Changes From Model 4 Tires to Model 5

[HypoToad]

Anyone who wants to know what changes there have been in the new tire model from the last one, I have listed the changes only and some were not present in Model 4 as you can see.

It might be possible to upgrade older cars with the newer tires?

The column on the left is the newer Model 5's and the right the older Model 4's:

ks_bmw_m235i_racing Tyre Model 5 //// ks_bmw_m235i_racing Tyre Model 4

VERSION=5 //// VERSION=4

////
[COMPOUND_DEFAULT] //// [COMPOUND_DEFAULT]
INDEX=0 //// INDEX=0

////
[FRONT] //// [FRONT]
NAME=Trofeo Slicks //// NAME=Trofeo Slicks
DAMPING RATE=265836 //// DAMPING RATE=255778
SPEED_SENSITIVITY=0.003078 //// SPEED_SENSITIVITY=0.006141
ROLLING_RESISTANCE_1=0.000508 //// ROLLING_RESISTANCE_1=0.001016
ROLLING_RESISTANCE_SLIP=6292 //// ROLLING_RESISTANCE_SLIP=3292
DCAMBER_0=1.3 //// DCAMBER_0=1.6
DCAMBER_1=-12 //// DCAMBER_1=-13
FRICTION_LIMIT_ANGLE=6.9 //// FRICTION_LIMIT_ANGLE=9.9
PRESSURE_SPRING_GAIN=11076 //// PRESSURE_SPRING_GAIN=10658
PRESSURE_RR_GAIN=1.0 //// PRESSURE_RR_GAIN=1.5
FZ0=3290 ////---------------------------
LS_EXPY=0.73 ////-----------------------
LS_EXPX=0.73 ////-----------------------
DX_REF=1.45 ////-----------------------
DY_REF=1.45 ////-----------------------
FLEX_GAIN=0.042 ////-----------------------

////
[REAR] //// [REAR]
RATE=265836 //// RATE=255778
SPEED_SENSITIVITY=0.003078 //// SPEED_SENSITIVITY=0.006141
ROLLING_RESISTANCE_1=0.000508 //// ROLLING_RESISTANCE_1=0.001016
ROLLING_RESISTANCE_SLIP=6292 //// ROLLING_RESISTANCE_SLIP=3292
DCAMBER_0=1.3 //// DCAMBER_0=1.6
DCAMBER_1=-12 //// DCAMBER_1=-13
FRICTION_LIMIT_ANGLE=6.9 //// FRICTION_LIMIT_ANGLE=9.9
PRESSURE_SPRING_GAIN=11076 //// PRESSURE_SPRING_GAIN=10658
PRESSURE_RR_GAIN=1.0 //// PRESSURE_RR_GAIN=1.5
FZ0=3290 ////----------------------
LS_EXPY=0.73 ////--------------------
LS_EXPX=0.73 ////--------------------
DX_REF=1.45 ////--------------------
DY_REF=1.45 ////--------------------
FLEX_GAIN=0.042 ////---------------------

////
[THERMAL_FRONT] //// [THERMAL_FRONT]
SURFACE_TRANSFER=0.040 //// SURFACE_TRANSFER=0.01733
PATCH_TRANSFER=0.00027 //// PATCH_TRANSFER=0.12996
CORE_TRANSFER=0.005078 //// CORE_TRANSFER=0.15896
INTERNAL_CORE_TRANSFER=0.0038 ////
FRICTION_K=0.04940 //// FRICTION_K=0.01311
ROLLING_K=0.25 //// ROLLING_K=0.44832
GRAIN_GAMMA=1 //// GRAIN_GAMMA=2
GRAIN_GAIN=0.5 //// GRAIN_GAIN=0.6
BLISTER_GAMMA=1 //// BLISTER_GAMMA=2
BLISTER_GAIN=0.5 //// BLISTER_GAIN=1.0
COOL_FACTOR=1.32 ////--------------------------

////
[THERMAL_REAR] //// [THERMAL_REAR]
SURFACE_TRANSFER=0.040 //// SURFACE_TRANSFER=0.01733
PATCH_TRANSFER=0.00027 //// PATCH_TRANSFER=0.12996
CORE_TRANSFER=0.005078 //// CORE_TRANSFER=0.15896
INTERNAL_CORE_TRANSFER=0.0038 ////
FRICTION_K=0.04940 //// FRICTION_K=0.01311
ROLLING_K=0.25 //// ROLLING_K=0.44832
GRAIN_GAMMA=1 //// GRAIN_GAMMA=2
GRAIN_GAIN=0.5 //// GRAIN_GAIN=0.6
BLISTER_GAMMA=1 //// BLISTER_GAMMA=2
BLISTER_GAIN=0.5 //// BLISTER_GAIN=1.0
COOL_FACTOR=1.17 ////------------------------------

 

[Matheus Machado]

Where did you get that data from? Amazing for a better understanding on how to adjust setups for the new tire model!
@Cristian Haba That explains the lower top speeds and higher variation of temperatures.

 

[FishPapp]

It's the tyre.ini file.

I copied over the new lines to the Ginetta G55 file to see if it works and it does appear to change car behaviour under braking (I do need to test more). And, I need to find a better match for the car on tyre size etc, but I think it's possible to patch in the new tyre model this way.

It could also be more complicated than that.

*edit*
Looks like this will only work with (some?) mod cars but not Kunos ones as the data folder has gone. Kunos will update their own cars anyway.

 

[HypoToad]

It's the tyre.ini file.
*edit*
Looks like this will only work with (some?) mod cars but not Kunos ones as the data folder has gone. Kunos will update their own cars anyway.

I got this from the data.acd file and upacked it with quickbms which makes the data folder in Kunos cars, it works a treat at unpacking and repacking.

 

[FishPapp]

Thanks for the tip HT.