Things you always wanted to know the answer to [Vol. 4]
Discussion
RizzoTheRat said:
Probably the same reasons that VW dropped the Pump Duse engines and started doing Common Rail instead.
The CR is generally quieter and a slightly better fuel economy than the PD.
I'd guess the CR is better on emissions as they can control the injection timing, allowing you to completely change the engines operation when it's being tested for emissions which I doubt you can do on a PD
Well.... depends how you measure it The CR is generally quieter and a slightly better fuel economy than the PD.
I'd guess the CR is better on emissions as they can control the injection timing, allowing you to completely change the engines operation when it's being tested for emissions which I doubt you can do on a PD
Anyway, PD engines were almost universally loathed by anyone who owned one more than 5 years old back in the day as I recall. They were from the generation of TDis that liked to fill DPF, clog ERGs, s
t Injectors and generally send soot pouring out at every opportunity, add to the fact they were also from the era of the £1000+ clutch swap because of the new fangled DMFs and lots of people started to wonder if everyone jumping to Diesel was a good idea. VW CR engines were better in almost every respect, bar the whole cheating on emissions tests thing, the later AdBlue versions are pretty good (although Bristol doesn't seem to agree).
RizzoTheRat said:
Why is Truffle Philadelphia cheese only a "Limited Edition"? It tastes so good why wouldn't they make it part of their standard range?
Either because the stuff that gives it its flavour is limited in its supply and thus genuine limited edition. Or...They're testing the waters before committing to adding it to their range (which would require new production lines, investment, etc. Or
A commercial 'ploy' to charge a premium for something.
Most likely, the second one.
RizzoTheRat said:
I'd guess the CR is better on emissions as they can control the injection timing, allowing you to completely change the engines operation when it's being tested for emissions which I doubt you can do on a PD
It basically comes down to this - better injection control so lower (or cheating) emissions, lower noise, smoother power delivery. Having the highest specific output doesn't sell half as many cars as a smooth engine.Flibble said:
RizzoTheRat said:
I'd guess the CR is better on emissions as they can control the injection timing, allowing you to completely change the engines operation when it's being tested for emissions which I doubt you can do on a PD
It basically comes down to this - better injection control so lower (or cheating) emissions, lower noise, smoother power delivery. Having the highest specific output doesn't sell half as many cars as Clockwork Cupcake said:
No. Relativity is a bit odd like that.
For example, if you are travelling at lightspeed and turn your headlights on, the light from your headlights will leave you at the speed of light. The rules we are used to in normality don't apply and it feels counter-intuitive. And Quantum Physics is even more crazy.
I did degree level Physics and it still bent my mind.
When I am driving (or flying) at the speed of sound, I believe no noise escapes from the front and no-one can hear me coming.For example, if you are travelling at lightspeed and turn your headlights on, the light from your headlights will leave you at the speed of light. The rules we are used to in normality don't apply and it feels counter-intuitive. And Quantum Physics is even more crazy.
I did degree level Physics and it still bent my mind.
If so, how then can light escape from the front when I am flying at the speed of light?
Cliftonite said:
When I am driving (or flying) at the speed of sound, I believe no noise escapes from the front and no-one can hear me coming.
If so, how then can light escape from the front when I am flying at the speed of light?
Because you never quite reach the speed of light.If so, how then can light escape from the front when I am flying at the speed of light?
To an external observer the light is travelling at its normal velocity with you going just a little slower.
To you, thanks to time dilation, it appears that the beam of light travels away from you at the speed of light
Tyre Smoke said:
Why are surgeons known as Mr when your GP or the person you see before them is a Dr? Surely Dr is a 'higher' grade of title than Mr?
I'm not at all sure, but maybe something to do with surgeons in the distant past being regarded as mere 'sawbones' and not as refined, clever, or respectable as doctors?Cliftonite said:
When I am driving (or flying) at the speed of sound, I believe no noise escapes from the front and no-one can hear me coming.
If so, how then can light escape from the front when I am flying at the speed of light?
Because Relativity. As I said earlier, the normal rules don't apply and trying to think of it in common sense terms is invalid. If so, how then can light escape from the front when I am flying at the speed of light?
The speed of light in a vacuum is an absolute, therefore if you turn on your headlights at near the speed of light, the light *has* to escape at the speed of light.
Yes, I know, it messes with your head.
SpeckledJim said:
Tyre Smoke said:
Why are surgeons known as Mr when your GP or the person you see before them is a Dr? Surely Dr is a 'higher' grade of title than Mr?
I'm not at all sure, but maybe something to do with surgeons in the distant past being regarded as mere 'sawbones' and not as refined, clever, or respectable as doctors?Crazy, eh?
"Come in, take a seat. This is Billy. It's his first day. He'll be removing your appendix. I'll be right next door feeding the leeches if he needs anything..."
Clockwork Cupcake said:
Tyre Smoke said:
Why are surgeons known as Mr when your GP or the person you see before them is a Dr? Surely Dr is a 'higher' grade of title than Mr?
Try calling a surgeon "doctor" and see if they take it as a compliment. (Hint: They won't, and most will get quite shirty)
P-Jay said:
Well.... depends how you measure it
Anyway, PD engines were almost universally loathed by anyone who owned one more than 5 years old back in the day as I recall. They were from the generation of TDis that liked to fill DPF, clog ERGs, st Injectors and generally send soot pouring out at every opportunity, add to the fact they were also from the era of the £1000+ clutch swap because of the new fangled DMFs and lots of people started to wonder if everyone jumping to Diesel was a good idea.
VW CR engines were better in almost every respect, bar the whole cheating on emissions tests thing, the later AdBlue versions are pretty good (although Bristol doesn't seem to agree).
You need to go older than that, late PD was a bag of sAnyway, PD engines were almost universally loathed by anyone who owned one more than 5 years old back in the day as I recall. They were from the generation of TDis that liked to fill DPF, clog ERGs, s
t Injectors and generally send soot pouring out at every opportunity, add to the fact they were also from the era of the £1000+ clutch swap because of the new fangled DMFs and lots of people started to wonder if everyone jumping to Diesel was a good idea. VW CR engines were better in almost every respect, bar the whole cheating on emissions tests thing, the later AdBlue versions are pretty good (although Bristol doesn't seem to agree).
t. They tried to make them too advanced.The properly ancient stuff like the 90bhp in old Audis and VW stuff never died. A mate had an Audi 80 Avant on an N reg, and it was indestructable, engine wise. It had been clocked many times by the time he had it, and was showing 180k then. He took his around Europe giving it proper stick all the way and it just lapped it up. I rattled around in a PD130 Passat for a while, and it was the same. Ex company car, and the engine was dead fine. By dead fine I mean disgustingly unrefined, and quite stinky.
V8mate said:
Roofless Toothless said:
How do you achieve a double post on Pistonheads?
I've a fair number of posts behind me now and I have never managed it. What am I doing wrong?
iPhone users? They do it on FB too.I've a fair number of posts behind me now and I have never managed it. What am I doing wrong?
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