i think it needs to, just for idiots like the OP
^^^^^^^^^^^^^^^^^^ 
schrodingers cat:
Tonypv12 I really admire your tenacity, 3 pages for a wind-up not bad.
is that a record?
tonypv12:
schrodingers cat:
Tonypv12 I really admire your tenacity, 3 pages for a wind-up not bad.is that a record?
no, far from it 
Not yet but lets go for it
I really donāt understand why the OP has no idea that he (or she?) doesnāt know that the cruise is adjustable surely any professional driver would know that?
The way I read it was that his max cruise was set at 85 while his limiter was set at 90 using the pedal. One of my trucks in Canada wouldnāt go above 100 kph using the cruise as they wanted to encourage drivers to go slower for fuel savings, but using the gas pedal you could do the full 105 kph. If on cruise, you could floor the pedal to get the extra speed to overtake, let off and it would go back to 100kph, but that was as high as the trucks computer would allow the cruise to be set at.
Pimpdaddy:
One of the mechanics in our local dealer said to us it doesnāt really save fuel at all, it reduces instantaneous consumption but levels out because the engine has to run for a longer time I.e 56miles @ 56mph=1h, 56miles @ 50mph=1h6min. That extra 6 min still burns fuel & co2 emissions are produced, common sense but clearly management & some drivers are too stupid to figure that out-itās called āfalse economyāā¦!
if the same gear is used, an engine will rotate the the same amount of times over a given distance regardless of the the speed travelled and since itās the revolutions that burn the fuel and not time. how does running it for longer, at a lower but same amount of revs, whilst chucking less juice in mean itāll burn extra fuel in those 6 minutes?
What about the children - has anyone thought of the children yet?
beefy4605:
What about the children - has anyone thought of the children yet?
Yes, apparently, the OP is one of them
stevieboy308:
if the same gear is used, an engine will rotate the the same amount of times over a given distance regardless of the the speed travelled and since itās the revolutions that burn the fuel and not time. how does running it for longer, at a lower but same amount of revs, whilst chucking less juice in mean itāll burn extra fuel in those 6 minutes?
Many of the energy losses are proportional to the square of the speed (the speed multiplied by itself). In particular, the drag is proportional to the square of the speed.
Though there are some oddities to do with the gearing of the vehicle and the rev range where the engine is most efficient, usually the faster you go, the less fuel efficient you are. Itās not just a question of the time it takes you to complete the journey.
schrodingers cat:
Not yet but lets go for itI really donāt understand why the OP has no idea that he (or she?) doesnāt know that the cruise is adjustable surely any professional driver would know that?
im a he and i do know how to use the cc. the point i was trying to make was the agency driver spent about Ā£200 on having the cruise control on 2 different trucks adjusted by 3 mph at the Local DAF dealer . There was no need to do it the Speed Limiter is set a 55mph has he got an afliction with his right foot that stops him using the throttle to go that ectra 3mph? that money could have been spent towards new curtains for the trailers for the fleet. my curtains are like a cullinder with two large rips and loads of failed repairs. thanks for all the replies shame some of you had to resort to name calling because you did not understand what was said. but i liked the princess tramper that was ok. from the comments some of you need to go on one of those speed awareness courses. if you go to the one at Wrexham on a saturday take your own coffe or drinks as all that is available is WATER
stevieboy308:
if the same gear is used, an engine will rotate the the same amount of times over a given distance regardless of the the speed travelled and since itās the revolutions that burn the fuel and not time. how does running it for longer, at a lower but same amount of revs, whilst chucking less juice in mean itāll burn extra fuel in those 6 minutes?
Ok leave your engine idling for 1min, see how much fuel is consumed then leave it for another 6min, the difference is still a loss in fuel isnāt itā¦!?
Pimpdaddy:
stevieboy308:
if the same gear is used, an engine will rotate the the same amount of times over a given distance regardless of the the speed travelled and since itās the revolutions that burn the fuel and not time. how does running it for longer, at a lower but same amount of revs, whilst chucking less juice in mean itāll burn extra fuel in those 6 minutes?Ok leave your engine idling for 1min, see how much fuel is consumed then leave it for another 6min, the difference is still a loss in fuel isnāt itā¦!?
really?
are you that daft?
