BRC 1976 - Under Pressure [E8-Q]

[Lordred]

Oh man, those two pits in the last 10 laps…

I Need to change that do not pit window.

[Absurdist]

I’d say likely 2 or more weeks. Not only do they need everyone involved free on the same day, but it’s quite a bit of work. And it may be longer because Der Bayer is likely going to spend time working out the kinks apparent in the first race.

[Der_Bayer]

@Matti

I can’t explain some of my pit stops. The car pitted with 5% tyre wear and the tyre wear was also listed as the reason, despite the threshold being set to 30%. Happened multiple times. Can’t explain myself. Help.

That’s because you set your tyrewear threshold to 5%. That’s what is standing in your strategy file, not 30%.

@TheBobWiley

I am not that mad with what happened, would just like to know what happened with my pits there so I can avoid it in the future races, or if its a bug you can fix it.

I pitted around 30 minutes to change from intermediates to drys and did not take on fuel. I believe this fell inside my “replace regular %” for my upcoming planned stop at 45% race time. Because I did not take fuel I thought I would then stop again in a few laps at the planned 45% for fuel, but I passed it kept racing until about 55% race time (I think) when I finally went in for emergency fuel I assume. I ended up running out of fuel in pit lane just before pulling into my pit area.

Your pit stops were planned at 25%, 50% and 70% (according to your info file).
1st pit stop was caused by weather at 22 mins/lap 20. This replaced your first pit stop and you took fuel. Then you kept on going until a bit after 50% (end of lap 45, as the trigger was set at the end of lap 44 = 50%). So the pit stop time was 100% correct, only fuel was not enough
So except the running out of fuel thing everything went as expected.

@CriticalSet9849

My car had more than enough fuel capacity to make that stop, and it just barely made it, so it seems like the safety margin might be just a bit too low, I think the problem for me was possibly the unplanned pit to change tires where I did not take on extra fuel as it did not replace a stop, but would have used fuel sitting in the pit?

I think the main cause was the higher fuel consumption in the race and you being more punished by it because your car needs more fuel than most of the other cars. In the future I will calculate the average fuel consumption in the race and take that number for the fuel amount if it is higher than the value from practice.

@FrankNSTein

So, if a car needs to pit for fuel outside the window specified where unplanned stops should be done, it should just take fuel and not do anything else in the pits.

Definitely true, I will check that.

@Leonardo9613

What about a system that allowed us to tell which emergencies to tackle?

For example, right now, I could just lock the % of race time I want the unplanned stops to happen, however that would mean the car wouldn’t stop in case it got damage. In another scenario, I would quite like to have optimal % to change tyres, but I wouldn’t want to compromise my stint because of them, in that case I would like to disallow the pits due to weather, yet keep good rain/inter thresholds. So, if there was a tick box, in which I could decide whether or not I want to pit due to that issue, we could choose our strategies better, and not have extra pits due to weather or the safety car, yet still be covered if some catastrophic issue happened.

So would separate “don’t pit” race time windows for weather, tyre wear and for damage do the trick? That should be possible (not in this season though).

@CriticalSet9849

Have 2 sets of values for everything, the first only occurs if within % of race time, the second is a kind of extreme value where the car will pit outside the % of race time rule (may not necessarily need to be extreme values but could be used to separate things like damage and sc reaction from the race time rule for those that want to use it that way), in the event of early crashes this would be useful.

Another suggestion is as well as a % of race time threshold there could be an option to stop your car from pitting outside of the margin for replacing a pit stop (unless the extreme value as above requires you to pit outside that window).

This would have saved myself and i’m sure a few other people from picking up an extra pit within only a few laps of the pit replacement threshold, and i’m sure it would take a lot of guesswork out of predicting exactly what lap the humidity will drop below the threshold or what to set the threshold to in order to replace tires at the intended pit window.

I think I understood what you want… I will note this down and keep in mind for future strategy system changes. Not for this season though.

@Steel

Very roughly, how often are races likely to be?

Usually roughly in 2 week intervals. Until next race it could take a bit more time because of the necessary fixes.

To do list for me:

• check why last minute pit stop happened (Leo)
• check short pit stop bug (0.2s)
• revise fuel safety margin
• make pushing car to pit possible
• dynamic fuel consumption estimation, using race fuel consumption in case it is higher than in practice
• no changing tyres if unplanned fuel stop outside pit window
• check stuck in pits bug

Have I forgotten something?

The next race will be announced once I fixed everything and tested the shit out of it…

[TheBobWiley]

@Der_Bayer, ok that was my bad then, I thought I had set the 2nd pit at 45%. Thanks for the info.

[Matti]

Sorry, my bad. I was looking at the table 2. Should triple check next time. Still don’t know how that happened.

[Riso]

@Der_Bayer

Have I forgotten something?

@NormanVauxhall 's car finished the race. That’s clearly a bug.

[KLinardo]

I said his name and everything.

[TheBobWiley]

@Der_Bayer, just wondering when the video will be on youtube. Want to go back over it to get a better handle on my fuel usage for future races.

