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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#41
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Petrol in Diesel Engine
"John Rumm" wrote in message ... IMM wrote: And that's why they are good for tractors, and nothing else. Damn - this is worrying - I suddenly find myself in full agreement with IMM... What shall I do? ;-) Look to the heaven as you are now enlightened. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 05/08/2003 |
#42
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Petrol in Diesel Engine
Huge wrote:
Grunff writes: Huge wrote: Immediately obvious you don't know what you're talking about; Clarkson loathes diesels. And I agree with him. Filthy, noisy things. I could never figure out how the government could justify on the one hand requiring incearsingly tougher emissions standards for petrols, and on the other encouraging the use of diesel. Diesel engines are inherently dirty - ever sat behind a brand new diesel being floored? Big cloud of black smoke. My feeling exactly. I agree. They get better after being run in a bit, BUT they all need some form of exhaust treatment. I have noticed - because I don't do it often, that If I tackle the M25 in teh daytime, I end up with a headache, and asthma and a post nasal drip and a raw throat and a cough. I have tackled it on e.g. Sunday afternoons, with as much traffic, but mainly private cars, and not had the same result. I drive a diesel, and its street legal, but I would prefer it to have some form of exhaust treatment. I have seen busses equipped with such and they don't spew out anything and don't smell. I think legislation to remove unburnt fuel and particulates from diesels is long overdue. On another point, I ish all car ventilation systems were equipped with pollen and dust fliters to, now that airconditioning has reduced the need to open windows in summer. |
#43
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Petrol in Diesel Engine
Grunff wrote in message ...
Yes, and all knives should be sold with corks on the ends. A spigot that denotes diesel and sends a sensor deeper into its tank would be ideal as most new diesel owners insist on overfilling their tanks until the penny drops. A diesel works on pre-ignition and relies on the fact that the fuel is not of a high flashpoint. This allows a pressure of 25 to 1 to be utilised and is the reason for their efficiency. Petrol engines used to run at 10 to 1 using 4 and 5 "star" but these days their compression ratios are in the range of 6 to 7 or to 1. Petrol will pre-ignite in the cylinder of a diesel long before the piston is near Tdc. The resulting pressure will crack a cylinder-head. In the good old days (and even now if the engine temperature is low enough) the problem was minimal enough in winter to allow petrol or preferably paraffin to be used as a solvent. But nasty things can happen and be very expensive. A diesel requires as much maintenance as a petrol machine but can run forever without it as it is not running a caustic fuel. The reason for pollution from a diesel is lack of maintenance not poor design. If you see a diesel belching smoke, inform the driver and if you see it doing so again, inform the police, there is a phone number for such reports; I believe it goes to your local council. It is an offence under the clean air act to pollute the atmosphere with a badly maintained engine of any sort. That's what the MoT emissions test is set up for. |
#44
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Petrol in Diesel Engine
Michael McNeil wrote:
A diesel requires as much maintenance as a petrol machine but can run forever without it as it is not running a caustic fuel. I've never heard the term 'caustic' used in relation to organic solvents before - what exactly do you mean? The reason for pollution from a diesel is lack of maintenance not poor design. If you see a diesel belching smoke, inform the driver and if you see it doing so again, inform the police, there is a phone number for such reports; I believe it goes to your local council. That would involve stopping just about every diesel driver on the road, including those in brand new diesel BMWs (supposedly one of the most refined diesel engines around). It is an offence under the clean air act to pollute the atmosphere with a badly maintained engine of any sort. That's what the MoT emissions test is set up for. It isn't about them being badly maintained - diesel engines will all (ok I haven't tested them all, but the vast majority at any rate) beltch out black smoke *under high load*. Do you actually have any real life experience of diesel engines?? -- Grunff |
#45
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Petrol in Diesel Engine
Michael McNeil wrote:
Grunff wrote in message ... STOPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!! ....typing in uppercase, noone will read it. PETROL IN A DIESEL WILL WARP THE HEAD IF NOT BLOW THE THING AWAY ESPECIALLY SUCH A STRONG MIX. Not at 10% it won't. TAKE THE FUEL LINE OFF AND PUMP IT OUT WITH THE ELECTRIC PUMP OR BUY ANOTHER ELECTRIC FUEL PUMP FOR SUCH EMERGENCIES FROM A SCRAP YARD. DRAIN INTO A DRUM AND GIVE IT TO A TREE SURGEON OR SOMEONE WITH A TWO STROKE MOTOR. Only if you're of a very nervous disposition, and have little understanding of chemistry and IC engines. -- Grunff |
#46
