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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 06-05-2009, 04:59 PM   #1
dinac
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LPG conversion 330i...

i did it today ..
just posting pictures, because when i was looking for some info about that on this forum i didnt found anything....
it was some discount so i did it.Price was around 1100eur + atest 200eur=1300 eur= 1900$
1 L od lpg gas is here in Croatia =0,46 eur/L
on some calculation the conversion will "pay out" for 15.000km
for now i dont know how much it consumption, they said it will be 10-15% more
The car is going same as on gasoline
The tank is 73 Liters





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Old 06-05-2009, 05:01 PM   #2
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i have no idea what i'm looking at, not gonna lie
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Old 06-05-2009, 05:02 PM   #3
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me too what is that thing???

is it the thing to make it more energy efficient?
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Old 06-05-2009, 05:05 PM   #4
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i have no idea what i'm looking at, not gonna lie
Liquid Petroleum Gas conversion.

He's saying that it will pay itself off in 15,000km of travel, IF LPG stays the same. The consumption rate of LPG is higher, but the costs are significantly less.
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Old 06-05-2009, 05:08 PM   #5
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i saw this on a show called "wheeler dealers" which they tried to convert an old range rover to run on lpg. apparently lpg is so much cheaper that it offsets the consumption (at least on a range rover, dunno about more efficient engines though). but it does require equipment, money, and the car has to be able to pass emissions with its standard engine.
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Old 06-05-2009, 05:09 PM   #6
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Croatia gas price per gallon is: $4.81 us dollar conversion
Croatia LPG price per gallon is: $2.43 us dollar conversion

He's using 15% more fuel to drive tho, so his costs are increased on the LPG mpg rate. It's still cheaper than gasoline, said to be as powerful (doubt it), and very clean.
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Old 06-05-2009, 06:06 PM   #7
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Where is the tank - in the trunk?
Do you feel loss of power? Check engine light?
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Old 06-05-2009, 06:18 PM   #8
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It's usually about a 10% power loss, but when you consider that these cars have a very high compression ratio it may cause a greater power loss. I think LPG is something around the equivalent of 80 AKI gas, so if your car can run normally on like 87 then you might not have as many problems. I really wouldn't recommend ****ing around with the M54 on what fuel you put in, the engine can only retard the timing so far and they need a high AKI fuel because of the high compression ratio to function properly. If you're worried about fuel consumption, put that 1,900 dollars towards a "beater" car that will run till it dies and doesn't use very much fuel.

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Old 06-05-2009, 06:19 PM   #9
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Was watching "Wheeler Dealers" on TV the other day and they attempted to do this on a Range Rover... and failed miserably. Haa

Here's the video of how to do the conversion:
Start at 1:50:


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Old 06-05-2009, 06:42 PM   #10
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It's usually about a 10% power loss, but when you consider that these cars have a very high compression ratio it may cause a greater power loss. I think LPG is something around the equivalent of 80 AKI gas, so if your car can run normally on like 87 then you might not have as many problems. I really wouldn't recommend ****ing around with the M54 on what fuel you put in, the engine can only retard the timing so far and they need a high AKI fuel because of the high compression ratio to function properly. If you're worried about fuel consumption, put that 1,900 dollars towards a "beater" car that will run till it dies and doesn't use very much fuel.
i thought lpg was HIGHER? at least according to the articles ive read about it.
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Old 06-05-2009, 06:49 PM   #11
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Liquid Petroleum Gas conversion.

He's saying that it will pay itself off in 15,000km of travel, IF LPG stays the same. The consumption rate of LPG is higher, but the costs are significantly less.
thank you
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Old 06-05-2009, 06:58 PM   #12
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i thought lpg was HIGHER? at least according to the articles ive read about it.
I was always under the assumption it was lower, but you might be right as i'm just working off memory.

