Go LPG! Research
34 X 350 3.5 and 4.2 conversions completed


Go LPG are well established as the UK's premier X350 LPG conversion company

Jaguar XJR (Aluminium body) 3.5 and 4.2 Litre V8

Go LPG like to keep up with the times, especially on the high performance and bespoke coversion front. We like a challenge! The Aluminium bodied X350 saloon was a natural progression for us.

New Conversions like this require a lot of research on the model, and a lot of long term testing after the conversion is complete. The aluminum body makes life less simple as one has to be aware of the harmful cathodic effect that steel nuts and bolts can have on it. Further complication is provided by having to move the air supsension units fitted in the boot, and finding a way to keep the sensitive engine management system happy. To do that, we usually buy a car and use it as a test bed. The investment is always worth it as we are often the first to undertake such a conversion and, until others copy us, the only company able to offer it to the public.

Current prestige car values (Nov '09) allow you to buy a car like this ( 4.2 cost new 59k) for a fraction of its original price, and Wow! You get an awful lot for your money... The V8 engine has been uprated to 4.2 litres and 340 BHP although the car has lost weight - The use of Aluminium makes the X350 a whopping 165 Kg's lighter than the older XJ8 model, and 360 Kg's lighter than a BMW 7 Series, making it both faster and more fuel efficient. It'll be even better on LPG..... Go an buy one today!

We took a careful look at all of the LPG equipment currently on the market to convert this car. I had a firm target of full performance on LPG with no change back to petrol at any speed. Only one or two kits seemed like they might be up to be up to the job but there was always some compromise that wasn't acceptable. At about the same time, the new OMVL adaptive system was just about to be released. One of the first kits in UK was delivered without delay. After development the job was completed and all of the targets were achieved. It is impossible (even for me) to tell which fuel the engine is running on and just as impossible to find the limit of the car's performance on LPG on today's roads.

We have all of the data recorded to convert your X350 V8 with no problem at all. The job takes around 10 days including extensive set up and road testing.


The 4.2 litre X350

The 4.2 litre X350 is very light, due the all - aluminimum body. During hard acceleration it isn't much slower than the supercharged XJR model but mechanically things are a lot more simple. On a motorway the car slips along at 85 MPH with the engine virtually idling at exactly 2000 RPM. This is thanks to the 6 speed gearbox. On petrol these cars will return 31 mpg under motorway conditions. When run on LPG that puts the relative fuel economy in the 50 + bracket.


The 3.5 litre X350

The 3.5 litre X350 is just as light, due its all - aluminimum body. It is a whopping 360 Kg's lighter than a BMW 7 series - the weight of 4 adults. During hard acceleration it isn't much less responsive than the 4.2 model due to some intelligent gearbox re-programming. On a motorway the car slips along at 75 MPH with the engine virtually idling at exactly 2000 RPM. This is thanks to the 6 speed gearbox. Running on petrol these cars will return 34 mpg under motorway conditions. Running on LPG, that puts the relative fuel economy in the 60+ bracket, knocking Diesel versions for six.



Here are a few pictures of the Go LPG X350 V8 conversion;

Wonderful, fast, affordable cars.

We teach them the economy trick, completing the package.

The latest generation of OMVL multi point gas injection equipment allows us to convert the car so well that it is practically impossible to find any difference in performance. Only the cost of running the car is seriously reduced.

Under the Bonnet, there is absolutely nothing to be seen.
Our careful research and development has brought something unavailable until now.....

The totally invisible LPG conversion. This has benefits beyond mere aesthetics - Ordinary service agents need not worry about any LPG conversion components restricting their access to routine maintenance items.

The small coin pocket on the driver's right is the best site for the fuel changeover switch. It is easy to reach and operate. Fuel contents can be checked at a glace but the display does not distract you whilst travelling at night .
Tanks must be of the 4 hole type for this conversion, choices range between 70 - 91 litres. Here you can see the 91 litre toroidal (spare wheel) tank.


The boot floor panel closes completely flat. Plenty of space left if you carry a space saver spare wheel.
The LPG filler is fixed to the body at the bottom edge of the rear bumper, just about the only position that will conform to regulations but remain easy enough to use without kneeling. This avoids cutting nasty holes in the bodywork and it must be remembered that Aluminium is far less able to resist panel rippling than a Steel panel would be. A coil is put in the filler pipe to prevent it fbreking off during a rear - end shunt, but even if the pipe where completely severed the non-return valve in the tank would stop any significant leakage. All that can escape is the gas content of the pipe since the last fill.

To learn more about fillers and the regulations that control their positioning, click 'Fillers'

Using this type of filler not only avoids cutting a hole in the car's rear wing or bumper. Unlike a side-mounted filler point, it can be used with a filling pump on either side of the car.

Contact us to arrange the conversion of your X350 V8 using the latest OMVL Adaptive injection system

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LP Gas burns cleanly.....

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