Auto-LPG Conversion Thread

[ryanboy]

Before conversion i consume on the average 6km/l on unleaded. At NAIDS i went for the efi emulator venturi type, cost me 24,500 pesos end of July this year. I never had the time to go back for check up at Naidds, but will try pass there by Dec for maintenance check.

Before i decided to convert i was already reading this thread on problems encountered by cars on sgi, so this made it easier for me to go for the cheaper conversion. I was also monitoring GH with his Corolla done at NAIDS and so far LPG is ok.

[dencio1976]

it's been awhile since last i posted on this section.


anyway, nabasa ko yung problem about SGI?

yung isang sentra GX 07 namin equipped with SGI nagkaron din ng problems.

1st encounter i had with it was clogged fuel filter inside the fuel tank. you will have problems running your car on gasoline. even worse, it won't start at all since it starts on gasoline and only runs on LPG after it reaches a certain engine temp.

problem is the fuel pump keeps pumping gas kahit hindi naman need ng engine mo as you run your car on LPG. nagkakaron ng build up ng dumi sa fuel tank that way. probably a breakdown(by stirring). nakakapalya din.

solution? i installed a manual switch on the fuel pump. problem solved.



problem with this is since it's manually overriden, minsan makakalimutan. either ayaw magstart kasi nakalimutan on yung switch or hindi naipatay nung nagswitch to LPG na yung engine.



my thoughts:

since may fuel management na ang SGI, dapat nakaincorporate na sa computer box yung fuel pump cutoff which i thought they already did.




pero the best pa rin ang SGI kit conversion para sakin. hindi makulit sa tono generally.

[ghosthunter]

yung isang sentra GX 07 namin equipped with SGI nagkaron din ng problems.

1st encounter i had with it was clogged fuel filter inside the fuel tank. you will have problems running your car on gasoline. even worse, it won't start at all since it starts on gasoline and only runs on LPG after it reaches a certain engine temp.

problem is the fuel pump keeps pumping gas kahit hindi naman need ng engine mo as you run your car on LPG. nagkakaron ng build up ng dumi sa fuel tank that way. probably a breakdown(by stirring). nakakapalya din.

solution? i installed a manual switch on the fuel pump. problem solved.



problem with this is since it's manually overriden, minsan makakalimutan. either ayaw magstart kasi nakalimutan on yung switch or hindi naipatay nung nagswitch to LPG na yung engine.

my thoughts:

since may fuel management na ang SGI, dapat nakaincorporate na sa computer box yung fuel pump cutoff which i thought they already did.

pero the best pa rin ang SGI kit conversion para sakin. hindi makulit sa tono generally.

In my system, the fuel pump is automatically cut off when I switch to LPG.

In our other cars (greenfuel SGI systems), a relay was installed to automatically cut off the fuel pump when the Auto-LPG is engaged.

[aamd]

Fuel Consumption as of 09 August 2009

Car:.................2004 Mitsubishi Outlander 2.4.........1998 RAV4 2.0
LPG Kit:............SGI Greenfuel..............................CATGAS Open loop
Date (2008):.....June 23 - March 09.....................May 19 - August 08
Km/Liter:..........5.79.............................. .............5.62
Peso/Km:..........4.41................................. ..........4.53
% Loss:............27%.............................. .............20%
Peso Savings:.....P39,384.88........................... . .......P36,082.67
% Savings :.......27.50%.................................... ..34.10%

Fuel Consumption as of 3 December 2009

Car:.................2004 Mitsubishi Outlander 2.4.........1998 RAV4 2.0
LPG Kit:............SGI Greenfuel..............................CATGAS Open loop
Date (2008):.....June 23, 2008 - Nov 15....................May 19, 2008 - Aug 22
Km/Liter:..........5.76.............................. .............5.62
Peso/Km:..........4.39................................. . ..........4.51
% Loss:............27%.............................. .............19%
Peso Savings:.....P43,109.41........................... . .......P37,272.35
% Savings :.......27.30%.................................... ..34%

Sadly, i sold my RAV4. i just got a company issued car to replace it. If only i have an extra parking slot i would have maintained RAV4.

RAV4 - I earned 16,272.35 pesos

ROI for Outlander is 39k - Nakakasave na ako ng 4,109.41 pesos

I seldomly use the Outlander. That is why my LPG savings decreased.

Thank you CATGAS...
Thank you Greenfuel...

More LPG....More peso to your pockets...

[n5110]

So far the only periodic maintenance needed was periodic draining of the vaporizer of the water that collects inside.

How do you exactly drain the vaporizer? few month ago i had my car service at GF because of no idling, pagkabukas may liquid (oil) substance inside contaminants ata, hinde naman ako naturuan ng tamang pag bleed nito. may nakausap kasi akong suking taxi driver na dapat daw luwagan yung bleed screw then i switch ON ang ignition. naguluhan tuloy ako.

[ghosthunter]

How do you exactly drain the vaporizer?

Just remove or loosen the drain plug under the vaporizer and wait for the accumulated liquids to finish dripping out of it. Replace the drain plug.

With most installations, the vaporizer would be more accessible. But in my case, it's installed between the engine and firewall, so access is limited. To make my life easier, I just bring it to NAIADSS (the installer for my kit) and have their guys drain it for me.

[Mile2]

How do you exactly drain the vaporizer? few month ago i had my car service at GF because of no idling, pagkabukas may liquid (oil) substance inside contaminants ata, hinde naman ako naturuan ng tamang pag bleed nito. may nakausap kasi akong suking taxi driver na dapat daw luwagan yung bleed screw then i switch ON ang ignition. naguluhan tuloy ako.

Maganda niyan paturo ka sa GF technicians, pero sa nakita ko ang ginawa nila ay disconnect the vaporizer hose going to the nozzle rail then activate the solenoid check valve by supplying +12V.

or disconnect the hose going to the nozzle rail and then switch the ignition on and then switch to LPG mode.

[Mile2]

Bad trip nagka oily lpg contamintion na naman ako when I switch to other LPG refilling station, nagkaroon ng hesitation ang takbo at ng tinignan ko ang spark plug ko maitim.

[speed unlimited]

Kadalasan naman na nakausap ko na nagpa convert ng LPG kadalasan problema nila ay tagas ng langis sa valve cover gasket at mga oil seal dahil pag LPG raw ay masyadong mainit ang makina.

[ehnriko]

LPG is indeed a hot set-up, this is the reason why you need some sort of protective oil that goes with your fuel feed... otherwise, the spark plugs will foul faster and engine wear will also be accelerated. If you want to do an LPG conversion, you need to go to those who have shops with good reputation.

Another thing is, when you go lean burn, it's like using LPG... both ways will heat up your engine temperature. This is why it is not recommended to run with a lean setting.

Unless you have supplementary fuel that will aid the combustion speed from the flame front near the power stroke of the piston. Increasing the flame speed will keep the hot gas or combustion out of the cylinders before the valves closes totally. The reason why it builds up heat is because the fuel mixture is too dry, the standard 14:1 mixture of Air and fuel is just enough to do some cooling effect to the chambers.

The gaskets are good for at least 200 deg. Centigrate or more... but if heat is building up from the cylinders... the engine temp will rise to above 95 deg. most of the time... causing gaskets or seals to deform or crack. Silicon gaskets may withstand about 200 deg. C. neoprene - maybe a bit more. Engine temps.. near the exhaust side can go much higher.

If you keep the mixture at standard setting with normal fuel, you can keep the temp lower.