I'm considering converting Trooper 98 (3.5L V6 petrol engine) to run on
liquified propane gas (natural gas or whatever it's called). Any
feedback/experience on this - good or bad? I reckon it should pay for itself
I think the sole reason to use LPG in your car in this country is the
fuel cost, isn't it? Let me talk a little about LPG usage in Korea
here. I'm from Korea and there are tons of LPG vehicle in Korea because
of the high gas price. However, LPG vehicles are only allowed for
commercial purpose or handicapped people because of the mechanical
difficulties and also of government's concern about the reduced tax
collection :). Here's what I heard from magazines and newspapers....
1.Usually, LPG engines are less powerful that gas vehicle. This is
mainly because the engine and trans are not properly tuned for LPG
property. Most of the LPG engines are just an fuel injecting device
attatched version of gas engine in Korea. I think the situation is
similar in this country.
2. LPG price is very very vurnerable to tax policy and supply.
3. LPG engine has quite annoying problem with cold start. The fuel will
freeze in the fuel line during the night in cold weather.
4. Once fuel line starts to leak, it's extremely hard to find the
problematic spot and fix it because its invisible. This is one of the
main reason that lots of taxi drivers in Korea complains his health problem.
If you're ok with the listed problem, yes you can use LPG and save you
I suppose its because gas fills a room much more quickly (poor
ventilation underground), so if a smoker walks in it all over in one big
bang. Petrol just causes a fire on the floor where the puddle is..
Or so the oil companies would like you to think :) I think they are
both an explosion hazard but public perception plays a role in policy
writing. Most people think that it's safer to have a rusting tin can
full of gasoline strapped under our cars than to have a a carbon fiber
wrapped aluminum bottle that is DOT tested every two years, full of
Hydrogen. So we have gas tanks instead of Hydrogen bottles.
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LPG has less energy in it than gas or diesel. *That* is the main
reason an engine running on LPG is less powerful than one running on
gas. Unleaded gas has approximately 114,000 BTU/gal, propane has only
84,300BTU/gal. to get the same amount of energy you need to burn 1.38
gal of propane for every gal of gas.
you're half right.... in cold weather, the LPG can't pull enough heat
out of the air to boil into a gas... this is why any proper LPG engine
(converted or otherwise) has a coolant loop in the LPG regulator and
can be started on gasoline.
propane leaks are easy to find...... just ask any plumber that does
Is the power decrease really noticeable? I reckon that 3.5L engine has
plenty of juice in it, so even if I lose 20% of power it will still be
BTW how much gas do you need to make one liter/gallon of LPG? Our house
heating uses gas, I could be making some LPG in basement ;-)
(Just kidding, I know it's dangerous, and probably illegal)
AFAIK it's always a good idea to warm up the engine on gasoline, and switch
to LPG afterwards. Gasoline is supposed to have better lubricative
properties or something...
Thanks for all the responses!
I've never driven a dual fueled road vehicle, but on off road
equipment (Bobcats, manlifts, saws, etc.) there is a big difference
between LPG and gas.
if your gas comes from a city service, it's most likely natural gas,
which has even less energy than propane (LPG). propane is sold by the
liquid gallon, CNG is sold by the cu ft..... which is 127cu ft to 1
gal of gasoline
:|(Just kidding, I know it's dangerous, and probably illegal)
nah.... you just don't gain anything.
no... it's just easier to start on gas as it doesn't depend on ambient
temperature to boil into a gas like LPG does. at work we have 115,000
BTU and 200,000 BTU LPG heaters... when you run either size on a tank
smaller than 100#.... they'll freeze up and quit working in about 30
mins as the smaller tanks can't pull the heat out of the air fast
In New Zealand LPG is readily available and has a price more stable than
petrol or diesel (currently LPG 67c per liter diesel 55c petrol $1.10 or
$1.15)LPG has been this pric for sev years as it isnt imported. Many people
here convert to a dedicated LPG system with no petrol option These start
perfectly even in extremly cold conditions and as they are tune exclusivly
for LPG they have next to no power loss although they drink the gas pretty
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