DIESELGAS pricing

Jeff,
$4175 in WA. But we get an extra rebate of $1000. So maybe they just put the price up for us? Not sure
Matt

Several reasons - take your pick

The usual reasons - Free enterprise, Competition (or lack of), New technology, 2 different systems that I know of.

You have to remember that petrol-gas conversions have been done for years. Diesel-Gas conversions have only recently become popular so many mechanics are still learning how to do it.

Are the comparisons you quoted based on the same type of vehicle?

Jeff H
I recently asked for a quote from a mob in Qld and they sent me the following reply. It may answer a few of you questions. Hope it helps.

Our system is literally fuel injection for lpg. This system monitors Engine
RPM, Engine Operating Temp, Manifold Boost Pressure, Throttle Position &
from this information the LPG Processor knows whether you are Accelerating,
Cruising or even Decelerating & the LPG Injection is calibrated accordingly.
The beauty of this is the precise delivery of the lpg. You don't waste the
lpg between gear changes or at idle or even simply backing off & slowing
down. The same can't be said for our competitors systems using stepper
motors & a vacuum signal to regulate the lpg delivery. Very inconsistent as
diesels don't create a vacuum like a petrol engine, instead they actually
pulse so the mixture is very difficult to get right & keep right. Admittedly
It's actually where we started 7yrs ago & needless to say we've developed
the system a long way since then.

Our system comes with 2yrs / 50,000klm Warranty. All our conversions include
a free full tank of lpg, free dyno tuning & to top it off we also offer a
readjustment after 1500klm @ No Charge where we make sure we are still
getting the best from the system once it has bedded in ensuring the optimum
running from the vehicle.

We generally achieve savings in the vicinity of 20% to 30% & we achieve very
similar results in improvement in BHP.

$4260.00 fitted in Wodonga!!!!!! And that comes witha 30-40 litre tank. A Wb ute with tank fitted underneath cost $2450.00. I just cannot see $1800.00 for the map sensor, computer as well as a smaller tank! The labour costs would be only marginally more for a 4wd setup.

All this before the rebate

And you would have to pay ( if you wish) for warranty on top of your Vehicles one. another $160.00. You'd think that would be included!

G'day Jeff,

Mate the difference in price comes from the 2 operating principles of Diesel - LPG Conversion.
You have what they call Vapour Injection which is literally fuel injection for lpg which is what our system is. The reply that MichaelR posted is actually my reply to his inquiry. As it says, our system (vapour Injection) actually monitors throttle position, Manifold Boost Pressure, Engine RPM & Engine Operating Temp so the system knows whether you are accelerating, cruising or even decelerating so in-turn it knows how much lpg to inject & when. This means that you're not wasting the lpg @ idle or in between gear changes or as you back off when you come up behind traffic as you're running along the highway.

The other system is the simple & cheaper way but less efficient & less effective. It's how we were doing it 6yrs ago. You fit a venturi system which works on exactly the same principle as a carby conversion on a petrol vehicle. It senses the draw from the engine & relies on the engine to physically pull the lpg into the engine.
The only problem with that is the fact that a diesel doesn't have vacuum like a petrol engine does. The diesel engine actually pulses so the lpg delivery isn't very acurate. Also when you are idling, changing gears or coasting it's still putting lpg into the engine (when you don't want it to be).

If you talk to an old trucky he'll tell you about his bbq bottle in the passenger seat with his garden hose running up to the air intake. When they see a hill coming up or they want to pass another truck they'd lean accross, crack the tap open & hang on, then shut it off at the top & wait for the next hill.

There's more than 1 way to skin a cat but if you're looking for something that'll be reliable & effective then you need to do it right.

Consider the fact that you might save yourself money by shopping around & compromising on what you fit but the 1st time it gives you trouble you're going to be up for repairs, doing your savings & then you're stuck with it.

Kind Regards
Dallas Green