Glad you solved it
To your wheel:
I use a Logitech G27. I've read up on FFB clipping a bit but still don't really understand what it is.
Your wheel has a certain range of force that the motors in it can produce. That is your profiler program where you have the gain slider being at 100% at default.
Games are set to output a certain range too.
I have no idea if there is a standard but for audio you have "line level" which goes from minus infinity to 0 dB. Maybe you've seen that displayed on receivers.
So clipping happens when you exceed the maximum of either the profiler input (which is the output of the game!) or when you amplify the ffb in the profiler to above the maximum of the motors.
In both cases the forces above that level will get cut out (profiler) or will get compressed (AC afaik).
In the end imagine you have a corner ffb output of 70% of that range. Now you have a kerb that kicks in at another 30%.
With your settings you will have the cornering ffb already at 100% and the 30% coming from the kerbs will just be lost!
That was a tough and probably not well written explanation but anyway for the solution:
Profiler on 100%, 900° in profiler and in Assetto Corsa, 100% gain in Assetto Corsa!
Then probably add between 5-12% minimum force until your center position feels good.
Download the ffb clip add, set it to automatic (but NOT dynamic!) and it will dial in good car specific gain settings for each car when you drive it
If you don't want to use it just set the car specific ffb to 100% too! (numpad + or - while driving!)
If you want to have more detailed settings that might feel better for you, click on my downloads. But that guide is complicated and you have to edit files etc which I won't recommend for the beginning!!!
Hope that helps
Summary: everything on 100%, 900° and a little bit of minimum force