Hope a better late then never answer is better then nothing.
From the f1_1972_mclaren_m19c posted by MrLonguinha17 on the Assetto Corsa PC Mods General Discussion Forum.
opening the folder for the mod we find;
data
Inside which there are the following files. the lut files are just modifies for things like height above ground and wing angle.
Note not all of the included luts are used in this case.
aero.ini
height_diffuser_CD.lut
height_diffuser_CL.lut
height_frontwing_CD.lut
height_frontwing_CL.lut
height_frontwing_CL.lut
wing_body_AOA_CL.lut
wing_body_AOA_CL.lut
wing_bodylift_AOA_CL.lut
wing_controller_speed.lut
wing_front_AOA_CD.lut
wing_front_AOA_CD.lut
wing_rear_AOA_CD.lut
wing_rear_AOA_CL.lut
aero.ini is the file we want o look at first. It can be opened and edited in note pad.
as an example we can look at the front wing;
[WING_1]
NAME=FRONT
CHORD=1
SPAN=1.40
POSITION=0,-0.14,2.400
LUT_AOA_CL=wing_front_AOA_CL.lut
LUT_GH_CL=height_frontwing_CL.lut
CL_GAIN=0.78
LUT_AOA_CD=wing_front_AOA_CD.lut
LUT_GH_CD=height_frontwing_CD.lut
CD_GAIN=0.5
ANGLE=3
Here we have the Chord (1) and Span (1.4) of the wing, the area is whats important so 1 x 1.4 = 1.4
So we have a "wing" of area 1.4 square metres centre position;
POSITION=0,-0.14,2.400
Which is (0) on center line, (-0.14) below the centre of gravity, (2.400) ahead of the centre gravity or centre of the model
The forces created by this wing can be changed by changing the area to say Chord (2) and Span (1.4) for 2 x 1.4 = 2.8
by doubling the area we have doubled the forces of both lift (CL) and drag (CD) or we could change lift and drag directly
CL_GAIN=0.78 to CL_GAIN=1.56 the drag (CD) we can change seperately or leave unchanged to change the efficiency of the wing
If we are now happy with the downforce level (changing not only the front wing) we can look at the position of downforce by moving the wings. In this example perhaps we are now getting high speed oversteer by having too much of the downforce over the front axle. So POSITION=0,-0.14,2.400 perhaps changed to POSITION=0,-0.14,2.000 which moves the front wing back 0.400 metres the same can be done to any other wings or diffusers. For the rear wing the position will be negative as it is behind the centre of gravity so perhaps POSITION=0,0.25,-2.000 change to POSITION=0,0.25,-2.400
OR
We can just replace the aero ini and various luts with those from the mod we wish to compete against.
If the Centre of Gravity between the different mods is significant we may then still need to edit the aero ini by positioning the wings back or forward.
Hope this is understandable.
