iRacing SPA 24 Hour 2023

Which GT3 car do you want to drive for the Spa 24?

  • Bimmer

    Votes: 2 50.0%
  • Merc

    Votes: 2 50.0%
  • Something else and I will make my choice known, you can't tell me what to do

    Votes: 0 0.0%

  • Total voters
    4

Deb

Moderator
@Nejtun, I posted the question on the Special Events forum and I have not received a response. The setup I sent was in VRS before I changed it slightly and it was stated it was for the 24 hour event. So this seems to be an iRacing issue. I'll ask the question to iRacing itself and see if I get an answer.
 

Nejtun

Moderator
Nice one @Deb I hope we got some light thrown on this. Is that setup for THIS 24 hour event coming up? or the last one in 2022, if it new then I am even more confused.

Hans did suggest that we are never going to be on a completely empty track with 20% usage for any amount of time, but still I have not seen anything this drastic before.
 

Deb

Moderator
It's the setup they had for 2023 Season 3 for SPA, so I would think it is for the current 24 Hour event. I pulled the endurance setup.
 

Nejtun

Moderator
Thanks for clarifying! I guess we can press on and use this for practice over different times of day, thanks for sharing. Fingers crossed wee get some answers about the tyre wear as we go along!
 

Deb

Moderator
lol.

Has everyone tried the Merc?

We just ran a 24 hour event with it so maybe it's moar g00der?
I think @Nejtun said he tried the Merc and had the same issue. Nejtun, were you driving in a test session by yourself? I thought I would try an experiment and did a session with AI. I didn't get a need rubber call until lap 17. I was able to get in a FFS, but that was only 22 laps and the last laps were a struggle but not impossible. I was on the setup I posted. I set the weather to 78 degrees, but forgot to put it to afternoon so it was late afternoon. By the time I finished, it was fairly cool, 25 degrees weather, 27 track. So may not be a fair comparison. The best AI were running in the 2:17s. I was running from the high 2:21s to 2:23s. Here is where my tires were at at the end of the stint. Much better than yesterday but still not great. I may try jumping in a hosted session tomorrow and see what happens.

IMG_2677.jpg
 

Nejtun

Moderator
@Kenadian yup, as Deb said I tried the Merc with the same results, Bear in mind I had the worst possible conditions to test in. I will also jump into a hosted at some point and see what happens with that. Deb's setup is sound so we can just run with that and see what happens from here onwards.
 

Deb

Moderator
iRacing is asking for a replay. @Nejun did you happen to save any of your stints with the tire issue? They just wanted splices of what the problem is.
 

Nejtun

Moderator
iRacing is asking for a replay. @Nejun did you happen to save any of your stints with the tire issue? They just wanted splices of what the problem is.
I did not save a replay....
If it happens again when I jump in a hosted I will save the replay of the event.
 

Deb

Moderator
I did not save a replay....
If it happens again when I jump in a hosted I will save the replay of the event.
Okay, I sent all of our pictures into iRacing since I don't have a replay. I would think this would be enough but we'll see.
 

Deb

Moderator
So this is hilarious, iRacing response to all the information I sent them is:

"The tire wear you have described is working as designed and consistant with overdriving and/or excessive ABS activation."

Yeah, how many endurance races have we done and never had an issue with tire wear???? You guys just did Nurburgring and didn't have this issue???? iRacing are you listening????
 

Skid_Marc_

Staff member
Admin
I went ahead and did a stint just to see what I'd get with Nejtun's HDF Enduro V2 setup.
57085857ca0e2f52cffe0e5a82be27c6.png

fddd53754ad3747865050d916faaee7d.png




"The tire wear you have described is working as designed and consistant with overdriving and/or excessive ABS activation."
I don't know that any of us are really qualified enough to tell iRacing they're flat-out wrong... The question is what are you going to do about it?

In my full stint, I never saw the ABS lights flicker, ever, so I'm guessing the key is to stay out of the ABS. I don't remember if Nurb was before the ABS rework, or not, but I'd also say it is easier to be over-confident/over-drive Spa (a 7km race track that almost anyone has memorized like the back of their hand) compared to the Nurb (a 24km monster that only 1% of the 1% truely has memerized) that I personally know I was driving scared >90% of the time.

