Auto-LPG Conversion Thread

[bigMIKE]

Thanks for the inputs, ghosthunter.

Learned that Ekogas is using Matrix injector while other installers apparently use Valtek. And their system has its own O2 sensor. From some web sources it appears that Matrix is superior to Valtek. True?

Another thing-- where do installers source their tanks? I heard some use locally-manufactured tanks. Are these inferior to imported tanks?

Salamat.

We used to carry Matrix injectors as they are supposed to be more superior but based n our experience Valtek is more forgiving as our lpg is not as clean as the european lpg and Matrix injectors jam easily. And there is no way one can repair a Matrix injector. This has to be replaced not compared to Valtek.

[ghosthunter]

hi sir GH. ako ung nagpaconvert ng type z honda city. i just had my EROOM kit retuned kahapon. ano pa kaya kelangan kong gawin. their mechanic said, ung simota air filter ko raw ung culprit. mas malakas daw higop ng hangin so kelangan magcompensate ung feed ng LPG para raw stable? could this assumption be true? parang wala tuloy akong tiwala sa mechanic nila. i badly need your advice. would changing my spark plugs help?

From two of our cars having idle problems, changing the spark plugs was the solution. (It seems the Mazda3 runs better on colder spark plugs for some reason).

As for the air-filter, I don't think so. They can tune the lpg system to run well without the filter so why it should matter if it's a stock or aftermarket filter? Although the cone filter would let the engine suck in air easier, the volume of air is still the same.

Years ago, I got the same BS from NAIADSS about my cone filter. A few months ago, I dropped by NAIADSS to get them to re-tune my LPG system. They adjusted the two screws and done. No BS about the simota cone filter I use.

Just remember, cone filters can get clogged enough with dirt to affect your venturi-mixer LPG system in as little as 2000km of use. Compressed air (from the inside) should help clean out some of the dirt.

[ghosthunter]

Another thing-- where do installers source their tanks? I heard some use locally-manufactured tanks. Are these inferior to imported tanks?

Donut tanks are imported. I think it's because we don't have the manufacturing capability for this shape.

The cylinder tanks are most (if not all) locally manufactured. I don't think the local tanks are inferior as long as they follow the Philippine PS quality/safety certification standards.

[kapitan88]

I think there is truth to this, kasi yung setup ko, sabi ng technician na may abang na daw for lpg yung carb ko, so instead of placing another device to control air/fuel, nag install na lang ng lpg line directly sa carb ko, as they said na wala silang fit on my carb nung pang control na yun, so to compensate dahil walang control, what they did was to put in a piece of galvanize sheet metal with 4 small holes to block/restrict air passage, nilagay yun dun mismo sa top ng carb just before yung assembly ng air filter, so the problem now is pag i switch back to petrol, ang takbo nya ay choke, at di ako maka rev to 3K rpm, I was told na lalakas nga ang consumption ko if di ilagay yung restrictor na yun. parang ngayon narealize ko na, dahil they've tuned mine ng di nalinis yung air filter, so after travelling about 80Kms, the following day nilinis ko yung air filter, napansin ko lang after about 30Kms pa lang nagbawas agad yung fuel indicator ko ng another light, and then may parang amoy maasim yung exhaust ko, so kinalikot ko yung mixer, turned clockwise, pabawas ng fuel, nawala na yung amoy nung asim usok. also i've traveled 20Km ulit, di pa gumalaw ulit yung indicator ng fuel. I'll post bukas pag pasok and mag refill kung ilan ang natakbo ko sa unang fill up. dati sa gas i'm doing 9-11 Km/L (sakal pa ang tuning nun), if medyo accurate naman yung gauges ng lpg, i would guess na im running at 7-8Km/L. Tomorrow malalaman ko na actual pag ka karga ko. if maging mababa ang turn out, i will try to fabricate yung restrictor with smaller holes, kung mas makakatipid.

add:
just researched now, yung venturi mixer pala ang di na nailagay, straight na yung lpg sa carb ko. so everytime na takbo ako ng petrol, i would have to dismantle the air-filter assembly to take out yung restrictor (sheet metal), otherwise, laging choke ang takbo sa petrol.

anyone here converted a lancer 4g15a engine to lpg? ganito din kaya setup nila.

hi sir GH. ako ung nagpaconvert ng type z honda city. i just had my EROOM kit retuned kahapon. ano pa kaya kelangan kong gawin. their mechanic said, ung simota air filter ko raw ung culprit. mas malakas daw higop ng hangin so kelangan magcompensate ung feed ng LPG para raw stable? could this assumption be true? parang wala tuloy akong tiwala sa mechanic nila. i badly need your advice. would changing my spark plugs help?

[Myco]

Mined is toyota crown deluxe 2.2 engine 4 cylinder.....1989 model....can they convert it to LPG...

[kapitan88]

ito yung carb ko na normal ang air intake:
the technician noted na may abang na daw talaga for lpg inlet yung carb ko.



ito naman yung nilagay para sa lpg conversion ko, para matipid.



tomorrow i will find out kung maganda ang fuel consumption ko after i refill. so far, am very happy with my conversion, i noticed na mas smooth ang takbo ng engine ngayon on lower revs.

[leatherman]

We used to carry Matrix injectors as they are supposed to be more superior but based n our experience Valtek is more forgiving as our lpg is not as clean as the european lpg and Matrix injectors jam easily. And there is no way one can repair a Matrix injector. This has to be replaced not compared to Valtek.

Ok, so I guess it's a matter of trade off then--performance vs. risks. But maybe installer warranty and good maintenance program might offset the potential drawbacks of Matrix? Thanks, bigMIKE.

The cylinder tanks are most (if not all) locally manufactured. I don't think the local tanks are inferior as long as they follow the Philippine PS quality/safety certification standards.

Agree. Thanks always, ghosthunter.

[chuaed]

Mined is toyota crown deluxe 2.2 engine 4 cylinder.....1989 model....can they convert it to LPG...

Its better to have your car checked by a reputable AutoLPG installer, or mechanic because as far as i know older vehicle engine is made from cast iron cylinder heads without andy additional hardening of the valve seat material, thus will show signs of premature valve seat wear when operated on LPG Autogas, typically this is present in exhaust valves pounding into the cylinder head due to erosion of the valve seat.

Explanation:

LPG Autogas is referred to as a dry fuel because there is no cooling effect on internal engine components due to vaporization of the incomming fuel where only intake air is drawn in but there is no lubricating effect of the particulates from the combustion of the fuel providing librication of the exhaust valve seat.

[ghosthunter]

add:
just researched now, yung venturi mixer pala ang di na nailagay, straight na yung lpg sa carb ko. so everytime na takbo ako ng petrol, i would have to dismantle the air-filter assembly to take out yung restrictor (sheet metal), otherwise, laging choke ang takbo sa petrol.

anyone here converted a lancer 4g15a engine to lpg? ganito din kaya setup nila.

I suggest you simply go back to the installer and insist they install the venturi-mixer portion. This should solve most of your problems.

[ghosthunter]

Mined is toyota crown deluxe 2.2 engine 4 cylinder.....1989 model....can they convert it to LPG...

You have to check if your engine is compatible to unleaded gasoline. If yes, it will probably use a LPG venturi mixer system when converted.