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Petrol in Diesel Engine
"The Natural Philosopher" wrote in message ... Huge wrote: Grunff writes: Huge wrote: Immediately obvious you don't know what you're talking about; Clarkson loathes diesels. And I agree with him. Filthy, noisy things. I could never figure out how the government could justify on the one hand requiring incearsingly tougher emissions standards for petrols, and on the other encouraging the use of diesel. Diesel engines are inherently dirty - ever sat behind a brand new diesel being floored? Big cloud of black smoke. My feeling exactly. I agree. They get better after being run in a bit, BUT they all need some form of exhaust treatment. I have noticed - because I don't do it often, that If I tackle the M25 in teh daytime, I end up with a headache, and asthma and a post nasal drip and a raw throat and a cough. That conforms my assumption. You are a basket case. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#47
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Petrol in Diesel Engine
"Michael McNeil" wrote in message om... Grunff wrote in message ... Yes, and all knives should be sold with corks on the ends. A spigot that denotes diesel and sends a sensor deeper into its tank would be ideal as most new diesel owners insist on overfilling their tanks until the penny drops. A diesel works on pre-ignition and relies on the fact that the fuel is not of a high flashpoint. This allows a pressure of 25 to 1 to be utilised and is the reason for their efficiency. Efficiency? A mute word here. A diesel returns higher mileage because a litre of diesel has a higher CV than petrol, no other reason. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#48
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Petrol in Diesel Engine
IMM wrote:
I agree. They get better after being run in a bit, BUT they all need some form of exhaust treatment. I have noticed - because I don't do it often, that If I tackle the M25 in teh daytime, I end up with a headache, and asthma and a post nasal drip and a raw throat and a cough. That conforms my assumption. You are a basket case. [English lessons for IMM. 1:] "confirms" would make sense in this sentence, but "conforms" doesn't. -- Grunff |
#49
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Petrol in Diesel Engine
IMM wrote:
Efficiency? A mute word here. A diesel returns higher mileage because a litre of diesel has a higher CV than petrol, no other reason. [English lessons for IMM. 2:] "mute" doesn't work here at all - it just makes no sense. The word I think you're looking for is "moot". -- Grunff |
#50
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Petrol in Diesel Engine
On Sun, 17 Aug 2003 10:07:54 UTC, "IMM" wrote:
That conforms my assumption. You are a basket case. Illogical, not to mention the wrong word. 'conforms'? -- Bob Eager rde at tavi.co.uk PC Server 325*4; PS/2s 9585, 8595, 9595*2, 8580*3, P70, PC/AT.. |
#51
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Petrol in Diesel Engine
"Grunff" wrote in message ... IMM wrote: I agree. They get better after being run in a bit, BUT they all need some form of exhaust treatment. I have noticed - because I don't do it often, that If I tackle the M25 in teh daytime, I end up with a headache, and asthma and a post nasal drip and a raw throat and a cough. That conforms my assumption. You are a basket case. [English lessons for IMM. 1:] "confirms" would make sense in this sentence, but "conforms" doesn't. How do you know? --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#52
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Petrol in Diesel Engine
"Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#53
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Petrol in Diesel Engine
Chris Hodges wrote:
If you floor a diesel (esp turbo) you get black smoke initally, then it normally clears. That's visible. Petrol cars chuck out NOx, which you can't see, but isn't much better from the point of view of pollution. Basically there's not a lot in it, and anything pollutes more if you floor it. Ehem... [1] NOx are to a very large extent broken down by the cat. Modern cars (are required to) have extrremely low NOx emissions. [2] At the concentrations we're talking about, NOx have very little *direct* effect on human health. They do, however contribute to smog. [3] OTOH, the particulates which make up the black smoke are a known carcinogen, and pose a direct health threat. They are tiny carbon particles with a rich cocktail of hydrocarbons adsorbed onto them. -- Grunff |
#54
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Petrol in Diesel Engine
On Sun, 17 Aug 2003 12:22:41 UTC, "IMM" wrote:
"Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. Oh dear. A spell checker would be unlikely to help you. You could start with a grammar checker, though. -- Bob Eager rde at tavi.co.uk PC Server 325*4; PS/2s 9585, 8595, 9595*2, 8580*3, P70, PC/AT.. |
#55
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Petrol in Diesel Engine
On Sat, 16 Aug 2003 08:58:45 +0100, "harrogate"
