Diesels accelerating - big clouds of black smoke- explain??
Discussion
its nothing to do with smoke in the exhaust pipe.
Balck smoke is partially burnt diesel- basically it means the car is chucking a shed load of diesel into the bores, its not all being burnt, and is being chucked out again as soot. The EGT temps will be going through the roof and if you leave it burning like that for long enough it will melt a cylinder.
Can be offset through propane injection, use of a bigger intercooler, water injection or not using the right foot again
Balck smoke is partially burnt diesel- basically it means the car is chucking a shed load of diesel into the bores, its not all being burnt, and is being chucked out again as soot. The EGT temps will be going through the roof and if you leave it burning like that for long enough it will melt a cylinder.
Can be offset through propane injection, use of a bigger intercooler, water injection or not using the right foot again
Munter said:
the_lone_wolf said:
Munter said:
Hence the egr valves.
Thought EGR valves were there to reduce chamber temperatures and therefore Nitrogen Monoxide production???
mini me said:
This is correct. More egr = less nox but more parts. Unfortunately it's a trade off between the two. The main reason why diesels these days are fitted with dpf's to trap the particulates is that due to stage 5 nox limits we have to run much more egr. This makes us fail on parts so we need to use aftertreatment to clean it all up again. To be honest I don't really buy all this diesels run much richer. In fact I do believe it's the opposite there is much more oxygen left in diesel exhaust If it's running right and this is partly why they are more efficient. i.e less fuel is injected for the same amount of air.
They run far richer at WOT as they can handle the fuelling- they run much leaner off WOT because you don't get the attendant heating problem you do with leaning a petrol engine- quite the opposite. Lack of throttle butterflys always helps!paulshears said:
My brothers Caddy pickup didn't chuck out too much smoke when it tuned up from 75 bhp to 116 bhp
Chucks out very little visible smoke now that he runs it on a mix of cooking oil & diesel
My dads van is like that, i hate it because it's needless pollution that bit of maintenace would cure Chucks out very little visible smoke now that he runs it on a mix of cooking oil & diesel
But i get raped for having a high polluting 2.0 hyundai.Diesel is just a dirtier fuel correct?
I like the way they have to put a particulate filter on which lowers mpg which is the sole reason to buy one.
Then it spends all its life at 1500-2000 rpm because its driver is clueless and goes into limp home mode unless you go thrash it on the montor way for an hour, removing most of the mpg benefit.
The government needs to get real, stop the co2 tax bulls
t and start taxing on particulates. Increase diesel fuel to £1.40 a litre for the public and petrol down to 90p.
Maybe a couple of pence extra to remove road tax and that way foreign visitors bringing cars here pay for the tax and a big cut in costs of runing and policing the road tax sysyem. You can't avoid it and you can't forget to pay it. It wont be based on made up emmisions crap it will be based on mpg. So you choice of car and driving style determines how much you pay.
I like the way they have to put a particulate filter on which lowers mpg which is the sole reason to buy one.
Then it spends all its life at 1500-2000 rpm because its driver is clueless and goes into limp home mode unless you go thrash it on the montor way for an hour, removing most of the mpg benefit.
The government needs to get real, stop the co2 tax bulls
t and start taxing on particulates. Increase diesel fuel to £1.40 a litre for the public and petrol down to 90p.Maybe a couple of pence extra to remove road tax and that way foreign visitors bringing cars here pay for the tax and a big cut in costs of runing and policing the road tax sysyem. You can't avoid it and you can't forget to pay it. It wont be based on made up emmisions crap it will be based on mpg. So you choice of car and driving style determines how much you pay.
BlueMR2 said:
Maybe a couple of pence extra to remove road tax and that way foreign visitors bringing cars here pay for the tax and a big cut in costs of runing and policing the road tax sysyem. You can't avoid it and you can't forget to pay it. It wont be based on made up emmisions crap it will be based on mpg. So you choice of car and driving style determines how much you pay.
Think of all the job losses in HMRC and the DVLA though 
Dupont666 said:
so what about the Powerstroke, Cummins and Duramax engines that get tuned to silly horsepower?
Is that too much fuel dumping?
Is there anything that could be done to stop it?
The Americans don't want to stop it... they really like the look of the smoke. They call it 'Rolling Coal' and actually modify their diesel cars and trucks to smoke loads as they think it looks "cool",Is that too much fuel dumping?
Is there anything that could be done to stop it?
A pick up...
http://www.youtube.com/watch?v=U3btk0XGqi0&fea...
and a VW Bora with a 'smoke stack'!
http://www.youtube.com/watch?v=6SNk9_3YMcI
My diesel smokes a bit if i've been driving gently on the motorway for a while, usually stick to 60 as it's a reasonable speed and i find it easier than pushing the overtaking lane. Not a MLM though!
Mine is remapped as well and that can chuck out a bit of smoke when i hit boost, as noticed on a PH run a while ago by the organiser, who knew when i was on boost by the smoke
Mine is remapped as well and that can chuck out a bit of smoke when i hit boost, as noticed on a PH run a while ago by the organiser, who knew when i was on boost by the smoke
NinjaPower said:
Dupont666 said:
so what about the Powerstroke, Cummins and Duramax engines that get tuned to silly horsepower?
Is that too much fuel dumping?
Is there anything that could be done to stop it?
The Americans don't want to stop it... they really like the look of the smoke. They call it 'Rolling Coal' and actually modify their diesel cars and trucks to smoke loads as they think it looks "cool",Is that too much fuel dumping?
Is there anything that could be done to stop it?
A pick up...
http://www.youtube.com/watch?v=U3btk0XGqi0&fea...
and a VW Bora with a 'smoke stack'!
http://www.youtube.com/watch?v=6SNk9_3YMcI
BlueMR2 said:
Diesel is just a dirtier fuel correct?
