Thread: liquid injection

in the case of well done installations and tunes

• expensive to install compared to fumigation
• a little harder to do self service and tune work on
• Is usually slightly more economical than fumigation for a given power level
• can get you more power from the LPG (but at the cost of increased consumption if you use it)
• so far it seems to be more reliable than the Fumigation stuff.
• I've heard mixed opinions of the results on the overall economy of it.

I've never installed one (Im not a gas installer), Ive tweaked a few(only 2 on landies) to get it to where the owners thought it should be (and in fairness the shortcomings on the landies were more LR "quirks" than LPG system shortcomings) after a not optimal installation and my personal opinion of it is

"if it was installed from factory as a cheap or free option I'd take it but I remain unconvinced that with the current and predicted costs of LPG it is a cost effective modification"

The potential for poor installation is much, much greater than with vapour injection. The placement of the injectors is critical, as they spray liquid, not vapour. The LPG tank must be of the correct design (pump-in-tank) and AFAIK they haven't worked out how to run twin tanks as commonly used under D2's.

Using vapour injection is much more forgiving, you can increase performance by programming a percentage of petrol under load. Also you can reuse second hand lpg tanks, even off a D1. Cost effective for what is now an 11+ year old second hand vehicle. Also liquid lpg tanks like petrol tanks on efi can't be run empty, wasting range.

The best liquid injection kits are by Orbital Autogas, rigorously tested by proper engineers and sold as vehicle-specific kits. Unlikely to be available for a tiny volume vehicle like the D2. For a bit more info, look at Liquid LPG injection | Supplied by Orbital Autogas

Thanks Gents, that's provided the clarity I was looking for!

Bee utey,

Is the factory Tojo Landi Renso vapour or liquid injection?

It seems common on Taxis here,and we have it on our work vans.

Originally Posted by scarry

Bee utey,

Is the factory Tojo Landi Renso vapour or liquid injection?

It seems common on Taxis here,and we have it on our work vans.

Almost certainly vapour injection. Liquid injection is relatively uncommon. Vapour injection is obvious in that it uses a water heated vapouriser (converter) and remotely mounted injectors with low pressure hoses to the manifold. Injector rail pressure is typically only 20psi. Liquid injection runs high pressures from the in-tank pump and lacks a converter.

Another source of liquid injection systems:

Australian LPG Warehouse - Systems