EDIT: I can re-watch it from the Live Stream link’d above, but I couldn’t find it just searching for BRC 1976 on Youtube.

[TheBobWiley]

Ok, just want to put the info on here.

Watching the race my pit error came at the 34 minute part of the race, putting the unplanned pit at 38-39% of the race. I took no fuel during the unplanned pit for inters-to-wets and it did not replace the planned 50% stop. Apparently the game thought I could make it, but I was roughly .3 kg under what was needed to make it to my pit area.

What I am confused about now is, do you take fuel during unplanned pits? If they had splashed in just 1kg of fuel while changing the tires I would have been golden. Hopefully I will have my pit calculations dialed in for the rest of the season, my car can definitely compete with the top 5, just have to get the strategy right.

[Puffster]

Wow, that was just pure unlucky! New season seems more safe, but I guess someone had to go out with a bang, just not thrilled that it was me Sorry to mattmr2 for crashing into you, but at least the driver’s dead so hopefully it wont’ repeat itself.

Just a quick question to @Der_Bayer : I intended to set my strategy to start with 80% fuel but started with full tank, can you tell me what I did wrong? I noticed others like mer:at and austrogalant did not start with full fuel tanks.

Interesting side note, only 2/10 in top ten qualifiers where on sports tires, but 5/10 after finish were, still have some hope for the rest of the season

[koolkei]

2 things.
my car drank fuel more than expected. significantly more. i’m afraid i would need a 3 or 4 stops on the nordschliefe(however you spell that)

i’m pretty sure my car is also capable of at least being near to the top 10. just that first turn screwed my royally. moving from 56th to 23th is proof enough i think. (curse you @marcus817)

[Der_Bayer]

@TheBobWiley

Watching the race my pit error came at the 34 minute part of the race, putting the unplanned pit at 38-39% of the race. I took no fuel during the unplanned pit for inters-to-wets and it did not replace the planned 50% stop. Apparently the game thought I could make it, but I was roughly .3 kg under what was needed to make it to my pit area.

What I am confused about now is, do you take fuel during unplanned pits? If they had splashed in just 1kg of fuel while changing the tires I would have been golden. Hopefully I will have my pit calculations dialed in for the rest of the season, my car can definitely compete with the top 5, just have to get the strategy right.

Your pit stop window is 11%, so you went in juuuust outside that pit window. And that’s the reason why your stop was not replaced and why you didn’t take any fuel. You don’t refuel on unplanned stops if it is not an emergency fuel stop and if it is outside the pit window.

@Puffster

I intended to set my strategy to start with 80% fuel but started with full tank, can you tell me what I did wrong? I noticed others like mer:at and austrogalant did not start with full fuel tanks.

Your first pit stop was set to 47% (lap 41-42). Your practice fuel consumption was 1.49 kg/lap → 62.5 kg without safety margin. You started with 65.3 kg. Difference is safety margin (or less than that, but tank is full).

[KLinardo]

@Der_Bayer

You don’t refuel on unplanned stops if it is not an emergency fuel stop and if it is outside the pit window.

Would it be reasonable to always take 5-10s worth of fuel on an emergency tire stop? The stop has to take longer than that anyway and you’re not taking on that much extra weight, but you should have some extra safety margin if you pit just outside your window. It’s fuel you don’t have to put in the car at the next scheduled stop too.

[Der_Bayer]

There are always people which will be complaining when they are carrying more fuel than they planned. It is you job to make it happen that unplanned stops fall into your pit stop window. If you want to refuel, just make your window big enough.

I will add a check for unplanned stops outside the pit window though, which will estimate again if you make it to your next planned stop/race end. If not, refuel accordingly.

[KLinardo]

Fair enough. My driver just needs to actually leave the pits after stopping.

My logic was just extra weight from extra fuel added at an emergency stop > not finishing the race because I misjudged my fuel consumption.

[TheBobWiley]

@Der_Bayer, Ok, that was what I feared would happen setting my replace window to 11% that if I magically hit an unplanned pit just outside of the 11% I would be screwed for fuel if it did not take on fuel. I was just unlucky… which I should have been expecting based on my luckiness in the previous seasons, and IRL in general.

Lesson learned: Have all the fuel margin!

[Steel]

Yeah, I agree with Der Bayer here.
In my particular case 5 seconds of fuel at each of my unplanned stops would have left me with almost 40 laps worth of extra fuel over the race.

[FrankNSTein]

@Der_Bayer

You don’t refuel on unplanned stops if it is not an emergency fuel stop and if it is outside the pit window.

Now that’s something new … and can be significant for strategies.

Let’s say I pit for tires with 5 laps of fuel left in the tank, the next planned stop being 20 laps away and not in the window.

I then don’t take fuel on the tire stop, but do another one 5 laps later for the fuel?

[Der_Bayer]

In my following post to your quote is the information. It will be checked if you make it to the next planned pit stop and refuelled if not. There just won’t be arbitrary refueling just because the car is standing at the pits.

[Absurdist]

So many likes

Certainly I am going to screenshot my strategy for reference next race. So as to avoid embarrassing myself when I incorrectly remember it.