Some strange numbers...

Today in the race I saw strange numbers in terms of fuel
In practice, the consumption was 1.91 per circle, since today it was Monaco 59 circles I filled 113 liters(1.91x59=112.69), since it was 22-23°C in the race, in theory, there should have been enough fuel to get to the finish line (+/-0.1l at the end), because I drove almost the entire race on PL3 sometimes dropped to PL2, so yes I attacked at the start of the race and drove about a whole lap on PL5, but this is not enough to explain why I did not have enough 0.5l at the finish line (screenshot), So I actually have a question, like why?

P. S. Sorry for English.

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John Doe
1 year 51 days ago

You always have to fuel minimum +2 liters that calculated, sometimes even +3, depends on the push level

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Kevin Bissell Super Mod
1 year 51 days ago

Hi Sergio.

The thing I find strange is not that you were about 0.5 litres under fuelled for the race. It is the fact that the data you posted suggests you would have run out about three quarters of the way around the last lap, yet your driver still set his fastest lap on that final lap.

It is quite easy in the heat of battle to set PL a bit high. You have done a 100% distance (59 lap) race with no refuelling and only fallen short by about 0.5 litres. This equates to a shortfall of 0.008 litres per lap.

Because of the relationship between PL and fuel consumption, do you know that if you do half a lap at PL1 and the other half at PL5 the average fuel consumption for that lap will be close to PL4? So if you spend most of the race on PL3 but a few laps on PL5 plus a lap boosting it is very easy to use that extra 0.5 litres of fuel across the entire race distance.

What was your FE design before the Monaco race?
Did you change suppliers or custom engine settings after setting the practice laps? For example, do the practice laps with a +FE engine then change it to something else for the race.
Did both of your drivers only have 1.4 litres remaining at the end of lap 58?

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Sergiy Nevidomo
1 year 51 days ago

Kevin

Hi Sergio.

The thing I find strange is not that you were about 0.5 litres under fuelled for the race. It is the fact that the data you posted suggests you would have run out about three quarters of the way around the last lap, yet your driver still set his fastest lap on that final lap.

It is quite easy in the heat of battle to set PL a bit high. You have done a 100% distance (59 lap) race with no refuelling and only fallen short by about 0.5 litres. This equates to a shortfall of 0.008 litres per lap.

Because of the relationship between PL and fuel consumption, do you know that if you do half a lap at PL1 and the other half at PL5 the average fuel consumption for that lap will be close to PL4? So if you spend most of the race on PL3 but a few laps on PL5 plus a lap boosting it is very easy to use that extra 0.5 litres of fuel across the entire race distance.

What was your FE design before the Monaco race?
Did you change suppliers or custom engine settings after setting the practice laps? For example, do the practice laps with a +FE engine then change it to something else for the race.
Did both of your drivers only have 1.4 litres remaining at the end of lap 58?

The first thing about the race itself, I repeat once again I put pl5 at the beginning of the race, that is, in the first laps, since I go the first segment on the supersoft at 22°C, it quickly overheated, so it was impossible to finish a full lap, so I changed the level to pl3 and below, the soft worked perfectly on pl3, so there was no point in setting higher, I drove all 57.5laps like this, sometimes changing to pl2 in the second half of the race.

On the last lap, when I already realized that there was not enough fuel, I changed the pace to pl1 in order to somehow get to the finish line, since my pilot(O. Bandera) was riding almost alone, I practically did not use the battery, so at the end of the race it was enough to set a fast lap.

So my FE 50, yes i changed to FE engine, and go only one lap with him, and yes both drivers.

P. S. Yes, I know how much % affect PL for fuel per lap

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Dick Dastardly
1 year 51 days ago

It might help if you also posted a screenshot of the opening few laps

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Kevin Bissell Super Mod
1 year 51 days ago

TBH, I don't find this surprising. Even 1 practice lap with a +FE engine would be sufficient to bring the average practice lap FE down enough to affect the calculation. As I said above, you were only under fuelled by 8 thousandths of a litre per lap.

My slightly conservative calculation says at constant PL3, Monaco 100%, 50 FE, you would need 113.97 litres, so load 114.

You say the practice lap said 1.91 litres. Was this the average consumption across the 5 laps or the consumption that was indicated with the +FE engine?

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Sergiy Nevidomo
1 year 50 days ago

Kevin

TBH, I don't find this surprising. Even 1 practice lap with a +FE engine would be sufficient to bring the average practice lap FE down enough to affect the calculation. As I said above, you were only under fuelled by 8 thousandths of a litre per lap.

My slightly conservative calculation says at constant PL3, Monaco 100%, 50 FE, you would need 113.97 litres, so load 114.

You say the practice lap said 1.91 litres. Was this the average consumption across the 5 laps or the consumption that was indicated with the +FE engine?

What the heck is this numbers? Why 113.97? It's already ≈1.93 per lap. You said I under fuelled 0.008(twice), not 0.02

Yes 1.91 per lap, In practice, it looked like this:
5. 1.91 SS
4. 1.91 S
3. 1.91 S
2. 1.85 S
1. 1.91 S

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Kevin Bissell Super Mod
1 year 50 days ago

Hi Sergiy

Sorry, I didn't make myself clear. If I plug your FE into my fuel calculator (which I've been using for years and I know to be pretty accurate) it says you need 113.97 litres (1.932 litres/lap). So yes, the practice lap data the game provided you with (1.91) is about 0.02 litres per lap lower than my calculation.

The 8/1000 litres per lap I talk about is the what your post lap data says you under fuelled by. At the end of the penultimate lap you had 1.4 litres in the car and it is 1.9 litres per lap so you were 0.5 litres light. It's a 59 lap race, you under fuelled by 0.5 litres... 0.5 / 59 = 0.008 litres/lap average across the race.

Either way it's very small margins of error and only really becomes a problem in 100% NRF races, because the more laps you run the more significant is the error. A few hundredths of a litre per lap over a 10 lap stint in a refuelling race is not going to be a problem, but the same error over 50 laps suddenly begins to have an impact.

You still won the race despite being slightly under fuelled. It is difficult to estimate average PL in an on line race, especially if you're one of those managers who is adjusting PL multiple times every lap. As Luke says above, if you're going to use the practice lap data a litre or two safety margin would be recommended for a 100% NRF race.

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Sergiy Nevidomo
1 year 50 days ago

It's weird anyway, because it's huge diference between race and practice, and i know it has diference like 0.2 and the end of race or ≈0.003 per lap(59laps, depends on the track), that's why I asked, but anyway thanks.

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Red Craigie Super Mod
1 year 50 days ago

I will add that practice lap data isn't perfect, with zero setup changes it's possible to have a variance of up to 0.02 between any two laps on FE.

Just today I have run 5 laps with the same FE and got the following FE results:

2.45
2.46
2.46
2.46
2.47

(Track was Europe)

so if planning fuel solely off of practice laps for a PL3 basis, this is also something you need to keep in mind.

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