gas conversion...is it really worth it?

[pongo]

i have a 22r in my 4runner on lpg. In my opinion your mad if you dont use lpg. i have a fuel injection manifold i plan to put on and run straight gas through it. Thatll give me more power than the old carby setup ever did. as for power loss. you have to have power b4 you can loose it. ( just another benifit of a 22R ).

Cheers

[big bundy]

you have to have power b4 you can loose it. ( just another benifit of a 22R ).

Cheers

BAHAHAHAHA soo true, and the facts are i am sold on lpg thanks to u guys, i'll ring around wreckers and that tommorrow, i need a 75L tank? mixer for a 4cylinder car? and then all the lines have to be installed provessionally?

when it comes to the mixer......is it just ontop of the carby? or on the intake pipe?


thanks greg

[Loanrangie]

Depeneds on the system, but most likely it wil be a gas ring that fits between the carb and manifold. You can fit all the lines yourself just ask an installer what the regs say about where and how, go for a flexible line ran along the chassis rail .

[chimpboy]

Depeneds on the system, but most likely it wil be a gas ring that fits between the carb and manifold. You can fit all the lines yourself just ask an installer what the regs say about where and how, go for a flexible line ran along the chassis rail .

Knowing nothing about gas systems, I take it then that the basic way this works is that the gas ring lets gas flow into the incoming air and mix with it, then the gas/air mix gets sucked into the cylinder before injection...

So air flow is controlled by the carby just as it would be for petrol? How exactly is the flow of gas controlled? I mean I know there's a mixer, but what does it "read" to decide how much gas to allow in? Vacuum?

I realise these are total n00b questions but I figure it's probably worth having a basic grasp of how a gas system works now that I have a dual fuel vehicle.

One of the things I've been wondering is, how vehicle-specific is a gas setup? ie given that a TB42 is a 4 litre-ish motor, does that mean the lpg gear from, say, a 3.9 litre falcon could be adaptable, provided they are both carburetted? Because that stuff is easy to get used.

Jason

[V8Patrol]

Pic of the duel tank setup I've just installed in my commodore....

The black tube ( horse collar tube .... [ well reallys its called horse franger tube ] ) runs from the filler on the left hand rear 1/4 panel into the front tank....
The filler line continues on with tha supply line to the second tank, after wich the 2 supply lines head on out via the boot floorpan where they join into a single line and then go to the engine bay.

[Loanrangie]

Knowing nothing about gas systems, I take it then that the basic way this works is that the gas ring lets gas flow into the incoming air and mix with it, then the gas/air mix gets sucked into the cylinder before injection...

So air flow is controlled by the carby just as it would be for petrol? How exactly is the flow of gas controlled? I mean I know there's a mixer, but what does it "read" to decide how much gas to allow in? Vacuum?

I realise these are total n00b questions but I figure it's probably worth having a basic grasp of how a gas system works now that I have a dual fuel vehicle.

One of the things I've been wondering is, how vehicle-specific is a gas setup? ie given that a TB42 is a 4 litre-ish motor, does that mean the lpg gear from, say, a 3.9 litre falcon could be adaptable, provided they are both carburetted? Because that stuff is easy to get used.

Jason[/quote]

Yeah, your carb just adjust's air flow, i actually made an error in my desciption, mixer needs to be upstream of the butterfly/ throttle body.
Most syetms to work upto a certain capacity so yes a falcon 3.9 setup should work on a GQ 6, i used a converter off a 4.1 ltr fairlane for my Rangie. The converter can be fine tuned by changing springs inside to adjust the sensitivity to vacumn as this determins gas flow. The simplest setup is an impco 300a mixer and model L converter, this will run almsot anything but the largest V8. I paid about $50 for the parts - converter and mixers from pick a part. And on the way out i FOUND 2 sets that would suit an efi large 6 or 8 !

Nick.

[big bundy]

thanks guys, v8patrol, could you please be able to take a pic of your engine bay, where your gas mixer is? and also would someone please be able to take basic measurements of their tank? so i can see if i would be able to fit one under the cruiser, or howmuch room it will take up internally.

greg

[big bundy]

LPG KIT WITH stainless steel tank, suit small car, $220 (03)98507831, (0409)943754, Doncaster

the guy said it was for a nissan pulsar, being a 4 cylinder, will it fit the 22R also or will the difference in displacement mean that it will not be able to throw enough gas in?

[Loanrangie]

LPG KIT WITH stainless steel tank, suit small car, $220 (03)98507831, (0409)943754, Doncaster

the guy said it was for a nissan pulsar, being a 4 cylinder, will it fit the 22R also or will the difference in displacement mean that it will not be able to throw enough gas in?

If the capacity is similar then it would work, ask what brand and model the converter is and ask an lpg installer like the place on bridge rd Eltham or George crt Greensy - near where Para rd starts.