stevieboy308:
Pimpdaddy:
stevieboy308:
if the same gear is used, an engine will rotate the the same amount of times over a given distance regardless of the the speed travelled and since itās the revolutions that burn the fuel and not time. how does running it for longer, at a lower but same amount of revs, whilst chucking less juice in mean itāll burn extra fuel in those 6 minutes?Ok leave your engine idling for 1min, see how much fuel is consumed then leave it for another 6min, the difference is still a loss in fuel isnāt itā¦!?
really?
are you that daft?
obviously 
Of course Iām daft(cheers for noticing shuttlespanker)ā¦
How do you explain this then:
I did a shift on a Saturday with another driver & we both had the same run(Norfolk to Yorkshire and back). I had a tga 26-430 55plate & he had a tgx 26-440 09plate, we both had a full tank, same heavy load & the same height trailer, he was limited to 51 I was limited to 56. On the monday we checked the fuel log & noted the difference in the fill up on both trucks (approx 3 litres) & the difference in our paid duty time was 1.5 hours so you work it out from a total cost point of view from the company. Fuel & wages are some of the highest costs of running trucks & we all know that!
So to me(& probably our managers) the best way to cut costs was to reduce the head count & the number of motors running as opposed to cutting speed. If a company like tesco for example got rid of say 4 drivers & 2 trucks out of a fleet of approx 60 Iām sure they could still get all their stores covered & their fuel bill running @ 56 would come nowhere near the cost of employing 4 expensive drivers!
Another ridiculous claim on here from ours truly āshuttlespankerā
my old truck, if i ran it flat out at 56 MPh all day, i used to get 7.5 mpg, but, if i knocked it back to 52 MPh, i could regularly get 9+ mpg
if that was true every operator would do it donāt you think? The figures in actual fact are very small, less than 0.5mpg at that. If you wanted to get greater figures then youād probably have to have to ECU remapped by a third party which might void the warranty (if the vehicle is leased etc) & that might be why operators donāt do itā¦
You must work for a very rich boss, to be able to take it to Daf whenever you want just so the limiter can be altered
Pimpdaddy:
Of course Iām daft(cheers for noticing shuttlespanker)ā¦
How do you explain this then:
I did a shift on a Saturday with another driver & we both had the same run(Norfolk to Yorkshire and back). I had a tga 26-430 55plate & he had a tgx 26-440 09plate, we both had a full tank, same heavy load & the same height trailer, he was limited to 51 I was limited to 56. On the monday we checked the fuel log & noted the difference in the fill up on both trucks (approx 3 litres)
i have an 06 plate 430 TGA XLX and a 57 plate TGA 440 XXL, they both do the same work, but there is nearly 1MPG difference in fuel economy, this is down to the cat filters in the exhaust, and as such would equate to the same on the two that you have mentioned
Pimpdaddy:
& the difference in our paid duty time was 1.5 hours so you work it out from a total cost point of view from the company. Fuel & wages are some of the highest costs of running trucks & we all know that!
So to me(& probably our managers) the best way to cut costs was to reduce the head count & the number of motors running as opposed to cutting speed. If a company like tesco for example got rid of say 4 drivers & 2 trucks out of a fleet of approx 60 Iām sure they could still get all their stores covered & their fuel bill running @ 56 would come nowhere near the cost of employing 4 expensive drivers!
all based on your uneducated theory
Pimpdaddy:
Another ridiculous claim on here from ours truly āshuttlespankerāmy old truck, if i ran it flat out at 56 MPh all day, i used to get 7.5 mpg, but, if i knocked it back to 52 MPh, i could regularly get 9+ mpg
if that was true every operator would do it donāt you think? The figures in actual fact are very small, less than 0.5mpg at that. If you wanted to get greater figures then youād probably have to have to ECU remapped by a third party which might void the warranty (if the vehicle is leased etc) & that might be why operators donāt do itā¦
these figures on my truck were worked out using a pen, paper and calculator, i know exactly what the fuel figures were before i started doing 52mph, and after i started doing 52mph
as i am the one that owns the trucks, and also the one that ultimately pays for the diesel, i do know what they were doing whilst driving them at 56mph and whilst driving at 52mph
as another example, the MAN TGA XLX 430, driving at 56MPH was getting 8.5mpg, but when it was reduced to 52mph, it is now getting 9.84mpg
also, the driver doesnāt feel as stressed driving at the slower speed as he would if he was on the limiter all the time
the jobs that we do, the driver is hardly ever rushed to drive flat out, but, the 52mph limit on the trucks is a voluntary limit, they will infact do 56 if the driver so insisted
personally, i donāt really give a toss if you believe me or not, i know what the differences are at the different speeds, the drivers are quite happy to drive at the lower speed, unless they have to drive on the limiter to meet a booking time
Pimpdaddy:
Of course Iām daft(cheers for noticing shuttlespanker)ā¦
Try this then.
