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[Arpy]

just had my car converted and so far so good but just wanted to know from someone who has converted how does the pump know when to stop putting gas in I have a 59 litre tank and it stops at 45 i know they are supposed to have a certain amount of space what is the %.
Also my car averaged about 27 mpg now its 21 i thought the new lpg systems where more or less the same as petrol??

[TheBoy]

Martin Imber will be able to answer fully.

Howver, tank capacity is about 75% of its stated capacity, and economy is normally a good 10% lower than petrol.

[Arpy]

how do i get touch with martin

[TheBoy]

how do i get touch with martin

He'll respond soon enough, as will other LPGers I expect.

[Danny]

half price fuel though!!!

[Craig_R]

I have a 65 or 70 litre tank in my car and i can only get 55 litres in it.

Its a safety Thing so the Gas can Expand and pressure and stuff.

There is also a pressure valve on the tank for venting gas for say you fill up at night when its cold the LPG takes up less room and then if you have not used much and its a Hot morning the gas expands and needs to be vented to help not stress the tank under pressure

[The Cambelt Kid]

My 2ltr Omega has an 80L tank and I can squeeze in 65/66 lts of LPG at the pump.  I have just bought another 80ltr tank for my V6 conversion so I guess I’ll fit in about the same.

Power seemed to be down a fraction when I first did the conversion, although having just replaced the cam sensor I have seen a slight improvement!

I managed to get to north Wales and back on £25 of LPG which is a touch under 400 miles!  

[JamesV6CDX]

Althought not a Meega, I have a Vauxhall with factory fit SGi gas, savings are immense. I can do 150 miles on £8...

[Martin_1962]

They have a valve like a toilet cistern - uses the fluid level.

You will get about 10 to 20% worse consumption as there is less energy in a litre of propane than petrol

[Taxi_Driver]

They have a valve like a toilet cistern - uses the fluid level.

You will get about 10 to 20% worse consumption as there is less energy in a litre of propane than petrol

As Martin says.....its normally 20% less than cylinder size to allow for expansion....pray it breaks and you can over fill it  

I was getting av 20mpg outa my 2.2.....but its gone to 22/23mpg now.....so your about right  

[Arpy]

thanks for input interestly yesterday managed to get 49.5 litres compared to day before only 45 .5 so temp is important factor.
just wondering if the brass screw on outside of tank is the pressure valve for tank and if so can you adjust it?

[Taxi_Driver]

thanks for input interestly yesterday managed to get 49.5 litres compared to day before only 45 .5 so temp is important factor.
just wondering if the brass screw on outside of tank is the pressure valve for tank and if so can you adjust it?

Did you fill up at the same place? Coz some pumps dont actually put in as much as they say.....its not monitored by any authority....if you get my gist  

As Martin says it works on float system for the filling......dont go fiddling with it  

[Arpy]

yes it was same pump
is your sytem a new type ie sgi cos from all info i have read new type was supposed to be very close to petrol so if 20% on new type how bad was the old system

[TheBoy]

yes it was same pump
is your sytem a new type ie sgi cos from all info i have read new type was supposed to be very close to petrol so if 20% on new type how bad was the old system

10 - 20% just because lpg has less energy per litre than petrol.

Mixers not much less uneconomical.

[Taxi_Driver]

yes it was same pump
is your sytem a new type ie sgi cos from all info i have read new type was supposed to be very close to petrol so if 20% on new type how bad was the old system

Yes mine is sgi.....and as TB says calorific value is lower so you use more...you must notice you have less power on lpg....so probably put your foot down more......like me...so use more lpg