Here's what I use but you will need to tweak it for your own setup. Likely tweaks are to track grip and air resistance.
[gp3 magic file]
171 ; fw
167 ; rw
175 ; 1st
181 ; 2nd
187 ; 3rd
193 ; 4th
200 ; 5th
206 ; 6th
55 ; hard tyre
52 ; soft tyre
100 ; >= 50 tyretype 1 else 0
16384 ; unused
16384 ; unused
16384 ; unused
16384 ; unused
16384 ; track grip
16384 ; unused
16384 ; unused
26 ; related to next value below
1000 ; ride height
16384 ; air resistance?
8650 ; fuel???
128 ; subtracted from diff between field_e2 of 2 cars and then compared to speed of first car
16384 ; tyre wear
65024 ; added to car.field_108. related to cc grip factor
256 ; grip???
10000 ; ?? cc power factor ace
9800 ; ?? cc grip factor ace
9600 ; ?? cc power factor semi-pro
9500 ; ?? cc grip factor semi-pro
8900 ; ?? cc power factor rookie
9200 ; ?? cc grip factor rookie
512 ; ?? cc random perf range min
2048 ; ?? cc random perf range max
64 ; some chance. same chance multiplied with race perc.
64 ; segment count, range 1 to 256
1 ; sectors to pit in 1
1 ; sectors to pit in 2
16384 ; pre pit speed limit
15222 ; fuel consumption 1
15074 ; fuel consumption 2
4444 ; cc shuffler???
200 ; a segment nr before which flag 0x80 in car.flags_ce is not cleared
74720 ; timing factor? (dw)
7000 ; timing factor finetune? (dw)
13960 ; helps decide if a tyre set needs changing? (dw)
11000 ; same as above (dw)
12 ; rain chance
6 ; segment nr (start of some range)
6 ; segment nr (end of some range)
512 ; another perf factor
8000 ; ukn (dw)
0 ;
10 ; pitstop group 1 %
27 ; stop 1
6 ; pit window 1
0 ;
0 ;
0 ;
0 ;
0 ;
22 ; pitstop group 2 %
19 ; stop 1
7 ; pit window 1
42 ; stop 2
6 ; pit window 2
0 ;
0 ;
0 ;
68 ; pitstop group 3 %
11 ; stop 1
8 ; pit window 1
22 ; stop 2
8 ; pit window 2
38 ; stop 3
10 ; pit window 3
0 ;
0 ; failure chance : suspension
0 ; failure chance : loosewheel
0 ; failure chance : puncture
744 ; failure chance : engine
1489 ; failure chance : transmission
2234 ; failure chance : oilleak/waterleak
0 ; failure chance : throttle/brake
750 ; failure chance : electrics
16368 ; unused
16256 ; unused
16128 ; unused
15872 ; unused
19968 ; bump factor
13 ; bump shift
[bumptable]
0,1
26,2
57,0
234,2
265,0
359,1
400,0
463,1
498,0
589,1
627,0
771,2
796,0
861,1
914,2
932,0
986,1
I will be updating this during the Istanbul practice sessions to get the cc cars to the right pace.
Nico bites yer tyres!