Hi,
Does anyone know where I can get a good LPG kit from? or which kit is the best to use?
Cheers
LPG Kit for 325i Where can I buy a good full kit from???
Moderator: martauto
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Brianmoooore
- E30 Zone Team Member
- Posts: 49359
- Joined: Mon Jan 10, 2005 11:00 pm
A Prins VSI sequential kit is the best kit to use, but a simple lambda feedback controlled single point mixer system is perfectly adequate for a M20B25, and a hell of a lot cheaper!
It's easy enough to put together a kit using a mixture of second hand and new parts from ebay, and suppliers such as lpgsupermaket, WTV, and others. (Google "diy lpg conversion")
Go or the biggest tank you are prepared to tolerate, whether it is a cylinder tank in the boot, or a toroidal tank in the spare wheel well. A 630mm diameter tank is a perfect fit in an E30 well, and it's worth raising the boot floor a little to accommodate a slightly deeper one than one that fits flush, to get a little extra capacity.
It's easy enough to put together a kit using a mixture of second hand and new parts from ebay, and suppliers such as lpgsupermaket, WTV, and others. (Google "diy lpg conversion")
Go or the biggest tank you are prepared to tolerate, whether it is a cylinder tank in the boot, or a toroidal tank in the spare wheel well. A 630mm diameter tank is a perfect fit in an E30 well, and it's worth raising the boot floor a little to accommodate a slightly deeper one than one that fits flush, to get a little extra capacity.
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SeymourCake
- E30 Zone Regular
- Posts: 783
- Joined: Sat Mar 21, 2009 11:00 pm
Brian where can I get more information about LPG conversion?
For example how many MPG? Does performance get affected? Any drawbacks?
For example how many MPG? Does performance get affected? Any drawbacks?
CIRRUS BLAU
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Brianmoooore
- E30 Zone Team Member
- Posts: 49359
- Joined: Mon Jan 10, 2005 11:00 pm
There are quite a few on here who can answer your questions, and some on line forums that you can join, but to answer the questions you've posed:
You get the same mileage per unit weight of fuel from LPG and petrol, but because LPG is considerably less dense than petrol, the mileage per unit volume (e.g. MPG) drops by around 20%.
With a sequential injection LPG kit, performance should remain unaffected, but can be reduced if an inadequate kit is specified, or badly installed. Conversely, if your current petrol injection system is long overdue for an overhaul, then performance may be increased.
With a mixer system, there will be a small decrease in power, but in practice it's unnoticeable, and again may not happen if the current petrol system isn't 100%. Either way, the actual efficiency of the engine is improved.
The drawbacks are loss of boot space or your spare wheel, and you need to know where convenient places are to refuel. In my own case, as long as I'm going in one particular direction, there are two places I can refuel within five miles, but none at all in the other direction for thirty miles.
The advantages are that you can fill an 80 litre fuel tank for £58 instead of £110, and engine wear is massively reduced, since LPG doesn't cause bore wash while an engine is warming up, and oil contamination is reduced to near zero.
You get the same mileage per unit weight of fuel from LPG and petrol, but because LPG is considerably less dense than petrol, the mileage per unit volume (e.g. MPG) drops by around 20%.
With a sequential injection LPG kit, performance should remain unaffected, but can be reduced if an inadequate kit is specified, or badly installed. Conversely, if your current petrol injection system is long overdue for an overhaul, then performance may be increased.
With a mixer system, there will be a small decrease in power, but in practice it's unnoticeable, and again may not happen if the current petrol system isn't 100%. Either way, the actual efficiency of the engine is improved.
The drawbacks are loss of boot space or your spare wheel, and you need to know where convenient places are to refuel. In my own case, as long as I'm going in one particular direction, there are two places I can refuel within five miles, but none at all in the other direction for thirty miles.
The advantages are that you can fill an 80 litre fuel tank for £58 instead of £110, and engine wear is massively reduced, since LPG doesn't cause bore wash while an engine is warming up, and oil contamination is reduced to near zero.