wrote: "Doctor D." wrote in message ... They will mix just fine, and it will have no adverse effects on your car (it's a diesel, how much worse can it get anyway??). I thought this too until I actually tried one. Take a Golf 130 TDi, Megane 120 DCi or Focus 115 TDCi for a spin and eat your words! I can never understand why the (so-called) motoring journalists of this world - Clarkson and all that lot - always promote the idea that running a diesel is all about thrift and low fuel consumption. Anyone who regularly drives a diesel will tell you this is far from the case - it's all about laziness, not have to change gear to accelerate, not having to change gear to go around corners, being able to pull away easily on ice or snow when the petrolheads are spinning their wheels like crazy................... and so it goes on. Diesel is all about torque at low revs and flexibility - provided you don't want to do it in microseconds! Having had diesel company cars for the last decade I find it difficult to go back to driving a petrol car again - I keep having to work pedals and move the gear lever. It's only because of our stupid taxation system that puts the cost of diesel so high over here that stops diesel cars selling more - you only have to go across the channel to see the truth of that!. Well any diesel I have driven, including BMW's finest., all felt like they had to be rowed along on the gearbox. The low end torque that is talked about never manifested itself in my presence. What I really don't understand is why peoplr who buy diesel engined cars then procedd to drive the sh-one-t out of them. What are they trying to prove ? And as for reliability. Diesel engines in boats were ultra-reliable until they started fitting turbo-chargers and letting them rev higher. Reliability went out the window, and if you really need an emetic try reading a repair estimate for a turbo charged Volvo diesel boat engine. Paul Mc Cann |
#56
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Petrol in Diesel Engine
"Grunff" wrote in message
... Chris Hodges wrote: If you floor a diesel (esp turbo) you get black smoke initally, then it normally clears. That's visible. Petrol cars chuck out NOx, which you can't see, but isn't much better from the point of view of pollution. Basically there's not a lot in it, and anything pollutes more if you floor it. Ehem... [1] NOx are to a very large extent broken down by the cat. Modern cars (are required to) have extrremely low NOx emissions. [2] At the concentrations we're talking about, NOx have very little *direct* effect on human health. They do, however contribute to smog. [3] OTOH, the particulates which make up the black smoke are a known carcinogen, and pose a direct health threat. They are tiny carbon particles with a rich cocktail of hydrocarbons adsorbed onto them. -- Grunff out of curiosity, where do bio-diesel and ethanol stand on the scale of noxious emmissions? (I mean pure bio-diesel, not fossil fuel mixed with 5% or 10% bio stuff). What's the downside to them? cheers Richard -- Richard Sampson email me at richard at olifant d-ot co do-t uk |
#57
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Petrol in Diesel Engine
In message , IMM
writes "Michael McNeil" wrote in message . com... Grunff wrote in message Efficiency? A mute word here. A diesel returns higher mileage because a litre of diesel has a higher CV than petrol, no other reason. No. Diesel engines are more efficient for two reasons: 1) Higher compression ratio & higher cylinder pressures are thermodynamically more efficient. 2) Lower "pumping losses" at part load, i.e. a petrol engine spends most of its life gasping to draw in air against a partial vacuum due to the restricted (throttled) inlet. A diesel has free flow air inlet (ignoring turbos & EGR for simplicity). -- Steve |
#58
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Petrol in Diesel Engine
"Bob Eager" wrote in message ... On Sun, 17 Aug 2003 12:22:41 UTC, "IMM" wrote: "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. Oh dear. A spell checker would be unlikely to help you. How do you know? --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#59
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Petrol in Diesel Engine
On Sun, 17 Aug 2003 19:10:33 +0100, Paul Mc Cann
wrote: Well any diesel I have driven, including BMW's finest., all felt like they had to be rowed along on the gearbox. The low end torque that is talked about never manifested itself in my presence. I drive a diesel Freelander which is really a tractor with a bit of fancy bodywork bolted on A few weeks back I got to hire a Mondeo TDCi for a couple of days whilst my Freelander was in for servicing. I didn't check what was under the bonnet of the TDCi, but the thing went like lightning (comparitively to the Freelander) when I hoofed it. I thought "hell, these petrol engines sure put the diesel to shame!". When I got home I got the user manual out. This thing I was giving credit to was a 2L diesel. Went like a steam train on steroids when you put the hammer down, plenty of grunt and really smooth. The new TD4 Freelander is a lot better as well. Andrew Do you need a handyman service? Check out our web site at http://www.handymac.co.uk |
#60
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Petrol in Diesel Engine
In message , Grunff
