12mpg???
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12mpg???
Hi everyone really enjoy the site and have found it a great source of information.
Anyway have a 2003 4.0 disco auto with a few mods.
4.6 rods & crank
stump puller cam
10.5 compression ratio
Zavoli multi point LPG system
My query is 12 mpg all the time
120 mph = 12 mpg
65 mph = 12 mpg
stop start in town 12 mpg
towing the big caravan 12 mpg
All worked out from full to empty and not on a trip computer. So getting near nye 240 miles to a fill every time.
The question is surely I should be seeing some sort of change in fuel comsuption form blasting down the road to cruising down it.
I know she's a little down on what I used to get (14 mpg) but put this down to needing a service.
Anyone got any ideas
thanks kev
Anyway have a 2003 4.0 disco auto with a few mods.
4.6 rods & crank
stump puller cam
10.5 compression ratio
Zavoli multi point LPG system
My query is 12 mpg all the time
120 mph = 12 mpg
65 mph = 12 mpg
stop start in town 12 mpg
towing the big caravan 12 mpg
All worked out from full to empty and not on a trip computer. So getting near nye 240 miles to a fill every time.
The question is surely I should be seeing some sort of change in fuel comsuption form blasting down the road to cruising down it.
I know she's a little down on what I used to get (14 mpg) but put this down to needing a service.
Anyone got any ideas
thanks kev
Hi Kev, interesting you say that about fuel consumption...
I have a bog standard 1998 3.9 Disco 1
it is unmodified apart from the old (unknown) single point lpg system
i have owned it for almost 2 years and now covered 43000 miles
i have never managed 120 mph (not capable!) but at a steady 80to 85 mph i get 14 mpg
at a steadyish 65 it gives me 14mpg
stop start round town - 13 mpg
pulling a heavy double axle calf trailer - 13 mpg
yeah hardly any difference with mine either... i had noticed there wasnt much difference in but i've always just put it down to the v8 having so much torque it doesn't even notice that there's a trailer on the back
now I'm as puzzled as you are!
dave
I have a bog standard 1998 3.9 Disco 1
it is unmodified apart from the old (unknown) single point lpg system
i have owned it for almost 2 years and now covered 43000 miles
i have never managed 120 mph (not capable!) but at a steady 80to 85 mph i get 14 mpg
at a steadyish 65 it gives me 14mpg
stop start round town - 13 mpg
pulling a heavy double axle calf trailer - 13 mpg
yeah hardly any difference with mine either... i had noticed there wasnt much difference in but i've always just put it down to the v8 having so much torque it doesn't even notice that there's a trailer on the back
now I'm as puzzled as you are!
dave
SLICE
Hello there Dave
Started to think I had the lergy with no relies.
Did have a P38 Range Rover Supercharged Overfinch many moons ago.
On petrol not gas, got just over 21mpg at 70mph and wait for it around 6 when driven hard.
I think your right on the towing side as the disco goes like a freight train and have to keep looking in the mirrors to remind me that I have the van on the back.
Anyway will be dropping her into Energy Shift when I get back from the hols, just to see what they think.
Will post what Mike has to say.
kev
Started to think I had the lergy with no relies.
Did have a P38 Range Rover Supercharged Overfinch many moons ago.
On petrol not gas, got just over 21mpg at 70mph and wait for it around 6 when driven hard.
I think your right on the towing side as the disco goes like a freight train and have to keep looking in the mirrors to remind me that I have the van on the back.
Anyway will be dropping her into Energy Shift when I get back from the hols, just to see what they think.
Will post what Mike has to say.
kev
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I know it's been a while, but what ignition advance are you running?
I couldn't nget more than 10mpg when I first converted to LPG, after a bit of thought and research I advanced the origonal (6 deg BTDC) base timing +10 degrees, the engine note then transformed itself and saw a real improvement
I couldn't nget more than 10mpg when I first converted to LPG, after a bit of thought and research I advanced the origonal (6 deg BTDC) base timing +10 degrees, the engine note then transformed itself and saw a real improvement
Regards
Royston
Royston
Ignition Advance?
What's that?
It's a late Disco 2 (2004) with the Thor set. No dizzy.
Would love to play with the advance but it's the Bosch Motronics system. From what I know this can't be played with and is always being adjusted by the ECU.
Thanks for the suggestion Softdash3.9 and sorry its been so long.
Still waiting on my brother to finish getting it back together. Keeps telling me hasn't had the time lately. But has the time to buy a bl***y puppy
Anyway as soon as its back on the road will let everyone know what improvements have been found if any.
Thanks again
kev
What's that?
It's a late Disco 2 (2004) with the Thor set. No dizzy.
Would love to play with the advance but it's the Bosch Motronics system. From what I know this can't be played with and is always being adjusted by the ECU.
Thanks for the suggestion Softdash3.9 and sorry its been so long.
Still waiting on my brother to finish getting it back together. Keeps telling me hasn't had the time lately. But has the time to buy a bl***y puppy
Anyway as soon as its back on the road will let everyone know what improvements have been found if any.
Thanks again
kev
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Im guessing you have a mean average showing on the MPG meter, dont know how yous works, but try zeroing it and the watch it while you drive, if it has been collecting data for a while, it becomes slow to react with the more miles you have on the clock
THE SMOKING GNU
12.604 with an old boiler of a RV8 and no gas
WHY are there so many IANS on this site???????
12.604 with an old boiler of a RV8 and no gas
WHY are there so many IANS on this site???????
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My Disco II 4.0 returned about 15 on cruise, 13-14 on a fairly fast run, 14-15 towing and 12-13 round town. Very little difference really.
My current vehicle (5.7 V8 Hemi) returns 21 on cruise, 18 "spirited driving" and 19-20 towing, all on gas. On petrol it will return up to 28 cruise, but more normally around 24.
My current vehicle (5.7 V8 Hemi) returns 21 on cruise, 18 "spirited driving" and 19-20 towing, all on gas. On petrol it will return up to 28 cruise, but more normally around 24.
I've got a 3.5 pretty much standard apart from a unknown upgraded cam, edelbrock 4-barrel set up, a Mallory duel points and a RPi LPG sysyem with RPi AMP.
I've got this little lump in my Ex Ambulance LDV Convoy with is loaded most of the time weighing in at approx 2.8-3 Tonne! I manually calculate my fuel every fill up and I only use the LPG.
Most of the time and I get 10-11 pretty much all day long short journeys, long journey. When I'm on the motorway I might be lucky and get 12-13 but the motorway is not a place I end up often!
Like yourself I can't work it out
I've got this little lump in my Ex Ambulance LDV Convoy with is loaded most of the time weighing in at approx 2.8-3 Tonne! I manually calculate my fuel every fill up and I only use the LPG.
Most of the time and I get 10-11 pretty much all day long short journeys, long journey. When I'm on the motorway I might be lucky and get 12-13 but the motorway is not a place I end up often!
Like yourself I can't work it out
Cheers KC
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