certain that the system I have now is not efficient and starving performance. I'm also going to put it in place to be able to convert if/when I put in a 20V to which will definitely need that system..

What about putting in a newish rotary in her Lantis? I want to do that in the worst way, put one in one of these aero package FWD cars because in my mind it is a perfect marriage for a real momentum engine such as a rotary... Low down and compact weight distribution...

OK Warpee... three pictures. The gas was leaking out of the hole where the cable goes in and the other hole. My view is that it's not conclusive that the cracks were the problem, could have been the 'O rings", anyway either way no spares available as that system out of production. Don't know about the performance as I haven't driven it yet, but wife and daughter say it's OK.

Looking at pictures from the AC Gas-Sync software (STAG 300) performance looks the same on gas and gasoline.

Mikey.....Actually she is my 'inherited' daughter, and is now twenty seven...the MSc was a first, clever girl...anyone want to marry her

[MikeyIdea]

Mikey.....Actually she is my 'inherited' daughter, and is now twenty seven...the MSc was a first, clever girl...anyone want to marry her

Enough with marriages for Mikey My last love is my daughter, she's 6 next month so I hope she will decide to wait for another 10 years before allowing someone to touch her. Hopefully... I have a feeling she will decide that herself and not listen too much to what old Daddy says

[WarpSpeed]

John not seeing it I can't say definitively but I was more thinking manufacturing/fabricating a new one, but as I said I have no idea which part it is so maybe not practical..

It seems you've already dropped the cash anyway, how is the power with the new injection system? has it improved? I'm planning to change mine over soon too as it's certain that the system I have now is not efficient and starving performance. I'm also going to put it in place to be able to convert if/when I put in a 20V to which will definitely need that system..

What about putting in a newish rotary in her Lantis? I want to do that in the worst way, put one in one of these aero package FWD cars because in my mind it is a perfect marriage for a real momentum engine such as a rotary... Low down and compact weight distribution...

OK Warpee... three pictures. The gas was leaking out of the hole where the cable goes in and the other hole. My view is that it's not conclusive that the cracks were the problem, could have been the 'O rings", anyway either way no spares available as that system out of production. Don't know about the performance as I haven't driven it yet, but wife and daughter say it's OK.

Looking at pictures from the AC Gas-Sync software (STAG 300) performance looks the same on gas and gasoline.

Mikey.....Actually she is my 'inherited' daughter, and is now twenty seven...the MSc was a first, clever girl...anyone want to marry her

Ok John not something to be trifled with, better off replaced being as critical as it is with gas and that part looking well worn. How did you notice it was a problem? Did you smell gas leaking?? Scary stuff!!