Found how to enable console and how to change FOV:
edit this file:
C:\Program Files (x86)\Steam\steamapps\common\rage\base\default.cfg
after unbindall add:
In game this enables console with use of ` key.
In-game you can edit various FOVs. With the console open type 'find fov' and hit enter. You can see all the different FOV settings.
To set the FOV in the console:
- cvaradd g_fov 10
- Where 10 is the amount added to 80 of the FOV
I can confirm using console doesn't disable Steam achievements. I used console and then got an achievement shortly afterward.