Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[mathewst]

Finally got the mig back from the lpg installers shop.
Must admitt they did a great job.
So was wandering now about one thing.
Average consumption on the trip computer, do the rest of you have it (probably Tunnie could share some light since his is 2.2)?
Mine is showing consumption still although it is increased ( it probably should be when it is working on lpg)
I never tried to figure out how the trip computer works but I was surprised this works on lpg.
Oh by the way lpg is BRC sequent

[tunnie]

ignore the trip computer now, it will be talking 'dangle berries'  - Its calculations are assuming your running on petrol.

Infact MPG now your on gas, is not the way to measure economy, its pence per mile 

LPG has less 'bang per litre' compared to petrol, so you need more (hence drop in mpg) So fill it up, zero the trip, and work it out the old fashioned way.

When prices where cheaper (i was paying 57p litre on my commute days) i could get cost down to 10.3p a mile on average, where as petrol was costing me 17p per mile.
 

[PhilRich]

ignore the trip computer now, it will be talking 'dangle berries'  - Its calculations are assuming your running on petrol.

Infact MPG now your on gas, is not the way to measure economy, its pence per mile 

LPG has less 'bang per litre' compared to petrol, so you need more (hence drop in mpg) So fill it up, zero the trip, and work it out the old fashioned way.

When prices where cheaper (i was paying 57p litre on my commute days) i could get cost down to 10.3p a mile on average, where as petrol was costing me 17p per mile.
 

Or in your case Mathew, Lipa or Kuna per Kilometer!

[tunnie]

in day-day terms it saved me about £10 per day in fuel 

[zirk]

The Consumption both Instant and average should work on LPG, assuming it been installed correctly, it will probably read arround 10% lower than on petrol.

The bit that probably will throw a wobbly is the range display, as this will still read the petrol tank.

Chris:y

[zirk]

ignore the trip computer now, it will be talking 'dangle berries'  - Its calculations are assuming your running on petrol.

Infact MPG now your on gas, is not the way to measure economy, its pence per mile 

LPG has less 'bang per litre' compared to petrol, so you need more (hence drop in mpg) So fill it up, zero the trip, and work it out the old fashioned way.

When prices where cheaper (i was paying 57p litre on my commute days) i could get cost down to 10.3p a mile on average, where as petrol was costing me 17p per mile.
 

Consumption Computer works fine on mine, in fact its bang on when compered to an LPG brim to brim.

But as said before the Range bit gets confused.

Chris.

[mathewst]

Actuallly Zirk it is reading about 10% more than on petrol.
If  my maths is still good I should be saving around 6 pounds per 100 km in town and around 2.7 pounds per 100 km on open road.
Tunnie thanks for a quick reply ("no wander you got that  "Over active poster" title 

[tunnie]

MPG on the MID is calculated from engine ECU & injectors, it measures the consumption used compared to distance travelled. When LPG cuts in, its the LPG ECU doing the control, petrol no longer comes into it.

The mpg you get on the MID is from when its only running on petrol, and given that it only runs for a few mins on petrol, thats the mpg you see.

Mine says 29mpg but there is no way its doing that on gas.

[tunnie]

Actuallly Zirk it is reading about 10% more than on petrol.
If  my maths is still good I should be saving around 6 pounds per 100 km in town and around 2.7 pounds per 100 km on open road.
Tunnie thanks for a quick reply ("no wander you got that  "Over active poster" title 

Thats bigger saving than what I would get, my old 150 mile daily commute saved me £10-11 ish.

So you saving £6 per 62 miles? Thats damn good!   

[mathewst]

The mpg you get on the MID is from when its only running on petrol, and given that it only runs for a few mins on petrol, thats the mpg you see

Actually this value is changing constantly, for instance if I start the car it consumes petrol and this is calculated, after it reachec certain temp it automatically converts to lpg and the consumption value is still being calculated all the way and it is different from the one calculated before the lpg (higher for some 12%)
Here gas is relatively cheap so that is the reason for bigger savings I guess

[cem_devecioglu]

Finally got the mig back from the lpg installers shop.
Must admitt they did a great job.
So was wandering now about one thing.
Average consumption on the trip computer, do the rest of you have it (probably Tunnie could share some light since his is 2.2)?
Mine is showing consumption still although it is increased ( it probably should be when it is working on lpg)
I never tried to figure out how the trip computer works but I was surprised this works on lpg.
Oh by the way lpg is BRC sequent

actually your petrol ecu is still thinking the car is using petrol because lpg ecu uses petrol ecu signals to arrange its injection timing..  although not 1 to 1, still your lpg consumption is proportional to MID reading..

[albitz]

MPG on the MID is calculated from engine ECU & injectors, it measures the consumption used compared to distance travelled. When LPG cuts in, its the LPG ECU doing the control, petrol no longer comes into it.

The mpg you get on the MID is from when its only running on petrol, and given that it only runs for a few mins on petrol, thats the mpg you see. Mine says 29mpg but there is no way its doing that on gas.

Wrong.

[tunnie]

MPG on the MID is calculated from engine ECU & injectors, it measures the consumption used compared to distance travelled. When LPG cuts in, its the LPG ECU doing the control, petrol no longer comes into it.

The mpg you get on the MID is from when its only running on petrol, and given that it only runs for a few mins on petrol, thats the mpg you see. Mine says 29mpg but there is no way its doing that on gas.

Wrong.

Then tell me, how does the engine/petrol ECU know how much gas is being used  :-?

It can't, the MID tells rubbish when running on gas. Its designed for petrol use!

[zirk]

Actuallly Zirk it is reading about 10% more than on petrol.
If  my maths is still good I should be saving around 6 pounds per 100 km in town and around 2.7 pounds per 100 km on open road.
Tunnie thanks for a quick reply ("no wander you got that  "Over active poster" title 

When you say more, do you mean more comsuption, that may be right on yours, cant remember now what Opels display on the MID, per litre, seem to remember its something like liters per 100 km which is the other way round to our miles per gallon (MPG).

On mine it reads about 10% less, ie if I criuse on petrol say 33mpg, switch to gas it drops to about 29/30 mpg, ie less mpg but higher consumption.

Chris.

[zirk]

MPG on the MID is calculated from engine ECU & injectors, it measures the consumption used compared to distance travelled. When LPG cuts in, its the LPG ECU doing the control, petrol no longer comes into it.

The mpg you get on the MID is from when its only running on petrol, and given that it only runs for a few mins on petrol, thats the mpg you see. Mine says 29mpg but there is no way its doing that on gas.

Wrong.

Then tell me, how does the engine/petrol ECU know how much gas is being used  :-?

It can't, the MID tells rubbish when running on gas. Its designed for petrol use!

Well, all I can say Tunnie is its works fine on mine, so guessing my LPG ECU must talk to the Main ECU.

If on a long run, while on Gas  if I reset the average MPG, the Trip Millage and Trip Gallons its all bang on as it should be, and Im not talking about a few miles on Petrol before it goes to Gas on start up, Im talking about a 200 plus trip on LPG.

Chris.