It came as something of a surprise to me after about 40 years of road driving to realise when I started track racing that I had no idea how to work out how fast I could take a corner, where to brake and how hard, etc, and of course 10 years on I'm still learning. Its often an amazement to look at my lap times and realise I've done one lap maybe 2 seconds quicker than any other....without the faintest idea why
I suppose the aforementioned datalogging and video is the answer, but doubt I'll get round to it