You'd be wise to use a
reputable conversion company, ensuring that the job
is done safely and properly. You must inform your
insurer of the conversion, preferably checking that
they are happy before you proceed. Note that most
major insurance companies do not 'load' (increase) a
premium as long as the conversion is carried out by
qualified personnel and properly certified.
When choosing to get your vehicle
converted at Belmore LPG Conversions, you
will get a
warranty on both parts and labour and a
conversion certificate for your insurer. Keep the
latter safe and only fax or post a copy to
It is absolutely crucial that the correct
type of conversion is fitted to your car.
Inappropriate conversions can cause unreliability,
damage to the engine or
catalytic converter or simply be a plain waste
of money if too complicated for the application.
The mileage your car has covered
before conversion presents no barrier if it is high. All that we require
is that the engine runs well on all cylinders and
that it has a very good ignition system. We examine
every car before conversion is commenced and will
advise you if any faults exist, and suggest ways of
What effect does LPG have on
economy and power?
Because LPG does not contain the same amount of
energy as petrol, both fuel consumption and power
will suffer. However, later model vehicles are
generally less affected.
Up to 30% increase in fuel consumption may
be expected but this is offset by the lower cost per litre
What does an LPG conversion involve?
The conversion itself does not alter the car much: new
equipment is added but very little of the existing equipment
is changed or removed. All conversions will, however,
include a dedicated gas fill point.
During most conversions:
A steel LPG storage tank is installed,
usually in the boot but it can go under the floor in
vehicles with enough clearance (e.g.; four wheel
drives). This tank must be fitted with an automatic fill
limiter (AFL) which ensures you cannot fill your tank
past the safe fill limit of 80%. This is necessary as
LPG requires room to expand with temperature changes.
A converter/regulator is added. This
converts the liquid gas into a gaseous vapour, as well
as regulating the process.
A special air/fuel mixer is installed
to ensure the correct amounts of LPG and air are mixed
together during combustion.
A fuel lock is fitted that lets fuel
flow when the engine is running but shuts off the fuel
supply as soon as the ignition is turned off.
If the vehicle is post-1986 (i.e. built
to run on unleaded petrol), it must be fitted with an
LPG Fuel Control Processor.
What does dual-fuel mean?
Dual-fuel means the vehicle can operate on either one of
two fuels, usually petrol or LPG.
Should I choose LPG only or dual-fuel?
It costs no more to have your car converted to dual-fuel
than it does have it converted to LPG only. So if it’s
possible, it makes sense to go dual-fuel and give yourself
the added flexibility of being able to use two types of
Post – 1986 vehicles (i.e. those built to run on unleaded
petrol) present no problems. With these vehicles, the engine
tuning is the same whether it’s running on LPG or unleaded
Do engines with E.F.I systems operate
efficiently on LPG?
Yes, but only provided the equipment to be used is
selected carefully. Ensure that it is designed, intended and
can be tuned for the particular vehicle. Most, but certainly
not all EFI systems, can be converted effectively to either
“Dual-Fuel” or “Gas Only”. There are many technical factors
which should influence the final decision on type of
Is much of the vehicle manufacturer’s
No, especially not where the conversion is to
“Dual-Fuel”. With the new breed of engine management systems
the vehicle emission controls, sensors, catalytic converter
and computer modules must continue to function correctly.
The new gas control system may need to be interfaced with
the existing engine control electronics.
Vehicles must continue to comply with
relevant Australian Design Rules and installation must meet
Some makers, like Ford, Holden, Toyota and
Mitsubishi offer factory fitted or approved LPG systems.
How is LPG normally stored in cars?
An LPG container is manufactured to comply with AS 3509
and installed to meet the stringent safety requirements of
AS 1425. It is normally installed in the forward area of the
vehicle’s boot. The installer should fully discuss the type
and size of container that best suits your vehicle when
presenting the quotation.