Great work on the model detail. Looks fantastic. Some suggestions for the next update. Take a look at:
http://tech-racingcars.wikidot.com/tvr-tuscan-t400r
Your model is 180mm too wide and 200mm too long. Wheelbase is also 229mm too long. Height is about right so you will need to do some rescaling. Try and have all your body parts external of your cockpit in one parent (eg CHASSIS_TVR). This will make rescaling much easier.
Compare to my GTR2 conversion on the right which has the correct dims:
View attachment 1317852
Also try and change the main body shader to ksPerPixelMultiMap_damage_dirt, so the body will show dirt and damage when appropriate.
Wheels and tyres are a bit large for what they ran on these cars. It should be something like this:
[FRONT]
WIDTH=0.262
RADIUS=0.3235
RIM_RADIUS=0.254
[REAR]
WIDTH=0.292
RADIUS=0.340
RIM_RADIUS=0.254
Physics there are a few things as well. Some here have touched on the gear change times. Data taken from Xtrac for sequential change should be like this:
[GEARBOX]
CHANGE_UP_TIME=100
CHANGE_DN_TIME=150
AUTO_CUTOFF_TIME=100 this should align with the same in ai.ini and AUTO SHIFT at the end of drivetrain.ini
You should also raise your engine damage rpm point to be above your rev limit point. If you have it close, put a hard cut on the limiter frequency at 333Hz.
The power.lut shows no transmission loss. On this car I expect it would be at least 11%.
The car weight is 70kg too light as well.