First walk 100 yards and see how you feel.
Next jog 100 yards and see if it was any more difficult.
Third, sprint 100 yards and perhaps you will be out of breath.
Itās still only 100 yards though.
The faster you go, the more effort it takes and if itās powered
by diesel, the more fuel it uses.
Pimpdaddy:
if that was true every operator would do it donāt you think? The figures in actual fact are very small, less than 0.5mpg at that. If you wanted to get greater figures then youād probably have to have to ECU remapped by a third party which might void the warranty (if the vehicle is leased etc) & that might be why operators donāt do itā¦
But they do, thatās why itās not hard to overtake most of Wincantonās (5000 strong) fleet or Maritimeās.
Regards,
Nick.
billybigrig:
Pimpdaddy:
Ok then calculate the additional time wasted, wages bill for extra hours incurred etc, all works out the same to me working on your theoryā¦1000 miles at 56mph = 17.85 hours
1000 miles at 50 mph = 20 hours
So unless Spankers is paying 70 quid an hour heās laughin
And those times are based on MAX. Chances of sustaining 56mph for 1000 miles, that many 50mph zones, road works, slower moving vehicles, you get boxed in behind a tesco truck by a royal mail truck (theyāre damned quick) etc, 50 (ish) mph is more comfortable, saves a bomb in juice, and gives you a bit in the bank for passing.
When I was on Turners, Iād run around 81kph, which let most things pass me but I still had 8kph in the bank for passing, me and a colleague (flat out type driver) both did Knowsley to Southampton, both had to stop for a 45 on the A34 (couldāve made it a bit further, but no point), I pulled up to the same ā ā ā ā ā ā ā ā ā ā ā ā when I saw his truck, and his tacho was registering 8 mins break, and this is after Iād stopped, put my tacho on break, put the kettle on and walked over to his truckā¦ Massive saving that 8kph. I averaged 9.1mpg in my time there, he averaged 7.9mpgā¦
I think the company shouldāve shared the fuel savings 
tonypv12:
schrodingers cat:
Not yet but lets go for itI really donāt understand why the OP has no idea that he (or she?) doesnāt know that the cruise is adjustable surely any professional driver would know that?
im a he and i do know how to use the cc. the point i was trying to make was the agency driver spent about Ā£200 on having the cruise control on 2 different trucks adjusted by 3 mph at the Local DAF dealer . There was no need to do it the Speed Limiter is set a 55mph has he got an afliction with his right foot that stops him using the throttle to go that ectra 3mph? that money could have been spent towards new curtains for the trailers for the fleet. my curtains are like a cullinder with two large rips and loads of failed repairs. thanks for all the replies shame some of you had to resort to name calling because you did not understand what was said. but i liked the princess tramper that was ok. from the comments some of you need to go on one of those speed awareness courses. if you go to the one at Wrexham on a saturday take your own coffe or drinks as all that is available is WATER
tonypv12:
That was until i went on holiday for a week got back and the cruise control was now set at 90k 55mph by an agency driver. He had taken it into DAF and had it adjusted to what he thought was correct. So whe i found this out i protested and had it set back to 85kph.
Ahh, so he wasted money having the CC put upto the limit, but you didnāt waste it having it took back down??
You expect him to hold his foot on a throttle for 9hrs a day to get the limited speed, but you canāt press a cruise control minus button 3 times?? 
But they do, thatās why itās not hard to overtake most of Wincantonās (5000 strong) fleet or Maritimeās.
Wincanton & maritime arenāt the majority of operators on our roads. Last time I heard wincanton was struggling in this climate and they want out, itās a ā ā ā ā company!
also, the driver doesnāt feel as stressed driving at the slower speed as he would if he was on the limiter all the time
I feel stressed & sleepy, thatās why i donāt drive that slow!
all based on your uneducated theory
Yes it may be an uneducated theory but it makes sense to me & it has been done @ our place. Getting rid of 4 tesco drivers for example saves minimum Ā£100k in wages alone #fact!
personally, i donāt really give a toss if you believe me or not, i know what the differences are at the different speeds,
Ok fair enough fella. No I donāt believe you because as I said before if it was true & the savings(looking @ the bigger picture overall)were that great then every single operator would have done it years ago. I believe there are other ways to save on fuel without dropping the limiterā¦