writes Michael McNeil wrote: A diesel requires as much maintenance as a petrol machine but can run forever without it as it is not running a caustic fuel. I've never heard the term 'caustic' used in relation to organic solvents before - what exactly do you mean? The reason for pollution from a diesel is lack of maintenance not poor design. If you see a diesel belching smoke, inform the driver and if you see it doing so again, inform the police, there is a phone number for such reports; I believe it goes to your local council. That would involve stopping just about every diesel driver on the road, including those in brand new diesel BMWs (supposedly one of the most refined diesel engines around). It is an offence under the clean air act to pollute the atmosphere with a badly maintained engine of any sort. That's what the MoT emissions test is set up for. It isn't about them being badly maintained - diesel engines will all (ok I haven't tested them all, but the vast majority at any rate) beltch out black smoke *under high load*. I don't agree. It happens that YOU notice the small proportion of diesels that are smoky, but the reality is they are quite rare now. At full power the exhaust should be no more than very slightly coloured, certainly no were near "belch out black smoke". Open your eyes, look at some of the lorries as you pass them on the motorway. All you'll see from the majority is heat-haze from the exhaust. -- Steve |
#61
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Petrol in Diesel Engine
On Sun, 17 Aug 2003 20:56:42 UTC, "IMM" wrote:
"Bob Eager" wrote in message ... On Sun, 17 Aug 2003 12:22:41 UTC, "IMM" wrote: "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. Oh dear. A spell checker would be unlikely to help you. How do you know? Because you have replaced the correct word with another (correctly spelled) word. A spell checker can't fix that. -- Bob Eager rde at tavi.co.uk PC Server 325*4; PS/2s 9585, 8595, 9595*2, 8580*3, P70, PC/AT.. |
#62
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Petrol in Diesel Engine
In message , IMM
writes "Grunff" wrote in message ... IMM wrote: I agree. They get better after being run in a bit, BUT they all need some form of exhaust treatment. I have noticed - because I don't do it often, that If I tackle the M25 in teh daytime, I end up with a headache, and asthma and a post nasal drip and a raw throat and a cough. That conforms my assumption. You are a basket case. [English lessons for IMM. 1:] "confirms" would make sense in this sentence, but "conforms" doesn't. How do you know? You can't conform something, you can, however conform TO or WITH something -- geoff |
#63
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Petrol in Diesel Engine
On Sun, 17 Aug 2003 22:08:02 +0100, "IMM" wrote:
I find that when you start to accelerate and drive quick in turbo diesels the fuel consumption rockets, far more than the equiv petrol This is a well known characteristic of the plumbers favourite Transit Van. -- Peter Parry. http://www.wpp.ltd.uk/ |
#64
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Petrol in Diesel Engine
"Bob Eager" wrote in message ... On Sun, 17 Aug 2003 20:56:42 UTC, "IMM" wrote: "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 12:22:41 UTC, "IMM" wrote: "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. Oh dear. A spell checker would be unlikely to help you. How do you know? Because you have replaced the correct word with another (correctly spelled) word. A spell checker can't fix that. How do you know? --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#65
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Petrol in Diesel Engine
"Andrew McKay" wrote in message ... On Sun, 17 Aug 2003 19:10:33 +0100, Paul Mc Cann wrote: Well any diesel I have driven, including BMW's finest., all felt like they had to be rowed along on the gearbox. The low end torque that is talked about never manifested itself in my presence. I drive a diesel Freelander which is really a tractor with a bit of fancy bodywork bolted on Sad I know. An automotive engineer neighbour had one and sent it back as it was naff and broke down a lot. A few weeks back I got to hire a Mondeo TDCi for a couple of days whilst my Freelander was in for servicing. I didn't check what was under the bonnet of the TDCi, but the thing went like lightning (comparitively to the Freelander) when I hoofed it. I thought "hell, these petrol engines sure put the diesel to shame!". When I got home I got the user manual out. This thing I was giving credit to was a 2L diesel. Went like a steam train on steroids when you put the hammer down, plenty of grunt and really smooth. You shold have drove the pretrol one then. The new TD4 Freelander is a lot better as well. It can't get any worse can it? --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#66
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Petrol in Diesel Engine
In message , IMM
writes "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. How so exactly ? - a spell checker would recognise both "mute" and "moot" -- geoff |
#67
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Petrol in Diesel Engine
In message , IMM
writes "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 12:22:41 UTC, "IMM" wrote: "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. Oh dear. A spell checker would be unlikely to help you. How do you know? You're beyond help, that's why -- geoff |
#68
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Petrol in Diesel Engine
In message , IMM
