Great post, Josh.
It brings a good point to mind: We sometimes focus too much on the
hardware, and not as much on the
software.
The tires are a critical link in the package, as its the only thing touching the road!
Proper tire selection, break-in and pressure are all excellent points. I will add to that with a
log book to keep tract of what combinations did 'good' and which did 'bad' at each track will help you a ton as well. Using more of the 'software' in the drivers head so to speak.
Good springs, shocks, sways and mechanical set up are all excellent ways to lower lap times; however put a good driver in a bad car and he will out drive a bad driver in a good car.