Porsche 992 Carrera S: I'm trying these gear ratios listed below. I think they could still be shortened and tweaked to match the real ratios and get better performance out of the car, and someone with more experience could likely do a better job than I.
These settings are in the drivetrain.ini file. You'll have to unpack the data.acd file to get to it.
[GEARS]
COUNT=8 ; forward gears number
GEAR_R=-3.55 ; rear gear ratio
; forward gears ratios. must be equal to number of gears defined on count
GEAR_1=3.977
GEAR_2=2.857
GEAR_3=2.257
GEAR_4=1.730
GEAR_5=1.225
GEAR_6=1.000
GEAR_7=0.820
GEAR_8=0.620
FINAL=3.925 ; final gear ratio
[GEARS -ORIGINAL
COUNT=8 ; forward gears number
GEAR_R=-3.55 ; rear gear ratio
; forward gears ratios. must be equal to number of gears defined on count
GEAR_1=4.89
GEAR_2=3.17
GEAR_3=2.15
GEAR_4=1.56
GEAR_5=1.18
GEAR_6=0.94
GEAR_7=0.76
GEAR_8=0.61
FINAL=3.12 ; final gear ratio ]
Apparently both 7th and 8th are "overdrive" gears but the original mod's ratios for 1-6 are sluggish, and the settings I'm trying still make the car feel "heavy" in the drive train.
https://rennlist.com/forums/992/1119091-992-gear-ratios-are-shorter-than-in-the-991-a.html