co2 emissions?
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- ajsimmo
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Re: co2 emissions?
CO = 0.1%, HC = 50
You do know you're supposed to test with the engine running?
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You do know you're supposed to test with the engine running?
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WBX Rebuilds & Upgrades from the beautiful Isle of Arran
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- Ciaraneng
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Re: co2 emissions?
ajsimmo wrote:CO = 0.1%, HC = 50
You do know you're supposed to test with the engine running?
I’m not making those numbers up...
I was putting the results down to the quality of my rebuilding but you are bursting my bubble.
Maybe the MOT kid didn’t know he had to put the pipe on the exhaust?
1983 High Top 1.9 Petrol Early DG Engine
Re: co2 emissions?
Tested today. Similar HC reading. 2.1 DJ auto. Has a tendancy to cut out now and then. But a good runner. About 19mpg
MaxStu
1989 DJ 2.1 Auto Leisuredrive rusty bucket.
1987 DG1.9 LPG Auto Autosleeper
"Blissfully happy in your presence".
1989 DJ 2.1 Auto Leisuredrive rusty bucket.
1987 DG1.9 LPG Auto Autosleeper
"Blissfully happy in your presence".
- ZsZ
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Re: co2 emissions?
You can only estimate by calculating the theoretical amount
http://ecoscore.be/en/info/ecoscore/co2" onclick="window.open(this.href);return false;
http://ecoscore.be/en/info/ecoscore/co2" onclick="window.open(this.href);return false;
Zoltan
1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
5spd custom box 4.57 diff + 0.74 5th
1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
5spd custom box 4.57 diff + 0.74 5th
- ajsimmo
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Re: co2 emissions?
Good link, thanks.
I like the bit that shows one way that LPG is better for the environment:
Diesel = 132g CO2/km
Petrol = 120g CO2/km
LPG = 83g CO2/km
That's a massive difference, even allowing for slightly reduced mpg on LPG.
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I like the bit that shows one way that LPG is better for the environment:
Diesel = 132g CO2/km
Petrol = 120g CO2/km
LPG = 83g CO2/km
That's a massive difference, even allowing for slightly reduced mpg on LPG.
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Re: co2 emissions?
ajsimmo wrote:Good link, thanks.
I like the bit that shows one way that LPG is better for the environment:
Diesel = 132g CO2/km
Petrol = 120g CO2/km
LPG = 83g CO2/km
That's a massive difference, even allowing for slightly reduced mpg on LPG.
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And yet my mates Citroen C3 diesel 1400 car tax is £30 annum. against my last LPG Camper RFL tax of £270. Do we feel an injustice?
MaxStu
1989 DJ 2.1 Auto Leisuredrive rusty bucket.
1987 DG1.9 LPG Auto Autosleeper
"Blissfully happy in your presence".
1989 DJ 2.1 Auto Leisuredrive rusty bucket.
1987 DG1.9 LPG Auto Autosleeper
"Blissfully happy in your presence".
- 937carrera
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Re: co2 emissions?
ajsimmo wrote:Good link, thanks.
I like the bit that shows one way that LPG is better for the environment:
Diesel = 132g CO2/km
Petrol = 120g CO2/km
LPG = 83g CO2/km
That's a massive difference, even allowing for slightly reduced mpg on LPG.
Slightly unfair though because the energy content of the fuels is different, so using the same volume of fuel per distance is not comparing apples with apples
Good find though - he must have had a good mole to find that.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
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- Oldiebut goodie
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Re: co2 emissions?
My euro6 is £140 pa (standard rate).
To get £30 ved it must have been registered 2001 - 2017 and is in band C.
All the differing rates are a minefield.
To get £30 ved it must have been registered 2001 - 2017 and is in band C.
All the differing rates are a minefield.
1.6D 2019 VW T-Cross
200hp VW T6
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5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
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- ajsimmo
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Re: co2 emissions?
I realise including diesel is not a direct comparator, but with all the other nasties in diesel emissions I think we can write that off as the worst overall.937carrera wrote:ajsimmo wrote:Good link, thanks.
I like the bit that shows one way that LPG is better for the environment:
Diesel = 132g CO2/km
Petrol = 120g CO2/km
LPG = 83g CO2/km
That's a massive difference, even allowing for slightly reduced mpg on LPG.
Slightly unfair though because the energy content of the fuels is different, so using the same volume of fuel per distance is not comparing apples with apples
Good find though - he must have had a good mole to find that.
