Vehicle & Technical > Defender

Running LPG mostly and petrol only occassionally

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thermidorthelobster:
Not familiar with those carbs, but on SUs you have the oil damper chamber on top.  Some LPG systems connect the top of the chamber to the vacuum, so that when you're on LPG, the piston's pulled out of the way.  This also, over time, sucks the oil out, and you need to fill them up with oil (2 in 1 or something like that usually).

David

davidjmiller:
....there you go you see, that's what this place is all about. Thanks Fat Controller - I might just take you up on that. And if you're down Swavesey way - drop me a pm.

By the way - which is better - the coffee or the advice  :wink:

On a more serious note for you LPG-users. Tinleytech (www.tinleytech.co.uk), a few miles south of here in Bourn, run an 1-day LPG fitters course. They've also offered to do me a 2 hour keep your lpg system purring course.

What thoroughly smashing chaps eh??

David

Range Rover Blues:
I don't know much about running LPG on SUs other than you should have a piston lifter to prevent wear in the carb (oh, that might be relevant) but I run LPG on 3 EFi Rangies.

My advice would be get it running on petrol first, LPG is much harder to get right.
It takes more igniting so close up your plugs to 27 thou and fit geniune Lucas ignition parts, LPG is much harder to ignite and fault become aparent that weren't htere on petrol
it burns slower, you can advance the timing but you don't have to
it has a higher octane rating so you can advance the timing
it burns hotter so you might need a cooler plug
BP6ES are a good plug, run without resistive plugs if you can but BPR6EIS are very good, I can get them for £50 a set (8)
LPG doesn't lubricate your valves , I advise a flashlube kit
You should run on petrol every day until your engine warms up otherwise the LPG mixture can be compramised by freezing in the reducer
LPG will clean your engine, partly because it contains more hydrogen than petrol and partly because it doesn't create black combustion by-products
your oil will stay cleaner for longer on LPG

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