Hmm, you might be right actually. Looks like its 108 RON.. Either way, i'm still not going to recommend it. These cars were made to run on good ol' petrol, not silly propane and I can anticipate you'd have quite a few problems down the line in regards to engine wear and decreased performance. The availability of LPG at gas stations should be taken into account as well. Just because it can be done doesn't generally mean it should be done. As I said before, get a less complex car with a less complex engine/DME/monitoring systems (i.e. Carby like the video said, no VANOS/VANOS equivalent, low compression ratio) if you want to do it.

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Old 06-06-2009, 05:35 AM   #13
dinac
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Quote:
i have no idea what i'm looking at, not gonna lie
hahah i know that many of you dont know about that conversion
In the Europe is very popular in these days

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Originally Posted by Megalocnus View Post
Where is the tank - in the trunk?
Do you feel loss of power? Check engine light?
yes , instead of spare tire
no power loss, it is the new system landirenzo omegas. On old systems where some power loss, not on this one
no check engine ofcourse
and it is cleaner for environment that gasoline
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Old 06-06-2009, 05:58 AM   #14
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Originally Posted by braymond141 View Post
Croatia gas price per gallon is: $4.81 us dollar conversion
Croatia LPG price per gallon is: $2.43 us dollar conversion

He's using 15% more fuel to drive tho, so his costs are increased on the LPG mpg rate. It's still cheaper than gasoline, said to be as powerful (doubt it), and very clean.
A wet kit is to have the same power output. I have been thinking of a conversion too, but I'm concerned about the additional weight it would put on my car...
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Old 06-06-2009, 06:19 AM   #15
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Highly popular conversion in Europe, especially on imported American muscle cars, but this is the first time I've seen it done on a more sophisticated engine!
(no offense but I guess I can safely say that a 1980's Corvette does not have any form of sophistication to the engine... 200hp from 350ci (lol?))

Since we pay more than $7 per gallon of petrol in the Netherlands you can imagine that driving an old muscle car isn't a lot of fun for your wallet. We have our own natural gas reserves so lpg costs not even a third of that
But I'd be interested in seeing how this works out for you in the long run. How much does the whole system weigh?
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Old 06-06-2009, 06:30 AM   #16
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Oh you've already done it... I need to read more

On a side note, great looking cars you have there. The E46 looks really really nice, and the CF trim works with the interior

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Old 06-06-2009, 07:13 AM   #17
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i have no idea what i'm looking at, not gonna lie
hahahah I was thinking the same thing
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Old 06-06-2009, 08:34 AM   #18
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I was always under the assumption it was lower, but you might be right as i'm just working off memory.

Hmm, you might be right actually. Looks like its 108 RON.. Either way, i'm still not going to recommend it. These cars were made to run on good ol' petrol, not silly propane and I can anticipate you'd have quite a few problems down the line in regards to engine wear and decreased performance. The availability of LPG at gas stations should be taken into account as well. Just because it can be done doesn't generally mean it should be done. As I said before, get a less complex car with a less complex engine/DME/monitoring systems (i.e. Carby like the video said, no VANOS/VANOS equivalent, low compression ratio) if you want to do it.

In the video above they did the LPG conversion on a Range Rover - running a BMW v8...
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Old 06-06-2009, 08:47 AM   #19
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In the video above they did the LPG conversion on a Range Rover - running a BMW v8...
Remember though that the M54 and M62 engines are very different.. I'm not saying that it wouldn't work straight up on an M54 engine (because it obviously does), but more just because it holds up on the M62 doesn't mean it will work as well on the M54.
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Old 06-06-2009, 10:04 AM   #20
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Remember though that the M54 and M62 engines are very different.. I'm not saying that it wouldn't work straight up on an M54 engine (because it obviously does), but more just because it holds up on the M62 doesn't mean it will work as well on the M54.
True true. Although I have to give props to anyone willing to do something like this to their car. You know that you are messing with engine design and that things may happen as a result of it... But you're also doing something great for the environment and doing your own small part to help stop the West's reliance on the Middle East for oil...
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