Petrol v LPG is close enough to show LPG a clear winner as least worst.
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- ZsZ
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Re: co2 emissions?
Advanced Google skills937carrera wrote:ajsimmo wrote:Good link, thanks.
I like the bit that shows one way that LPG is better for the environment:
Diesel = 132g CO2/km
Petrol = 120g CO2/km
LPG = 83g CO2/km
That's a massive difference, even allowing for slightly reduced mpg on LPG.
Slightly unfair though because the energy content of the fuels is different, so using the same volume of fuel per distance is not comparing apples with apples
Good find though - he must have had a good mole to find that.
Zoltan
1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
5spd custom box 4.57 diff + 0.74 5th
1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
5spd custom box 4.57 diff + 0.74 5th
- 937carrera
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Re: co2 emissions?
ahhh, my chemistry joke has gone unrecognised
You really can't ignore the energy density though
LPG 25-27 MJ / l
Petrol 34.2 MJ /l
Diesel 38.6 MJ / l
So, assuming the same conversion efficiency you need 48% more LPG and 13% more petrol than diesel to go the same distance
So energy content adjusted petrol becomes 136g / km and LPG becomes 123g / km against 132g / km for diesel.
Next of course in the evaluation is the relative conversion efficiency of the different fuels within their own engine type.
I was never a fan of the dash to diesel, and believe it makes sense to take full advantage of the lighter fractions coming off from refining crude, my comments here are primarily to try and get the engineering maths closer to reality (primarily because the implied assumptions behind the example in the webpage can lead to incorrect interpretation.) Think of this another way...... you LPG users know that one litre of LPG does not go as far as one litre of petrol.
You really can't ignore the energy density though
LPG 25-27 MJ / l
Petrol 34.2 MJ /l
Diesel 38.6 MJ / l
So, assuming the same conversion efficiency you need 48% more LPG and 13% more petrol than diesel to go the same distance
So energy content adjusted petrol becomes 136g / km and LPG becomes 123g / km against 132g / km for diesel.
Next of course in the evaluation is the relative conversion efficiency of the different fuels within their own engine type.
I was never a fan of the dash to diesel, and believe it makes sense to take full advantage of the lighter fractions coming off from refining crude, my comments here are primarily to try and get the engineering maths closer to reality (primarily because the implied assumptions behind the example in the webpage can lead to incorrect interpretation.) Think of this another way...... you LPG users know that one litre of LPG does not go as far as one litre of petrol.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
- ajsimmo
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Re: co2 emissions?
Yes, well, sometimes. In reality, our WBXs very often run better on LPG than on petrol, and similar mpg results are often obtained. This can be because of inherent inefficiencies in the way a petrol carburettor works, and that petrol enters the engine as droplets of liquid compared to LPG entering as a much more readily combustible mix of gas and air. If the metering of LPG is also more accurately matched to demand, the whole process of turning fuel into motion can be markedly more efficient with LPG. That's why we don't often see the large real world differences that your figures would suggest.
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- ajsimmo
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Re: co2 emissions?
No, it hasn't, Adrian (aged 13 3/4).937carrera wrote:ahhh, my chemistry joke has gone unrecognised
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- 937carrera
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Re: co2 emissions?
That's why I referenced relative efficiency, the "cleanness" of the burn is another way of describing this effect.
Which is why although ethanol has a lower energy value than petrol, fuel consumption remains about the same, until you start running at blends in excess of about 10% when the efficiency gains from the oxygenate effect get overtaken by the loss in energy density.
By the time a car is running E85 (as Saab used to with their BioPower models) the increase in volumetric fuel consumption was much closer to the energy density difference.
I know what I know, and I also know that I'm only scratching the surface of the complexities.
Which is why although ethanol has a lower energy value than petrol, fuel consumption remains about the same, until you start running at blends in excess of about 10% when the efficiency gains from the oxygenate effect get overtaken by the loss in energy density.
By the time a car is running E85 (as Saab used to with their BioPower models) the increase in volumetric fuel consumption was much closer to the energy density difference.
I know what I know, and I also know that I'm only scratching the surface of the complexities.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
- 937carrera
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Re: co2 emissions?
ajsimmo wrote:No, it hasn't, Adrian (aged 13 3/4)937carrera wrote:ahhh, my chemistry joke has gone unrecognised
Aww, you made my evening
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine