Bahrain Tyre Wear

Hello everyone. I am recently getting back into playing GP4, and I sat down this afternoon for a race at Bahrain which I downloaded from the database. Since I'm using 2001 cars/physics, I used TomMK's 2001 magic data for this track. Anyway, I qualified 2nd, but found during the race that after a few laps I was completely unable to set competitive times anymore. It seemed like my tyre wear was exponentially higher than the AI cars. Also, this issue seems to be specific to this track and I've never noticed this at other tracks. Has anyone else ever experienced this at this track? Is there a magic data entry that might explain this? Do the asphalt runoff areas have increased tyre wear settings that cause the tyres to wear out much faster if you leave track?

Thanks!!!!

I think your confused.
You think its tyre wear is exponentially higher when it could be severe plank wear making the car very bad to drive.
Do a small race, save the file and upload here to have a look, just to confirm my theory.


2010 to 2021 Gp4 Track updates

If you use GPxPatch you can display your tyre and plank wear. I believe the default hotkey is Shift+L, but you should be able to diagnose the issue there. If you think the tyre wear is too high just turn it down in the magic data, however if it's the plank the only thing you can do really is raise the ride height.

Thanks to both of you for the replies. I will take a look at both these suggestions. I can say that when I was developing car setup, I did have the GPxPatch setting on that allowed me to see tyre wear and plank wear. The tyre wear didn't seem abnormally high after 6 laps or so, and plank wear was under .05. I can also say that I doubt the plank is the issue, because each time I changed tyres and began a new stint, I would be much faster than the cars around me, but after a few laps I would once again be unable to keep up. This is what led me to think that it was AI tyre wear and/or magic data related.

Huh, that's strange. Maybe some of the guys who research the magic data files could provide some insight?

Set the parameter Player tyre wear in the Magic data file to 12258.

desc50=player tyre wear factor

Probably it is set in a higher value.

At same time, I suspect CC tyre wear parameter (desc72 IIRC) is set to a minimum value.

Obviously if you are working on the setup, it is possible that you set the car to use much more mechanical grip than aero (lower wing setups, differential inputing more torque whilst exiting corners, roll bar adjustments, high front brake bias) all this stuff provides you great speed for a couple of laps (works well for hotlaps), but it doesn't work for longer stints.

If you share your Magic data and your setup on this thread it would help to diagnose what's going on.

Setup and magic data linked below. I did try tinkering with the magic data settings for tyre wear (both line 50 and line 72), but honestly, the base file doesn't look to be out of order.

[drive.google.com]
[drive.google.com]

I did try an experiment, focusing on running 4 smooth laps (until I ran out of fuel), checking tyre wear after those laps, and then compared to a more aggressive driving style. Tyre wear after 3 laps of the more aggressive driving was essentially the same as 4 laps with the smoother style, so a significant change, and leads me to think it's just an issue with overdriving the car. I do still wonder if there could be a significant increase in tyre wear for leaving the track on this particular circuit, though. Grip off the circuit seems higher to me, so is it possible the texture settings for runoff areas leads to a significant increase in tyre wear? If no one else has noticed any issues with this particular track, then I'm sure it's just an issue with my driving style not suiting this circuit.

Thanks for all the feedback!!!

Your tyre wear values look OK but there are other values that look out-dated - try this:

[GP4 magic file]

12        ; desc1= Front wing [CC dry setup]
12        ; desc2= Rear wing
23        ; desc3= 1st gear
30        ; desc4= 2nd
37        ; desc5= 3rd
44        ; desc6= 4th
51        ; desc7= 5th
58        ; desc8= 6th
14        ; desc9= Front wing [CC wet setup]
14        ; desc10= Rear wing
21        ; desc11= 1st gear
28        ; desc12= 2nd
35        ; desc13= 3rd
42        ; desc14= 4th
49        ; desc15= 5th
56        ; desc16= 6th
12        ; desc17= Front wing [Player dry setup]
12        ; desc18= Rear wing
23        ; desc19= 1st gear
30        ; desc20= 2nd
37        ; desc21= 3rd
44        ; desc22= 4th
51        ; desc23= 5th
58        ; desc24= 6th
5700      ; desc25= Dry brake balance
14        ; desc26= Front wing [Player wet setup]
15        ; desc27= Rear wing
21        ; desc28= 1st gear
28        ; desc29= 2nd
35        ; desc30= 3rd
42        ; desc31= 4th
49        ; desc32= 5th
56        ; desc33= 6th
5750      ; desc34= Wet brake balance
54        ; desc35= Softer tyre [52 Hard, 53 Medium, 54 Soft, 55 Supersoft]
53        ; desc36= Harder tyre [52 Hard, 53 Medium, 54 Soft, 55 Supersoft]
100       ; desc37= >= 50 AI chooses softer tyre, otherwise harder
16384     ; desc38= 
16384     ; desc39= 
16384     ; desc40= 
16384     ; desc41= 
15100     ; desc42= Track grip
16384     ; desc43= 
16384     ; desc44= 
23        ; desc45= Temperature (deg C) - top speed only affected, minimal effect in corners / acceleration? (17 - 31)
999       ; desc46= Air Pressure (hectopascals). AFFECTS PLAYER-ONLY downforce, and drag
16638     ; desc47= Engine power output - e.g. altitude simulation? Affects acceleration
8605      ; desc48= Fuel per lap - see also desc70/71
128       ; desc49= Slipstream? A distance in feet that is subtracted from the distance between 2 cars, then compared to the speed(?) of one of the behind car, and if the speed is less, something is triggered. Player only.
16384     ; desc50= Player tyre wear factor - see also desc72
64768     ; desc51= CC aggressiveness (aka Braking Range) min - now configurable in GPxPatch 4.50 (added to car.field_108. related to cc grip factor, 32768 low, 65536 & 0 mid, 32767 high)
256       ; desc52= CC aggressiveness (aka Braking Range) max - now configurable in GPxPatch 4.50
489       ; desc53= [Ace] CC power factor
560       ; desc54= [Ace] CC grip factor
487       ; desc55= [Pro] CC power factor
540       ; desc56= [Pro] CC grip factor pro
485       ; desc57= [Semi-Pro] CC power factor
520       ; desc58= [Semi-Pro] CC grip factor
483       ; desc59= [Amateur] CC power factor
490       ; desc60= [Amateur] CC grip factor
480       ; desc61= [Rookie] CC power factor
460       ; desc62= [Rookie] CC grip factor
512       ; desc63= CC random performance range min
2048      ; desc64= CC random performance range max
32        ; desc65= CC error chance - now configurable in GPxPatch 4.52
4         ; desc66= CC recovery sectors
12        ; desc67= Sectors to pit-in begin
8         ; desc68= Sectors to pit-out end
20480     ; desc69= Pre-pit speed limit
17700     ; desc70= Fuel consumption Player
16400     ; desc71= Fuel consumption CC
3600      ; desc72= Tyre wear
102       ; desc73= Track sector after which AI cars stop being cautious on 1st lap
83050     ; desc74= Hotseat turn duration - e.g. 70800 equals 1:10.800. Try to match to the real-life pole laptime if possible.
0         ; desc75= Real-time factor, speeds up or slows down the in-game time (+/-1000 equals +/- 1.0)
13960     ; desc76= Helps decide if a tyre set needs changing? (dry to wet / wet to dry) - higher values = quicker reaction
13000     ; desc77= Same as above? (dry to wet, wet to dry)
2         ; desc78= Rain chance
6         ; desc79= Segment nr (start of some range) related to pit in/out. Related to determining surface type under car.
6         ; desc80= Segment nr (end of some range) related to pit in/out. Number of segments from the end of the pits (so higher means TOWARDS the start of the pits!). Related to determining surface type under car.
256       ; desc81= CC race grip (always 256)
11000     ; desc82= A time duration (ms), used when the car is not in the pits, though it is related to the pits.
93        ; desc83= Segment where the player car starts in quicklaps mode
10000     ; desc84= Black Flag penalty (ms) (must be between 10000 - 30000)
2048      ; desc85= Black Flag severity (1024=80kph)
250       ; desc86= (Wet) CC engine mapping (higher, more detuned)
50        ; desc87= (Wet) CC tyre wear and grip factor (higher, more)
90        ; desc88= (Wet) CC tyre wear factor (lower, more)
100       ; desc89= (Wet) CC grip factor (lower, more)
0         ; desc90= "Handbrake". Stop car moving in garage? Seems to be a lateral offset from the pitbox.
1814      ; desc91= Car depth in garage (Player car)
896       ; desc92= Car depth in garage (AI cars)
0         ; desc93= Car orientation in garage 
0         ; desc94= Pitstop stall depth from pitlane (Player + AI)
0         ; desc95= Pitstop stall depth from pitlane (Player + AI) finetune
16384     ; desc96= These seem to be tyre wear factors for each tyre type (always 16384?)
16384     ; desc97= These seem to be tyre wear factors for each tyre type (always 16384?)
16384     ; desc98= These seem to be tyre wear factors for each tyre type (always 16384?)
16384     ; desc99= These seem to be tyre wear factors for each tyre type (always 16384?)
16384     ; desc100= These seem to be tyre wear factors for each tyre type (always 16384?)
16384     ; desc101= These seem to be tyre wear factors for each tyre type (always 16384?)
7         ; desc102= pitstop group 1 %
22        ; desc103= stop 1
12        ; desc104= pit window 1
0         ; desc105=
0         ; desc106=
0         ; desc107=
0         ; desc108=
0         ; desc109=
93        ; desc110= pitstop group 2 %
15        ; desc111= stop 1
8         ; desc112= pit window 1
34        ; desc113= stop 2
8         ; desc114= pit window 2
0         ; desc115=
0         ; desc116=
0         ; desc117=
0         ; desc118= pitstop group 3 %
11        ; desc119= stop 1
6         ; desc120= pit window 1
25        ; desc121= stop 2
6         ; desc122= pit window 2
39        ; desc123= stop 3
6         ; desc124= pit window 3
0         ; desc125=
744       ; desc126= failure chance : suspension (The total sum should not go beyond 126040. Note: 630 is added to each, total becomes 131080 after 8*630 is added)
744       ; desc127= failure chance : loose wheel
1488      ; desc128= failure chance : puncture
2488      ; desc129= failure chance : engine
1488      ; desc130= failure chance : transmission
744       ; desc131= failure chance : oil leak / water leak
744       ; desc132= failure chance : throttle / brake
1488      ; desc133= failure chance : electrics
16368     ; desc134= 
16256     ; desc135= 
16128     ; desc136= 
15872     ; desc137= 
19968     ; desc138= bump factor
13        ; desc139= bump shift

[bumptable]

0,0
100,0
200,0
300,0
400,0
500,0

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Intel NUC 8i3, 8GB RAM, MS Sidewinder Wheel

16384 for player tyre wear compared to 3600 CC tyre wear looks too high to me.

I would use a lower value for player tyre wear (probably 14400).