writes When I got home I got the user manual out. This thing I was giving credit to was a 2L diesel. Went like a steam train on steroids when you put the hammer down, plenty of grunt and really smooth. You shold have drove the pretrol one then. The new TD4 Freelander is a lot better as well. It can't get any worse can it? No, it doesn't seem so, grammar and spelling both in the same sentence -- geoff |
#69
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Petrol in Diesel Engine
"geoff" wrote in message ... In message , IMM writes "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. How so exactly ? - a spell checker would recognise both "mute" and "moot" The original word was misspelt. Duh!! --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 05/08/2003 |
#70
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Petrol in Diesel Engine
"geoff" wrote in message ... In message , IMM writes When I got home I got the user manual out. This thing I was giving credit to was a 2L diesel. Went like a steam train on steroids when you put the hammer down, plenty of grunt and really smooth. You shold have drove the pretrol one then. The new TD4 Freelander is a lot better as well. It can't get any worse can it? No, it doesn't seem so, grammar and spelling both in the same sentence Perfect guv, perfect. Yer actual estuary Inglish. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 05/08/2003 |
#71
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Petrol in Diesel Engine
In message , IMM
writes "geoff" wrote in message ... In message , IMM writes When I got home I got the user manual out. This thing I was giving credit to was a 2L diesel. Went like a steam train on steroids when you put the hammer down, plenty of grunt and really smooth. You shold have drove the pretrol one then. The new TD4 Freelander is a lot better as well. It can't get any worse can it? No, it doesn't seem so, grammar and spelling both in the same sentence Perfect guv, perfect. Yer actual estuary Inglish. Learn some - you need to -- geoff |
#72
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Petrol in Diesel Engine
In message , IMM
writes "geoff" wrote in message ... In message , IMM writes "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. How so exactly ? - a spell checker would recognise both "mute" and "moot" The original word was misspelt. Duh!! Your point being ? How can you blame the spell checker? The word had a spelling which the spell checker recognised You can't blame it for your incompetence -- geoff |
#73
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Petrol in Diesel Engine
On Sun, 17 Aug 2003 22:08:02 +0100, "IMM" wrote:
I find that when you start to accelerate and drive quick in turbo diesels the fuel consumption rockets, far more than the equiv petrol Of course it does. There's only so much extra energy in the fuel, and only so much extra thermal efficiency in the engine. Beyond that, more power = more fuel = poorer fuel consumption. People see figures such as 150bhp, 250lb/ft and 50mpg, and think they can all be achieved at the same time. Yeah right. (Not saying it's a bad thing that one engine can achieve all three, however.) -- John |
#74
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Petrol in Diesel Engine
"geoff" wrote in message ... In message , IMM writes "geoff" wrote in message ... In message , IMM writes When I got home I got the user manual out. This thing I was giving credit to was a 2L diesel. Went like a steam train on steroids when you put the hammer down, plenty of grunt and really smooth. You shold have drove the pretrol one then. The new TD4 Freelander is a lot better as well. It can't get any worse can it? No, it doesn't seem so, grammar and spelling both in the same sentence Perfect guv, perfect. Yer actual estuary Inglish. Learn some - you need to Wiv aught me barra, me auld cock sparra. How is that for starters guv? --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#75
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Petrol in Diesel Engine
"geoff" wrote in message ... In message , IMM writes "geoff" wrote in message ... In message , IMM writes "Bob Eager" wrote in message ... On Sun, 17 Aug 2003 10:10:43 UTC, "IMM" wrote: Efficiency? A mute word here. But unfortunately you are not mute. (Hint: the word is 'moot') I know; spell checker. How so exactly ? - a spell checker would recognise both "mute" and "moot" The original word was misspelt. Duh!! Your point being ? How can you blame the spell checker? The word had a spelling which the spell checker recognised Maxie, you still haven't got it. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
#76
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OT - alternative fuels...
Steve Firth wrote:
While it's true that you get about 30kJ/gram from ethanol as opposed to 50kJ/gram from octane (don't have a figure for petrol, but it will be close), the discrepancy isn't so great as to make ethanol unattractive as a road fuel. Yes, you're looking at the wrong figure. With ethanol you need to consider the total energy input to produce the ethanol, not just the calorific value of ethanol itself. There's the biomass itself, then the energy input required to distill the ethanol. Compared to biodiesel (which can be cold-pressed) there's a huge energy input. Good point - but given the difference in cleanliness of the output, ethanol still wins as a city fuel, no? -- Grunff |
#77
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OT - alternative fuels...
