One of the most important abilities you must possess if you want to succeed (in your sport and career) is the ability to perform on demand.
There is no value in having the skill but not being able to access that skill on demand, when the 'pressure' is on.
Here is a very simple breathing and mental technique that can help you remain centred and calm when you are competing. This can be used in all parts of your life, not just racing.
I hope this helps in some way.
P.S. Let me know your driver coaching and driver performance questions