I like the way they have to put a particulate filter on which lowers mpg which is the sole reason to buy one.
Then it spends all its life at 1500-2000 rpm because its driver is clueless and goes into limp home mode unless you go thrash it on the montor way for an hour, removing most of the mpg benefit.
The government needs to get real, stop the co2 tax bullst and start taxing on particulates. Increase diesel fuel to £1.40 a litre for the public and petrol down to 90p.
Maybe a couple of pence extra to remove road tax and that way foreign visitors bringing cars here pay for the tax and a big cut in costs of runing and policing the road tax sysyem. You can't avoid it and you can't forget to pay it. It wont be based on made up emmisions crap it will be based on mpg. So you choice of car and driving style determines how much you pay.
i think you might have things completely the wrong way round.I like the way they have to put a particulate filter on which lowers mpg which is the sole reason to buy one.
Then it spends all its life at 1500-2000 rpm because its driver is clueless and goes into limp home mode unless you go thrash it on the montor way for an hour, removing most of the mpg benefit.
The government needs to get real, stop the co2 tax bulls
t and start taxing on particulates. Increase diesel fuel to £1.40 a litre for the public and petrol down to 90p.Maybe a couple of pence extra to remove road tax and that way foreign visitors bringing cars here pay for the tax and a big cut in costs of runing and policing the road tax sysyem. You can't avoid it and you can't forget to pay it. It wont be based on made up emmisions crap it will be based on mpg. So you choice of car and driving style determines how much you pay.
Numerically, petrols produce more particulates, which are smaller and lighter and barely visible, but which remain airborne for longer, penetrate the lungs more deeply and are more injurious to health.
Diesels produce heavier and larger particulates, which fall to ground far more quickly and then gets washed down the drains.
Petrol also requires highly carcinogenic substances added to ensure proper combustion. before the carcinogens were used lead used to be added, also highly injurious to health.
When you consider that the use of petrol requires more fuel to produce snd be delivered which means more use of lorries, and that petrols are highly polluting when cold, i think it still remains the case that petrol engines are vastly more dirty than diesels. But they have closed the gap, i'll agree.
Many people automatically think that pollution that can be seen must be worse than pollution that can't be seen, but that's not the case.
The Passat used to smoke a lot, when I picked it up I booted it off a roundabout, looked in the rear view and left door mirror, and there was a massive plume of black smoke. Now it's had an 'Italian tune-up' (as someone else mentioned), it is a lot better. Still a small puff on hard acceleration though.
Rob_F said:
NinjaPower said:
Dupont666 said:
so what about the Powerstroke, Cummins and Duramax engines that get tuned to silly horsepower?
Is that too much fuel dumping?
Is there anything that could be done to stop it?
The Americans don't want to stop it... they really like the look of the smoke. They call it 'Rolling Coal' and actually modify their diesel cars and trucks to smoke loads as they think it looks "cool",Is that too much fuel dumping?
Is there anything that could be done to stop it?
A pick up...
http://www.youtube.com/watch?v=U3btk0XGqi0&fea...
and a VW Bora with a 'smoke stack'!
http://www.youtube.com/watch?v=6SNk9_3YMcI
t, i never knew they did it on purpose. Diesels cleaner my arse, i love cars but that should'nt be allowed What i don't get is why people have such an issue with 2 stroke engines when there are things like that on the road.
Edited by Ninjaboy on Thursday 2nd September 21:12
Rob_F said:
NinjaPower said:
Dupont666 said:
so what about the Powerstroke, Cummins and Duramax engines that get tuned to silly horsepower?
Is that too much fuel dumping?
Is there anything that could be done to stop it?
The Americans don't want to stop it... they really like the look of the smoke. They call it 'Rolling Coal' and actually modify their diesel cars and trucks to smoke loads as they think it looks "cool",Is that too much fuel dumping?
Is there anything that could be done to stop it?
A pick up...
http://www.youtube.com/watch?v=U3btk0XGqi0&fea...
and a VW Bora with a 'smoke stack'!
http://www.youtube.com/watch?v=6SNk9_3YMcI
Has to point this out for the sake of blood pressure at the usually lower level intelligence than normal on this thread. Not just aimed at this poster but many others too.
Just that the particulates they produce are smaller and thus less visible to the naked eye.
It's because of a carefully selected particulate size that diesels show higher particulate production, if a different size were selected the results would be different. In other words the particulates produced by petrol engines are too small to be caught by the measurement process. Doesn't mean that they aren't there or that by weight they may be more.
eg people say gas engines LPG/CNG produce no particulates. Well true they are low but again it comes down to particulate size, measurement technique bla bla bla.
take tax off CO2, agreed
Tax fuel on particulates, be on your way numpty.
oops: didn't get down to heebeegeetee's post which pointed out the same thing a different way.
BlueMR2 said:
start taxing on particulates. Increase diesel fuel to £1.40 a litre for the public and petrol down to 90p.
You DO all realise that petrols also produce particulates don't you?Just that the particulates they produce are smaller and thus less visible to the naked eye.
It's because of a carefully selected particulate size that diesels show higher particulate production, if a different size were selected the results would be different. In other words the particulates produced by petrol engines are too small to be caught by the measurement process. Doesn't mean that they aren't there or that by weight they may be more.
eg people say gas engines LPG/CNG produce no particulates. Well true they are low but again it comes down to particulate size, measurement technique bla bla bla.
take tax off CO2, agreed
Tax fuel on particulates, be on your way numpty.
oops: didn't get down to heebeegeetee's post which pointed out the same thing a different way.
Edited by F i F on Friday 3rd September 09:11
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