"Grunff" wrote in message
... Steve Firth wrote: While it's true that you get about 30kJ/gram from ethanol as opposed to 50kJ/gram from octane (don't have a figure for petrol, but it will be close), the discrepancy isn't so great as to make ethanol unattractive as a road fuel. Yes, you're looking at the wrong figure. With ethanol you need to consider the total energy input to produce the ethanol, not just the calorific value of ethanol itself. There's the biomass itself, then the energy input required to distill the ethanol. Compared to biodiesel (which can be cold-pressed) there's a huge energy input. Good point - but given the difference in cleanliness of the output, ethanol still wins as a city fuel, no? -- Grunff I have to wonder about the emissions benefits of ethanol, though. A scotsman of my acquaintance, one of my co-directors, has run himself on this fuel for quite some time (he's originally from Fraserburgh - apparently it's the personal fuel of choice there). The emissions can be pretty terrible..... cheers Richard -- Richard Sampson email me at richard at olifant d-ot co do-t uk |
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Petrol in Diesel Engine
On Mon, 18 Aug 2003 12:31:31 +0100, "IMM" wrote:
Perfect guv, perfect. Yer actual estuary Inglish. That I can believe..... Of course you can. You are from Sarf Landan. Nope. ..andy To email, substitute .nospam with .gl |
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Petrol in Diesel Engine
IMM wrote:
"Michael McNeil" wrote in message om... Grunff wrote in message ... Yes, and all knives should be sold with corks on the ends. A spigot that denotes diesel and sends a sensor deeper into its tank would be ideal as most new diesel owners insist on overfilling their tanks until the penny drops. A diesel works on pre-ignition and relies on the fact that the fuel is not of a high flashpoint. This allows a pressure of 25 to 1 to be utilised and is the reason for their efficiency. Efficiency? A mute word here. A diesel returns higher mileage because a litre of diesel has a higher CV than petrol, no other reason. No, not so. Try reading a few engineering texts on Otto cycle theoretical efficiencies etc. Higher compression ratios and higher gas pressures equate to higher efficiency, --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003 |
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Petrol in Diesel Engine
Paul Mc Cann wrote:
On Sat, 16 Aug 2003 08:58:45 +0100, "harrogate" wrote: "Doctor D." wrote in message ... They will mix just fine, and it will have no adverse effects on your car (it's a diesel, how much worse can it get anyway??). I thought this too until I actually tried one. Take a Golf 130 TDi, Megane 120 DCi or Focus 115 TDCi for a spin and eat your words! I can never understand why the (so-called) motoring journalists of this world - Clarkson and all that lot - always promote the idea that running a diesel is all about thrift and low fuel consumption. Anyone who regularly drives a diesel will tell you this is far from the case - it's all about laziness, not have to change gear to accelerate, not having to change gear to go around corners, being able to pull away easily on ice or snow when the petrolheads are spinning their wheels like crazy................... and so it goes on. Diesel is all about torque at low revs and flexibility - provided you don't want to do it in microseconds! Having had diesel company cars for the last decade I find it difficult to go back to driving a petrol car again - I keep having to work pedals and move the gear lever. It's only because of our stupid taxation system that puts the cost of diesel so high over here that stops diesel cars selling more - you only have to go across the channel to see the truth of that!. Well any diesel I have driven, including BMW's finest., all felt like they had to be rowed along on the gearbox. The low end torque that is talked about never manifested itself in my presence. Hmm. You may not have driven the right ones. What I really don't understand is why peoplr who buy diesel engined cars then procedd to drive the sh-one-t out of them. What are they trying to prove ? Just trying to get to work on time as fast and as cheap as possible. And as for reliability. Diesel engines in boats were ultra-reliable until they started fitting turbo-chargers and letting them rev higher. Reliability went out the window, and if you really need an emetic try reading a repair estimate for a turbo charged Volvo diesel boat engine. Mmm. I have a turbo diesel, and the engine itself is super reliable. You need to DESIGN for a turbo, you can't just strap one oin and hope. I drove a Mondeo TD some time back. Pretty good car really, although the power band was a tad narrow. Changing down didn't net you extra power like a petrol: Concversely you could pull in quite high gears rather well, as long as you were over the turbo kick in level. Paul Mc Cann |
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