taking the plunge LPG

my understanding is the only improvement is the one that matters - pence per mile. Power should be about the same, and mpg will technically be lower.

Si (waiting to get his disco done)

If set up properly then power should be the same. MPG on gas will be slightly down from petrol (my car gets 22-24mpg on gas compared to 25+ on petrol) You will also have to spend extra money and time keeping your ignition system up to scratch as LPG is much more demanding of a good spark.

On or around Fri, 14 Apr 2006 08:47:33 +0100, Tom Woods enlightened us thusly:

You only get the same power by burning more fuel. So your maximum power will be down a bit.

If you don't get 80% of the petrol MPG there's something wrong with it, and it should be possible to start it on gas from stone cold, again, if it won't, there's something wrong with it, so don't be fobbed off.

On SU-carbed or similar engines with dashpots on the carbs, it's possible for all the dashpot oil to slope off (no, I don't know how) and this to cause problems when you try to run on petrol after several months of running on gas.

There's also an argument in favour of fitting carb piston lifters. This is supposed to reduce wear and tear on the needle and its jet from running dry. I don't know whether this is really necessary though.

In message , john oakes writes

How many miles a year do you do ?

Mine certainly is! I have had it professionally retuned and concluded the mixer is probably unable to deliver sufficient gas at full throttle. It is a landi renzo fitting (89 110 V8 SU) and open loop. I feel certain a closed loop would have paid for itself but wasn't offered at the time I converted.

I actually logged my consumption for the first couple of years and it was near enough 75% of petrol, pretty much the same as calorific value. I start and run mine entirely on lpg unless I run out. I have found no cheap lpg outlets around here (NW Surrey) but lpg is still

AJH

I used to get around 2.5 miles/litre of lpg (11-12mpg) with my 3.5 carburetor Range Rover.

Including 80 quid a set HT Magnecor plug leads, if you believe some folk.

And you may spend quite bit driving round finding somewhere that sells the stuff (at 20p /mile it mounts up), which you'll need to do far more often than you'd think, unless you're spending a fortune on fuel tanks and/or losing half your load space. The trouble with a 48 litre (usable) tank is that after 80 miles you start looking for the next lpg filling station, given that there aren't all that many of them, that a lot of them are only open "office" hours, and that those that are open may well not have a working pump. Don't assume you'll always fill up at Morrison's, unless you only make a limited range of journeys and drive past one.

And you may (or may not, if you're lucky) either be faced with a more limited choice of insurance company, or a higher premium.

The stromberg CD-175 carb (or is it CD-150?) on my car runs fine with no oil in. Revs are a bit 'sticky' on petrol but that doesnt realy bother me since i only use it when i run out of gas.

Some V8's and the 2.6 LR's used the same carb so they should be fine too.

On or around Fri, 14 Apr 2006 11:15:29 +0100, Tom Woods enlightened us thusly:

every engine is different. The SU carbed minibus I had, 2-litre O series, refused to start at all with no oil in the dashpot. Others will start but not idle, or run more or less normally.

Marc Draper uttered summat worrerz funny about:

Nice little conversion cost routine malarky wotsit thingmobob here.

Thanks for the replies. I will try and keep a log of the difference. At the moment I do about 100+ a week and the tank I will be fitted where the bench seat on my 110 nearly full length.

regards john

Gordon Brown has heard this rumour that yet another 4x4 will be going to LPG anymore of this, and he will be selling LPG for about 95p Ltr. GGJ