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Tattooboy
4,926 posts
47 months
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Mine are like it all the time Snowy, it's normal 
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snowwolf
Original Poster
9,023 posts
44 months
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Tattooboy said: Mine are like it all the time Snowy, it's normal How you doing TB been ages since I last see you, soot def worse since SC was tightened down, probably nothing to do with it at all tho.
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Tattooboy
4,926 posts
47 months
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snowwolf said: Tattooboy said: Mine are like it all the time Snowy, it's normal How you doing TB been ages since I last see you, soot def worse since SC was tightened down, probably nothing to do with it at all tho. Good thanks Snowy, hope your doing well? my exhaust tips get soothed up very quickly, nothing a quick wipe with a cloth doesn't cure Always been like it tho pre and post SC.
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ARAF
11,572 posts
92 months
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snowwolf said: Tattooboy said: Mine are like it all the time Snowy, it's normal How you doing TB been ages since I last see you, soot def worse since SC was tightened down, probably nothing to do with it at all tho. If it was mapped with a slight air leak from not being bolted down correctly, and now there is none, then I think that's a very good reason for it to be running richer now. 
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V88Dicky
4,571 posts
52 months
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SturdyHSV said: Considering it pumps out 380+ g/km of CO2, it's no surprise there's some mess deposited on there...
I assume anyway...  If you can kindly connect CO2 to soot I'm all ears!
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richie slow
5,747 posts
33 months
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Mine are only sooty after a trackday or a Thunder Road, so it's only when there are longer periods of WOT. So I guess the PE part of my map is spot on then, thank you MF1 
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SturdyHSV
2,066 posts
36 months
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V88Dicky said: If you can kindly connect CO2 to soot I'm all ears! Fair enough, like I said it was an assumption that the soot was in some way related to carbon, and that if it's producing a lot of CO2, there's a possibility that not all of the freed carbon atoms have bonded with Oxygen. I focused more on maths and physics for a level, so my leftover chemistry knowledge is clearly based on shaky foundations. Could you enlighten me? (sincerely, I'm not being sarcastic) Edit: Having given it some thought, if you're starting with a hydrocarbon, and it's r acting with the oxygen in the air, I presume soot is indicative that there wasn't enough oxygen for all of the petrol to cleanly become just co2 and water vapour?
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V88Dicky
4,571 posts
52 months
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You're spot on there James. Hydrocarbons and CO2 are obviously both products of the combustion process but amounts of each will vary wildly, and more CO2 doesn't neccessarily mean more hydrocarbons (soot). For example, a well tuned petrol engine as a rule will produce more Devil's Gas but (much) less soot than an equivalent diesel. It's a real travesty that we're taxed according to CO2 output and not real pollution, ie soot. 
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SturdyHSV
2,066 posts
36 months
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It's one of those things I've not really thought about (the chemistry side of it), I may go and give it a bit of a read. Whatever we're taxed on, it's just because the motorist is the cause of all pollution, honest. Cows or air travel? Nope, it's all cars. Definitely. 
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V88Dicky
4,571 posts
52 months
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MyM8V8
6,802 posts
64 months
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V88Dicky said: You're spot on there James. It's a real travesty that we're taxed according to CO2 output and not real pollution, ie soot. We are. Diesel is more expensive for those of us running oil burning workhorses.
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V88Dicky
4,571 posts
52 months
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MyM8V8 said: We are. Diesel is more expensive for those of us running oil burning workhorses. Isn't that because diesel costs more to produce though? iirc petroleum comes out of the cracking process before diesel.
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Tattooboy
4,926 posts
47 months
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MyM8V8 said: V88Dicky said: You're spot on there James. It's a real travesty that we're taxed according to CO2 output and not real pollution, ie soot. We are. Diesel is more expensive for those of us running oil burning workhorses. Wasn't diesel cheaper than petrol years ago, then the government cottoned on that it was selling more than petrol and whacked the price up?
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V88Dicky
4,571 posts
52 months
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It certainly was, yes. It's now taxed at the same rate as petrol iirc
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SturdyHSV
2,066 posts
36 months
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V88Dicky said: Isn't that because diesel costs more to produce though?
iirc petroleum comes out of the cracking process before diesel. If it occurred later in the cracking process, I assume that means the chains are smaller, so would you in theory get more diesel for a fixed amount of oil, maybe making it cheaper through increased supply? Although with so much industry using diesel, I suppose demand is a lot higher. Ahhh I don't know
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V88Dicky
4,571 posts
52 months
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It's enough to give you a headache
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altoplanohombre
47 posts
14 months
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It's a case of supply and demand in this country. Too many diesel cars. From every barrel of oil 'cracked' at the refinery there is not enough diesel and kerosene produced to meet demand compared to the petrol produced and demanded. Hence diesel price increases more in the winter when there is an even greater demand for heating oil 
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