Please discuss here all your remarks and pose your questions about all racing series, except Formula One. Both technical and other questions about GP2, Touring cars, IRL, LMS, ...
I think it would be interesting to compare the differences and similarities of the top sports car prototypes with the top open wheel formula. So if anybody can help with some data I would be glad to learn about:
lap time Spa
fuel consumption diesel and petrol
downforce
downforce to drag coefficient
weight
tyres
Some of the stuff I can find myself but certainly not all. I would like to find out how fuel efficient F1 and LMP1 cars are in comparison and how engine and aero specs contribute to the differences.
Formula One's fundamental ethos is about success coming to those with the most ingenious engineering and best ..............................organization, not to those with the biggest budget. (Dave Richards)
I think the Ehtanol fuels should be added too as there is a difference between them as well.
I was tweeting with Lord Drayson of Drayson Racing.I was asking about the differences between the fuels they have to run E85 and E10. He said that the fuel consumption and power differences were "certainly worthwhile" when asked if the difference was large between the two. I assume that the difference is the same engine with the same air-restrictor.
Apologies that it's off-topic but I thought it somewhat relevant and interesting.
"It could be done manually. It would take quite a while, but it could be done. There is however a much more efficient and accurate way of getting the data. Men with lasers." Wing Commander Andy Green
as the 2003 bentley was a fairly advanced design already I assume this will make for a good base when calcualting the downforce levels for LMP1
as for tyre size:
current Audi R15plus ,also from mulsannescorner ,latest news:
It also comes to our attention (via RCE's Sam Collins) that the R15 plus is running on 33/68-18 Michelins at the front and 37/71-18s at the rear. Same as the R15...same as the R10.
E10 is pretty widely used in US/Canada now, I believe most gasoline you can get here have 10% of ethanol content. The E85 being much less dense energy wise you would need to use more of it than gasoline(E10)....although I believe the equivalent octane rating is much higher.
I think fuel economy figure can be seen from record of Le Mans 24. I believe I've heard back in R8 days the car with FSI can run ~15 laps on 90 liter of fuel(gasoline). R10 when it had the 90 liter tank was maybe that much plus maybe 1 more? ~16laps? With 81 liter tank for the diesels I think that figure is 12-13 laps. Someone might be able to confirm that better...
Lap time at Spa in 2008, Pole for the LMS race was a 1:58.069, the fastest Q2 time for 2008's F1 race was 1:46.036.
So LMP1 would be 11.3% slower than F1. That would be significantly outside the 107% rule of F1.
How long is a lap of Le Mans? It would be needed to calculate the fuel consumption.
Formula One's fundamental ethos is about success coming to those with the most ingenious engineering and best ..............................organization, not to those with the biggest budget. (Dave Richards)
The 908 will be closer to 600BHP this year rather than 700 given the tightening of the air restrictors and the loss of the advantage the closed-cars got to compensate for AC.
So 16 laps of Le Mans would give us 218 km.
So 90 L for 218 km would give us a base line of 41.3 L Diesel/100km
Per volume the LMP1 Diesel takes about 2/3 of the F1 fuel consumption, is that correct?
Diesel has 38.6 MJ/L
Petrol has 34.8 MJ/L
Last edited by WhiteBlue on 21 Apr 2010, 22:53, edited 1 time in total.
Formula One's fundamental ethos is about success coming to those with the most ingenious engineering and best ..............................organization, not to those with the biggest budget. (Dave Richards)
We used to have exact figures when we discussed the different engines for 2010 season.
I have checked an AMuS article which quoted 2.4 L per lap of Brazil. With a lap distance of 4.3 km I find a consumption of 55L petrol/100km.
I find:
LMP1 Diesel: 1.6 GJ/100 km
F1 Petrol: 1.9 GJ/100 km
F1 Petrol 18.8 % higher fuel consumption while the performance difference was 13%. If you compare LMP1 petrol the fuel efficiency is probably in line with the performance difference.
Formula One's fundamental ethos is about success coming to those with the most ingenious engineering and best ..............................organization, not to those with the biggest budget. (Dave Richards)
