Unresolved

cars not pitting

Hi Paul.

You should check the following.

Are all of the engines in the same state of repair

Do all of the cars have the same fuel economy.

Have all of the players selected the same push level for the race. (Different push levels burn fuel at a higher or lower rate than your practice laps. Your practice laps should be roughly equal to neutral push)

A few other notes: it’s impossible for cars to start with fuel 0.1 different. You fuel in whole litres. Perhaps you are looking at fuel at the end of lap 1?

Consider swapping the league to no refuelling. In no refuelling you set the cars with how many laps to run before pitting on instead of setting a fuel load to carry you to an estimated lap number.

The research graph cannot be trusted alone for fuel consumption being the same as it is before considering supplier impacts

No not possible to force a change to no refuelling quicker sorry.

How about suppliers? As I edited onto the bottom of my last post, the research screen is not enough to validate FE being the same. It means you have all the same base FE.

Depending on supplier choices cars could be up to +35 or -19 on that figure. Which would cause significant differences in fuel consumption.

(+15 or -8 with regular suppliers)

The number next to the fuel economy is the true fuel economy.

The research page where it lists the people who are the best in each statistic is the “base” stats only. You mention that everybody has a red tick I think whcih would mean that everybody has the same base fuel economy.

The screen where all of the cars stats are displayed includes the suppliers.

The two most likely causes of this will be different fuel economy to expected or running at different push level to neutral. 

If it’s neither of those, I’d still be hesitant to call it a bug, more something that isn’t fully understood.

Do you mean you would like us to mark it as resolved Paul?

If the cars are pitting on a lap other than your intended lap you must have got the fuel load wrong for the stint. The fact you are competing offline means the push level is constant so getting the correct fuel calculation should be easier than online, which usually means variable push levels over the course of the race.

You have low level teams in a Rookie tier, so your Fuel Economy design will be quite low because the cap is 50 and you won't be getting many dp each race from your design HQ. The relationship between Fuel Economy design and Fuel consumption is not linear, so at low levels every FE design point will have a pronounced effect on fuel consumption.

Don't rely on the design review page to see the FE design for other cars on your league, this shows base design, it doesn't include supplier modifiers. As stated above, a few dp difference at very low design levels can easily result in cars pitting on different laps, even if they are all running identical PL (which I assume you can categorically confirm is the case).

If you use practice lap data to estimate the fuel required to run a stint, it is extremely important that you use a practice lap that is representative of how your car will line up on the grid in race trim. If you intend to repair cars for the race, then make sure they are repaired for the practice lap. Decide how many design points you intend to assign to Fuel Economy and do this before practice lap and finally, do not change Engine or Fuel suppliers after you have set your representative practice lap because these two suppliers will often adjust your Fuel Economy design.

Practice laps are completed at PL3, so if you intend to run the race at PL3, you will get very close to the correct fuel by multiplying the practice fuel consumption by the number of laps you intend to run for the stint.
E.g. If practice lap says 2.74 litres per lap and you want to run a 10 lap stint then it's 10 x 2.74 = 27.4 rounded up to 28 litres.

If you are going to run a something other than PL3, then you will need a little less fuel for lower PL and more for the higher push. Exactly how much less/more is something you will need to work out yourself.

Finally, if this is causing real problems for you and your competitors, you could try running a few seasons with No Refuelling rules. This means you can select which lap your driver(s) pit. After the race you can calculate average fuel consumption per lap and see how this compares to the pre-race practice laps. You can use this information to get an idea of how different push levels affect fuel consumption.

I hope this helps.