This was at 40% track state. I feel like even that is low, but anything less than that seems to be a waste of time. We know the tracks will rubber-in in endurance events, just the rubber that gets put down in warm-up and qualifying is always impressive, and that the first stint is always the worst on tyre-wear, so this should be worse-case scenario.

If you're in the ABS, you're braking too hard, minimize your braking when turning in (like, to zero, if possible), error on the side of turning into a corner too-early rather than too-late (don't late-apex ANYTHING), and DO NOT brake on the curbs. You can use the curbs on exit when accellerating, but the ABS will flicker if you brake on them, and I can feel a LOT of sliding on the curbs, so don't even look at them when braking.


When I used the same time of day, but added some clouds, the tyres looked even less sketchy. I was actually impressed by the consistency over the run. I usually don't see that, so that was weird. Any anomolous lap was due to my wheel not shifting, not because of handling.
68a060d480a74a0575ecbb142f544e4b.png

 
Last edited:

Nejtun

Moderator
Thanks for having a go at this Marc, it feels like the more I play this the less I feel like I know what I am doing...
Anyway, the HDF set had around 7-8 out of 11(max) ABS setting, The VRS set had 11 ABS.
Should we turn this right down (I only ever saw my ABS lights come on right at the end of the stint when the tyres were screwed anyway) just to make sure it is kicking in as little as possible?

I will do a stint with your track settings and see if I can get as good results out of it as your ending tyres condition seems much more reasonable. I will also try the VRS set with the same track state and see if it performs better although both of them gave back the same kind of times with the 20% track state but maybe the more realistic track will show a bigger difference.

If everyone driving the race next week could also try both and post here if you have a preference (before Monday 17th if possible) so we have a full week of driving on a finalised setup. Please take into account the things that Marc pointed out so you get more realistic results:

Track state 40% (or more)
Weather 30 degrees C
Clear sky/ Partly cloudy (maybe dynamic will take care of this but if you are trying both sets then you might want to set it manually)
be particularly mindful of the things mentioned about the ABS.
Both sets attached below to avoid confusion!
 

Attachments

Nejtun

Moderator
OK , I changed the track state to as close to what Marc had, (I used the UI) and used partly cloudy.
I adjusted my braking to try to have no trail braking at all but in both of the hairpins I had to touch them a little if i had gone in too deep, no biggie.

on HDF V2 set
ABS 1 down from 9
Brake bias 49 (down from 53 originally)

on VRS set
ABS 1 down from 11
Brake Bias 50

I had way better results with the HDF set , 35% tyres left on the lowest front

I still found the VRS set a little understeer heavy which also ended up with me pushing the front tyres harder than I would like, I got 12 laps into the stint with that before i got sideways and ended the run, tyres at that point were down to 45%

The HDF V2 set gets my vote currently.
As always, if anyone has a preference with a different set or has anything else to add please speak up!
 

Nejtun

Moderator
Bimmer ABS is 1 minimum assistance 11 Maximum assistance and then 12 is off, I didn't mess with the TC much but I believe higher is more assistance, didn't check which setting was "off"
 

Deb

Moderator
Guys, I am at a loss on this. I posted a thread in the forum and replies are very inconsistent as to what others are experiencing so I don't know how to fix it. It must be my driving but even trying to be very conservative didn't work yesterday. So I just don't think I can race this one.
 

Nejtun

Moderator
Let's try and get into a hosted session over the weekend if you are around deb and we can figure it out together for whoever can get on.
 

Deb

Moderator
Thanks @Nejtun. I was trying to get some good practice in this past week because I have a family event for the next 3 days out at the lakehouse. So I won't be around this weekend. I'll let you know when I get back and we might try to set something up then.
 

Twitch

iRacing Special Events 2023

Watkins Glen 6hr: GTP, LMP2, GT3 (IMSA)
  ~ June 16 - 18
24 Hours of Spa: GT3
  ~ July 21 - 23
Peachtree Three (Charity Event): C8R GTE, GT4 Class, GR86
  ~ TBD
Bathurst 1000: Supercars
  ~ September 15 - 17

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