At least Scania are thinking of the children.
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…
I didn’t say a 420 V8 I said a 620 V8.It’s all about torque curves.Like I said there wouldn’t be much of a market out there for 620 Scanias either rev limited to,or with just an instruction to the buyer,to not take it over,1,200 rpm running at up to 44 t gross.
Carryfast:
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…I didn’t say a 420 V8 I said a 620 V8.It’s all about torque curves.Like I said there wouldn’t be much of a market out there for 620 Scanias either rev limited to,or with just an instruction to the buyer,to not take it over,1,200 rpm running at up to 44 t gross.
So why were you talking of defraying them earlier? Your right there’d be no market as it’d only work in your crazy head. You’ve not driven a V8 Scania have you?
switchlogic:
Carryfast:
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…I didn’t say a 420 V8 I said a 620 V8.It’s all about torque curves.Like I said there wouldn’t be much of a market out there for 620 Scanias either rev limited to,or with just an instruction to the buyer,to not take it over,1,200 rpm running at up to 44 t gross.
So why were you talking of defraying them earlier? Your right there’d be no market as it’d only work in your crazy head. You’ve not driven a V8 Scania have you?
I don’t need to drive a 620 V8 Scania to know that it won’t need to be taken up to 1,500 rpm when running at uk weights although anyone who doesn’t agree doesn’t have to.It’s a free country. 
But ‘Defraying’ 
. 
I could beat Casey Stoner no bother, I don’t need to ride a Moto GP bike to know that. 
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…I didn’t say a 420 V8 I said a 620 V8.It’s all about torque curves.Like I said there wouldn’t be much of a market out there for 620 Scanias either rev limited to,or with just an instruction to the buyer,to not take it over,1,200 rpm running at up to 44 t gross.
So why were you talking of defraying them earlier? Your right there’d be no market as it’d only work in your crazy head. You’ve not driven a V8 Scania have you?
I don’t need to drive a 620 V8 Scania to know that it won’t need to be taken up to 1,500 rpm when running at uk weights although anyone who doesn’t agree doesn’t have to.It’s a free country.
But ‘Defraying’
Ah my iPhone doesn’t seem to think derating is a word and I suppose it’s not.
Maybe once you’ve driven a V8 Scania I might take your opinion a bit more seriously when you challenge a man who’s owned 8 of the things. You have no idea how they react in the real world you just google figures and think you know it all.
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…
I’ve had this argument with him before Luke, Tesco would have had a fleet of rev limited V8 motors years ago if their was merit in it, and Scania would have willingly supplied them. Its a non runner for starters because of the weight penalty, and the extra friction of 2 more pistons and big end journals, another reason Merc are dropping their V8’s.
switchlogic:
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…I didn’t say a 420 V8 I said a 620 V8.It’s all about torque curves.Like I said there wouldn’t be much of a market out there for 620 Scanias either rev limited to,or with just an instruction to the buyer,to not take it over,1,200 rpm running at up to 44 t gross.
So why were you talking of defraying them earlier? Your right there’d be no market as it’d only work in your crazy head. You’ve not driven a V8 Scania have you?
I don’t need to drive a 620 V8 Scania to know that it won’t need to be taken up to 1,500 rpm when running at uk weights although anyone who doesn’t agree doesn’t have to.It’s a free country.
But ‘Defraying’
Ah my iPhone doesn’t seem to think derating is a word and I suppose it’s not.
You have no idea how they react in the real world you just google figures and think you know it all.
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.
Big Joe:
switchlogic:
Rubbish. You think if they could improve fuel consumption in the way you reckon they wouldn’t do it? It’s not about ‘suggesting’ things to customers, it’s about putting things on the market and if Scania could get better fuel consumption from a V8 420 than a straight 6 don’t you think they would? Surely theres at least a micron of logic in your head somewhere…I’ve had this argument with him before Luke, Tesco would have had a fleet of rev limited V8 motors years ago if their was merit in it, and Scania would have willingly supplied them. Its a non runner for starters because of the weight penalty, and the extra friction of 2 more pistons and big end journals, another reason Merc are dropping their V8’s.
I wasn’t exactly applying the idea to a local shop distribution fleet operation like Tesco 
.
I’m not saying that an inline 6 isn’t a good all round solution in a lot of,if not most,cases,but I don’t think that Scania is proposing to shut down future V8 development either.Which seems to suggest that there’s some future and more mileage in the idea yet and,contrary to many of the comments here,it’s most likely the potential of big multi cylinder V configuration engines’ ability,to put out plenty of low speed power/torque,that is probably the most likely reason for that .
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.
So why did you bring it up here then? -
Carryfast:
It seems to me that there’s a lot of wasted potential out there which ‘could’ be provided by the idea of just derating the most powerful options like the 600-730 hp versions by having around a 1,200 rpm rev limit in the engine management which would remove all the issues of the thing being put in ‘the wrong hands’.
You started on this rubbish derating bunkum. I dare say you’ll be telling us next it worked on a two stroke Detriot V8 in the southern US when an anti immigration white supremacist did it back in 1972 whilst waving the confederate flag.
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world. 
Carryfast:
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world.
Oh right yes of course, my world being the real world, where some of us have actually driven V8 Scanias
switchlogic:
Carryfast:
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world.
Oh right yes of course, my world being the real world, where some of us have actually driven V8 Scanias
Would that include the 620 version ?.So where,when and why did you need to take the thing up to over 600 hp at a max of 40-44t gross before upshifting it .
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world.
