Here is a scan of a chart for 2 dyno tests on a C4 Citroen. Taken 11 days& 800Km apart. The red lines being kW & Nm for B100, The blue for B25. It had had B25 running through it for 600Km before the second test.
I had originally done these same tests using another Dyno with Strait fossil diesel first & B100 3 weeks & 2000Km later but the results were so massively different as to be unbelievable....eg; The machine said 46% less for Maximum Power on the B100 with no appreciable difference in the Torque readings. However this was not noticable when driving the car & one tends to notice such things. So this was obviously bull ****. The first dyno also said the max Power on Fossil diesel was only 46kW at around 3000rpm, as opposed to 54.7kW on the latter machine....The temperature was 33?C & the humidity 78% for the B100 test 7?C hotter & 22% higher than the B25 test. I don't know if it is relivant but there it is.....You can feel the difference on B100 & if you look up the 2500rpm line the difference in power & torque is approx 35% less on B100. This is not as drastic as it sounds as it seems to make very little difference to driving the car.It doesn't feel like 35% less power. It still pulls like a 14 yeay old boy when taking off. It glides along at 100/110kph on the highway & is happy in stop start traffic & 'round town. Fuel consumption tests taken in 2000Km blocks would indicate that B100 =4.8L/100Km & all other mixes seem to give the same at 4.5L/100Km. The glossy brochure for the car says 240Nm @1750RPM & 80kW @ 4000RPM. The flattening line at 3000RPM (I suspect) is the traction control kicking in as the driving wheels are doing 100km/h odd & the back wheels aren't. every warning light to do with ABS & ESP start flashing as do all 4 indicator lights. It could also have to do with the mapping to stop hoons trashing the vehicle before it is properly run in & may be changed at the 20,000k service. I have asked Citroen about this but apparently it is a secret.
/Users/rafefalkiner/Desktop/DYNOTESTS.jpg
I had originally done these same tests using another Dyno with Strait fossil diesel first & B100 3 weeks & 2000Km later but the results were so massively different as to be unbelievable....eg; The machine said 46% less for Maximum Power on the B100 with no appreciable difference in the Torque readings. However this was not noticable when driving the car & one tends to notice such things. So this was obviously bull ****. The first dyno also said the max Power on Fossil diesel was only 46kW at around 3000rpm, as opposed to 54.7kW on the latter machine....The temperature was 33?C & the humidity 78% for the B100 test 7?C hotter & 22% higher than the B25 test. I don't know if it is relivant but there it is.....You can feel the difference on B100 & if you look up the 2500rpm line the difference in power & torque is approx 35% less on B100. This is not as drastic as it sounds as it seems to make very little difference to driving the car.It doesn't feel like 35% less power. It still pulls like a 14 yeay old boy when taking off. It glides along at 100/110kph on the highway & is happy in stop start traffic & 'round town. Fuel consumption tests taken in 2000Km blocks would indicate that B100 =4.8L/100Km & all other mixes seem to give the same at 4.5L/100Km. The glossy brochure for the car says 240Nm @1750RPM & 80kW @ 4000RPM. The flattening line at 3000RPM (I suspect) is the traction control kicking in as the driving wheels are doing 100km/h odd & the back wheels aren't. every warning light to do with ABS & ESP start flashing as do all 4 indicator lights. It could also have to do with the mapping to stop hoons trashing the vehicle before it is properly run in & may be changed at the 20,000k service. I have asked Citroen about this but apparently it is a secret.
/Users/rafefalkiner/Desktop/DYNOTESTS.jpg
Comment