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This Article was reproduced with the kind permission of CHRIS PERFECT

So now you have the new LPG tank installed in the back of the Range Rover and the feed pipe clipped along the top edge of the chassis, together with the electrical feeds from the gauge and solenoid. Now it's time to tackle work in the under-bonnet area.

A major consideration is a location for the largest item, the vaporiser. The instructions give advice, stating that the unit should face inwards - against either side - but not facing front or rear, It should be placed below the level of the top of the radiator so that any air in the system will escape. The second battery space at the front nearside is ideal, If this is occupied by a battery, there is room on the off-side, below the radiator reservoir. This will also determine which side of the chassis the feeds from the tank follow.

Take time to plan the layout of pipes and wiring, ensuring a tidy layout. The enclosed instructions made all this quite clear but it's important to read them through carefully and apply them to your own vehicle. All pipes, hoses and wiring are secured with clips and ties, or in a loom, as supplied.

Detailed step-by-step guidance is also given for setting the final fuel mixtures, both with the aid of a good gas analyser and without one. A vacuum gauge can also be used to establish final setting and also to monitor the system as you drive. These are available as an extra to the kits. If using a gas analyser it must be a professional-quality one, because the readings are very low.

1. The Vapouriser reduces LPG pressure so that it vapourises as a low pressure gas

2. The vapouriser mounting plate fits into a slotted space in the back of it.

3. At the back of the engine the heater pipes are cut and two T pieces inserted to supply water to the vapouriser

4. The vapouriser is bolted down and the LPG combined filter/solenoid mounted next to it. Here the ECOMAX can be seen in the low pressure feed hose

5. The 3 connections of the LPG feed pipe are compression type. they will be leak tested later

6. A short link pipe takes the LPG from the solenoid valve into the vapouriser

7. The electrical feed from the rear consists of an earth (yellow), a blue which connects through the dash to the gauge and a brown which operates the on/off solenoid valve

8. The petrol cut-out solenoid is fixed to the bulkhead and the petrol pipe redirected through it

9. There is a manual override as well. The ecomax connection spigots are secured with special lock tabs

10. These hose clips must not be too tight. The valve will adjust the gas flow according to engine demand

11. From the Ecomax the gas feed pipes divide to each carb. TheY piece has an adjuster for maximum flow setting

12. In this system the gas is fed into the airstream through the venturi mixer which slides inside the tube.

13. The larger angled spigot takes the gas into the mixer

14. A 16mm drill is needed to drill the elbow.

15. This is anothersolenoid which connects manifold vacuum to the carburettor necks

16. The neck of the carb is drilled and tapped with a 6mm thread

17. A small spigot is then screwed carefully into the tapped thread

18. The solenoid is fixed in front of the carbs and Y pieces link up with the manifold tapping

19. If the rocker breathers are redirected to the new inlet on the elbows the old inlets on the carbs need capping

20. It's important that the fan or vehicle movement does not presurise the air entering the air cleaner. Here a baffle plate was fitted.

21. The poppet valve in the carb butterflies can sometimes cause problems. Here they were soldered shut

22. the connections to the control relay include a wire wrapped around the HT lead which switches the system off and closes the solenoids if the engine stops

23. The dashboard switch has LPG, PETROL and OFF positions. The LEDs show the tank contents.

24. All the connections for the switch were on the wiring diagram, a fuse is also fitted

25. After final checks and tests with some LPG in the tank the system can be adjusted to the optimum mixture setting
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