Oh right yes of course, my world being the real world, where some of us have actually driven V8 Scanias
Would that include the 620 version ?.So where,when and why did you need to take the thing up to over 600 hp at a max of 40-44t gross before upshifting it
I can’t even be bothered to answer that because whatever I say you’ll only spout one of your idiotic googled theories. Come back when you’ve got some real world experience of the things you talk about.
switchlogic:
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world.
Oh right yes of course, my world being the real world, where some of us have actually driven V8 Scanias
Would that include the 620 version ?.So where,when and why did you need to take the thing up to over 600 hp at a max of 40-44t gross before upshifting it
I can’t even be bothered to answer that because whatever I say you’ll only spout one of your idiotic googled theories. Come back when you’ve got some real world experience of the things you talk about.
Just an answer to question 1 will do.
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world.
Oh right yes of course, my world being the real world, where some of us have actually driven V8 Scanias
Would that include the 620 version ?.So where,when and why did you need to take the thing up to over 600 hp at a max of 40-44t gross before upshifting it
I can’t even be bothered to answer that because whatever I say you’ll only spout one of your idiotic googled theories. Come back when you’ve got some real world experience of the things you talk about.
Just an answer to question 1 will do.
No just a 580. How about you then? What’s the most powerful V8 Scania you’ve driven? What’s your real world experience that gives you the knowledge to preach at a man who’s owned 8 and tell him how to drive them? Also it’d be interesting if you could tell us where we can find all these figures you base your theories on.
■■■■■■■ in the wind is a phrase that springs to mind.
switchlogic:
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Carryfast:
switchlogic:
Carryfast:
Derating no never been done before.All just based on hearsay and figures and projecting the performance of an engine in service from the figures provided by the dyno readouts isn’t just common accepted engineering practice.In your world.So why did you bring it up here then? -
Because I don’t live in your world.
Oh right yes of course, my world being the real world, where some of us have actually driven V8 Scanias
Would that include the 620 version ?.So where,when and why did you need to take the thing up to over 600 hp at a max of 40-44t gross before upshifting it
I can’t even be bothered to answer that because whatever I say you’ll only spout one of your idiotic googled theories. Come back when you’ve got some real world experience of the things you talk about.
Just an answer to question 1 will do.
No just a 580. How about you then? What’s the most powerful V8 Scania you’ve driven? What’s your real world experience that gives you the knowledge to preach at a man who’s owned 8 and tell him how to drive them? Also it’d be interesting if you could tell us where we can find all these figures you base your theories on.
It was actually meant as a suggestion not an instruction.
I just got the figures from the manufacturers but what the zb would they know and why do they even bother printing the torque curves if no one gives a zb and no one bothers to read them before spending all their money on buying the wagon and just asking the driver what he thinks of it afterwards.
Carryfast:
I just got the figures from the manufacturers but what the zb would they know and why do they even bother printing the torque curves
What would they know indeed. (I left out the swear as it wasnt needed) Because that’s your problem isn’t it, you think you know best, not only as far as people who operate them are concerned but you seem to think you know better than Scania in many of your posts. You read a few fact sheets, put 2 and 2 togther and come up with 3,000. Whatever you may believe you don’t know how a truck really reacts until you get behind the wheel and drive it, something a fact sheet won’t tell you. If you had driven a variety of V8 Scanias you would know they can be very hit and miss out in the real world.
A 620 is only a 620 at close to its maximum RPMs, so in effect Carryfast is correct, because that’s the same way a 420 is only a 420 at close to maximum RPMs, which means that no matter what the badge says, anyone who is driving around keeping their engine between 1100-1500rpm is only producing about 70% of the maximum rated power, so your 620s are really 420s and your 420 is a 290
You hear the old boys raving about how quick their (for example) old 290 F88s were and that they would pull up Shap with only half a downsplit, true enough, because the 290 F88 was running at 2200RPM and producing every single one of its 290 gee gees all day long, if you treated the modern engines the same, with the same gearing they would be exponentially faster and by that measure thirstier too 
But dear Carryfast, you need to take into account the Specific Fuel Consumption Curve as well as Torque and Power Curves, otherwise you’re talking out of your arse
newmercman:
A 620 is only a 620 at close to its maximum RPMs, so in effect Carryfast is correct, because that’s the same way a 420 is only a 420 at close to maximum RPMs, which means that no matter what the badge says, anyone who is driving around keeping their engine between 1100-1500rpm is only producing about 70% of the maximum rated power, so your 620s are really 420s and your 420 is a 290You hear the old boys raving about how quick their (for example) old 290 F88s were and that they would pull up Shap with only half a downsplit, true enough, because the 290 F88 was running at 2200RPM and producing every single one of its 290 gee gees all day long, if you treated the modern engines the same, with the same gearing they would be exponentially faster and by that measure thirstier too
But dear Carryfast, you need to take into account the Specific Fuel Consumption Curve as well as Torque and Power Curves, otherwise you’re talking out of your arse
Sorry nmm but they haven’t provided me with that. So i’m just willing to guess/bet that a 620 will be using less fuel between the 1,000 rpm-1,200 rpm at which it’s still putting out more than enough to pull a 40-44 tonner around,than a 480 six will be getting through,at the type of engine speeds,that it needs to run at,to put out the same hp,as that torque monster V8 is. 
By the way the 620 is actually putting out more than 600 hp at 1,500 rpm and over 500 at 1,200 and more than 425 at 1,000 rpm. The torque curve is just totally flat at 3,000 nm max torque all the way from 1,000-1,400 rpm. and according to one of it’s drivers he’s getting at least 8 mpg by upshifting it at 1,500 rpm. Maybe you’ll start to believe now .