help needed lpg

jeffo · Sep 9, 2010

hi i have a 3.5 v8 disco i have lpg pipe going into the air intake pipe but have no stepper motor no lpg ecu in fact nothing only a hand turning adjuster,can i get a steeper motor with ecu to work off the lamba sensor as i only get 90 miles on 50 liters lpg

Ragtag · Sep 10, 2010

jeffo said:
hi i have a 3.5 v8 disco i have lpg pipe going into the air intake pipe but have no stepper motor no lpg ecu in fact nothing only a hand turning adjuster,can i get a steeper motor with ecu to work off the lamba sensor as i only get 90 miles on 50 liters lpg

Short answer....yes you can.

Longer answer......Are you jumping to conclusions? 8 mpg is rubbish but what do you get on petrol? Is there a big difference?

There is nothing wrong with a correctly adjusted 'open loop' system (manual power valve as you describe) and doubt if changing to closed loop will improve your consumption by more than a couple of mpg unless the current system is really badly adjusted. How many turns out from fully closed is the valve?

For reference, I have open loop feeding twin SU's and get upset with less than 14mpg from mixed motoring.

Cheers

Chris

Beast o Bodmin · Sep 10, 2010

get yer foot down ya soft git i used ta get mine down to 7mpg ha ha ha ha

jeffo · Sep 10, 2010

i will have a look on the weekend,as i used to get 115 miles on 32 liters of gas on the moterway at a steady 60

robrennie · Sep 10, 2010

I have a 3.9 with carbs and getting 13 when I measure it favourably - when I drive properly - I get much less.

Funny enough, Greenpeace have stopped sending me Christmas cards.

fett · Sep 10, 2010

fook em , bunch of lefty brighton dwellers!

help needed lpg

jeffo

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Ragtag

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Beast o Bodmin

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jeffo

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robrennie

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fett

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